OS/2 Shareware BBS: 4 Drivers/04-Drivers.zip/wr2isae1.exe/INF.Z/WRMOS2.INF

OS/2 Help File | 1998-01-12 | 168KB | 5,594 lines

ΓòÉΓòÉΓòÉ 1. Contents ΓòÉΓòÉΓòÉ

 ISDN  Data/Fax Modem


General Information
Applications
AT Command Summary
S-Register Summary
Problem Solving

Select Expanded Table of Contents for a larger listing of topics.


ΓòÉΓòÉΓòÉ 2. Expanded Table of Contents ΓòÉΓòÉΓòÉ

 Expanded Table of Contents

General Information
Adapter Overview
ISDN Overview
Glossary of Terms
Trademarks
Applications
ISDN Port Monitor
ISDN Port Configuration Help
Multiple Configurations
ISDN Port Status
ISDN Port Messages
FAX
ProComm PLUS
COMM Port Drivers
COMM Port Drivers Overview
Starting and Stopping a Driver
Monitoring a Driver
Controlling the Speaker Volume
Configuring a Driver
Call Overrides
Minimizing
Change Phone Number Discrimination
Driver Messages and Codes
Modem Driver
Modem Messages and Codes
Modem LED Indicators
Improving Modem Performance
V.120 Driver
V.120 Configuration Help
V.42bis Compression
Communicating with V.120
Improving V.120 Performance
V.120/Modem Driver
Async-to-Sync Driver
Async-to-Sync Configuration Help
HDLC Async-to-Sync Driver
TCP/IP Driver
AT Command Summary
Issuing AT Commands
AT Result Codes and Messages
Command Syntax Overview
Dialing Differences for ISDN
S-Register Summary
S-Register Values
Problem Solving


ΓòÉΓòÉΓòÉ 3. ISDN COMM Port Drivers ΓòÉΓòÉΓòÉ

 ISDN COMM Port Drivers

COMM Port Drivers Overview
Starting and Stopping a Driver
Monitoring a Driver
Controlling the Speaker Volume
Configuring a Driver
Call Overrides
Minimizing
Change Phone Number Discrimination
Driver Messages and Codes
Modem Driver
Modem Messages and Codes
Modem LED Indicators
Improving Modem Performance
V.120 Driver
V.120 Configuration Help
V.42bis Compression
Communicating with V.120
Improving V.120 Performance
V.120/Modem Driver
Async-to-Sync Driver
HDLC Async-to-Sync Driver
TCP/IP Driver
AT Command Description
S-Register Summary


ΓòÉΓòÉΓòÉ 4. COMM Port Drivers Overview ΓòÉΓòÉΓòÉ

 COMM Port Drivers Overview

The ISDN Data/Fax Modem includes the following COMM (Communication) port
drivers that enable existing COMM port applications to run:

ΓêÖ Modem Driver
ΓêÖ V.120 Driver
ΓêÖ V.120/Modem Driver
ΓêÖ Asynchronous Data Link Converter (ADLC)


For detailed driver information, click on one of the following driver icons:

Modem Driver V.120 Driver V.120/Modem Driver Async-to-Sync Driver

To start a driver, select the driver icon from the ISDN Data/Fax Modem group
window.  When you start a driver, the driver's window appears.  You can perform
any of the following functions from the driver window:

ΓêÖ Monitor the driver
ΓêÖ Configure the driver
ΓêÖ Set speaker volume
ΓêÖ Set call overrides (not available on the Modem driver)
ΓêÖ Minimize the driver

Note:  To start a COMM Port Driver automatically when you start up OS/2, place
a copy of the driver icon in the OS/2 Startup folder.

The following are examples of communication applications that have been tested
with the ISDN Data/Fax Modem. If an application is not listed, it may still be
able to run with the ISDN Data/Fax Modem software.

HyperACCESS for OS/2
ProComm PLUS for Windows (under WIN OS/2)
Windows Terminal (under WIN OS/2)

Refer to your communication application's documentation for information on how
to use and start the software.


ΓòÉΓòÉΓòÉ 5. Starting and Stopping a Driver ΓòÉΓòÉΓòÉ

 Starting and Stopping a Driver

An ISDN COMM Port Driver is started when you open the icon for the driver.

An ISDN COMM Port Driver is stopped when you close the driver window.
Double-click on the upper left-hand corner of the window to close it.

Note:  To start a COMM Port Driver automatically when you start up OS/2, place
a copy of the driver icon in the OS/2 Startup folder.


ΓòÉΓòÉΓòÉ 6. Controlling the Speaker Volume ΓòÉΓòÉΓòÉ

 Controlling the Speaker Volume

The speaker ON/OFF state is controlled with the ATM command, and the speaker
volume is controlled with the ATL command.  The Speaker pull-down provides
another convenient method to control the speaker volume.  If the speaker is ON,
the volume can be set to High, Medium, Low, or Very Low.


ΓòÉΓòÉΓòÉ 7. Configuring a Driver ΓòÉΓòÉΓòÉ

 Configuring a Driver

The Actions pull-down is used to display the options you may select when
configuring a driver.  The Actions pull-down can be displayed only when the
driver has been activated and may include options such as changing the driver
configuration or the driver phone number discrimination.


ΓòÉΓòÉΓòÉ 8. Call Overrides ΓòÉΓòÉΓòÉ

 Call Overrides

An ISDN phone number will be assigned one of three grades of service: CSV/D
will support voice and data calls; CSD will support only data calls; and CSV
will support only voice calls.  A digital driver will treat a voice call like a
56-kbps data call. The call is identified only as voice to the ISDN.


Outgoing calls:
Use the Change Phone Number Discrimination option to enable a phone number to
place outgoing calls.  A uses an enabled CSD or CSV/D phone number for data
calls or an enabled CSV or CSV/D phone number for voice band data modem calls.

A driver will place outgoing calls as follows:

 1. It will use a CSD- or CSV/D-enabled phone number to place a 64-kbps data
    call.

 2. If the call leaves the ISDN, it will drop back to 56 kbps.

 3. If the call is rejected because the called party does not support 64 kbps,
    it will retry the call as a 56-kbps data call.

 4. If the call is rejected because the called party does not support 56-kbps,
    it will use a CSV- or CSV/D-enabled phone number to retry the call as a
    voice call.

If the only enabled phone number is a CSD phone number, step 4 will not be
attempted.  If the only enabled phone number is a CSV phone number, only step 4
will be attempted.

The ISDN does not always specify why a call is rejected. In these cases the
driver will not retry the call. The Overrides pull-down provides a method to
specify how a call is placed.  The driver will start at step 3 if the selection
is Place Calls Out as 56-kbps.  The driver will use only step 4 if the
selection is Place Calls Out as Voice.


Incoming calls:
If the phone number is a CSD phone number, the ISDN will not deliver voice
calls.  If the phone number is a CSV phone number, the ISDN will not deliver
data calls.  The network, not the digital driver, rejects the calls.

Use the Change Phone Number Discrimination option to determine which incoming
calls will be answered.  The ISDN will identify the call as a 64-kbps call, a
56-kbps call, or a voice call.

On rare occasions the ISDN might identify a 56-kbps call as a 64-kbps call.
All data exchanges will fail since the two parties are using different speeds.

The Overrides pull-down provides a method to force an incoming call to 56 kbps.
If the selection is "Force Calls In to 56 kbps", all incoming 64-kbps calls
will be treated as 56-kbps calls.

Warning:  Use this selection with extreme caution.  If the call really is a
64-Kbps call, all data exchanges will be corrupted.


ΓòÉΓòÉΓòÉ 9. Minimizing ΓòÉΓòÉΓòÉ

 Minimizing

Minimize the driver window by clicking on the minimize button in the upper
right-hand corner of the window.


ΓòÉΓòÉΓòÉ 10. Modem Driver ΓòÉΓòÉΓòÉ

 Modem Driver

The modem driver enables any standard communications or terminal emulation
application that interfaces to a COMM port and uses the standard AT command set
for setting up calls.  The Modem driver enables communications with any
standard modem or with another ISDN Data/Fax Modem using the Modem driver.

The ISDN or Analog Modem is a standard, Hayes AT Command-compatible modem.  It
can be configured for three different maximum speeds; a 2400-bps and below
modem (V.22bis, Bell 212A, Bell 103, V.21), a 14400-bps and below modem
(V.32bis), and a 28800-bps and below modem (V.34 for the PCMCIA Analog Modem).
The modem loaded is determined by the configuration pull-down.  The Modem
option is also capable of Microcom* networking protocol (MNP*) class 4 or V.42
error correction and MNP class 5 or V.42bis data compression.

Note:  The higher speed modems use more of the ISDN Adapter resources.  If you
are trying to run another ISDN application concurrently with the modem, you may
need to load a lower speed modem.

The ISDN Data/Fax Modem adapter appears as a modem to your communication
applications.  Such communication applications do not usually know whether the
modem is internal or external to the personal computer system.  Communication
applications depend on the user to turn the modem on and to select which serial
port should be used to access the modem.  You can select any one of the serial
port values from COM 1 through COM 4 as the ISDN Data/Fax ModemТs COMM port.

Note:  Always start the modem before attempting to use the COMM port, and use
COM 1 or COM 2 when possible.  All applications may not be compatible with
higher COMM ports.

Before you begin your communication application, start the ISDN Data/Fax Modem
driver.  To start the modem driver:

 1. Click on the Modem icon in the ISDN Data/Fax Modem group window.  The Modem
    window will appear and a message indicating that the modem is ready will
    display in the Status Message field.

    Note:  You can monitor the driver through the LED Indicators that appear in
    the driver window.

 2. If you want to change the configuration of the modem, select Actions from
    the Modem window.  Then, select Configuration to change the modem speed or
    select Speaker Volume to change the speaker control features.

 3. When you have finished selecting the options you want to use with your
    modem, minimize the Modem window.  Do not close the window.  Closing the
    Modem window is effectively the same as turning the modem off, and will
    therefore prevent you from using your communication application.

Your modem is now started and ready to use with your communication application.

Refer to COMM Port Overview for a listing of applications that can be run with
the ISDN Data/Fax
Modem.  For information on configuration help, select Change Phone Number
Discrimination

Note:  When you have finished using the modem, turn it off.  You must do this
before loading any other application drivers for the ISDN Data/Fax Modem.  To
turn the modem driver off, close the Modem window.


ΓòÉΓòÉΓòÉ 11. V.120 Driver ΓòÉΓòÉΓòÉ

 V.120 Driver

The V.120 option enables higher data rates with standard communications or
terminal emulation applications that interface to a COMM port and use the
standard AT command set for setting up calls.  Communications can be
established with other ISDN adapters that support V.120 protocol at data rates
up to 64 000 bps.

The V.120 protocol is a popular synchronous data protocol used in ISDN
communications.  It supports data rates up to the line speed of the ISDN line,
56 Kbps or 64 Kbps.  The V.120 protocol is used to enable applications designed
for asynchronous communications to use the synchronous 64 000-bps rate
available with an ISDN line.  V.120 can be run in error-correction mode
(Multiframe Mode enabled) or non-error- correction mode (Multiframe Mode
disabled).  Non-error-correction mode is sometimes referred to as UI mode.
V.120 presents the same interface, a Communications (COMM) port, to the
Communications application as a Hayes-compatible modem; however, the ISDN
Data/Fax Modem does not support Hayes* extensions to the AT command set for
V.120.

Note:  The V.120 driver should be turned on before activating the communication
application you use, and when you have finished, turn the V.120 driver off so
other drivers can be loaded.

For information on V.42bis compression or communication tips with V.120,
select:

V.42bis Compression Over V.120
Tips for Communicating Using V.120


To start the V.120 Driver:

 1. Click on the V.120 Driver icon in the ISDN Data/Fax Modem group window.
    The V.120 Driver window will appear.  A message indicating that the V.120
    Driver is ready will display in the Status Message field of the V.120
    Driver window.

    Note:  You can monitor the driver through the LED Indicators that appear in
    the driver window.

 2. If you want to change the configuration of the V.120 Driver, select Actions
    from the V.120 Driver window.  Then, select Configuration to change the
    V.120 configuration parameters or select Speaker Volume to change the
    speaker control features.

    Note:  Use of the default settings is recommended.  Advanced users may want
    to modify some of these settings to optimize performance for a specific
    environment.  Several options that may require frequent changes are placed
    in a separate group of Override options for easier access.

 3. When you have finished selecting the options you want to use with your
    V.120 Driver, minimize the V.120 Driver window.  Do not close the window.
    Closing the V.120 window is the same as turning the driver off, and will
    prevent you from using your communication application.

Your driver is now started and ready to use with your communication
application.

Refer to the documentation supplied with your communication applications for
instructions on using the applications.  For information on configuration help
or performance, select:

V.120 Configuration Help
Change Phone Number Discrimination
Call Overrides
Controlling the Speaker Volume
Hints and Tips for Improving V.120 Performance


ΓòÉΓòÉΓòÉ 12. V42bis Compression ΓòÉΓòÉΓòÉ

 V42bis Compression Over V.120

The V.120 Driver, by default, supports V42bis.  V42bis is an ITU-T standard for
data compression. Negotiation between two stations for compression is carried
out over the B-channel via an XID frame. Successful negotiation for V42bis at
64 Kbps results in a "CONNECT 64000 ECLC" message (error correcting link with
compression).

Some V.120 Terminal Adapters may not support compression or the XID frame.  As
a result, calls may fail to establish a connection.  If you experience
difficulty connecting calls with compression On, disable V42bis with the AT
command "Hn.  For more information, see "H V.42bis Conpression Control.


ΓòÉΓòÉΓòÉ 13. Tips Communicating with V.120 ΓòÉΓòÉΓòÉ

 Tips for Communicating using V.120:

The following information provides tips for communicating  using V.120 with
other manufactures' terminal adapters:

If you are unable to maintain a connection:
If the adapter is in the answering machine and you get a "CONNECT" message then
a "NO CARRIER" message before sending any data, increase the value of the
retransmission timer (T200) on the first V.120 configuration panel.  Usually
increasing it to 2 seconds is enough to establish the connection.

If File Transfer starts, but doesn't complete successfully:
If a file transfer fails after data has been received successfully, decrease
the window size (K) on the transmitting machine.  Typically 3 (the default) is
a good window size.

General Communications:
If experiencing other problems, make sure that the transmitter and receiver
have their V.120 window size (K) and data field size (N201) set to the same
values.  This would probably be seen as a buffer overrun error (data being
transferred to the screen instead of the specified file).  Set the COMM Port
speeds to the same value, or decrease the transmitter's speed.

Set both Terminal Adapters for Multiframe Mode.  (second V.120 panel).

ISDN speeds can only be achieved through the aid of a COMM Port accelerator.
Some applications, such as SmartCom or HyperAccess, may include one of their
own.  If the application you use does not provide a COMM Port accelerator,
install one such as KingCom.

Zmodem File Transfers:
When using the Zmodem file transfer protocol, change the window size option to
4K (4096).  This will reduce occurrences of bad "CRCs" and improve performance.


ΓòÉΓòÉΓòÉ 14. Hints and Tips for Improving Performance ΓòÉΓòÉΓòÉ

 Hints and Tips for Improving V.120 Performance

If there are two phone numbers associated with the ISDN line, make sure that
you are configuring the correct phone number.  Refer to the Call Overrides
section for an explanation of which phone number is used for outgoing calls.


Unable to maintain a connection.

Symptom:  V.120 is the answering machine and you get a CONNECT message followed
          by a NO CARRIER message before any data has been sent.

Solution: Increase the value of the Retransmission Timer (T200) on the V.120
          configuration panel.  Usually, increasing it to 2 seconds is enough
          to establish the connection.


File transfer starts, but doesn't complete successfully.

Symptom:  File transfer fails after data has been received successfully.

Solution: Decrease the Window Size (K) on the transmitting machine.  A value of
          3 (the default value) is a good window size.


General V.120 communications problems.

Symptom:  Overrun errors and other communications problems.

Solution: Insure that the transmitter and receiver have their V.120 Window Size
          (K) and Data Field Size (N201) set to the the same values.  Set the
          COMM port speeds to the same value or decrease the transmitter's
          speed.  Set both Terminal Adapters for Multiframe Mode.


ΓòÉΓòÉΓòÉ 15. V.120/Modem Driver ΓòÉΓòÉΓòÉ

 V.120/Modem Driver

The V.120/Modem option enables you to take full advantage of the flexibility of
ISDN by combining the V.120 and modem drivers. This option is intended for
answering incoming calls when you don't know who might be calling.  It will
make the connection using the high-speed V.120 function whenever possible, but
it will automatically fall back to the lower speed modem option if necessary to
complete the connection.

If you have two different telephone numbers assigned to your ISDN line, you can
associate one of those numbers with the modem option and the other with the
V.120 option.  The desired driver will be activated once the ISDN Port Monitor
detects which of the two numbers is being called.  If you only have one phone
number assigned to your ISDN line, you must request CSV/D (Circuit Switched
Voice and Data) service for that number.  This means that the telephone company
can process both voice and data calls to the same telephone number.  With this
option, the V.120/Modem driver will make the high-speed V.120 connection
whenever possible, but will use the modem function if the telephone network
sends a message that indicates that the high-speed digital connection is not
available.

 V.120 presents the same interface, a Communications (COMM) port, to the
Communications application as a Hayes-compatible modem; however, the ISDN
Data/Fax Modem does not support Hayes* extensions to the AT command set for
V.120.

Note:  All of the applications listed in COMM Port Overview can be used with
the V.120/Modem driver.  The V.120/Modem driver should be turned on before
activating the communication application you use, and when you have finished,
turn the V.120/Modem driver off so other drivers can be loaded.

 For more information on the Modem or V.120 Driver, select:

Modem Driver
V.120 Driver

For information on V.42bis compression or communication tips with V.120,
select:

V.42bis Compression Over V.120
Tips for Communicating Using V.120

To start the V.120/Modem driver:

 1. Click on the V.120/Modem Driver icon in the ISDN Data/Fax Modem group
    window.  The V.120/Modem Driver window will appear.  A message indicating
    that the V.120/Modem Driver is ready will display in the Status Message
    field of the V.120/Modem window.

    Note:  You can monitor the driver through the LED Indicators that appear in
    the driver window.

 2. If you want to change the configuration of the V.120/Modem Driver, select
    Actions from the V.120/Modem Driver window.  Then, select Configuration to
    change the various parameters that control the function of the V.120/Modem
    driver or select Speaker Volume to change the speaker control features.

    Note:  Use of the default settings is recommended.  Advanced users may want
    to modify some of these settings to optimize performance for a specific
    environment.  Several options that may require frequent changes are placed
    in a separate group of Override options for easier access.

 3. When you have finished selecting the options you want to use with your
    V.120/Modem Driver, minimize the V.120/Modem window.  Do not close the
    window.  Closing the V.120/Modem window is effectively the same as turning
    the driver off, and will therefore prevent you from using your
    communication application.

Your driver is now started and ready to use with your communication
application.

Refer to the documentation supplied with your communication applications for
instructions on using the applications.  For information on configuration or
performance, select:

V.120 Configuration Help
Change Phone Number Discrimination
Call Overrides
Controlling the Speaker Volume
Hints and Tips for Improving V.120 Performance


ΓòÉΓòÉΓòÉ 16. ADLC Driver ΓòÉΓòÉΓòÉ

 Async-to-Sync Driver

The Asynchronous Data Link Converter (ADLC) contains support for the HDLC -
ASYNC to SYNC Driver and the TCP/IP Drivers.  To get more information on these
drivers, select:

 HDLC Driver or
 TCP/IP Driver

The ADLC should be turned on before activating the LAN Distance program (if
using HDLC) or your TCP/IP application (if using TCP/IP).

To start the ADLC:

 1. Click on the ADLC icon in the ISDN Data/Fax Modem group window.  The ADLC
    window will appear, with the driver you have currently chosen displayed in
    the title bar.  A message indicating that the driver is ready will appear
    in the Status Message field of the driver window.

    Note:  You can monitor the driver through the LED Indicators that appear in
    the driver window.

 2. If you want to configure the ADLC or change the current configuration,
    select Actions from the driver window.  Select Configuration from the
    Actions pulldown menu.  Then, select Async-to-Sync Configuration from the
    Configuration pulldown menu. Select the driver you wish to use and then
    select Save and Exit.

    Note:  If you choose TCP/IP SLIP-to-RFC 1294 Encapsulation, supply the
    4-digit hexadecimal DLCI value and optional User Name.  The user should
    note that RFC1294 has been replaced by RFC1490.  The term RFC1294 will
    continue to be used due to historical significance.

    Take note of the Overrides menu item in the driver window.  Several options
    that may require frequent changes are placed under the Override options for
    easier access.

 3. When you have finished selecting the options you want to use with the ADLC,
    minimize the driver window.  Do not close the window.  Closing the driver
    window is effectively the same as turning the driver off, and will
    therefore prevent you from using your communication application.

Your driver is now started and ready to use with your communication
application.

Refer to the documentation supplied with your communication applications for
instructions on using the applications.  For information on configuration help,
select:

Async-to-Sync Configuration Help
Change Phone Number Discrimination
Call Overrides
Controlling the Speaker Volume


ΓòÉΓòÉΓòÉ 17. HDLC Async-to-Sync ΓòÉΓòÉΓòÉ

 HDLC Async-to-Sync Driver

The  HDLC - ASYNC to SYNC Converter enables an HDLC/Async Communications
Application, such as LAN Distance, to communicate synchronously over an ISDN
line.  The combination of the ISDN Data/Fax Modem and the LAN Distance software
allows a remote user to access the same LAN applications available to a locally
LAN-attached terminal.  The 64 000 bps throughput of the ISDN results in
terminal response times almost as fast as a locally attached terminal.

The LAN Distance* application, configured to use Asynchronous Encapsulation of
HDLC to the Communications (COMM) Port, can use the converter to communicate
with a synchronous IBM LAN Distance Server.  The HDLC Async-to-Sync Converter
presents the same interface, a Communications (COMM) Port, to the HDLC/Async
application as a Hayes AT Command-compatible modem.  Always start the HDLC
Async-to-Sync Driver before attempting to use the COMM port, and when you have
finished, turn the driver off so other drivers can be loaded.

Note:  When using this driver, the LAN Distance Program must use the
Asynchronous encapsulation of HDLC to the COMM Port of your personal computer
system.  The device with which you are communicating must appear as a standard
synchronous interface to the LAN Distance Server.

The HDLC driver should be turned on before activating the LAN Distance program.
When you have finished, turn the HDLC driver off so other drivers can be
loaded.


ΓòÉΓòÉΓòÉ 18. TCP/IP Driver ΓòÉΓòÉΓòÉ

 TCP/IP Driver

The transmission control protocol/internet protocol (TCP/IP) option enables
TCP/IP applications with serial line Internet protocol (SLIP) COMM Port drivers
to connect to TCP/IP networks at data rates up to 64 000 bps.  The control
characters associated with a SLIP COMM Port driver are removed and the Internet
Protocol (IP) data packets can be encapsulated using HDLC or RFC 1294, to
communicate with other ISDN adapter cards or routers that support TCP/IP at
ISDN speeds.

Note:  When using this driver, the TCP/IP application you use must have a SLIP
driver interface to the COMM Port of your PC, but the device with which you are
communicating must present the appearance of a standard synchronous interface.

The TCP/IP SLIP-to-Sync Converter presents the same interface (a COMM port) to
the TCP/IP application as a Hayes compatible modem.  Always start the TCP/IP
SLIP-to-Sync Driver before attempting to use the COMM port, and when you have
finished, turn the V.120/Modem driver off so other drivers can be loaded.


TCP/IP SLIP-to-HDLC Encapsulation:
The Serial Line Internet Protocol (SLIP) defines a technique to transfer TCP/IP
data packets between two asynchronous devices, typically modems.

The TCP/IP SLIP-to-Sync Converter allows a TCP/IP application that supports
SLIP to communicate with a synchronous TCP/IP device.  The converter, running
on the adapter, removes the control characters associated with SLIP and
transmits the IP data packets at a 56-kbps or 64-kbps data rate.

The TCP/IP SLIP-to-Sync Converter presents the same interface, a Communications
(COMM) port, to the TCP/IP application as a Hayes-compatible modem.  Always
start the TCP/IP SLIP-to-Sync Driver before attempting to use the COMM port,
and when you have finished, turn the driver off so other drivers can be loaded.


TCP/IP SLIP-to-RFC1294 Encapsulation:
The Serial Line Internet Protocol (SLIP) defines a technique to transfer TCP/IP
data packets between two asynchronous devices, typically modems.

The TCP/IP SLIP-to-Sync Converter allows a TCP/IP application that supports
SLIP to communicate with a synchronous TCP/IP device.  The converter, running
on the adapter, removes the control characters associated with SLIP and
transmits the IP data packets encapsulated with RFC1294 (RFC1490 -- see the
following note) framing at a 56-kbps or 64-Kbps data rate.

Note:  RFC1294 has been replaced by RFC1490.  The term RFC1294 will continue to
be used due to historical significance.


ΓòÉΓòÉΓòÉ 19. User Interface: Messages and Codes ΓòÉΓòÉΓòÉ

 Driver User Interface: Messages and Codes

Message Number      Message Text and Description

ERR01               Internal Error or ISDN Data/Fax Modem internal error.

                    An ISDN driver has detected an internal error, a system
                    error, or an adapter error.  Rebooting the system may clear
                    the error condition.

                    Record the information in the error dialog box and report
                    it to the service contact listed in your installation
                    documentation.

ERR02               Another driver is using the phone line.

                    The phone line is being used by an ISDN driver and you
                    attempted to load a second driver.  Only one ISDN driver
                    may use the phone line at a time.  First, terminate the
                    ISDN driver you no longer wish to use, then retry the
                    desired ISDN driver.

ERR03               Another driver is using the COMM port.

                    The communications port is currently being used by another
                    ISDN driver. Terminate the other ISDN driver and retry the
                    desired driver.

ERR04               The ISDN adapter is over committed.  Stop an ISDN
                    application and restart.

                    The ISDN adapter does not have enough resources available
                    to run the ISDN driver.  Terminate one of the currently
                    running ISDN applications and reload the ISDN driver.  If
                    the ISDN Port Monitor is the only ISDN application running,
                    try unloading the ISDN Port Monitor, reloading the ISDN
                    Port Monitor, and then retry the ISDN driver.

ERR07               Unable to locate adapter files... reinstall.

                    Make sure to reboot your computer after installation.  This
                    problem should not occur if ISDN Data/Fax Modem has been
                    installed correctly.  If the error persists, reinstall the
                    ISDN Data/Fax Modem.

ERR08               The Mwave Manager is not loaded.

                    The Mwave Manager is not loaded or is not responding.  In
                    OS/2 only...start the Mwave Manager Daemon, and then try to
                    start the modem again.

ERR09               The Selected Country does not match the external telephone
                    coupler.

                    The cable you have plugged into your modem does not match
                    the country you selected when your modem was configured.

ERR19               The phone handset is already in use.

                    The handset is being used by an ISDN driver.  If the ISDN
                    Data/Fax Modem ended prematurely (trapped, for example)
                    this error might be encountered.  You need to restart the
                    operating environment (Windows or OS/2) and try again.

ERR20               Unable to communicate over the ISDN D-Channel.

                    The ISDN driver cannot communicate with the D-Channel DLL
                    or the D-Channel protocol code.

ERR21               Internal call control error.

                    The ISDN driver has experienced a fatal error communicating
                    with the adapter control code.  You need to restart the
                    operating environment and try again.

ERR22               No OS/2 timers available!

                    There are no OS/2 timers available for your ISDN
                    application.  Stop another OS/2 application to free up a
                    timer.

ERR23               This driver cannot operate without a cable plugged.

                    The modem does not have a phone line attached.  Plug in the
                    cable and try again.

ERR24               This driver cannot operate without the ISDN cable plugged.

                    The ISDN driver cannot operate without an ISDN cable
                    attached to the adapter. Either the cable is missing, or
                    you have an analog cable attached to the adapter.

ERR25               This driver cannot operate without the ANALOG cable
                    plugged.

                    The ISDN driver cannot operate without an ANALOG cable
                    attached to the adapter. Ensure that you have an analog
                    cable attached.

Interface Status:
The ISDN Data/Fax Modem's main windows contains status indicators.  These
interface stauts indicators are described in Modem LED Indicators.  When a
status indicator light is green, the indicator is On.  When the light is black,
the indicator is OFF.

In addition to the status indicators, the modem user interface provides status
about the state of the connection to the remote modem. The following states are
indicated on the user interface:

Ready          No connection exists.

Dialing        A dial command has been issued but a connection has not been
               completed.

Negotiating    The remote modem has answered and the modems are attempting to
               negotiate a connection.

Connect        The two modems have completed negotiation and a connection has
               been achieved.

When the status is Connect, additional status about the connection is given.
The values given are:

Speed:              The line speed of the connection.  Typically this is 14400,
                    9600, 2400, 1200, or 300 bps.  A value of 16800, 19200,
                    21600, 24000, 26400, and 28000 may also appear for the
                    Data/Fax PCMCIA ISDN or Analog Modem.

Error Correction:   MNP, V.42, or blank (for an asynchronous connection).

Compression:        MNP 5, V.42bis, or blank for no compression.


ΓòÉΓòÉΓòÉ 20. Modem:  Messages and Codes ΓòÉΓòÉΓòÉ

 Modem:  Messages and Codes

The results of AT commands and status information from the Modem DSP software
are reported to the host communications software as result codes and text
messages.  Reporting of the result codes is controlled by the Q:  Quiet command
and the result code format is controlled by the V:  Verbose Response command.
The X:  Extended Results command and the \V:  MNP* Result Codes command
controls which result codes will be used.

Click on AT Result Codes and Messages for a summary of the numeric and text
result codes generated by the AT command set.

Click on Modem LED Indicators for information on visual indicators of the
modem's status.


ΓòÉΓòÉΓòÉ 21. AT Result Codes and Messages ΓòÉΓòÉΓòÉ

 AT Result Codes and Messages


 Numeric    Text Message         Explanation

 0          OK                   Acknowledges the execution of a command.

 1          CONNECT              Indicates that a connection has been established
                                 with a remote modem at a speed of 0-300 bps.

 2          RING                 Indicates that an incoming call has been detected.

 3          NO CARRIER           Indicates a failure to connect (handshaking state)
                                 or a loss of carrier (on-line state).

 4          ERROR                Indicates an error condition in the command buffer
                                 being executed.  Possible causes:

                                 -Invalid command

                                 -Command line too long (exceeds 40 characters)

 5          CONNECT 1200         Indicates that a connection has been established
                                 with a remote modem at a speed of 1200 bps.

 6          NO DIALTONE          Indicates that dial tone detection was attempted
                                 but not recognized.  Enabled by X2 and X4.

 7          BUSY                 Indicates that a busy signal was detected during
                                 the call establishment.  Enabled by X2 and X4.

 8          NO ANSWER            Indicates that the required period of silence was
                                 not detected during the "wait for quiet answer"
                                 time-out period specified by modem register S7.
                                 This occurs when an @ dial modifier is used.

 10         CONNECT 2400         Indicates that a connection has been established
                                 with a remote modem at a speed of 2400 bps.

 15         HOST DRIVER TIMEOUT  Indicates that the PC is not responding to
                                 interrupts from the Data/Fax Modem adapter.

 19         CONNECT ECL          Indicates that a connection has been established
                                 with an error-correcting link, using MNP* or V.42
                                 (indicated in the Modem window).

 20         CONNECT ECLC         Indicates that a connection has been established
                                 with an error-correcting link, with data
                                 compression, using MNP or V.42 bis (indicated in
                                 the Modem window).

 24         DELAYED              Indicates that a connection has been delayed.

 25         CONNECT 1200/ECL     Indicates that a connection has been established
                                 with an error-correcting link, using MNP or V.42
                                 (indicated in the Modem window) at 1200 bps.

 26         CONNECT 1200/ECLC    Indicates that a connection has been established
                                 with an error-correcting link, with data
                                 compression, using MNP or V.42 bis (indicated in
                                 the Modem window) at 1200 bps.

 30         CONNECT 2400/ECL     Indicates that a connection has been established
                                 with an error-correcting link, using MNP or V.42
                                 (indicated in the Modem window) at 2400 bps.

 31         CONNECT 2400/ECLC    Indicates that a connection has been established
                                 with an error-correcting link, with data
                                 compression, using MNP or V.42 (indicated in the
                                 Modem window) at 2400 bps.

 32         BLACKLISTED          Valid only outside the US and Canada. Indicates
                                 that no further calls to this number are allowed.

 33         CONNECT 4800         Indicates that a connection has been established
                                 with a remote modem at a speed of 4800 bps.

 34         CONNECT 4800/ECL     Indicates that a connection has been established
                                 with an error-correcting link, using MNP or V.42
                                 (indicated in the Modem window) at 4800 bps.

 35         CONNECT 4800/ECLC    Indicates that a connection has been established
                                 with an error-correcting link, with data
                                 compression, using MNP or V.42 bis (indicated in
                                 the Modem window) at 4800 bps.

 37         CONNECT 7200         Indicates that a connection has been established
                                 with a remote modem at a speed of 7200 bps.

 38         CONNECT 7200/ECL     Indicates that a connection has been established
                                 with an error-correcting link, using MNP or V.42
                                 (indicated in the Modem window) at 7200 bps.

 39         CONNECT 7200/ECLC    Indicates that a connection has been established
                                 with an error-correcting link, with data
                                 compression, using MNP or V.42 bis (indicated in
                                 the Modem window) at 7200 bps.

 41         CONNECT 9600         Indicates that a connection has been established
                                 with a remote modem at a speed of 9600 bps.

 42         CONNECT 9600/ECL     Indicates that a connection has been established
                                 with an error-correcting link, using MNP or V.42
                                 (indicated in the Modem window) at 9600 bps.

 43         CONNECT 9600/ECLC    Indicates that a connection has been established
                                 with an error-correcting link, with data
                                 compression, using MNP or V.42 bis (indicated in
                                 the Modem window) at 9600 bps.

 45         CONNECT 12000        Indicates that a connection has been established
                                 with a remote modem at a speed of 12000 bps.

 46         CONNECT 12000/ECL    Indicates that a connection has been established
                                 with an error-correcting link, using MNP or V.42
                                 (indicated in the Modem window) at 12000 bps.

 47         CONNECT 12000/ECLC   Indicates that a connection has been established
                                 with an error-correcting link, with data
                                 compression, using MNP or V.42 bis (indicated in
                                 the Modem window) at 12000 bps.

 49         CONNECT 14400        Indicates that a connection has been established
                                 with a remote modem at a speed of 14400 bps.

 50         CONNECT 14400/ECL    Indicates that a connection has been established
                                 with an error correcting link, with data using MNP
                                 or V.42 at 14400 bps.

 51         CONNECT 14400/ECLC   Indicates that a connection has been established
                                 with an error correcting link, with data
                                 compression, using MNP or V.42 at 14400 bps.

 53         CONNECT 16800        Indicates that a connection has been established
                                 with a remote modem at a speed of 16800 bps.

 54         CONNECT 16800/ECL    Indicates that a connection has been established
                                 with an error correcting link, using MNP or V.42
                                 at 16800 bps.

 55         CONNECT 16800/ECLC   Indicates that a connection has been established
                                 with an error correcting link with a data
                                 compression, using MNP or V.42 at 16800 bps.

 57         CONNECT 19200        Indicates that a connection has been established
                                 with a remote modem at a speed of 19200.

 58         CONNECT 19200/ECL    Indicates that a connection has been established
                                 with an error correcting link using MNP or V.42 at
                                 19200 bps.

 59         CONNECT 19200/ECLC   Indicates that a connection has been established
                                 with an error correcting link, with data
                                 compression, using MNP or V.42 at 19200 bps.

 61         CONNECT 21600        Indicates that a connection has been established
                                 with a remote modem at a speed of 21600.

 62         CONNECT 21600/ECL    Indicates that a connection has been established
                                 with an error correcting link,. using MNP or V.42
                                 at 21600 bps.

 63         CONNECT 21600/ECLC   Indicates that a connection has been established
                                 with an error correcting link, with data
                                 compression,. using MNP or V.42 at 21600 bps.

 64         CONNECT 24000        Indicates that a connection has been established
                                 with a remote modem at a speed of 24000 bps.

 65         CONNECT 24000/ECL    Indicates that a connection has been established
                                 with an error correcting link using MNP or V.42 at
                                 24000 bps.

 66         CONNECT 24000/ECLC   Indicates that a connection has been established
                                 with an error correcting link, with data
                                 compression, using MNP or V.42 at 24000 bps.

 67         CONNECT 26400        Indicates that a connection has been established
                                 with a remote modem at a speed of 26400 bps.

 68         CONNECT 26400/ECL    Indicates that a connection has been established
                                 with an error correcting link using MNP or V.42 at
                                 26400 bps.

 69         CONNECT 26400/ECLC   Indicates that a connection has been established
                                 with an error correcting link, with data
                                 compression, using MNP or V.42 at 26400 bps.

 71         CONNECT 28800        Indicates that a connection has been established
                                 with a remote modem at a speed of 28800 bps.

 72         CONNECT 28800/ECL    Indicates that a connection has been established
                                 with an error correcting link using MNP or V.42 at
                                 28800 bps.

 73         CONNECT 28800/ECLC   Indicates that a connection has been established
                                 with an error correcting link, with data
                                 compression, using MNP or V.42 at 28800 bps.

 84         CONNECT 56000        Indicates that a connection has been established
                                 with a remote modem at a speed of 56000 bps.

 85         CONNECT 56000/ECL    Indicates that a connection has been established
                                 with an error correcting link at a speed of at
                                 56000 bps.

 86         CONNECT 56000/ECLC   Indicates that a connection has been established
                                 with an error correcting link, with data
                                 compression, at a speed of 56000 bps.

 88         CONNECT 64000        Indicates that a connection has been established
                                 with a remote modem at a speed of 64000 bps.

 89         CONNECT 64000/ECL    Indicates that a connection has been established
                                 with an error correcting link at a speed of at
                                 64000 bps.

 90         CONNECT 64000/ECLC   Indicates that a connection has been established
                                 with an error correcting link, with data
                                 compression, at a speed of 64000 bps.


ΓòÉΓòÉΓòÉ 22. Hints and Tips for Improved Performance ΓòÉΓòÉΓòÉ

 Hints and Tips for Improved Modem Performance

Blocks Received in Error with Zmodem File Transfer
Low Throughput When Transmitting or Receiving a File
MNP 5 Versus V.42bis Performance
MNP 4 Versus V.42 Performance
Tele-Gaming
Call Waiting
Seeing "Double"


ΓòÉΓòÉΓòÉ 23. Blocks Received in Error with Zmodem File Transfer ΓòÉΓòÉΓòÉ

 Blocks Received in Error with Zmodem File Transfer

Normally with an error-correcting protocol like MNP 4 or V.42, a user would
expect that no frame would be received in error when using a file transfer
protocol like Zmodem or Ymodem.  However, the modem can be delivering data to
the PC so fast that it overruns buffers in the PC and makes it appear to Zmodem
that a data block has been received in error.

You can solve the problem by getting a more efficient communications program or
a faster PC.  You can also solve the problem by using hardware flow control.
Set your application to use hardware flow control and then use the "AT\Q3"
command to turn on hardware flow control in the modem. The advantage of
hardware flow control is that it can compensate for slow or overloaded PCs and
for inefficient applications and will guarantee that no data is lost. The
disadvantage is that you may receive data at a slower rate because the modem is
forced to wait for the PC and the communications software.

If you use hardware flow control, make sure that you set your PC communications
program to use hardware flow control.


ΓòÉΓòÉΓòÉ 24. Low Throughput When Transmitting or Receiving a File ΓòÉΓòÉΓòÉ

 Low Throughput When Transmitting or Receiving a File

In your PC the UART (Universal Asynchronous Receiver Transmitter) is the piece
of hardware that connects your PC to your modem.  Communications software talks
to a OS/2 COM driver that in turn talks to the UART hardware.  The standard COM
driver that comes with OS/2, however, does not take advantage of the
16-byte-deep 16550A UART FIFO. It puts only 2 bytes in the FIFO instead of 16.

You can purchase drivers for OS/2 that will fix this problem. SIO.SYS, one such
product, is available as shareware from the IBM PC Company Bulletin Board
Service at [phone]. Search for SIO145 and download this shareware
version. When you install the driver you will be presented with a registration
screen.

A driver of this type is highly recommended for all operations at 14400 bps
(also know as V.32bis) or higher speeds.


ΓòÉΓòÉΓòÉ 25. MNP 5 Versus V.42bis Performance ΓòÉΓòÉΓòÉ

 MNP 5 versus V.42bis Performance

If you are getting an MNP5 connection, and you are transferring already
compressed files (such as "ZIP" files), you can improve performance by
disabling MNP5 with the "AT%C0" command.  MNP5 will expand compressed files and
will slow down throughput.  V.42bis will not slow down throughput for any kind
of file transfer.

You can disable MNP 5 with the "AT%C0" command.


ΓòÉΓòÉΓòÉ 26. MNP 4 Versus V.42 Perforance ΓòÉΓòÉΓòÉ

 MNP 4 versus V.42bis Performance

Use MNP 4 instead of V.42 to improve throughput.  The MNP4 protocol is 2% more
efficient than the V.42 protocol.  The advantage of V.42 over MNP is that it
can do selective packet rejection.  The ISDN Data/Fax Modem currently does not
support selective packet rejection.  Thus, for the ISDN Data/Fax Modem, MNP 4
is always a marginally better performer.


ΓòÉΓòÉΓòÉ 27. Tele Gaming ΓòÉΓòÉΓòÉ

 Tele-Gaming

If you are using your ISDN Data/Fax Modem for tele-gaming, we recommend the
initialization string: "AT&F\N0."  Most tele-games send tiny packets back and
forth and expect a response from each packet. Using an error-correcting
protocol like MNP or V.42 can add latency in a tele-gaming scenario that will
bring performance of the game down considerably.  With asynchronous data links
(non-error corrected links), latency is reduced significantly.


ΓòÉΓòÉΓòÉ 28. Call Waiting ΓòÉΓòÉΓòÉ

 Call Waiting

Many local telephone companies offer a call waiting service that informs you
when a call is coming in when you are already using the phone line.  You
normally hear a beep in the middle of a conversation.

This service can cause the modem to have low throughput, errors, and even to
disconnect.  When using the modem, disable call waiting.  Contact your local
phone company to determine how to disable call waiting. However, it is
generally done on a per-call basis by preceding your dialing digits with the
digits "*70". So, if you want to set up a dialing string that also disables
call waiting, try "ATDT*70,555-1212" where "555-1212" is the number of the
remote computer to which you wish to connect.  Commas between "*70" and
"555-1212" cause the dialer to pause a few seconds to make sure that the line
is ready for the rest of the dialing digits.


ΓòÉΓòÉΓòÉ 29. Seeing Double ΓòÉΓòÉΓòÉ

 Seeing "Double"

If you see double what you type, you need to change the setup of your
communications program.  Turn local echo off or set it for full-duplex mode.
Refer to the documentation for your communications program to learn how to do
this.


ΓòÉΓòÉΓòÉ 30. AT Command Summary ΓòÉΓòÉΓòÉ

 AT Command Description

Issuing AT Commands
Command Syntax Overview
Dialing Differences for ISDN

A:  Answer
B:  Select Standard
C:  Carrier Control
D:  Dial
E:  Echo
F:  On-line Echo
H:  Hook Control
I:  Info Request
L:  Speaker Volume
M:  Speaker Control
O:  On-line
P:  Pulse Dial
Q:  Quiet
S:  Select Register
T:  Tone Dial
V:  Verbose Response
X:  Extended Results
Y:  Space Disconnect
Z:  Software Reset
,:  Wait
=:  Set Register
?:  Query Register
&C:  Carrier Detect
&D:  DTR Response
&F:  Factory Defaults Command
&G:  Guard Tone
&L:  Leased Line Mode
&M:  Communications Mode
&N:  Force Speed
&P:  Pulse Ratio
&Q:  Comm Mode
&S:  DSR Options
&U:  Enable Trellis Coding
&V:  View Active Configuration And Profiles
&W:  Write Configuration
&Y:  Select Stored Profile On Power Up
&Z:  Store Number
\A:  MNP* Block Size
\B:  Send Break
\K:  Break Control
\L:  MNP* Mode
\N:  V.42 and MNP* Negotiation Behavior
\Q:  Flow Control
\T:  Set Timer
\V:  MNP* Result Codes
%A:  Define Auto Fallback Character
%C:  MNP* Compression Control
%E:  Fast Rate Renegotiation Control
"H:  V.42bis Compression Control
"N:  V.42bis Dictionary Size
"O:  V.42bis Maximum String Length
-J:  V.42 Detection Phase


ΓòÉΓòÉΓòÉ 31. Issuing AT Commands ΓòÉΓòÉΓòÉ

 Issuing AT Commands

After you have started the Data/Fax  Modem by double-clicking the appropriate
icon, it enters the "command state."  It is then ready to accept AT commands.
The modem returns to "command state" whenever a connection is broken.  This
would be the case when the other end hangs up or you issue an ATH0 command.

When a "D" (Dial) or "A" (Answer) command is processed, the modem enters the
"online" state unless the command ends in the ";" (semicolon) character.  In
the online state, all characters sent to the modem are transmitted to the
computer at the other end of the phone line.

Note:  If you need to issue AT commands while in the "online" state, you can
enter the sequence "+++". Your modem will respond with "OK" and you may enter
AT commands.  The connection remains intact, but you are in "command state."
To go back to "online" state, enter "ATO."


ΓòÉΓòÉΓòÉ 32. Command Syntax Overview ΓòÉΓòÉΓòÉ

 Command Syntax Overview

For each AT command, a syntax description will be given.  In that description,
the following conventions are used.

The command prefix is "AT".  This is distinct from the command itself.

An ellipsis, "...", may be replaced by any valid command or command sequence.

"[CR]" is a carriage return.

A bold face "n" represents a numeric value.  A table will follow the syntax
description indicating valid values for "n".


ΓòÉΓòÉΓòÉ 33. Dialing Differences for ISDN ΓòÉΓòÉΓòÉ

 Dialing Differences for ISDN

Calls sent over an ISDN are handled differently than calls sent over an analog
network.  For this reason, you may notice that some dialing modifiers work
differently than they work on your analog modem.  This is because all dialed
digits are sent to the digital network in one block rather than one at a time.
The number to be used when making the network connection is sent on one of two
conditions:

 1. The end of a dialed string is reached.

 2. A delay of 1 second longer than the greater of S8 and S11 has occurred
    since the last-received dialed digit.  (See S-Register Values for
    information on S8 and S11.)

Subsequent digits will be sent out on the B-Channel as dual-tone modulation
frequency (DTMF) tones for user applications, but will not be used to make a
connection.

The differences in dialing might affect the operation of the following dial
modifiers:

P, T   ISDN uses digital call establishment techniques, so neither pulse nor
       DTMF dialing is applicable.  For both dialing modes, DTMF tones are
       generated to help you know how your call is progressing.  After the call
       has been connected, DTMF tones are sent across the line for use by
       automated menu-driven devices that can detect DTMF tones.

@,W    The digits succeeding these modifiers will not be sent out for 1 second
       longer than the greater of S8 or S11 after the preceding digits.  The
       wait associated with the modifier will include this delay.

,      If multiple waits are used in succession and the total wait time is
       greater than 1 second longer than the greater of S8 and S11, the digits
       preceding the wait will be used to make the call.  Subsequent digits
       will go out across the line if a connection is made.  Otherwise, they
       will be lost.

       If dialed digits are put between the ',' modifiers, the delay is reset
       after each digit.

!      This modifier is not supported and will return an ERROR.

*      This modifier is used to denote the subaddress of the number you are
       dialing.  The numbers after the * will be recognized as the subaddress.
       In order for the * to denote the subaddress, it can not be the first
       digit in the dialing string.  For example, in order for the numbers
       after the * to be recognized as the subaddress, it should be placed as
       follows:  919-555-1234*7704.


ΓòÉΓòÉΓòÉ 34. A:  Answer ΓòÉΓòÉΓòÉ

 A       Answer

The A command causes the Data/Fax  Modem to begin the answer process.

Syntax:        AT...A [CR]


ΓòÉΓòÉΓòÉ 35. B:  Select Standard ΓòÉΓòÉΓòÉ

 B       Select Standard

The B command selects the communication standard (ITU-T or BELL) used by the
Data/Fax  Modem at 1200 bps or below.

Syntax:        AT...Bn...[CR]

n              Usage

0,NULL         ITU-T Standard (formerly CCITT); V.21 or V.22

1              Bell Standard; Bell 103J or Bell 212A


ΓòÉΓòÉΓòÉ 36. C:  Carrier Control ΓòÉΓòÉΓòÉ

 C       Carrier Control

The C command enables the transmit carrier.

Syntax:        AT...C1...[CR]


ΓòÉΓòÉΓòÉ 37. D:  Dial ΓòÉΓòÉΓòÉ

 D       Dial

The D command causes the Data/Fax  Modem to enter the dialing state.  The
parenthesis, hyphen, and space characters may be added to the dialed number for
clarity.  Any other characters following the D command that are not dial
modifiers cause a command error.

Syntax:        AT...D {dial modifiers}[CR]

               AT...D {dial modifiers};...[CR]

Dial Modifiers Usage

0-9            Numeric dialing digits

A-D            Alphabetic dialing digits

# *            Special dialing digits

P              Pulse dial

R              Force answer mode

S=n            Dial stored number n, where n=0-3

T              DTMF dial

W              Wait for dial tone

,              Wait for time specified in register S8

!              Perform hook flash

@              Wait for quiet answer

;              Return to command state

Note:  Due to differences between ISDN and analog technology, you may find some
differences between dialing with your ISDN modem and dialing with an analog
modem.  See Dialing Differences for ISDN for more information.


ΓòÉΓòÉΓòÉ 38. E:  Echo ΓòÉΓòÉΓòÉ

 E       Echo

The E command turns command echoing ON and OFF.

Syntax:        AT...En...[CR]

n              Usage

0,NULL         Turns command echoing off

1              Turns command echoing on


ΓòÉΓòÉΓòÉ 39. F:  On-line Echo ΓòÉΓòÉΓòÉ

 F       On-line Echo

The F command is used by some modems to determine whether characters are echoed
to the DTE (the Personal Computer) while the modem is in the on-line state.
The modem does not support the F0 option. However, because the F command may be
issued by older communications software, F1 is supported to ensure backwards
compatibility.

Syntax:        AT...Fn...[CR]

n              Usage

0,NULL         On-line character echo enabled.  Not supported, returns "ERROR."

1              On-line character echo disabled.  Only allowable value.


ΓòÉΓòÉΓòÉ 40. H:  Hook Control ΓòÉΓòÉΓòÉ

 H       Hook Control

The H command causes the modem to take the line on-hook or off-hook.

Syntax:        AT...Hn...[CR]

n              Usage

0,NULL         Places the line on-hook (hangs up) and causes a transition to
               the off-line command state.

1              Takes the line off-hook and turns on the speaker control if
               enabled.


ΓòÉΓòÉΓòÉ 41. I:  Info Request ΓòÉΓòÉΓòÉ

 I       Info Request

The I command presents modem identification information.

Syntax:        AT...In...[CR]

n              Usage

0,NULL         Returns: The speed supported by the COM Driver that you are
               using.

1              Returns: "OK".

2              Returns: "OK".

3              Returns the MWave version.

4              Returns the software version that you are using.


ΓòÉΓòÉΓòÉ 42. L:  Speaker Volume ΓòÉΓòÉΓòÉ

 L       Speaker Volume

The L command controls the volume of the speaker output.

Syntax:        AT...Ln...[CR]

n              Usage

0, NULL        Sets the speaker volume to the minimum level

1              Sets the speaker volume to a low level

2              Sets the speaker volume to a medium level

3              Sets the speaker volume to a high level

Note:  The speaker volume can also be set from the Actions pull-down on the
modem dialog box.


ΓòÉΓòÉΓòÉ 43. M:  Speaker Control ΓòÉΓòÉΓòÉ

 M       Speaker Control

The M command controls the operation of the speaker.

Syntax:        AT...Mn...[CR]

n              Usage

0,NULL         Sets the speaker off.

1              Sets the speaker on until the data carrier is present during the
               handshaking mode.  Then, it is turned off.

2              Sets the speaker always on, even after the data carrier is
               present.

3              Sets the speaker off during dialing and then on until the data
               carrier is detected.


ΓòÉΓòÉΓòÉ 44. O:  On-line ΓòÉΓòÉΓòÉ

 O       On-line

The O command causes the modem to return to the on-line state for a previously
established connection.

Syntax:        AT...On[CR]

n              Usage

0,NULL         Causes the modem to return to the on-line state.


ΓòÉΓòÉΓòÉ 45. P:  Pulse Dial ΓòÉΓòÉΓòÉ

 P       Pulse Dial

The P command causes the modem to use pulse dialing for all subsequent numbers.

Syntax:        AT...P[CR]


ΓòÉΓòÉΓòÉ 46. Q:  Quiet ΓòÉΓòÉΓòÉ

 Q       Quiet

The Q command controls the result codes generated by the modem.

Syntax:        AT...Qn...[CR]

n              Usage

0,NULL         Enables result codes

1              Disables result codes


ΓòÉΓòÉΓòÉ 47. S:  Select Register ΓòÉΓòÉΓòÉ

 S       Select Register

The S command selects one of the modem's internal registers for future
operations. Refer to S- Register Summary, the =:  Set Register command, and the
?:  Query Register command.

Syntax:        AT...S...[CR]

               AT...Sn...[CR]

Note:  N must be in the range 0-34.  If N is omitted, then N=0 is assumed.


ΓòÉΓòÉΓòÉ 48. T:  Tone Dial ΓòÉΓòÉΓòÉ

 T       Tone Dial

The T command causes the modem to use DTMF (tone) dialing for all subsequent
numbers.

Syntax:        AT...T[CR]


ΓòÉΓòÉΓòÉ 49. V:  Verbose Response ΓòÉΓòÉΓòÉ

 V       Verbose Response

The V command controls the display of result codes.

Syntax:        AT...Vn...[CR]

n              Usage

0,NULL         Result codes are returned as digits

1              Result codes are returned as text messages


ΓòÉΓòÉΓòÉ 50. X:  Extended Results ΓòÉΓòÉΓòÉ

 X       Extended Results

The X command enables the call-progress, tone-detection capabilities and
affects the associated result codes.

Syntax:        AT...Xn...[CR]

n              Usage

0,NULL         Busy and dial tone detection are disabled.  Result codes 0-4 are
               enabled.

1              Busy and dial tone detection are disabled.  Result codes 0-4 and
               line-speed reporting via the "CONNECT xxxx" messages are
               enabled.

2              Busy detection is disabled; dial tone detection is enabled.
               Result codes 0-4, 6, and line- speed reporting via the "CONNECT
               xxxx" messages are enabled.

3              Busy detection is enabled; dial tone detection is disabled.
               Result codes 0-4, 7, and line- speed reporting via the "CONNECT
               xxxx" messages are enabled.

4              Busy and dial tone detection are enabled.  Result codes 0-4,
               6-7, and line-speed reporting via the "CONNECT xxxx" messages
               are enabled.


ΓòÉΓòÉΓòÉ 51. Y:  Space Disconnect ΓòÉΓòÉΓòÉ

 Y       Space Disconnect

The Y command controls the long-space disconnect capabilities of the modem.  If
enabled (Y1), when a continuous BREAK of at least 1.6 seconds is received,
disconnect from the line (go on-hook).  When an ATH0 command is received or DTR
goes low, generate a 4-second BREAK before going on-hook.

Syntax:        AT...Yn...[CR]

n              Usage

0,NULL         Disables the long-space disconnect feature

1              Enables the long-space disconnect feature


ΓòÉΓòÉΓòÉ 52. Z:  Software Reset ΓòÉΓòÉΓòÉ

 Z       Software Reset

The Z command causes the modem to reload a stored profile.

Syntax:        AT...Zn[CR]

n              Usage

0,NULL         Recall stored profile 0.

1              Recall stored profile 1.

2              Recall factory defaults  (See the &F:  Factory Defaults
               Command).


ΓòÉΓòÉΓòÉ 53. ,:  Wait ΓòÉΓòÉΓòÉ

 ,       Wait

The comma (,) command causes the modem to wait for the time specified by the
contents of register S8 in seconds before processing any more characters in the
command buffer.

Syntax:        AT... , ...[CR]


ΓòÉΓòÉΓòÉ 54. =:  Set Register ΓòÉΓòÉΓòÉ

 =       Set Register

The = command is used to set the value of the modem's internal registers
S0-S34.  Refer to S- Register Summary and the ?:  Query Register command.

The = command is usually coupled with the Sn command and is invoked as follows:

AT...S3=13...[CR]

If the = command is not coupled with the Sn command, then the previously
selected register will be written.  Some registers cannot be written by the
user.  An "ERROR" message will result for these registers.

Syntax:        AT...Sn=x...[CR]

               AT...=x...[CR]

Note:  n is a number from 0-34 and x is a number from 0- 255.


ΓòÉΓòÉΓòÉ 55. ?:  Query Register ΓòÉΓòÉΓòÉ

 ?       Query Register

The ? command is used to read the value of the modem's internal registers
S0-S34.
Refer to S-Register Summary and the =:  Set Register command.

The following is an example of using the ? command to read the S0 internal
register:

AT...S0?...[CR]

If the ? command is not coupled with the Sn command, then the previously
selected register will be read.

Syntax:        AT...Sn?[CR]

               AT...?...[CR]

Note:  n is a number from 0-34.  The result is a number from 000-255.


ΓòÉΓòÉΓòÉ 56. &C:  Carrier Detect ΓòÉΓòÉΓòÉ

 &C       Carrier Detect

The &C command determines how the carrier-detect signal is generated by the
modem.  The carrier-detect signal is present in the UART register (called the
Modem Status Register).

Syntax:        AT...&CN...[CR]

n              Usage

0,NULL         The state of the remote modem's carrier is ignored.  The carrier
               detect flag is always on.

1              The state of the remote modem's carrier is detected by the modem
               and reflected by the state of the carrier-detect status bit in
               the Modem Status Register.


ΓòÉΓòÉΓòÉ 57. &D:  DTR Response ΓòÉΓòÉΓòÉ

 &D       DTR Response

The &D command controls the modem's response to the Data Terminal Ready (DTR)
control bit.

Syntax:        AT...&Dn...[CR]

n              Usage

0,NULL         Ignores DTR.

1              Return to command state when ON-to-OFF transition is detected on
               DTR.

2              Hang-up, disable auto-answer, and return to command state when
               ON-to-OFF transition is detected on DTR.

3              Perform a software reset when ON-to-OFF transition is detected
               on DTR.  The last recalled profile is restored.


ΓòÉΓòÉΓòÉ 58. &F:  Factory Defaults Command ΓòÉΓòÉΓòÉ

 &F       Factory Defaults Command

The &F extended command tells the modem to load the factory defaults into the
internal registers and control variables.

Syntax:        AT...&F....[CR]

Note:  The factory default S-Register settings are:

S0=0  S2=43  S3=13  S4=10  S5=8  S6=2  S7=30 S8=2  S9=6  S10=14  S11=70  S12=50
S25=5  S28=0

These values are not mapped in the S registers.  However, when an &F is
executed, the following values will be set:

\A4  \K3  \L0  \N7  \Q0  \T0  %C1  %A0  %E2  "H3  "N1  "O32  &N0

The following control variable settings correspond to an S register listed
above.  When an &F is executed, their effective value will be restored as
follows:

B1  F1  P  Y0  &D2  &P0  &S0  C1  L2  Q0  X4  &G0  &Q0  E1  M1  V1  &C1 &M0
\V1  &U0


ΓòÉΓòÉΓòÉ 59. &G:  Guard Tone ΓòÉΓòÉΓòÉ

 &G       Guard Tone

The &G extended command controls the guard-tone selection for the V.22bis
datapump.  The guard tones are generated during the handshaking process when
the modem is in answer mode.

Syntax:        AT...&Gn...[CR]

n              Usage

0,NULL         Disables the V.22bis guard tones

2              Enables the 1800-Hz, V.22bis guard tone


ΓòÉΓòÉΓòÉ 60. &L:  Leased Line Mode ΓòÉΓòÉΓòÉ

 &L       Leased-Line Mode

The modem is designed to work only on the public switched telephone network
(PSTN).  Support for leased- line operation is not  provided.

Syntax:        AT...&Ln...[CR]

n              Usage

0,NULL         Selects switched-network line mode


ΓòÉΓòÉΓòÉ 61. &M:  Communications Mode ΓòÉΓòÉΓòÉ

 &M       Communications Mode

The &M extended command selects the communications mode.  An &M0 (asynchronous)
mode is supported for the Data/Fax  Modem only.

Syntax:        AT...&Mn...[CR]

n              Usage

0,NULL         Selects asynchronous communications


ΓòÉΓòÉΓòÉ 62. &N:  Force Speed ΓòÉΓòÉΓòÉ

 &N       Force Speed

The &N extended command selects the force speed mode.  This command applies to
V.32bis (14400 bps) and V.34 (28800 bps PCMCIA analog) modems only.  It is
ignored by the V.22bis (2400 bps) modem.  This command will force the modem to
connect at the speed specified in the S28 register.

If &N1 is specified and S28 contains a non-0 value, then the modem will connect
at the speed specified by the S28 register.

If &N1 is specified and S28 contains zero (S28=0), then the modem will connect
at the speed specified by the UART port speed, which is generally set by the
application program.  If the port speed is set higher than the maximum
supported line rate (for example, setting a port speed of 19,200 bps while
using the V.32bis modem, which has a maximum line speed of 14,400 bps) then the
modem will connect at the maximum supported line rate.

If &N0 is specified, the modem will connect at the maximum allowable rate as
specified in the description of the S28 register.  S-Register Values contains
details on each of the S-registers.  For general information on the
S-registers, see S-Register Summary.

Syntax:        AT...&Nn...[CR]

n              Usage

0,NULL         Support Maximum Allowable Rate

1              Force Rate


ΓòÉΓòÉΓòÉ 63. &P:  Pulse Ratio ΓòÉΓòÉΓòÉ

 &P       Pulse Ratio

The &P command is present for compatibility purposes.  It does not change the
make/break ratios.

Syntax:        AT...&Pn...[CR]

n              Usage

0,NULL         Returns "OK", but has no affect on timings

1              Returns "OK", but has no affect on timings


ΓòÉΓòÉΓòÉ 64. &Q:  Comm Mode ΓòÉΓòÉΓòÉ

 &Q       Comm Mode

The &Q extended command selects the communications mode.  For the modem, only
&Q0 (asynchronous) mode is supported.

Syntax:        AT...&Qn...[CR]

n              Usage

0,NULL         Selects asynchronous communications


ΓòÉΓòÉΓòÉ 65. &S:  DSR Options ΓòÉΓòÉΓòÉ

 &S       DSR Options

The &S extended command controls the operation of the DSR status bit.  The DSR
status is found in the UART Modem Status Register.

Syntax:        AT...&Sn...[CR]

n              Usage

0,NULL         DSR is always ON while the modem is loaded.

1              DSR is turned on just after handshaking has been completed and
               is turned OFF when the hang-up process is started.


ΓòÉΓòÉΓòÉ 66. &U:  Enable Trellis Codeing ΓòÉΓòÉΓòÉ

 &U       Enable Trellis Coding

The &U extended command enables or disables the trellis-coded data scheme in
V.32bis modems.  It has no effect on other datapumps.  If issued while the
modem is in the online command state, the &U command does not take effect until
the next connection is established.

Syntax:        AT...&Un...[CR]

n              Usage

0,NULL         Enable Trellis coding in V.32bis

1              Disable Trellis coding in V.32bis


ΓòÉΓòÉΓòÉ 67. &V:  View Active Configuration And Profiles ΓòÉΓòÉΓòÉ

 &V       View Active Configuration And Profiles

The &V extended command displays active and stored profiles and stored
telephone numbers. Inputs from the DTE are ignored while the view information
is being sent to the DTE.

Syntax:        AT...&Vn...[CR]

The following is an example of the data output format:

ACTIVE PROFILE:
&Yn En Qn Vn \Vn P &Dn &Cn &Sn Yn Ln Mn Xn &G B &U \An \Kn \Ln \Nn \Qn \Tn %An
%Cn %En "Hn "Nn "On
S0=nn S2=nn S3=nn S4=nn S5=nn S6=nn S7=nn S8=nn S9=nn S10=nn S11=nn S12=nn
S25=nn S28=nn

STORED PROFILE 0:
En Qn Vn \Vn P &Dn &Cn &Sn Yn Ln Mn Xn &G B &U \An \Kn \Ln \Nn \Qn \Tn %An %Cn
%En "Hn "Nn "On
S0=nn S2=nn S3=nn S4=nn S5=nn S6=nn S7=nn S8=nn S9=nn S10=nn S11=nn S12=nn
S25=nn S28=nn

STORED PROFILE 1:
En Qn Vn \Vn P &Dn &Cn &Sn Yn Ln Mn Xn &G B &U \An \Kn \Ln \Nn \Qn \Tn %An %C
%En "Hn "Nn "On
S0=nn S2=nn S3=nn S4=nn S5=nn S6=nn S7=nn S8=nn S9=nn S10=nn S11=nn S12=nn
S25=nn S28=nn

TELEPHONE NUMBERS:
PHONE0=nn
PHONE1=nn
PHONE2=nn
PHONE3=nn


ΓòÉΓòÉΓòÉ 68. &W:  Write Configuration ΓòÉΓòÉΓòÉ

 &W       Write Configuration

The &W extended command saves the active modem configuration.  The following
registers are saved in nonvolatile storage: S0, S2, S3, S4, S5, S6, S7, S8, S9,
S10, S11, S12, S14, S18, S21, S22, S23, S25, S27, S28.  In addition, the
following command parameters are stored: \A, \K, \L, \N, \T, %A, %C "Hn "Nn
"On.  The initial value of each of these profiles is defined by the &F:
Factory Defaults Command.

Syntax:        AT...&Wn...[CR]

n              Usage

0,NULL         Store profile 0

1              Store profile 1


ΓòÉΓòÉΓòÉ 69. &Y:  Select Stored Profile On Power Up ΓòÉΓòÉΓòÉ

 &Y       Select Stored Profile On Power-Up

The &Y extended command determines which stored profile is established upon
modem power-up or hard reset.

Syntax:        AT...&Yn...[CR]

n              Usage

0,NULL         Select stored profile 0 on power-up

1              Select stored profile 1 on power-up

2              Select factory defaults on power-up


ΓòÉΓòÉΓòÉ 70. &Z:  Store Number ΓòÉΓòÉΓòÉ

 &Z       Store Number

The &Z extended command saves up to four separate Phone Numbers (dial strings)
to permanent storage.  The &Z command may be followed by the dial string (36
character maximum) or be of the form &Zn=dial string, where n  is in the range
0-3.  n is the identifier for the phone number to save.  This command may not
be followed by additional commands.

Syntax:        AT...&Z {dial modifiers}[CR]

               AT...&ZN= {dial modifiers}[CR]

Dial Modifiers Usage

0-9            Numeric dialing digits

A-D            Alphabetic dialing digits

# *            Special dialing digits

P              Pulse dial

R              Force answer mode

T              DTMF dial

W              Wait for dial tone

,              Wait for time specified in register S8

!              Perform hook flash

@              Wait for quiet answer

;              Return to command state after number has been dialed

Note:  Due to differences between ISDN and analog technology, you may find some
differences between dialing with your ISDN modem and dialing with an analog
modem.  See Dialing Differences for ISDN for more information.


ΓòÉΓòÉΓòÉ 71. \A: MNP** Block Size ΓòÉΓòÉΓòÉ

 \A       MNP* Block Size

The \A extended command sets the maximum MNP* stream mode block size to be used
by the modem during an MNP session.

Syntax:        AT...\An...[CR]

n              Usage

0,NULL         Negotiates for a maximum block size of 64 bytes and uses a
               fixed block size of 64 bytes.

1              Negotiates for a maximum block size of 256 bytes, but uses a
               fixed block size of 128 bytes.

2              Negotiates for a maximum block size of 256 bytes, but uses a
               fixed block size of 192 bytes.

3              Negotiates for a maximum block size of 256 bytes and uses a
               fixed block size of 256 bytes.

4              Negotiates for a maximum of 256 bytes, but uses variable size
               blocks during the MNP session.


ΓòÉΓòÉΓòÉ 72. \B:  Send Break ΓòÉΓòÉΓòÉ

 \B       Send Break

The \B extended command causes the modem to transmit a break signal.  This
command is valid only in on-line command mode.

Syntax:        AT...\B...[CR]


ΓòÉΓòÉΓòÉ 73. \K:  Break Control ΓòÉΓòÉΓòÉ

 \K       Break Control

The \K command controls the actions to be taken by the modem upon reception of
a break signal from either the DTE or a remote modem.  The DTE might generate a
break either through the UART hardware or by using the \B command.  Parameters
1-3 generate identical behavior for a non-ECL connection.  The default is \K3.

Syntax:        AT...\Kn...[CR]

n              Usage

0,NULL         When a break is received from the DTE and the modem is online,
               the modem enters the escaped state and issues a nondestructive
               break to the remote modem.  When a break is  received from the
               remote modem, it is reported immediately and is nondestructive
               to any buffered data.

1              Breaks cause destruction of any buffered data, and they are
               reported immediately.  The escaped state is not entered when  a
               break is received from the DTE.

2              Breaks are nondestructive and the break is reported immediately.
               The escaped state is not entered when a break is received from
               the DTE.

3              Breaks are nondestructive and the break is queued in sequence
               with any buffered data and reported in turn.  The  escaped state
               is not entered when a break is received from the DTE.


ΓòÉΓòÉΓòÉ 74. \L:  MNP** Mode ΓòÉΓòÉΓòÉ

 \L       MNP* Mode

The \L extended command selects MNP* stream mode or block mode to be used by
the modem during an MNP session.  The mode may not be changed once an MNP is
established.

Syntax:        AT...\Ln...[CR]

n              Usage

0,NULL         Stream mode (variable size based on \A command)

1              Block mode (maximum block size)


ΓòÉΓòÉΓòÉ 75. \N:  V.42 and MNP** Negotiation Behavior ΓòÉΓòÉΓòÉ

 \N       V.42 and MNP* Negotiation Behavior

The \N extended command selects the MNP* and V.42/V.42bis operational behavior.
Whenever an Error Corrected Link (ECL) is established, the session will attempt
to get a compressed link if possible. A V.42bis compressed link will be
attempted first.  If that fails or if an "H (V.42 bis Compression Control)
command has been issued, then an MNP5 compressed link will be attempted.  If
that fails or if a %C (MNP Compression Control) command has been issued, a non-
compressed link will be established.

Syntax:        AT...\Nn...[CR]

n              Usage

0,NULL         MNP is disabled.

1              Reserved.  Returns "ERROR".

2              Enables MNP, and only an ECL connection is acceptable.  If  the
               MNP negotiations fail or the auto fallback character is
               received, then hang up.

3              Enables MNP and falls back to a non-ECL connection if  the MNP
               negotiations fail or the auto fallback character is received.

4              Enables V.42 error correction, and only a V.42 ECL connection is
               acceptable.  If the V.42 negotiations fail, then hang up.

5              Enables V.42 error correction and falls back to a non-ECL
               connection if the V.42 negotiations fail.

6              Enables V.42 error correction and falls back to an MNP
               connection if the V.42 negotiations fail.  If MNP negotiations
               fail, then hang up.

7              Enables V.42 error correction and falls back to an MNP
               connection if the V.42 negotiations fail.  If the MNP
               negotiations fail or the auto fallback character is received,
               then fall back to a non-ECL connection.


ΓòÉΓòÉΓòÉ 76. \Q:  Flow Control ΓòÉΓòÉΓòÉ

 \Q       Flow Control

The \Q command selects the flow-control method that your modem provides to your
application. This prevents applications from losing data if the application
cannot extract data from the modem as fast as it is being transmitted by the
remote end of the communications link.

Note:  CTS Flow control is not used in the modem because it is not possible to
overrun Mwave internal buffers.  Applications can specify CTS hardware flow
control, but the modem will never drop CTS because internal receive overruns
cannot happen in the modem.

Syntax:        AT...\Qn...[CR]

n              Usage

0,NULL         Flow Control Disabled.

1              Returns ERROR.

2              Returns ERROR.

3              Use the RTS (Request to Send) signal for bi-directional hardware
               flow control.  When the application turns RTS off, the modem
               stops transmitting data to the personal computer in which the
               modem is contained.  When RTS is on, the modem resumes sending
               data.


ΓòÉΓòÉΓòÉ 77. \T:  Set Timer ΓòÉΓòÉΓòÉ

 \T       Set Timer

The \T extended command controls the operation of the inactivity timer.

Syntax:        AT...\Tn...[CR]

n              Usage

0,NULL         The timer is disabled

1-90           The timer is set to 1-90 minutes


ΓòÉΓòÉΓòÉ 78. \V:  MNP** Result Codes ΓòÉΓòÉΓòÉ

 \V       MNP* Result Codes

The \V extended command enables result codes of the form CONNECT xxxx/ECL.

Syntax:        AT...\Vn...[CR]

n              Usage

0,NULL         Disables MNP* result codes

1              Enables MNP result codes


ΓòÉΓòÉΓòÉ 79. %A:  Define Auto Fallback Character ΓòÉΓòÉΓòÉ

 %A       Define Auto Fallback Character

The %A extended command defines a character to be used to abort the MNP*
negotiation process. The auto fallback character is a 7-bit character with no
parity.  The auto fallback character should not be set to the ASCII SYN
character (decimal 22).  Doing so, causes the MNP negotiation to be aborted for
valid MNP frames.  The default is %A0, which disables the auto fallback
feature.

Syntax:        AT...%An...[CR]

n              Usage

0-127          Defines the ASCII decimal code to be used as the auto fallback
               character by MNP.


ΓòÉΓòÉΓòÉ 80. %C:  MNP** Compression Control ΓòÉΓòÉΓòÉ

 %C       MNP* Compression Control

The %C extended command controls the data compression to be negotiated for in
MNP* class 5. This command may be issued at anytime, but will only take effect
at the establishment of the next connection.

Syntax:        AT...%Cn...[CR]

n              Usage

0,NULL         No data compression

1              Data compression is enabled for MNP class 5


ΓòÉΓòÉΓòÉ 81. %E:  Fast Rate Renegotiation Control ΓòÉΓòÉΓòÉ

 %E       Fast Rate Renegotiation Control

The %E command controls the modem's response to a change in line quality and to
requests for retrain or fallback/fall forward by the other end.  This command
affects only V.32bis and V.34.  When %E2 is active, the modem monitors the line
quality.  When line quality is insufficient to sustain the current connect
speed, the modem will initiate a rate renegotiation to a lower speed within the
V.32bis modulation speeds (4800, 7200, 9600, 12,000, and 14,400 bps).  The
modem will keep falling back as needed until the speed reaches 4800 bps.  If
the line quality deteriorates further while connected at 4800 bps, the modems
will hangup the telephone line.

If the quality of the line increases, the modem will initiate a rate
renegotiation to a higher speed if the modem currently has a V.32bis connection
with the modem at the other end of the phone line.  The rate renegotiation will
be done without a retrain in this case.

The modem will not increase the line speed if the modem is connected via V.32
to the other end of the phone line.  Fall forward via Fast Rate Renegotiation
is not supported in the V.32 specification.

Syntax:        AT...%En...[CR]

n              Usage

0,Null         Disable Auto-Retrain and Fast Rate Renegotiation

1              Enable Auto-Retrain

2              Enable Fast Rate Renegotiation and Auto-Retrain


ΓòÉΓòÉΓòÉ 82. H:  V.42bis Compression Control ΓòÉΓòÉΓòÉ

 "H       V.42bis Compression Control

The "H extended command controls the data compression to be negotiated for with
V.42bis.  This command may be issued at any time but will take effect only at
the next connection.

Syntax:        AT..."Hn...[CR]

n              Usage

0,NULL         V.42bis Disabled

1              V.42bis enabled for transmission only

2              V.42bis enabled for reception only

3              V.42bis enabled for both transmission and reception


ΓòÉΓòÉΓòÉ 83. N:  V.42bis Dictionary Size ΓòÉΓòÉΓòÉ

 "N       V.42bis Dictionary Size

The "N extended command controls the dictionary size to be negotiated for with
V.42bis.  This command may be issued at any time but will take effect only on
the next connection.

Syntax:        AT..."Nn...[CR]

n              Usage

0,NULL         512 Entries

1              1024 Entries


ΓòÉΓòÉΓòÉ 84. O:  V.42bis Maximum String Length ΓòÉΓòÉΓòÉ

 "O       V.42bis Maximum String Length

The "O extended command controls the maximum string length to be negotiated for
with V.42bis. This command may be issued at anytime, but will take effect only
on the next connection.

Syntax:        AT..."On...[CR]

n              Usage

32,NULL        32 character maximum string length

6..250         6 to 250 character maximum string length


ΓòÉΓòÉΓòÉ 85. -J:  V.42 Detection Phase ΓòÉΓòÉΓòÉ

 -J       V.42 Detection Phase

The -J command disables or enables the V.42 detection phase.

Syntax:        AT...-Jn...[CR]

n              Usage

0              V.42 detection phase disabled

1              V.42 detection phase enabled


ΓòÉΓòÉΓòÉ 86. S-Register Summary ΓòÉΓòÉΓòÉ

 S-Register Summary

The modem's internal S-Registers are an extension to the control provided by
the AT Command Set.  The S- Registers are controlled by the AT = (Set Register)
and ? (Query Register) commands.  The Set Register command is used to set the
value of the modem's internal registers and the Query Register command is used
to read the value of those internal registers.

Click on S-Register Values for a summary of the internal S-registers, their
default, range, units, and usage.


ΓòÉΓòÉΓòÉ 87. S-Register Values ΓòÉΓòÉΓòÉ

 S-Register Values


       Default Range      Units           Description

 S0    0       0-255      Number of rings Ring Answer:  S0 contains an integer
                                          representing the number of rings to allow
                                          before going off- hook (when in auto
                                          answer-mode).  When S0 contains zero, the
                                          Modem DSP will not answer.

 S1    0       0-255      Number of rings Ring Count:  S1 contains the ring count.

 S2    43      0-255      ASCII Character Escape Character:  S2 contains the ASCII code
                                          for the escape character.  If S2 contains a
                                          value greater than 127, then the escape
                                          sequence is disabled.  The default 043 is the
                                          "+" character.

 S3    13      0-127      ASCII Character Carriage Return Character:  S3 contains the
                                          ASCII code for carriage return.  The character
                                          contained in S3 is used for the command line
                                          terminator and for output the line terminator.

 S4    10      0-127      ASCII Character Line Feed Character:  S4 contains the ASCII
                                          code for line feed.  The character contained
                                          in S4 is used for the output line terminator
                                          for text output in Verbose mode.

 S5    8       0-32       ASCII Character Backspace Character:  S5 contains the ASCII
                                          code for the backspace character.  The
                                          character contained in S5 is used for editing
                                          an input line and is echoed back to the DTE to
                                          overwrite a character.

 S6    2       2-255      seconds         Blind Dial Wait Time:  S6 contains the amount
                                          of time to wait (in seconds) after going
                                          off-hook, before dialing.  This allows time
                                          for a dial tone to be applied to the line.

 S7    30      1-255      seconds         Carrier Wait Time:  S7 contains the amount of
                                          time to wait for a data carrier.  If a carrier
                                          is detected, a "CONNECT" result is returned;
                                          otherwise, a "NO CARRIER" result occurs.

 S8    2       0-255      seconds         Comma Wait Time:  S8 contains the amount of
                                          time to wait for a comma command or dial
                                          modifier. This register has special
                                          implications for ISDN.

 S9    6       1-255      1/10 seconds    Carrier Recovery Time:  S9 contains the amount
                                          of time to wait between a return of the
                                          carrier in the on-line state and the
                                          acceptance of the carrier.

 S10   14      1-255      1/10 seconds    Lost Carrier Hang-Up Time:  S10 contains the
                                          amount of time to wait between loss of the
                                          carrier and hang-up.

 S11   95      50-255     milli- seconds  DTMF Dialing Speed:  S11 contains the duration
                                          and inter-digit delay for DTMF tone dialing.
                                          This register has special implications for
                                          ISDN.

 S12   50      0-255      1/50 seconds    Escape Code Guard Time:  S12 contains the
                                          guard time delay for recognition of the escape
                                          sequence.

 S25   5       0-255      1/10 seconds    Delay to DTR:  S25 specifies the delay time
                                          threshold for which DTR must be active in
                                          order to be recognized.  If DTR remains at a
                                          state for less than S25/100 seconds, it is
                                          ignored.

 S28   0       0-20       na              Desired Line Speed Control Register:  S28
                                          contains the user's desired line connection
                                          speed.  The connection speed will be the
                                          maximum speed supported by both modems not
                                          exceeding the speed specified by this
                                          register.

                                          00=Use the UART divisor latch setting to
                                          determine the rate to attempt the connection
                                          with the remote modem.

                                          01=Request a 50-bps connection using Bell
                                          103/V.21 protocol.

                                          02=Request a 75-bps connection using Bell
                                          103/V.21 protocol.

                                          03=Request a 110-bps connection using Bell
                                          103/V.21 protocol.

                                          04=Request a 134.5-bps connection using Bell
                                          103/V.21 protocol.

                                          05=Request a 150-bps connection using Bell
                                          103/V.21 protocol.

                                          06=Request a 300-bps connection using Bell
                                          103/V.21 protocol.

                                          07=Reserved.

                                          08=Request a 1200-bps connection modem using
                                          V.22bis/Bell-212 protocol.

                                          09=Request a 2400-bps connection using V.22bis
                                          protocol.

                                          10=Request a 4800-bps connection using V.32bis
                                          protocol.

                                          11=Request a 7200-bps connection using V.32bis
                                          protocol.

                                          12=Request a 9600-bps connection using V.32bis
                                          protocol.

                                          13=Request a 12,000-bps connection using
                                          V.32bis protocol.

                                          14=Request a 14,000-bps connection using
                                          V.32bis protocol.

                                          15=Request a 16,800-bps connection using V.34
                                          protocol.

                                          16=Request a 19,200-bps connection using V.34
                                          protocol.

                                          17=Request a 21,600-bps connection using V.34
                                          protocol.

                                          18=Request a 24,000-bps connection using V.34
                                          protocol.

                                          19=Request a 26,000-bps connection using V.34
                                          protocol.

                                          20=Request a 28,000-bps connection using V.34
                                          protocol.

                                          Note: If the requested protocol is not loaded
                                          (V22,  V32bis), the connection will be made at
                                          or below the request speed.  The values for 15
                                          - 20 apply to the Data/Fax PCMCIA Modem only.

 S30   1       0-14       None            V.34 Options:  Disables the V.34 data pump at
                                          speeds above 14,400-bps and enables the V.32
                                          bis modem.

                                          00=Disable call indicator.

                                          01=Disable V.8.

                                          02= Disable V.34.

                                          03-07 - Reserved.

 S31   0       0-15       None            V.34 Symbol Rates:  Controls the symbol rate
                                          used by the V.34 data pump.

                                          00=Disable 2400 baud symbol rate (receive).

                                          01=Disable 2743 baud symbol rate (receive).

                                          02=Disable 2800 baud symbol rate (receive).

                                          03=Disable 3000 baud symbol rate (receive).

                                          04=Disable 3200 baud symbol rate (receive).

                                          05=Disable 3249 baud symbol rate (receive.

                                          06=Disable asymmetric symbol rates.

                                          07-15=Reserved.

 S32   0       0-15       None            V.34 Symbol Rate Selection (bit-mapped):
                                          Reserved.

 S33   1       0-15       None            V.34 Options (bit-mapped):  Controls various
                                          features of the V.34 data pump.

                                          00=Disable asymmetric rates for V.34.

                                          01=Disable auxilary channel for V.34.

                                          02-07=Reserved.

                                          08=Disable power reduction.

                                          09=Disable pre-emphasis.

                                          10=Disable constellation warping.

                                          11=Disable constellation shaping.

                                          12=Disable precoding.

                                          13-15=Reserved.

 S34   0       0-7        None            V.34 Setting for Signal Processing Features
                                          (bit-mapped):

                                          Controls the signal processing features used
                                          by the V.34 data pump.

                                          00=Disable requests for power reduction.

                                          01=Disable requests for pre-emphasis.

                                          02=Disable requests for constelleation
                                          warping.

                                          03=Disable requests for constellation shaping.

                                          04=Disable requests for precoding.

                                          05-07=Reserved.


ΓòÉΓòÉΓòÉ 88. Modem LED Indicators ΓòÉΓòÉΓòÉ

 Modem LED Indicators

The Modem LED Indicators provide a visual status of the modem's operation.
When lighted (ON), each LED indicator signals a specific operation or state
that the modem is engaged in.


ΓòÉΓòÉΓòÉ 89. Modem Ready (MR) ΓòÉΓòÉΓòÉ

 Modem Ready

The Modem Ready (MR) LED indicates that communication is active.  This light
should be on at all times after the modem is initialized.


ΓòÉΓòÉΓòÉ 90. Data Terminal Ready (DTR) ΓòÉΓòÉΓòÉ

 Data Terminal Ready

The Data Terminal Ready (DTR) LED indicates that the communication application
is active.


ΓòÉΓòÉΓòÉ 91. Send Data (SD) ΓòÉΓòÉΓòÉ

 Send Data

The Send Data (SD) LED indicates that the modem is transferring data from your
computer to the remote system.  When data is being transferred at fast data
rates, the light may appear to be ON steadily.


ΓòÉΓòÉΓòÉ 92. Receive Data (RD) ΓòÉΓòÉΓòÉ

 Receive Data

The Receive Data (RD) LED indicates that the modem is receiving data from a
remote system.  When data is being received at fast data rates, the light may
appear to be ON steadily.


ΓòÉΓòÉΓòÉ 93. Off Hook (OH) ΓòÉΓòÉΓòÉ

 Off-Hook

The Off-Hook (OH) LED indicates that the modem's phone line is off-hook (in
use).


ΓòÉΓòÉΓòÉ 94. Carrier Detect (CD) ΓòÉΓòÉΓòÉ

 Carrier Detect

The Carrier Detect (CD) LED indicates that the modem has detected a remote
modem's carrier signal.


ΓòÉΓòÉΓòÉ 95. Auto Answer (AA) ΓòÉΓòÉΓòÉ

 Auto Answer

The Auto Answer (AA) LED indicates that the modem is set up to automatically
answer incoming calls.


ΓòÉΓòÉΓòÉ 96. High Speed (HS) ΓòÉΓòÉΓòÉ

 High Speed

The High Speed (HS) LED indicates that the modem is set up to connect at a line
speed greater than 2400 bps.


ΓòÉΓòÉΓòÉ 97. Help for ISDN Port Configuration ΓòÉΓòÉΓòÉ

 ISDN Port Configuration Help

Euro-ISDN Network Attachment
North American Network Attachment
1TR6/EURO Network Attachment
INS-NET64 Network Attachment


ΓòÉΓòÉΓòÉ 98. Parameters for Euro-ISDN Network Attachment ΓòÉΓòÉΓòÉ

 Parameters for Euro-ISDN Network Attachment

ISDN Subscriber Number
Adapter Passive Bus Incoming Call Selection
Adapter Passive Bus Address
D-Channel ISDN Signalling TEI Mode
D-Channel ISDN Signalling TEI Value


ΓòÉΓòÉΓòÉ 99. Parameters for North American Network Attachment ΓòÉΓòÉΓòÉ

 Parameters for North American Network Attachment

Switch Configuration Type

   AT&T 5ESS Custom
   Northern Telecom DMS100
   National ISDN 1

Phone Numbers

   1 Phone Number
   2 Phone Numbers
   Phone Number 1
   Phone Number 2

Service Profile ID (SPID)
Terminal Endpoint Identifier (TEI)

   Auto TEI
   Fixed TEI

Grade of Service

   CSV/D Voice and Data
   CSD Data Only
   CSV Voice Only


ΓòÉΓòÉΓòÉ 100. Parameters for 1TR6/EURO Network Attachment ΓòÉΓòÉΓòÉ

 Parameters for 1TR6/EURO Network Attachment

1TR6

ISDN Subscriber Number
Passive Bus Terminal Call Selection
Passive Bus Terminal Selection Digit

EURO

ISDN Subscriber Number
Adapter Passive Bus Incoming Call Selection
Adapter Passive Bus Address
D-Channel ISDN Signalling TEI Mode
D-Channel ISDN Signalling TEI Value


ΓòÉΓòÉΓòÉ 101. Parameters for INS-NET64 Network Attachment ΓòÉΓòÉΓòÉ

 Parameters for INS-NET64 Network Attachment

ISDN Subscriber Number
Adapter Passive Bus Incoming Call Selection
Adapter Passive Bus Address
D-Channel ISDN Signalling TEI Mode
D-Channel ISDN Signalling TEI Value


ΓòÉΓòÉΓòÉ 102. Save ISDN Port Configuration ΓòÉΓòÉΓòÉ

 Save Configuration

The Save Configuration window allows you to save the parameters that you
defined for your port connection, enable multiple configurations, and select
which configuration to use.

If you:

ΓêÖ  Do not have a need for multiple configurations, you can select OK to save
the parameters that you defined for you port connection.
ΓêÖ  Select Enable Multiple Configurations and click on OK, you will be presented
with the Select Configuration window.  From the Select Configuration window,
you can create new configurations.
ΓêÖ  Select Use this Configuration Now (valid only with Enable Multiple
Configurations) and click on OK,  the configuration that you selected will
become effective when you start your port connection.


ΓòÉΓòÉΓòÉ 103. Multiple Configurations ΓòÉΓòÉΓòÉ

 Multiple Configurations

Enabling Multiple Configurations from the Save Configuration window, allows you
to define and assign names to more than one configuration for various port
connections.  A common application for having more than one port configuration
would be where you need one set of parameters defining your port connection at
work, and another set of parameters defining your port connection at home.


ΓòÉΓòÉΓòÉ 104. Select ISDN Port Configuration ΓòÉΓòÉΓòÉ

 Select Configuration

If you enabled multiple configurations during port configuration, the Select
Configuration window provides you with the following options:

ΓêÖ  Use Selected Configuration
ΓêÖ  Edit Selected Configuration
ΓêÖ  Create New Configuration
ΓêÖ  Delete Selected Configuration

If your connection needs change after your initial port configuration, you can
access the Select Configuration window from the Port Monitor to make the
required changes.  To access the Select Configuration window from the Port
Monitor:

 1. Click on the Port Monitor icon in the Program Group window.
 2. Click on Actions from the title bar in the Port Monitor window.
 3. Click on Select ISDN Port Configuration.  The Select Configuration window
    appears.


ΓòÉΓòÉΓòÉ 105. Switch Configuration Type ΓòÉΓòÉΓòÉ

 Switch Configuration Type

The Switch Configuration Type is the ISDN switch that serves your network.
Different switch types support different protocols and services.

Your provider of service will tell you the type of switch you will need to use
with your ISDN Data/Fax Modem.  If at any time you  change the switch type, you
must close and restart the Port Monitor and Com Port driver applications.


ΓòÉΓòÉΓòÉ 106. AT&T 5ESS Custom Switch Type ΓòÉΓòÉΓòÉ

 AT&T 5ESS Custom Switch Type

Selecting AT&T 5ESS Custom configures your Digital Modem to operate with the
AT&T 5ESS 5E4 through AT&T 5ESS 5E7 and AT&T Custom network switch types.

If your local phone company specified one of these switch types when you called
to request ISDN service, select this option now.


ΓòÉΓòÉΓòÉ 107. Northern Telecom DMS100 Switch Type ΓòÉΓòÉΓòÉ

 Northern Telecom DMS100 Switch Type

Selecting Northern Telecom DMS100 configures your Digital Modem to operate with
the NT Protocol Version Control One switch type.

If your local phone company specified this switch type when you called to
request ISDN service, select this option now.


ΓòÉΓòÉΓòÉ 108. National ISDN 1 Switch Type ΓòÉΓòÉΓòÉ

 National ISDN 1 Switch Type

Selecting National ISDN 1 configures your Digital Modem to operate with the
National ISDN 1 compliant network switch type.  The Bellcore/Regional Bell
Operating Company's define protocols and services on the Basic Rate Access
interface, regardless of switch manufacturer.

If your local phone company specified the National ISDN 1 compliant switch type
when you called to request ISDN service, select this option now.


ΓòÉΓòÉΓòÉ 109. Phone Numbers ΓòÉΓòÉΓòÉ

 Phone Numbers

Select whether you would like to configure one phone number or two phone
numbers for the Digital Modem.


ΓòÉΓòÉΓòÉ 110. Phone Number - One ΓòÉΓòÉΓòÉ

 One Phone Number

Select 1 Phone Number if you have only one phone number to use with the ISDN
Configuration.


ΓòÉΓòÉΓòÉ 111. Phone Numbers - Two ΓòÉΓòÉΓòÉ

 Two Phone Numbers

Select 2 Phone Numbers  if you have two phone numbers to use with the ISDN
configuration.


ΓòÉΓòÉΓòÉ 112. Phone Number 1 ΓòÉΓòÉΓòÉ

 Phone Number 1

The Phone Number 1 field is where the phone number that is associated with the
ISDN Adapter's first phone line is entered.

The number should be entered in the following format:

XXXYYYYYYY

where XXX is the area code and YYYYYYY is the phone number.


ΓòÉΓòÉΓòÉ 113. Phone Number 2 ΓòÉΓòÉΓòÉ

 Phone Number 2

The Phone Number 2  field is where the phone number that is associated with the
ISDN Adapter's second phone line is entered.

The number should be entered in the following format:

XXXYYYYYYY

where XXX is the area code and YYYYYYY is the phone number.


ΓòÉΓòÉΓòÉ 114. Service Profile Identifier (SPID) ΓòÉΓòÉΓòÉ

 Service Profile Identifier (SPID)

The Service Profile Identifier (SPID) value is determined by the ISDN network
to which you are connected. You should have received a SPID when you subscribed
to your ISDN service.

If you did not receive a SPID, refer to the information on "Requesting ISDN
Service" in the Installation and Testing Instructions (packaged with the
adapter).  When you receive the SPID, be sure to record it on your
configuration worksheet.


ΓòÉΓòÉΓòÉ 115. Terminal Endpoint Identifier (TEI) ΓòÉΓòÉΓòÉ

 Terminal Endpoint Identifier (TEI)

The Terminal Endpoint Identifier (TEI)  is a value used to identify a specific
connection endpoint within a service access point.

There are two TEI types that you can specify, Auto (Dynamic) and Fixed
(Static).  If you specify Fixed, you must also provide the value.  This will be
unique to each line you configure.


ΓòÉΓòÉΓòÉ 116. Auto Terminal Endpoint Identifier ΓòÉΓòÉΓòÉ

 Auto Terminal Endpoint Identifier

Select Auto if you want the  Terminal Endpoint Identifier (TEI) value to be
automatically assigned by the network.  You should have received this
information when you subscribed for ISDN service.

Auto is the recommended selection for TEI type.


ΓòÉΓòÉΓòÉ 117. Fixed Terminal Endpoint Identifier (TEI) ΓòÉΓòÉΓòÉ

 Fixed Terminal Endpoint Identifier

Select Fixed if you want to assign a Terminal Endpoint Identifier (TEI) value
instead of having the network assign a value automatically.

You must fill in the TEI Value field if you select Fixed for TEI type.

Auto is the recommended selection for the TEI type.


ΓòÉΓòÉΓòÉ 118. TEI Value ΓòÉΓòÉΓòÉ

 Fixed Terminal Endpoint Identifier Value

The Terminal Endpoint Identifier Value is a value used to identify a specific
connection endpoint within a service access point.

The Terminal Endpoint Identifier Value can be any value between 0 and 63.


ΓòÉΓòÉΓòÉ 119. Grade of Service ΓòÉΓòÉΓòÉ

 Grade of Service

The Grade of Service defines the types of calls that can be handled by your
ISDN line.  Service types include Data Only, Voice Only, and both Data and
Voice.  The service type for your ISDN phone line has been assigned by your
service provider.


ΓòÉΓòÉΓòÉ 120. CSV/D Voice and Data ΓòÉΓòÉΓòÉ

 CSV/D Voice and Data

Circuit Switched Voice and Data (CSV/D) is the term used to refer to voice and
data signals on an ISDN phone line.  CSV/D allows both voice and data signals
to be processed for the same phone line by the Digital Modem.

Select CSV/D If your service provider has configured your line for CSV/D.


ΓòÉΓòÉΓòÉ 121. CSD Data Only ΓòÉΓòÉΓòÉ

 CSD Data Only

Circuit Switched Data (CSD) is the term used to refer to data-signals only on
an ISDN phone line.  CSD restricts the Digital Modem to processing data-signals
only.

Select CSD if your service provider has configured your line for CSD.


ΓòÉΓòÉΓòÉ 122. CSV Voice Only ΓòÉΓòÉΓòÉ

 CSV Voice Only

Circuit Switched Voice (CSV) is the term used to refer to voice-signals only on
an ISDN phone line.  CSV restricts the Digital Modem to processing
voice-signals only.

Select CSV if your service provider has configure your line for CSV.


ΓòÉΓòÉΓòÉ 123. ISDN Subscriber Name ΓòÉΓòÉΓòÉ

 ISDN Subscriber Number

This is the number allocated to you by your ISDN service provider.  It must be
a continuous string of digits in the range 0 through 9: for example, 98761234.


ΓòÉΓòÉΓòÉ 124. Passive Bus Incoming Call Selection ΓòÉΓòÉΓòÉ

 Passive Bus Incoming Call Selection

For Euro-ISDN and INS-NET64:
If your terminal is connected to a passive bus that is shared by other
terminals or telephones, the ISDN adapter can be given an address and only
incoming calls that match the address are passed to applications.  Calls that
do not match the address are ignored.

All Calls   Choose All Calls if you want all incoming calls to be selected by
            the ISDN adapter and passed to the application.

CPSA        Choose CPSA (Called Party Subaddress) to allow only incoming calls
            that match the CPSA information element.  The entire CPSA must
            match to allow the call to be selected.

MSN/DDI     Choose MSN/DDI (Multiple Subscriber Number/Direct Dial-In) to
            select only incoming calls that match the Called Party Number (CPN)
            information element.  A match is detected if the value of the
            adapter passive bus address and the corresponding number of digits
            at the end of the CPN information element are the same.  For
            example, if an address of 8210 is entered, an incoming call with a
            CPN of 98768210 is allowed.

For 1TR6:
If your terminal is connected to a passive bus, you can give the ISDN adapter a
unique address digit, known as the Endgerateauswahlziffer (EAZ) digit.  This is
the final digit of the destination address.  Only incoming calls that match
that address are passed to the application; all other calls are ignored by the
ISDN adapter.

All Calls   Choose All Calls if you want all incoming calls to be selected by
            the ISDN adapter and passed to the application.

            Note:  This is the default.

EAZ_PBTS    Choose EAZ_PBTS (EAZ for Passive Bus Terminal Selection) for
            incoming-call selection using the EAZ digit in the destination
            address information element.  A match is detected when the
            selection digit of the passive bus terminal and the EAZ digit are
            the same.  For example, if you enter address 4, an incoming call
            with destination address 98768214 is passed to the applications.

            Note: The calling party must ensure that the EAZ digit is added to
            the end of the destination address.


ΓòÉΓòÉΓòÉ 125. Passive Bus Address ΓòÉΓòÉΓòÉ

 Passive Bus Address

For Euro-ISDN and INS-NET64:
This is the address allocated to this adapter when incoming call selection by
CPSA or
MSN/DDI  was chosen.  Leave this field blank if  All Calls was chosen.

If CPSA  or  MSN/DDI  was chosen, the address of the ISDN adapter must be
entered in this field.

The address format for CPSA can be:

NSAP (X.213)   A string of 1 to 20 IA5 digits starting with the letter P.  For
               example, P3310.

User specified A user-defined string from 1 to 20 alphanumeric characters in
               length.

The address formation for MSN/DDI is a continuous string of 1 to 20 numeric
digits in the range of 0 through 9.


For 1TR6:
This is a single digit that you must allocate to the ISDN adapter.  The field
should be left blank if All Calls  was chosen for the Passive Bus Terminal Call
Selection.

If terminal call selection is used, ensure that the Passive Bus Terminal Call
Selection is set to EAZ_PBTS

The format for EAZ_PBTS  is a digit in the range 1 to 9.  A remote user must
make a call that includes this digit (in the way specified by the Passive Bus
Terminal Call Selection) so that the ISDN adapter can accept the call.


ΓòÉΓòÉΓòÉ 126. Passive Bus Terminal Call Selection ΓòÉΓòÉΓòÉ

 Passive Bus Terminal Call Selection

If your terminal is connected to a passive bus, you can give the ISDN adapter a
unique address digit, known as the Endgerateauswahlziffer (EAZ) digit.  This is
the final digit of the destination address.  Only incoming calls that match
that address are passed to the application; all other calls are ignored by the
ISDN adapter.

Choose All Calls  if you want all incoming calls to be passed to the
applications.

Note:  This is the default.

Choose EAZ_PBTS (EAZ for Passive Bus Terminal Selection) for incoming-call
selection using the EAZ digit in the destination address information element.
A match is detected when the selection digit of the passive bus terminal and
the EAZ digit are the same.  For example, if you enter address 4, an incoming
call with destination address 98768214 is passed to the applications.

Note: The calling party must ensure that the EAZ digit is added to the end of
the destination address.


ΓòÉΓòÉΓòÉ 127. Passive Bus Terminal Selection Digit ΓòÉΓòÉΓòÉ

 Passive Bus Terminal Selection Digit

This is a single digit that you must allocate to the ISDN adapter.  The field
should be left blank if All Calls  was chosen for the Passive Bus Terminal Call
Selection.

If terminal call selection is used, ensure that the Passive Bus Terminal Call
Selection is set to EAZ_PBTS

The format for EAZ_PBTS  is a digit in the range 1 to 9.  A remote user must
make a call that includes this digit (in the way specified by the Passive Bus
Terminal Call Selection) so that the ISDN adapter can accept the call.


ΓòÉΓòÉΓòÉ 128. D-Channel ISDN Signaling TEI Mode ΓòÉΓòÉΓòÉ

 D-Channel ISDN Signaling TEI Mode

Choose  auto  (default)  if the TEI is assigned automatically.  Choose manual
if a specific TEI value has been assigned by the service provider.  The value
is in the range 0 through 63.


ΓòÉΓòÉΓòÉ 129. D-Channel ISDN Signaling TEI Value ΓòÉΓòÉΓòÉ

 D-Channel ISDN Signaling TEI Value

A value for this field is required only if you have chosen manual as the
D-Channel ISDN signaling TEI mode.  The value must be in the range 0 through 63
and is unique for each manual TEI.  The TEI is allocated by your service
provider to allow access to the D-Channel for ISDN signaling.


ΓòÉΓòÉΓòÉ 130. Help for V.120 Configuration ΓòÉΓòÉΓòÉ

 Help for V.120 Configuration

V.120 Driver Overview
Maximum Retries (N200)
Idle Timer (T203)
Retry Timer (T200)
Maximum Transmit Size
Maximum Receive Size
Error Correction
Transmit Window Size


ΓòÉΓòÉΓòÉ 131. Maximum Number of Retransmissions ΓòÉΓòÉΓòÉ

 Maximum Number of Retries

The maximum number of retries (N200) value specifies the number of times an
unacknowledged frame will be transmitted before the Digital Modem tries to
restart the link.


ΓòÉΓòÉΓòÉ 132. Idle Timer (T203) ΓòÉΓòÉΓòÉ

 Idle Timer

The data link control (DLC) idle timer (T203) value specifies the maximum time
allowed (in seconds) without frames being exchanged.  If this time expires, the
link is no longer present.


ΓòÉΓòÉΓòÉ 133. Retry Timer (T200) ΓòÉΓòÉΓòÉ

 Retry Timer

The Retry Timer (T200) value specifies the amount of time (in seconds) that the
Digital Modem will wait for an acknowledgment of a transmitted l-frame before
sending the frame again.


ΓòÉΓòÉΓòÉ 134. Maximum Transmit Size ΓòÉΓòÉΓòÉ

 Maximum Transmit Size

The Maximum Transmit Size (N201) value specifies the maximum number of bytes in
the information field of a transmitted frame.  The Maximum Transmit Size may be
any value between 128 and 260.


ΓòÉΓòÉΓòÉ 135. Maximum Receive Size ΓòÉΓòÉΓòÉ

 Maximum Receive Size

The Maximum Receive Size (N201) value specifies the maximum number of bytes in
the information field of a received frame.  This value can help you determine
whether a transmission error has occurred.  The Maximum Receive Size can be any
value between 128 and 260.


ΓòÉΓòÉΓòÉ 136. Error Correction ΓòÉΓòÉΓòÉ

 Error Correction

Select this option if you would like acknowledgment that data frames sent have
been received.  If you do not receive acknowledgment, data frames are resent.

Do not select this option if you do not want acknowledgment that data frames
have been sent and received.

Some communications drivers perform error correction, so it may not be
necessary for you to select this option.  However, it will cause no problems if
error correction is done in both the driver and the modem.


ΓòÉΓòÉΓòÉ 137. Transmit Window Size ΓòÉΓòÉΓòÉ

 Transmit Window Size

The Transmit Window Size (K-value) specifies the maximum number of l-frames
that can be sent without receiving an acknowledgment from the remote device for
the first frame in the group of frames being sent.


ΓòÉΓòÉΓòÉ 138. Async-to-Sync Configuration Help ΓòÉΓòÉΓòÉ

 Async-to-Sync Configuration Help

ADLC Driver Overview
HDLC/ASYNC-to-SYNC Conversion
TCP/IP SLIP-to-HDLC Encapsulation
TCP/IP SLIP-to-RFC 1294 Encapsulation
DLCI
User Name


ΓòÉΓòÉΓòÉ 139. HDLC/ASYNC-to-SYNC Conversion ΓòÉΓòÉΓòÉ

 HDLC/ASYNC-to-SYNC Conversion

Select this option if you would like to enable remote LAN access via the LAN
Distance* application.  The combination of the ISDN Data/Fax Modem and the LAN
Distance software allows a remote user to access the same LAN applications
available to a locally LAN-attached terminal.


ΓòÉΓòÉΓòÉ 140. TCP/IP SLIP-to-HDLC Encapsulation ΓòÉΓòÉΓòÉ

 TCP/IP SLIP-to-HDLC Encapsulation

Select this option if you would like to remove the control characters
associated with the Serial Line Internet Protocol (SLIP) and transmit the IP
data packets encapsulated with HDLC framing at a 56-kbps or 64-kbps data rate.


ΓòÉΓòÉΓòÉ 141. TCP/IP SLIP-to-RFC 1294 Encapsulation ΓòÉΓòÉΓòÉ

 TCP/IP SLIP-to-RFC 1294 Encapsulation

Select this option if you would like to remove the control characters
associated with the Serial Line Internet Protocol (SLIP) and transmit the IP
data packets encapsulated with RFC1294 (RFC1490) framing at a 56-kbps or
64-kbps data rate.


ΓòÉΓòÉΓòÉ 142. DLCI ΓòÉΓòÉΓòÉ

 DLCI

The Data Link Control Identifier (DLCI) is a numeric identifier that is used in
a frame-relay network to identify the next segment of a permanent virtual
circuit over which a frame is to be relayed.


ΓòÉΓòÉΓòÉ 143. User Name ΓòÉΓòÉΓòÉ

 User Name

The User Name is a 24-character-alphanumeric field that uniquely identifies the
Digital Modem to the device with which you are communicating.

The User Name verification might be disabled by leaving this field blank.


ΓòÉΓòÉΓòÉ 144. Change Phone Number Discrimination  - Modem ΓòÉΓòÉΓòÉ

 Change Phone Number Discrimination Help
Modem Driver

Modem Driver Overview
Use for placing calls
Answer all calls
Answer no calls
Answer only voice calls


ΓòÉΓòÉΓòÉ 145. Change Phone Number Discrimination - V.120 ΓòÉΓòÉΓòÉ

 Change Phone Number Discrimination Help
V.120 Driver

V.120 Driver Overview
Use for placing calls
Answer all calls
Answer no calls
Answer only data calls
Answer only voice calls


ΓòÉΓòÉΓòÉ 146. Change Phone Number Discrimination - V.120/Modem ΓòÉΓòÉΓòÉ

 Change Phone Number Discrimination
V.120/Modem Driver

V.120/Modem Driver Overview
Ignore calls
Answer calls w/V.120
Answer calls w/Modem
Answer calls w/ V.120/Modem
Answer data calls w/V.120
Answer voice calls w/Modem


ΓòÉΓòÉΓòÉ 147. Change Phone Number Discrimination - ADLC ΓòÉΓòÉΓòÉ

 Change Phone Number Discrimination Help
ADLC Driver

ADLC Driver Overview
Use for placing calls
Answer all calls
Answer no calls
Answer only data calls
Answer only voice calls


ΓòÉΓòÉΓòÉ 148. Use For Placing Calls ΓòÉΓòÉΓòÉ

 Use for placing calls

Check this option for the phone number you want to use for placing calls.


ΓòÉΓòÉΓòÉ 149. Answer All Calls ΓòÉΓòÉΓòÉ

 Answer all calls

Check this option if you want to answer all calls (voice or data) for this
phone number.


ΓòÉΓòÉΓòÉ 150. Answer No Calls ΓòÉΓòÉΓòÉ

 Answer no calls

Check this option if you want to ignore all incoming calls.


ΓòÉΓòÉΓòÉ 151. Answer Only Voice Calls ΓòÉΓòÉΓòÉ

 Answer only voice calls

Check this option if you want only voice calls to be answered.


ΓòÉΓòÉΓòÉ 152. Answer Only Data Calls ΓòÉΓòÉΓòÉ

 Answer only data calls

Check this option if you want only data calls to be answered.


ΓòÉΓòÉΓòÉ 153. Ignore Calls ΓòÉΓòÉΓòÉ

 Ignore calls

Check this option if you do not want any of your calls answered by the driver.


ΓòÉΓòÉΓòÉ 154. Answer Calls With Modem ΓòÉΓòÉΓòÉ

 Answer calls w/Modem

Check this option if you want all of your incoming calls to be answered by the
Modem driver.


ΓòÉΓòÉΓòÉ 155. Answer Calls With V.120 ΓòÉΓòÉΓòÉ

 Answer calls w/V.120

Check this option if you want all of your incoming calls to be answered by the
V.120 driver.


ΓòÉΓòÉΓòÉ 156. Answer Calls With V.120/Modem ΓòÉΓòÉΓòÉ

 Answer calls w/ V.120/Modem

Check this option if you want your incoming data calls to be answered by the
V.120 driver and your incoming voice calls to be answered by the Modem driver.


ΓòÉΓòÉΓòÉ 157. Answer Data Calls With V.120 ΓòÉΓòÉΓòÉ

 Answer data calls w/V.120

Check this option if you want your incoming data calls to be answered by the
V.120 driver.


ΓòÉΓòÉΓòÉ 158. Answer Voice Calls With Modem ΓòÉΓòÉΓòÉ

 Answer voice calls w/Modem

Check this option if you want your incoming voice calls to be answered by the
Modem driver.


ΓòÉΓòÉΓòÉ 159. ISA Dip Switch Settings ΓòÉΓòÉΓòÉ

 ISA Dip Switch Settings Help

I/O Port Address
System Interrupt
Channel Timing
COMM
Disable
Enable
Port (I/O Address)
Interrupt
DMA
Channel
Acknowledge
Re-request Timer
Byte/Word


ΓòÉΓòÉΓòÉ 160. IO Port Address ΓòÉΓòÉΓòÉ

 I/O Port Address

Each adapter installed in your computer must have a unique I/O port address to
allow communication between the adapter and the system unit.

You must set this address so that it does not conflict with the I/O address of
any other adapter already installed in your computer.  Incorrect operation
might occur if conflicts exist.


ΓòÉΓòÉΓòÉ 161. System Interrupt ΓòÉΓòÉΓòÉ

 System Interrupt

Each device used by a computer must use a unique Interrupt Request Level (IRQ)
selection to allow communication between the device and the system unit.  A
device is defined as any adapter, fixed disk drive controller, printer,
monitor, or other such hardware being used by the computer.  Incorrect
operation may occur if two devices being used by the computer have the same IRQ
value.


ΓòÉΓòÉΓòÉ 162. Channel Timing ΓòÉΓòÉΓòÉ

 Channel Timing

The channel timing parameter defines when the ISDN Data/Fax Modem's I/O channel
ready signal will be generated.  The channel timing parameter allows the ISDN
Data/Fax Modem to be compatible with different implementations of the ISA
architecture.

The value for the channel timing parameter should only be changed if your are
experiencing random errors or if the system fails with the switch in the Off
(default) position.


ΓòÉΓòÉΓòÉ 163. COMM ΓòÉΓòÉΓòÉ

 COMM

The COMM port (or Serial Port) is one of the ways in which your personal
computer system communicates. COMM port designations are assigned to serial
ports or to internal devices.  For example, if you have a personal computer
system with only one serial port, by default that serial port would be assigned
a COM 1 port designation.

For more information on the various COMM port related settings, click on each
of the following:

Disable
Enable
Port (I/O Address) Interrupt


ΓòÉΓòÉΓòÉ 164. COMM Disable ΓòÉΓòÉΓòÉ

 COMM Disable

This switch selection allows you to disable the COMM port.

Note:   The COMM port switch must be enabled to run applications that
communicate with the ISDN Data/Fax Modem through the COMM port.


ΓòÉΓòÉΓòÉ 165. COMM Enable ΓòÉΓòÉΓòÉ

 COMM Enable

This switch selection allows you to enable the COMM port.

Note:   The COMM port switch must be enabled to run applications that
communicate with the ISDN Data/Fax Modem through the COMM port.


ΓòÉΓòÉΓòÉ 166. COMM Port ΓòÉΓòÉΓòÉ

 COMM Port

Many peripheral devices communicate with the system unit through communications
ports (COMM ports).  Each device must be configured to use a unique COMM port.
Improper operation will result when multiple devices are assigned to the same
COMM port.

COMM port configuration conflicts often involve other modems or on-board serial
ports.  If such a conflict occurs and the devices in conflict cannot be
assigned another COMM port, then a device must be disabled or removed in order
to use the ISDN Data/Fax Modem.


ΓòÉΓòÉΓòÉ 167. COMM Interrupt ΓòÉΓòÉΓòÉ

 COMM Interrupt

This parameter determines the interrupt level used for the COMM port.  The
linterrupt level used is dependent on the selected COMM port.

Each device using a COMM port must be assigned a uniqe interrupt level.  It is
standard to use the following COMM port and COMM Interrupt (IRQ) combinations:

COMM Port 1 and COMM IRQ 4
COMM Port 2 and COMM IRQ 3
COMM Port 3 and COMM IRQ 4
COMM Port 4 and COMM IRQ 3


ΓòÉΓòÉΓòÉ 168. DMA ΓòÉΓòÉΓòÉ

 DMA

Direct memory access (DMA) allows the transfer of data between memory and
input/output units without processor intervention.  This method is necessary to
support the high data speeds of the ISDN Data/Fax Modem.

For more information on the various DMA settings, click on each of the
following:

Channel
Acknowledge
Re-request Timer
Byte/Word


ΓòÉΓòÉΓòÉ 169. Channel ΓòÉΓòÉΓòÉ

 DMA Channel

The Direct Memory Access (DMA) channel is used by an adapter to transfer
information between system memory and the adapter.  Each adapter that uses DMA
must be assigned a unique DMA channel.  Multiple adapters attempting to use the
same DMA channel will result in incorrect operation of each adapter.

If each possible DMA channel for the ISDN Data/Fax Modem is already in use, one
of the other adapters in the system must have it's DMA channel changed to
another DMA channel or be removed.  Otherwise, the ISDN Data/Fax Modem cannot
be used.


ΓòÉΓòÉΓòÉ 170. DMA Acknowledge ΓòÉΓòÉΓòÉ

 DMA Acknowledge

Note:  This parameter applies to Rev B. Data/Fax Modem Cards only.  In most
cases, you will not need to change this parameter from its default value.

On certain ISA computers, the timing of the DMA Acknowledge signal can cause
the computer to hang when the computer is powered ON.  If you are experiencing
trouble with the computer hanging, change this parameter from its current
setting to its alternate value.  The possible settings are Gated and Normal.


ΓòÉΓòÉΓòÉ 171. DMA Re-request Timer ΓòÉΓòÉΓòÉ

 DMA Re-request Timer

This parameter determines the amount of time the ISDN Data/Fax Modem waits
between the completion of a DMA cycle and the request of another DMA transfer.

If a problem is encountered when using the ISDN Data/Fax Modem in a personal
computer with a 60 MHz or greater processor, changing this value may correct
the problem.


ΓòÉΓòÉΓòÉ 172. DMA Byte/Word ΓòÉΓòÉΓòÉ

 DMA Byte/Word

Most personal computers use 16-bit memory mapping for DMA.  If your personal
computer uses 8-bit memory mapping, you must change the value for the DMA
Byte/Word parameter.


ΓòÉΓòÉΓòÉ 173. ISDN Port Status ΓòÉΓòÉΓòÉ

 ISDN Port Status

The Status Messages box in the Port Monitor window displays messages that allow
you to monitor the ISDN port.  The status of any calls placed or received is
shown in the Status Messages box.  For example, you will see messages when a
call is connected or disconnected,  or if it is rejected.  You will also see
any warning or error messages in the Status Messages box.

When you see a message in the Status messages box, you can view more detailed
information about that message by viewing the information in ISDN Port Status
Messages.

In addition to the ISDN Port Status Messages, the ISDN Port Status Indicators
are used to monitor the overall status of the ISDN Port on a per-channel basis.
There is an LED for each of the following conditions:

LA - Line Active Indicator:
This indicator is turned on when the ISDN Digital Modem has determined that the
ISDN physical connection to the NT1 is correct.  It is important to note that
this indicator does not guarantee that in all cases the connection from the
telephone jack to the NT1 is correct.  On some networks this indicator will not
be active until a call attempt is made.

D-Channel Active Indicator:
This indicator is turned on when the signaling protocols have been completed on
the D-Channel.  Some networks require terminal initialization procedures that
must also be completed before this indicator becomes active.

Note:  These values may be exchanged with the network as soon as the ISDN Port
Monitor is activated, or they may be exchanged when either the first call has
been placed or the first call has been received.

B1 Channel Active Indicator
B2 Channel Active Indicator
These indicators are turned on when calls are active on the corresponding ISDN
B-Channels.


ΓòÉΓòÉΓòÉ 174. ISDN Port Status Messages ΓòÉΓòÉΓòÉ

 ISDN Port Status Messages

The ISDN Port Messages give a detailed description of the status of the ISDN
Port.  To determine the meaning behind a specific ISDN message, select one of
the items in the list below.  Note that the messages beginning with IN are
informational messages and the messages beginning with WN are warning messages.

ISDN Port Messages for Loading
IN00-IN09 Initialization Messages
WN00-WN09 Initialization Warnings
IN10-IN19 Incoming Call Messages
WN10-WN19 Incoming Call Warnings
IN20-IN29 Outgoing Call Messages
WN20-WN29 Outgoing Call Warnings
IN30-IN39 Call Release Messages
WN30-WN39 Call Release Warnings
IN40-IN49 General Status Messages
WN40-WN49 General Status Warnings
IN50-IN59 Line Status Messages
WN50-WN59 Line Status Warnings
Cause Values


ΓòÉΓòÉΓòÉ 175. ISDN Port Messages - Loading ΓòÉΓòÉΓòÉ

 ISDN Port Messages for Loading

ISDN D-Channel code loaded.

The ISDN D-Channel programs have been successfully loaded.


ISDN D-Channel code unloaded.

The ISDN D-Channel programs have been unloaded because there are no active ISDN
drivers.


ISDN D-Channel code load failure.

An error was detected when the D-Channel program was being loaded.  A file may
not have been installed properly. Restart the Operating System to ensure that
this is not a temporary failure.  If the problem persists, re-install the ISDN
Data/Fax Modem software.


ISDN D-Channel code load failure: Cable error.

The ISDN cable was not plugged in when the D-Channel code attempted to load.
Either the Analog cable was plugged in or no cable was detected at all.


ISDN D-Channel suspended.

The Operating system has suspended tasks to save power.  The D-Channel has been
suspended in the process.  No calls can be received in this suspended state.


ISDN D-Channel resumed.

The Operating System has resumed suspended tasks.  The D-Channel task has now
resumed operation.


Verify Switch Type Configuration.

This message should follow a more detailed indication of a problem (for
example, WN10: SPID initialization ignored).  The Switch Type configured should
be verified if initialization warnings persist.


ΓòÉΓòÉΓòÉ 176. ISDN Port Status Messages - Initialization ΓòÉΓòÉΓòÉ

 Initialization Messages

These messages correspond to the ISDN initialization.  They are useful to
determine whether the configuration options selected during installation are
correct.

Run the configuration option to correct any incorrect parameters and select ON
to activate the ISDN Port Monitor application.


IN01: TEI Initialized DN1
IN02: TEI Initialized DN2
This message appears when the ISDN Port Monitor has successfully requested and
received an Automatic (Dynamic) Terminal Endpoint Identifier (TEI) for the
corresponding Directory Number (DN) or Phone Number configured.

When the TEI is Fixed (Static), this message will appear automatically as there
is no need to request a TEI value from the network.  The value is provided when
you subscribe to ISDN service.


IN03: SPID Initialized DN1
IN05: SPID Initialized DN2
This message appears when the network has successfully responded to the Service
Profile Identifier (SPID) configured for the corresponding Directory Number
(DN) or Phone Number.  In this case, the successful response from the network
indicates that the SPID value will not be used.


IN04: SPID Initialized DN1
IN06: SPID Initialized DN2
This message appears when the network has successfully responded to the Service
Profile Identifier (SPID) configured for the corresponding Directory Number
(DN) or Phone Number.


IN07: Network Attempted TEI Init
This message appears when the ISDN Port Monitor receives a message from the
network attempting to initialize the given Terminal Endpoint Identifier (TEI).

Possible Problem: If the given TEI value is 64 or greater, the network is
                 attempting to initialize the Automatic (Dynamic) TEI value
                 shown, and this message is informational only.  If the given
                 TEI value is less than 64, the network is attempting to
                 initialize the Fixed (Static) TEI value shown, which is not
                 the same value as the current Fixed (Static) TEI configured.
                 If this message persists, this could indicate that the
                 configured Fixed (Static) TEI value is incorrect.

Possible Fix:    Verify that the configured Fixed (Static) TEI value is correct
                 using the information provided by the telephone company.  If
                 this information is unavailable, try configuring for the Fixed
                 (Static) TEI value shown in the message.


ΓòÉΓòÉΓòÉ 177. ISDN Port Status Warnings - Initialization ΓòÉΓòÉΓòÉ

 Initialization Warnings

These messages correspond to the ISDN initialization.  They are useful to
determine whether the configuration options selected during installation are
correct.


WN01: TEI Establish Failed DN1
WN02: TEI Establish Failed DN2
This message appears when the ISDN Port Monitor has requested an Automatic
(Dynamic) Terminal Endpoint Identifier (TEI) for the corresponding Directory
Number (DN) or Phone Number from the network and the network has not responded
to the request.

Possible Problem: This condition can occur when the ISDN Digital Modem is
                 configured for Automatic (Dynamic) TEI and the ISDN line is
                 Fixed (Static) TEI.  Another potential problem may be in the
                 physical connection.

Possible Fix:    First, verify that the TEI type configured is correct.  If
                 this has been verified, check the complete physical
                 connection.


WN03: ISDN Establish Failed
This message appears when the ISDN Port Monitor has attempted to establish a
protocol connection with the network and the network is not responding.

Possible Problem: This condition can occur when the ISDN Digital Modem is
                 configured for Fixed (Static) TEI and the ISDN line is
                 Automatic (Dynamic) TEI or if the Fixed TEI value configured
                 is incorrect.  Another potential problem may be in the
                 physical connection.

Possible Fix:    First, verify that the TEI type has been configured correctly.
                 Second, in the case of Fixed TEI, check that the TEI value
                 configured is correct.  Last, check the complete physical
                 connection.


WN04: TEI Removed DN1
WN05: TEI Removed DN2
This message appears when the ISDN Port Monitor receives a message from the
network indicating that the Terminal Endpoint Identifier (TEI) has been removed
and is no longer valid.

In the case of Automatic (Dynamic) TEI Type, this warning may occur when a
modem application is closed and opened again.  In this case, the messages
following this one should indicate that the TEI has been reestablished.

Possible Problem: If the TEI Type is configured for Automatic (Dynamic) and the
                 messages continue to change between "IN01: TEI Initialized
                 DN1" and "WN01: TEI Removed DN1," the ISDN line may be
                 misconfigured for Automatic (Dynamic) when the ISDN line is
                 actually set to a static (Fixed) value.

Possible Fix:    Verify that the TEI Type is correct using the information
                 provided by the telephone company.


WN06: TEI Removed DN1 (Fixed TEI)
WN07: TEI Removed DN2 (Fixed TEI)
This message appears when the ISDN Port Monitor receives a message from the
network indicating that the Terminal Endpoint Identifier (TEI) configured for
the corresponding Directory Number (DN) or Phone Number has been removed by the
network and is no longer valid.

Possible Problem: This condition is usually caused in the case of Fixed
                 (Static) TEI Type when two devices are attached to a passive
                 bus using the same Fixed TEI value.  The switch interprets
                 this as a violation.

Possible Fix:    This condition can be prevented by configuring the devices on
                 a passive bus to use different TEI values.


WN08: SPID Rejected DN1
WN09: SPID Rejected DN2
This message appears when the ISDN Port Monitor receives a message from the
network indicating that the Service Profile ID (SPID) configured for the
corresponding Directory Number (DN) or Phone Number is incorrect.

Possible Problem: This condition will occur if the configured SPID does not
                 match the SPID assigned to the ISDN line. values generally
                 contain the directory number and a suffix and/or prefix.  Your
                 service provider should provide the correct SPID value.


ΓòÉΓòÉΓòÉ 178. Incoming Call Messages and Warnings ΓòÉΓòÉΓòÉ

 Incoming Call Messages

These messages provide the status of incoming calls.

IN10: Incoming Call (Data):
This message appears when the ISDN Port Monitor receives a Call Setup message
from the network for a data call.

IN11: Incoming Call (Voice):
This message appears when the ISDN Port Monitor receives a Call Setup message
from the network for a voice or an audio call.

IN12: Incoming Call From:
This message provides the Phone Number of the device that placed the call to
the ISDN Digital Modem.

IN13: Incoming Call Alerting:
This message indicates that the incoming call has been acknowledged by the ISDN
Port Monitor.

IN14: Incoming Call Accepted:
This message indicates that the incoming call has been accepted by the
application currently being used with the ISDN Digital Modem.

IN15: Incoming Call Rejected:
This message indicates that an incoming call has been received but could not be
accepted.  This can occur for several reasons.  One possible reason for a
rejected call would be that the ISDN Digital Modem is configured to use two
Phone Numbers, and one of the two already has a call active when the second
call is received. The ISDN Digital Modem can handle only one active call at a
time; therefore, the second call is rejected.

IN16: Incoming Call To:
This message provides the user with the Phone Number being called when an
incoming Call Setup message is received.  This can be helpful when the ISDN
Digital Modem is configured to use two Phone Numbers.


ΓòÉΓòÉΓòÉ 179. Incoming Call Warnings ΓòÉΓòÉΓòÉ

 Incoming Call Warnings

These messages provide the status of incoming calls.

WN10: SPID Initialization Ignored:
The network has not responded to SPID initialization requests.  The value
selected for Switch Type in the configuration might not match your actual ISDN
switch type.  Verify the Switch Type with your ISDN service provider.

WN11: SPID Value Incorrect:
The network has indicated that the SPID message being used is not correct.  If
your ISDN Switch Type is AT&T Custom, you may still be able to place and
receive calls if your ISDN line has been installed with the Default Service
option enabled.  Not all types of calls can be sent or received.  Determine the
correct SPID value from your ISDN service provided and reconfigure.


ΓòÉΓòÉΓòÉ 180. Outgoing Call Messages ΓòÉΓòÉΓòÉ

 Outgoing Call Messages

These messages provide the status of Outgoing Calls.

IN22: Outgoing Call (Data):
This message indicates that an outgoing call has been placed from the
application being used on the ISDN Digital Modem and that the call type is Data
(64 Kbps or 56 Kbps).  This call type is most commonly used when an ISDN
Digital Data application is placing the call or when the user has indicated in
the configuration that the line being used is capable of supporting only
Circuit Switched Data (CSD) calls.  In this case, all calls placed will be data
calls.


IN23: Outgoing Call (Voice):
This message indicates that an outgoing call has been placed from the
Application being used on the ISDN Digital Modem and that the call type is
Voice.  This call type is most commonly used when a modem or fax call is being
placed or when the user has indicated in the configuration that the line being
used is capable of supporting only Circuit Switched Voice (CSV) calls.  In this
case, all calls placed will be voice calls.


IN24: Outgoing Call To:
This message provides the user with the Phone Number being called from the ISDN
Digital Modem.


IN25: Network Acknowledged Call:
This message indicates that the network has accepted the Call Setup message.


IN27: Call Accepted:
This message indicates that the destination has accepted the call.

Important:
 In some cases, this message occurs when the network has accepted the call to
provide an audio message regarding the call (for example, "The number you have
dialed is not in service").  If the "IN27: Call Accepted" message appears in
the ISDN Port Monitor window but the call does not appear to be working
correctly, increase the speaker volume for the application you are running to
listen to any messages that the network may provide.


IN28: Outgoing Call From:
This message provides the Phone Number from which the call is being placed.
This information can be helpful if the ISDN Digital Modem is configured to use
two Phone Numbers.


ΓòÉΓòÉΓòÉ 181. Outgoing Call Warnings ΓòÉΓòÉΓòÉ

 Outgoing Call Warnings

The following message provides the status of Outgoing Calls.

WN 20: Call Blocked/Blacklisted:
This will occur when the Data/Fax Modem has reached network required limits on
how frequently a number may be dialed within a set amount of time and how long
the application must wait between calls.  For example, in Japan, an
unsuccessful call should not be redialed more than three times in a 3-minute
period.

If this message occurs, you should wait and retry the call.


ΓòÉΓòÉΓòÉ 182. Call Release Messages ΓòÉΓòÉΓòÉ

 Call Release Messages

These messages provide more information regarding the Disconnect or Release of
a call.

IN30: Initiated Call Disconnect:
This message indicates that the ISDN Digital Modem has initiated Call
Disconnect.  This message normally appears when an application terminates a
call.  Use the Cause Value that follows this message to determine whether the
call is being disconnected normally or whether the cause of the disconnect
indicates a problem.


IN31: Call Disconnect Received:
This message indicates that the ISDN Digital Modem has received a message from
the network indicating Call Disconnect.  This occurs normally when an
application on the other end of the call simply hangs up. Use the Cause Value
that follows this message to determine whether the call is being disconnected
normally or if the cause of the disconnect indicates a problem.


ΓòÉΓòÉΓòÉ 183. Call Release Warnings ΓòÉΓòÉΓòÉ

 Call Release Warnings

These messages provide more information regarding the Disconnect or Release of
a call.

WN30: Call Release Received
This message indicates that the ISDN Digital Modem has received a message from
the network indicating Call Release.  This normally follows the Call Disconnect
message IN30.  Use the Cause Value that follows this message to determine
whether the call is being released normally or whether the cause of the release
message indicates a problem.


WN31: Call Release Sent
This message indicates that the ISDN Digital Modem has sent a Call Release
message to the network. In most cases, this message will follow the Call
Disconnect message IN31.  Use the Cause Value that follows this message to
determine whether the call is being released normally or whether the cause of
the release message indicates a problem.


ΓòÉΓòÉΓòÉ 184. General Status Messages ΓòÉΓòÉΓòÉ

 General Status Messages

IN40: Call Not End-to-End ISDN:
This message indicates that an ISDN route to/from the destination was not
available.  The call has been routed outside the ISDN network.  If the call
being made is a Data call (64 Kbps or 56 Kbps), this message indicates that a
64-kbps route is not possible and that the data will be exchanged at 56 Kbps.


ΓòÉΓòÉΓòÉ 185. General Status Warnings ΓòÉΓòÉΓòÉ

 General Status Warnings

This message provides general status information received from the network.

WN40: Warning Status Message
This message appears when the network sends a Status message in response to an
ISDN message that the network received from the ISDN Digital Modem.  Use the
Cause Value that follows this message to determine whether the Status message
received from the network indicates a problem.

Possible Problem: This condition will occur when the Phone Number has been
                 configured incorrectly and is attempting to place a call. In
                 this case, the Cause message that follows will be "Cause=100
                 Diag=108."

Possible Fix:    Select the Configuration option from the ISDN Port Monitor and
                 correct the configured Phone Number Value.


ΓòÉΓòÉΓòÉ 186. Line Messages ΓòÉΓòÉΓòÉ

 Line Messages

This message provides status information about the physical line as it changes.
The message corresponds with the Line Active Indicator in the Port Status
portion of the ISDN Port Monitor window.  This additional information is
provided so that you can determine where line interruptions occurred in
reference to active calls.


IN50: Line Active:
This message appears when the ISDN Physical Connection is active.  This message
means that the ISDN Digital Modem is correctly attached to the network.


Note:  Some networks will not activate the physical connection until an
outgoing call attempt is made or until an incoming call arrives.


ΓòÉΓòÉΓòÉ 187. Line Warnings ΓòÉΓòÉΓòÉ

 Line Warnings

This message provides status information about the physical line as it changes.
The message corresponds with the Line Active Indicator in the Port Status
portion of the ISDN Port Monitor window.  This additional information is
provided so that you can determine where line interruptions have occurred in
reference to active calls.

WN50: Line Error Reported:
This message appears when the ISDN Physical Connection has been deactivated.

Possible Problem: The physical connection between the ISDN Digital Modem and
                 the NT1 has been deactivated (for example, the ISDN cable
                 connected to the ISDN Digital Modem has been removed). Another
                 case might be that another device has been attached on the
                 passive bus and either the NT1 or the other device is not set
                 up correctly.

Possible Fix:    First, verify that the complete physical connection has not
                 been broken. Second, if a device has been added to the passive
                 bus, refer to both the NT1 documentation and the section
                 entitled "Connecting Multiple Devices" in the Guide to
                 Operations for assistance when arranging a passive bus
                 connection.


ΓòÉΓòÉΓòÉ 188. ISDN Cause Values ΓòÉΓòÉΓòÉ

 ISDN Cause Values

The cause values listed below have either been sent to or received from the
ISDN Digital Modem regarding either the clearing or status of a call.

The cause values may be different based on the specific network to which the
ISDN Digital Modem is attached.  The list below contains some explanation of
situations that cause a call to be unsuccessful.  However, neither the list nor
the suggestions for the types of problems that may be encountered complete.
These values are meant to serve as a guide to help determine whether problems
exist and where they can originate.


Cause Value 1 - Unallocated (Unassigned) Number:
This cause indicates that the called party cannot be reached because, although
the called party number is in a valid format, it is not currently allocated
(assigned).

Cause Value 2 - No Route to Specified Transit Network (National Use):
This cause indicates that the equipment sending this cause has received a
request to route the call through a particular transit network which it does
not recognize.  The equipment sending this cause does not recognize the transit
network either because the transit network does not exist or because that
particular transit network, while it does exist, does not serve the equipment
which is sending this cause.

This cause is supported on a network-dependent basis,

Cause Value 3 - No Route to Destination:
This cause indicates that the called party cannot be reached because the
network through which the call has been routed does not serve the destination
desired.

This cause is supported on a network-dependent basis.

Cause Value 6 - Channel Unacceptable:
This cause indicates that the channel most recently identified is not
acceptable to the sending entity for use in this call.

Cause Value 16 - Normal Call Clearing:
This cause indicates that the call is being cleared because one of the users
involved in the call has requested that the call be cleared.

Under normal situations, the source of this cause is not the network.

Cause Value 17 - User Busy:
This cause is used to indicate that the called party is unable to accept
another call because the user busy condition has been encountered.  This cause
value may be generated by the called user or by the network. In the case of
user-determined user busy, it is noted that the user equipment is compatible
with the call.

Cause Value 18 - No User Responding:
This cause is used when a called part does not respond to a call establishment
message with either an alerting or connect indication within the prescribed
period of time allocated.

Cause Value 19 - User Alerting, No Answer:
This cause is used when a called party does not respond to a call establishment
message with either an alerting or connect indication within the prescribed
period of time allocated..

Cause Value 21 - Call Rejected:
This cause indicates that the equipment sending this cause does not wish to
accept this call, although it could have accepted the call because the
equipment sending this cause is neither busy nor incompatible.

This cause may also be generated by the network, indicating that the call was
cleared due to a supplementary service constraint.  The diagnostic field may
contain additional information about the supplementary service and reason for
rejection.

Cause Value 22 - Number Changed:
This cause is returned to a calling party when the called party number
indicated by the calling party is no longer assigned.  The new called party
number may optionally be included in the diagnostic field.  If a network does
not support this cause value, cause Value 1, unallocated (unassigned) number ,
shall be used.

Cause Value 27 - Destination Out of Order:
This cause indicates that the destination indicated by the user cannot be
reached because the interface to the destination is not functioning correctly.
The term "not functioning correctly" indicates that a signaling message was
unable to be delivered to the remote party; e.g., a physical layer or data link
layer failure at the remote party, or user equipment off-line.

Cause Value 28 - Invalid Number Format (Address Incomplete):
The destination could not be reached as the number being called is not correct
or not complete.

Cause Value 31 - Normal, Unspecified:
This cause is used to report a normal event only when no other cause in the
normal class applies.

Cause Value 34 - No Circuit/Channel Available:
This cause indicates that there is no appropriate circuit/channel presently
available to handle the call.

Cause Value 38 - Network Out of Order:
This cause indicates that the network is not functioning correctly and that the
condition is likely to last a  relatively long period of time; e.g.,
immediately re-attempting the call is not likely to be successful.

Cause Value 41 - Temporary Failure:
This cause indicates that the network is not functioning correctly and that the
condition is not likely to last a long period of time; e.g., the user may wish
to try another call attempt almost immediately.

Cause Value 42 - Switching Equipment Congestion:
This cause indicates that the switching equipment generating this cause is
experiencing a period of high traffic.

Cause Value 43 - Access Information Discarded:
This cause indicates that the network could not deliver access information to
the remote user as requested, i.e. user-to-user information, low-layer
compatibility, high-layer compatibility, or sub-address, as indicated in the
diagnostic.

Cause Value 44 - Requested Circuit/Channel Not Available:
This cause is returned when the circuit or channel indicated by the requesting
entity cannot be provided by the other side of the interface.

Cause Value 47 - Resource Unavailable:
This cause is used to report a resource unavailable event only when no other
cause in the resource unavailable class applies.

Cause Value 50 - Requested Facility Not Subscribed:
This cause indicates that the user has requested a supplementary service switch
is implemented by the equipment which generated this cause, but the user is not
authorized to use.

For North American networks, this cause generally indicates that the SPID/TID
initialization process has not been completed.
Note:  If you are attached to an AT&T custom switch in the U.S., this cause
value frequently occurs if the SPID value is incorrect.

Cause Value 54 - Incoming Calls Barred:
This cause indicates that the destination will not accept the Call Setup.

Cause Value 57 - Bearer Capability Not Authorized:
This cause indicates that the user has requested a bearer capability that is
implemented by the equipment that generated this cause but that the user is not
authorized to use.

Cause Value 58 - Bearer Capability Is Not Available:
This cause indicates that the user has requested a bearer capability which is
implemented by the equipment which generated this cause but which is not
available at this time.

Cause Value 63 - Service or Option Not Available:
This is the default Cause Value when a specific service was not requested or is
not available and no other Cause Value applies.  (See Cause Value 57 for a
probable problem and fix.)

Cause Value 65 - Bearer Capability Not Implemented:
The Grade of Service requested is not implemented.

Cause Value 81 - Unrecognized Call Reference Value:
This cause indicates that the equipment sending this cause has received a
message with a call reference which is not currently in use on the user-network
interface.

Cause Value 88 - Incompatible Destination:
This cause indicates that the equipment sending this cause has received a
request to establish a call which has low layer compatibility, high layer
compatibility, or other compatibility attributes which cannot be accommodated.

Cause Value 96 - Mandatory Information Element Is Missing:
This cause indicates that the equipment sending this cause has received a
message which is missing an information element that must be present in the
message before the message can be processed.

Cause Value 97 - Message Type Non-existent or Not Implemented:
This cause indicates that the equipment sending this cause has received a
message with a message type it does not recognize either because this is a
message not defined or defined but not implemented by the equipment sending
this cause.

Cause Value 98 - Message Not Compatible With Call State or Message Type
Non-Existent or Not Implemented:

This cause indicates that the equipment sending this cause has received a
message such that the procedures do not indicate that this is a permissible
message to receive while in the call state, or a STATUS message was received
indicating an incompatible call state.

Cause Value 99 - Information Element/Parameter Non-existent or Not Implemented:
This cause indicates that the equipment sending this cause has received a
message which includes information element(s)/parameter(s) not recognized
because the information element identifier(s)/parameter name(s) are not defined
or are defined but not implemented by the equipment sending the cause.  This
cause indicates that the information element(s)/parameter(s) were discarded.
However, the information element is not required to be present in the message
in order for the equipment sending the cause to process the message.

Cause Value 100 - Information in ISDN Message Incorrect:
Part of the information in the ISDN message is not correct.  In this case, the
Diagnostic values might be helpful.  Look for the corresponding Diagnostic
value for additional help:

Diagnostic = 4

Bearer capability is incorrect.
See Cause 57.

Diagnostic = 58
SPID value is incorrect.
Verify SPID value in configuration.

Diagnostic = 108
Configured Phone Number is incorrect.
Verify configured Phone Number.

Diagnostic = 112
Number being dialed is incorrect.
Verify the Phone Number being called.

Cause Value 102 - Call Establishment Timer Expired:
One of the necessary responses from either the terminal or the network has not
been received.  The corresponding timer that was set to wait for the response
has expired.

   Possible Problem: This can occur if either the Phone Number (or Directory
                    Number) configured is incorrect or if the Phone Number does
                    not correspond to the correct TEI value in the case of
                    Fixed (Static) TEI.

Use the ISDN Digital Modem Configuration to verify the Phone Number and TEI
type and value.

Cause Value 127 - Interworking, Unspecified:
Due to Interworking in the network, a valid Cause value cannot be ascertained.


ΓòÉΓòÉΓòÉ 189. Problem Determination ΓòÉΓòÉΓòÉ

 Problem Solving

This section contains information that will help you troubleshoot problems with
the ISDN Data/Fax Modem.  In addition to the information in this section, there
are specific error messages that you can receive.  Any message that appears
will also display instructions about how to correct the error.  If you receive
an error message, follow the instructions displayed.

If the instructions displayed with an error message do not contain enough
information for you to correct the error, you can use the Help option to find a
more detailed description of the error.

If you still cannot correct the error, use the following information to start
the troubleshooting process:

To troubleshoot a problem:

 1. Locate the symptom below that  best describes the problem.

 2. Click on the recommended section to go to.

 3. Read the information in the recommended section and perform any requested
    actions.

Symptom:                           Recommended Action:

Problem with the adapter's operation. Click on Testing the Adapter.

Received errors while testing the adapter. Click on Problems While Testing the
                                   Adapter.

Other problems not described here. Click on Common Errors.

Note:  If you are still experiencing problems after trying the suggested
actions above, see Help and Service Information for information on obtaining
service for your adapter.


ΓòÉΓòÉΓòÉ 190. Testing the Adapter ΓòÉΓòÉΓòÉ

 Testing the Adapter

If you are having problems with the adapter's operation, perform the procedure
in this section and follow any suggested actions that you receive.  Then, run
the tests again to determine if the actions you have taken corrected the
problems with the adapter's operation.

Ensure that the adapter and cables are properly connected before you begin
testing.  See Connecting the Adapter if you need more information on connecting
the adapter and cables.

 1. At your computer's DOS prompt, insert the Diagnostics Diskette into your
    computer's A: disk drive.  (To get to your computer's DOS prompt from the
    OS/2 system, select the OS/2 system icon, select the Command Prompts icon,
    and then select a DOS window icon.

 2. Type a: and press Enter.

 3. Type wrdiag and press Enter.  The diagnostics panel appears.

 4. Press Enter.  The Test Selection Menu appears.

 5. Select Run tests one time and press Enter.  A message will be displayed to
    inform you that the adapter is being tested.

 6. When you are presented with the option to run the Loopback and Audio
    (Speaker) tests, enter Y.  The program will continue to prompt you for
    responses.  Respond to the prompts until the tests are completed.

 7. If an error occurs, try the suggested action and run the tests again.  If
    you are still experiencing problems with your adapterТs operation after
    trying the suggested action and running the test again, go to Problems
    While Testing the Adapter and follow the procedure.


ΓòÉΓòÉΓòÉ 191. Problems Testing the Adapter ΓòÉΓòÉΓòÉ

 Problems While Testing the Adapter

If an error occurs during testing of the adapter, refer to the following
instructions.

 1. If you receive an error and you have not already done so, try the suggested
    action and run the test again, starting at Testing the Adapter.

 2. If the problem persists after you test the adapter again, check that the
    following conditions have been met before obtaining service:

   ΓêÖ  All cabling is firmly connected.

   ΓêÖ  The adapter is firmly seated in the option slot.

   ΓêÖ  There are no compatibility problems between the ISDN Data/Fax Modem and
   one or more other ports in your personal computer.

To isolate a compatibility problem, first, check to ensure that you have not
configured an internal serial port to the same address as the ISDN Data/Fax
Modem.  Then, remove the other PCMCIA adapters from your personal computer
system and run the adapter tests while these adapters are removed.

   Note:  Mwave technology currently supports a maximum of one Mwave-
compatible adapter per system.  if you have another Mwave-compatible adapter in
your system, it will not work with your ISDN Data/Fax Modem.

ΓêÖ  If the ISDN Data/Fax Modem is connected to an NT1 through building wiring,
check to ensure that the building wiring is functioning properly by
disconnecting the ISDN Data/Fax Modem from the wall outlet and connecting it
directly to the NT1.

ΓêÖ  The NT1 (if applicable) is operating correctly.

ΓêÖ  There are no problems that exist with the computer.

If any of the above conditions have not been met, correct any problems and run
the adapter tests again, starting at Testing the Adapter.

If the above conditions have been met, have your computer, adapter, and adapter
cables serviced if necessary.  See Help and Service Information for information
on obtaining service.


ΓòÉΓòÉΓòÉ 192. Common Errors ΓòÉΓòÉΓòÉ

 Common Errors

This section describes some of the common errors that can occur with the ISDN
Data/Fax Modem.  These errors are usually the result of a configuration or
setup discrepancy, and can usually be corrected by changing a configuration
parameter or changing the connection of the ISDN Data/Fax Modem or NT1.

The error descriptions are grouped by "Modem Errors" and "ISDN Errors."  To
isolate a problem, Click on the appropriate group below and then read the
descriptions of each error to determine the one that best describes your
problem. Then, perform the recommended actions to correct the problem.

Click on:

ΓêÖ  Modem Errors to view common modem errors

ΓêÖ  ISDN Errors  to view common ISDN errors.


ΓòÉΓòÉΓòÉ 193. Modem Errors ΓòÉΓòÉΓòÉ

 Modem Errors

To isolate a problem with the modem:

 1. Read each description below to determine the one that best describes your
    error.

 2. Click on the modem error number that corresponds to the description you
    have chosen.

 3. Read the error description and follow the recommended user response.

 4. To get details on a specific panel error code, for example WN06, go to the
    modem panel, click on Help, click on Help for Modem Driver, and then use
    the modem search pulldown to find details.  The Port Monitor Help can also
    be used to search for an explanation to an error code.

Modem Error Number            Description:

ME1                           Windows error message that the selected COMM port
                              is either not supported or is being used by
                              another device.

ME2                           No response from application driver (Modem,
                              V.120, V.120/Modem, HDLC Async to Sync,
                              TCP/IP-SLIP) when running communications
                              application.

ME3                           Modem will not connect at higher speeds.


ΓòÉΓòÉΓòÉ 194. Modem Error 1 ΓòÉΓòÉΓòÉ

 Modem Error 1

OS/2 error message that the selected COMM port is either not supported or is
being used by another device.

Description:  The ISDN Data/Fax Modem is configured as a different COMM port
than the application or another application is using the ISDN Data/Fax Modem.

User Response:  Check to ensure that the ISDN Data/Fax Modem's COMM Port
configuration value and the application's COMM port configuration value match.
If not, reconfigure either the application or the ISDN Data/Fax Modem. If
another application is using the ISDN Data/Fax Modem, close the other
application.

If you are not sure how the ISDN Data/Fax Modem is configured, run the
configuration program again as described in the installation instructions
shipped with the ISDN Data/Fax Modem adapter.

If the ISDN Data/Fax Modem was installed after OS/2 was started, exit and
restart OS/2 to have the ISDN Data/Fax Modem recognized.


ΓòÉΓòÉΓòÉ 195. Modem Error 2 ΓòÉΓòÉΓòÉ

 Modem Error 2

No response from application driver (Modem, V.120, V.120/Modem, HDLC, Async to
Sync, TCP/IP-SLIP) when running communications application.

Description:  Indicates a conflict in COMM port addresses or interrupt
assignments.

User Response:  Make sure that all appropriate application drivers have been
loaded onto your ISDN Data/Fax Modem.  If all drivers have been loaded and you
still get no response from your communications application, verify that the
COMM port address and interrupt assignments specified in your communication
applications match the COMM port addresses and interrupt assignments configured
for the ISDN Data/Fax Modem.

If you are not sure how the ISDN Data/Fax Modem is configured, run the
configuration program again as described in the installation instructions
shipped with the ISDN Data/Fax Modem adapter.

If the ISDN Data/Fax Modem was installed after OS/2 was started, exit and then
restart OS/2 to have the ISDN Data/Fax Modem recognized.


ΓòÉΓòÉΓòÉ 196. Modem Error 3 ΓòÉΓòÉΓòÉ

 Modem Error 3

Modem will not connect at higher speeds.

Description:  Indicates that the wrong modem speed has been chosen or that the
other modem is limiting the connection.  (Modems negotiate down to the maximum
bps capability of the slower modem.)

User Response:  Open the Modem application driver and select the Configuration
pulldown.  If the modem speed you want to use is not checked, select the
desired modem speed and restart the modem application.


ΓòÉΓòÉΓòÉ 197. ISDN Errors ΓòÉΓòÉΓòÉ

 ISDN Errors

To isolate an ISDN problem:

 1. Read each description below to determine the one that best describes your
    error.

 2. Click on the ISDN error number that corresponds to the description you have
    chosen.

 3. Read the error description and follow the recommended user response.

 4. To get details on a specific panel error code, for example WN06, go to the
    modem panel, click on Help, click on Help for Modem Driver, and then use
    the modem search pulldown to find details.  The Port Monitor Help can also
    be used to search for an explanation to an error code.

ISDN Error Number:            Description:

IE1                           Fast busy signal and a cause value of 81 when
                              attempting a call.

IE2                           OS/2 error message informs you that the SPID is
                              rejected by the network.

IE3                           Line Active indicator in the ISDN Port Monitor
                              window does not come on.

IE4                           D channel Active indicator in the ISDN Port
                              Monitor window does not come on.

IE5                           B channel Active indicator in the ISDN Port
                              Monitor window does not come on when you attempt
                              to place or receive a call.

IE6                           B channel Active indicator is on but calls cannot
                              connect with remote device.


ΓòÉΓòÉΓòÉ 198. ISDN Error 1 ΓòÉΓòÉΓòÉ

 ISDN Error 1

Fast busy signal and a cause value of 81 when attempting a call.

Description:  Occurs only if you have configured a fixed TEI. It indicates that
there is an error in the ISDN Data/Fax Modem's ISDN configuration.

User Response:  Go the ISDN Data/Fax Modem ISDN configuration (from the ISDN
Port Monitor application).  Verify that the value entered for the SPID matches
the value received from the phone company.  Also, make sure that the TEI value
and the directory numbers you entered correspond to the configured SPID.


ΓòÉΓòÉΓòÉ 199. ISDN Error 2 ΓòÉΓòÉΓòÉ

 ISDN Error 2

OS/2 error message informs you that the SPID is rejected by the network.

Description:  Occurs only for National ISDN-1 (NI1) compliant network switches
or pre-NI-1 Northern Telecom switches.  It indicates that there is an error in
the ISDN Data/Fax Modem's ISDN configuration.

User Response:  Go to the ISDN Data/Fax Modem's ISDN configuration (from the
ISDN Port Monitor application).  Verify that the values entered for the SPID
and the directory numbers match the values received from the phone company.
Also, if you selected a fixed TEI value during the ISDN Data/Fax Modem's ISDN
configuration, make sure that the TEI value you entered corresponds to the
configured SPID.


ΓòÉΓòÉΓòÉ 200. ISDN Error 3 ΓòÉΓòÉΓòÉ

 ISDN Error 3

Line Active indicator in the ISDN Port Monitor window does not come on.

Description:  Indicates that the ISDN Data/Fax Modem is unable to synchronize
with the ISDN line.  This is caused by one of the following conditions:

ΓêÖ  Cables are not connected to the ISDN Data/Fax Modem.
ΓêÖ  Cabling from the adapter through the NT1 is not correct (most NT1s provide
LED indicators that help determine whether the NT1 is connected properly).
ΓêÖ  Incorrect settings on the NT1.

User Response:  Refer to your NT1 documentation or the Installation
Instructions that came with your ISDN Data/Fax Modem adapter for suggestions on
connecting your NT1.  Check your NT1 documentation to verify that the settings
on the NT1 are correct.


ΓòÉΓòÉΓòÉ 201. ISDN Error 4 ΓòÉΓòÉΓòÉ

 ISDN Error 4

D channel Active indicator in the ISDN Port Monitor window does not come on.

Description:  Before trying to diagnose this problem, be sure to attempt at
least one call.  In some configurations, the ISDN Data/Fax Modem will not
activate the D channel until at least one call has been attempted.  If this
indicator is still off and the Line Active indicator is on after you make a
call, the ISDN Data/Fax Modem ISDN configuration is not valid.

User Response:  Check the status window in the ISDN Port Monitor window for any
call status errors.  Check the online help to view detailed information about
any messages you see.

Other possible courses of action:

ΓêÖ  Verify that the TEI type you configured in the ISDN Data/Fax Modem's ISDN
configuration matches the TEI type you received from the phone company when you
requested ISDN service.  If the TEI type you have configured is fixed, verify
that the value you entered is correct.
ΓêÖ  If you are connected with other ISDN devices on a passive bus, make sure
that each device has a unique TEI.  Two devices cannot be assigned the same TEI
value.  If there is a conflict, change one of the devices' TEI values.  (This
problem is applicable only to FIXED TEI terminals.)
ΓêÖ  Verify that you chose the correct switch type in the ISDN Data/Fax Modem
ISDN configuration.  Review the information you received from the phone company
when you requested ISDN service to make sure that you have configured the
correct switch type.
ΓêÖ  Verify that the line is configured for the correct grade of service
(voice/data, voice only, or data only).

Note:  You can check the ISDN Data/Fax Modem's ISDN configuration through the
ISDN Port Monitor by using the Configuration option in the ISDN Port Monitor
window.


ΓòÉΓòÉΓòÉ 202. ISDN Error 5 ΓòÉΓòÉΓòÉ

 ISDN Error 5

B channel Active indicator in the ISDN Port Monitor window does not come on
when you attempt to place or receive a call.

Description:  Indicates that the D channel is active but that the network
cannot complete a call to the remote device. You will often receive a fast busy
tone if this condition exists.  This is usually caused by an ISDN configuration
error.

User Response:  Open the ISDN Port Monitor window and watch the window while
making a call.  If neither of the B channel's Active indicators come on, check
the status window for any messages.  Check the online help to view detailed
information about any messages you see.  Verify that:

ΓêÖ  The phone number you have configured matches the phone number you received
when you requested ISDN service.
ΓêÖ  Your ISDN line does not use Electronic Key Telephone System (EKTS) -- United
States only.
ΓêÖ  The grade of service you have configured (voice/data, data only, or voice
only) is correct.  Also, if the grade of service you have for your ISDN phone
line is CSD (circuit switched data, there could be errors when making calls
with the modem application driver, which should normally use CSV (circuit
switched voice) or CSV/D (circuit switched voice/data).  This is also true if
you are trying to make non-modem application driver calls, which should
normally use CSD, on an ISDN line that is configured for CSV.
ΓêÖ  Configuration overrides are incorrectly set for outgoing calls (not
applicable to the modem function).

Note:  You can check the ISDN Data/Fax Modem's ISDN configuration through the
ISDN Port Monitor by using the Configuration option in the ISDN Port Monitor
window.


ΓòÉΓòÉΓòÉ 203. ISDN Error 6 ΓòÉΓòÉΓòÉ

 ISDN Error 6

B channel Active indicator is on but calls cannot connect with remote device.

Description:  Indicates an incompatible configuration in the Mwave application
driver.

User Response:  Check the following conditions:

ΓêÖ  TCP/IP RFC mode is correctly set.  The TCP/IP Driver allows you to set the
RFC 1294 mode link (TCP/IP driver only).
ΓêÖ  Incorrect USERNAME for RFC 1294 mode link (TCP/IP driver only).
ΓêÖ  Incorrect application driver is loaded on the ISDN Data/Fax Modem.
ΓêÖ  Overrides are incorrectly set for incoming calls (not applicable to the
modem function).


ΓòÉΓòÉΓòÉ 204. Help and Service ΓòÉΓòÉΓòÉ

 Help and Service Information

Before calling your place of purchase, please prepare for your call by
following these steps:

Step 1:  Troubleshooting

If you haven't done so already, you may want to try the Problem Solving
procedures described in this online manual.  Additionally, here are a few other
things that you may want to try:

ΓêÖ  Remove and reattach all option cables.
ΓêÖ  Remove and reseat the option.
ΓêÖ  Place the option in a different slot, if one is available.
ΓêÖ  Reread any software instructions; be sure software settings are correct.
ΓêÖ  Inspect the option for damage, such as bent pins.
ΓêÖ  Check the computer manual for instructions about the installation of
upgrades. Look for a section about system setup or system configuration.
Follow all procedures.

Step 2:  Preparing for the Call

Have available as much of the following information as possible:

ΓêÖ  Option name, description, and serial number (if any)
ΓêÖ  Proof of purchase
ΓêÖ  Computer manufacturer, model, serial number, and manual
ΓêÖ  Exact wording of the error message (if any)
ΓêÖ  Description of the problem
ΓêÖ  Hardware and software configuration information for your system

If possible, be at your computer.  Your technical support representative might
want to walk you through the problem during the call.

Step 3:  Contact Your Place of Purchase


ΓòÉΓòÉΓòÉ 205. Glossary of Terms ΓòÉΓòÉΓòÉ

 Glossary of Terms

Analog
Application Driver
Asynchronous Data Link Converter (ADLC)
baud
B Channel
Bits Per Second (bps)
Channel
D Channel
Digital
DN
Group 3 Fax
High-level Data Link Control (HDLC)
Intergrated Services Digital Network
ITU-T
LED Indicators
Modem
National ISDN 1 (NI-1)
Network Termination 1
Passive Bus
protocol
Request For Comment (RFC 1294)
RJ-11 jack
RJ-45 jack
Serial Line Internet Protocol (SLIP)
Service Provider ID (SPID)
terminal
Terminal Endpoint Identifier (TEI)
Transmission Control Protocol/Internet Protocol (TCP/IP)
V.120


ΓòÉΓòÉΓòÉ 206. Application Driver ΓòÉΓòÉΓòÉ

 Application Driver

Software written to enable functions on and allow applications to access a
hardware device.


ΓòÉΓòÉΓòÉ 207. General Information ΓòÉΓòÉΓòÉ

 General Information

This section contains general information on the ISDN Data/Fax Modem.  Select
one of the following topics of interest:

Adapter Overview
ISDN Overview
Everyday Use of the PCMCIA
PCMCIA Power Requirements
Glossary of Terms
Trademarks


ΓòÉΓòÉΓòÉ 208. Adapter Overview ΓòÉΓòÉΓòÉ

 Adapter Overview

The ISDN Data/Fax Modem is an adapter that has the flexibility to provide
standard facsimile and modem functions as well as high-speed digital
communication.  Standard functions are accomplished over an analog public
switched telephone network (PSTN) line at speeds up to 28.8 Kbps.  If you
connect the ISDN Data/Fax Modem to an integrated services digital network
(ISDN) line, you can communicate with other digital devices at speeds up to 128
Kbps.

Connecting to an ISDN line does not limit you to communications with digital
devices only.  The ISDN Data/Fax Modem is capable of communicating through an
ISDN line to analog modems and Fax machines connected to an existing telephone
network.

Additionally, the ISDN Data/Fax Modem utilizes Mwave* technology.  The Mwave
technology platform, with its self-contained operating system, allows the
functionality of the ISDN Data/Fax Modem to be easily enhanced via software
upgrades.  The ability to easily upgrade the ISDN Data/Fax Modem's
functionality protects your investment in the adapter itself.


ΓòÉΓòÉΓòÉ 209. ISDN Overview ΓòÉΓòÉΓòÉ

 ISDN Overview

Integrated services digital network (ISDN) is a network architecture that uses
digital technology to support simultaneous transmission of voice, data, and
image at high speeds over regular telephone lines serviced by digital switches.
The ISDN Data/Fax Modem can communicate with devices attached to an existing
analog telephone line via conventional modems as well as with those that are
directly attached to an ISDN line.

When you order ISDN Basic Rate service for your home or business, you receive
one physical line with three logical channels.  One of the channels, called the
D Channel, is used to send data and to send and receive the information needed
for connecting and disconnecting calls.  The other two channels, called B
Channels, are used for sending voice and data.

The D channel is capable of transmitting or receiving data at 16 Kbps, while
the B channels are capable of transmitting or receiving data at 64 Kbps each.
Multiple devices can be connected to your ISDN line simultaneously.  This
configuration, known as passive bus configuration, allows the D channel to
establish a call for each B channel simultaneously (see the installation
instructions that came with your adapter for more information on a passive bus
configuration).

Note:  Due to differences in analog and digital technology, there are some
differences between dialing with your ISDN modem and dialing with your analog
modem.  These differences are described in Dialing Differences for ISDN.

The installation instructions that came with your adapter contain more
information on ISDN  Consult the installation instructions if you need more
ISDN specific information.  If you have questions that the installation
instructions can not answer or you want additional information on ISDN or the
ISDN Data/Fax Modem call (919)-254-ISDN.


ΓòÉΓòÉΓòÉ 210. Everyday Use ΓòÉΓòÉΓòÉ

 Everyday Use of the PCMCIA

There are a few things that you should know about your ISDN Data/Fax Modem in
order to get the most out of its functions and features.  Take a few moments to
read the topics in this section to become familiar with daily use of your ISDN
Data/Fax Modem.

Starting the Modem
Connecting the Adapter
Disconnecting and Storing the Adapter


ΓòÉΓòÉΓòÉ 211. Starting the Modem ΓòÉΓòÉΓòÉ

 Starting the Modem

The following information describes starting the PCMCIA version of the ISDN
Data/Fax Modem.  A detailed description of the Modem function and additional
starting procedures are described in Modem Driver.
Before you can use you modem applications, you have to start the ISDN Data/Fax
Modem.  You can choose to start the modem manually or automatically.


To start the modem manually:

 1. Insert the ISDN Data/Fax Modem adapter into an available PCMCIA adapter
    slot.

 2. Start OS/2.

 3. Locate the ISDN Data/Fax Modem group window.

 4. Select the Modem icon to enable the modem functions.  You can now use your
    modem applications.

To start the modem automatically:

Ensure that the adapter is inserted into an available PCMCIA adapter slot
before starting OS/2.

 1. Start OS/2.

 2. Open the Startup group and the ISDN Data/Fax Modem group window.

 3. Drag the modem icon to the Startup group window.  The modem will start each
    time you start OS/2.

Note:  Starting the modem automatically may put an additional drain on your
laptop's battery.


ΓòÉΓòÉΓòÉ 212. PCMCIA - Connecting ΓòÉΓòÉΓòÉ

 Connecting the Adapter

The following information describes connecting the PCMCIA version of the ISDN
Data/Fax Modem.  Use this information as a guide to connecting the adapter to
your personal computer during everyday use.  If you need additional information
on the cabling required to connect your adapter to an ISDN or an analog public
switched telephone network (PSTN), see the Installation Instructions that came
with the PCMCIA adapter.

 1. Locate the adapter connector end of your cable.  Move the latching button
    (the half-circle in the center of the adapter connector) toward the cable.
    The cable cannot be connected or disconnected unless the latch is
    retracted.

 2. Attach the cable to the adapter.  The adapter cable is keyed to attach to
    the adapter one way only.  If you feel any resistance, remove the adapter
    connector, turn it over, and reattach it.

 3. To lock the adapter cable securely, move the latching button toward the
    adapter.

    Hint:  In some cases, you may want to leave the adapter cable latch
    retracted.  If the adapter cable is pulled, it will disconnect from the
    adapter, possibly preventing your computer from being pulled off a table.

 4. Insert the adapter into an available PCMCIA adapter slot.  The adapter is
    keyed to go in one way only.  If you feel resistance before the adapter is
    fully inserted, remove the adapter, turn it over, and reinsert it.

The adapter is now connected to your personal computer and the network.


ΓòÉΓòÉΓòÉ 213. PCMCIA - Disconnecting ΓòÉΓòÉΓòÉ

 Disconnecting and Storing the Adapter

The following information describes disconnecting the PCMCIA version of the
ISDN Data/Fax Modem.  When moving your personal computer from place to place,
use the following steps to disconnect and safely store your ISDN Data/Fax
Modem.

 1. With the cable still attached to the adapter, press the eject button on the
    computer to disconnect the adapter.  Pull the adapter from the computer.

    Note:  If your computer does not have an eject button, remove the adapter
    by grasping it and pulling gently.

 2. To detach the cable from the adapter, retract the latching button (the
    half-circle in the center of the connector) by moving it toward the cable.

 3. Grasp the connector and unplug it from the adapter.  The cable is still
    connected to the telephone network.

 4. If you are taking your adapter with you to another work location,
    disconnect the adapter cables from the telephone network.


ΓòÉΓòÉΓòÉ 214. PCMCIA - Power Requirements ΓòÉΓòÉΓòÉ

 PCMCIA Power Requirements

The following information provides the power requirements for the PCMCIA
version of the ISDN Data/Fax Modem.  These requirements are:

Suspended   0mW

Minimum     400mW

RMS Power   870mW (ISDN )

RMS Power   825mW (Modem )


ΓòÉΓòÉΓòÉ 215. Trademarks ΓòÉΓòÉΓòÉ

 Trademarks

The following terms, denoted by an asterisk (*) in this online document, are
trademarks.

ΓêÖ  Digital Communications Associates, Inc.
ΓêÖ  Future Soft Engineering, Inc.
ΓêÖ  Hayes Microcomputer Products, Inc.

   HCL-eXceed/W   Hummingbird, Inc

   HyperACCESS/5  HilGraeve, Inc.

ΓêÖ  IBM Corporation

   Mwave          IBM Corporation

ΓêÖ  Microcom Systems, Inc.

   pcANYWHERE     Symantec Corporation

ΓêÖ  Datastorm Technologies, Inc.

   Qmodem         Mustang, Inc.


ΓòÉΓòÉΓòÉ 216. Applications ΓòÉΓòÉΓòÉ

 Applications

The ISDN Data/Fax Modem is a collection of application drivers.  In addition to
the application drivers, an ISDN Port Monitor is included.  The ISDN Port
Monitor controls the answering and originating of calls, and can be used to
monitor the call status associated with any application.
A key feature of the ISDN Data/Fax Modem is the fact that it can be upgraded
easily.  Once purchased, the product's function can be changed or enhanced by
simply installing new software.  Because technology changes so rapidly, this
extends the useful life of the product and avoids obsolescence. The use of
Mwave* technology makes application upgrades possible.
Because all of the application drivers use some of the same adapter resources,
only one of these application drivers can be loaded with the ISDN Port Monitor
at any time.  If you have one application driver loaded and want to run another
one, you must first unload the currently loaded driver.
The following topics contain detailed information on the application drivers
provided with the ISDN Data/Fax Modem:

ΓêÖ  ISDN Port Monitor

ΓêÖ  FAX

ΓêÖ  ProComm PLUS

ΓêÖ  Communications Applications


ΓòÉΓòÉΓòÉ 217. Port Monitor ΓòÉΓòÉΓòÉ

 ISDN Port Monitor

The ISDN Port Monitor allows you to configure the ISDN D-Channel, select any
alternate configurations (see multiple configurations) that you may have setup,
and monitor the status of the ISDN port.  In a Windows environment, the ISDN
Port Monitor also allows you to log the status of the ISDN port.

To start the Port Monitor, double-click the mouse pointer on the Port Monitor
icon.  From the Actions menu bar at the top of the ISDN Port Monitor window,
you can:

ΓêÖ  Configure an ISDN Port.  For example, if your computer's phone number needs
to be corrected, you can access the ISDN Digital Modem Configuration and make
the required change.
ΓêÖ  Select a Configuration.  For example, if you have one configuration for
working out of your office and another for working out of your home, you can
select which configuration you would like to use.


Note:  While modem applications are active on the ISDN port, the configuration
information may only be viewed.  To change the port configuration, all
applications must be closed.

Finally, the ISDN Port Monitor gives you the ability to monitor the ISDN Port
Status while applications are active.  When the configured ISDN parameters are
initially exchanged with the network, messages indicating whether the
configured values were successfully exchanged will appear in the Port Messages
portion of the ISDN Port Monitor window.  As calls are being placed and
received, the Status Messages window will be updated with the status of these
calls.

Note:  A Fax application automatically starts the ISDN Port Monitor.

The functions that can be performed using the ISDN Port Monitor are described
below.

View Call Status:
The Status Messages box in the ISDN Port Monitor window displays messages that
allow you to monitor the ISDN port.  The status of any calls placed or received
are shown in the Status Messages box.

Monitor the ISDN Port:
The Port Status indicators in the ISDN Port Monitor window allow you to monitor
the status of the ISDN port on a per channel basis.  There is a status
indicator for each of the following conditions:

L1        ISDN Line Active

D         D-Channel Active

B1        B1 Channel Active

B2        B2 Channel Active

If any of the status indicators are not on, a connection is not established.

Configure the ISDN Port:
You can use the ISDN Port Monitor to change the ISDN configuration parameters.
ISDN configuration parameters can be accessed through the Configuration option
in the ISDN Port Monitor window.  The process for changing the ISDN
configuration is the same as when you initially installed the ISDN Data/Fax
Modem.  If you need more information on configuring the ISDN Data/Fax Modem,
see the Installation Instructions that came with the adapter.

Get a Log of the Status Messages:
The ISDN Port Monitor window displays the last few status messages status
messages so that you can observe the activity of calls being placed and
received. You can scroll through the messages in the Port Monitor window, but
they are not saved.
You can have messages saved to a log by selecting Actions from the ISDN Port
Monitor window, and then selecting Enable Logging.  Messages saved in the log
will be listed with the time and date that they occurred.


ΓòÉΓòÉΓòÉ 218. Fax ΓòÉΓòÉΓòÉ

 Fax

The Fax application (packaged with the adapter) enables you to send Fax files
to a standard (G3) Fax machine or a Fax/Modem device connected to the telephone
network.  Fax files can also be received from a standard Fax machine or
Fax/Modem device connected to the telephone network.

To install the Fax application, follow the instructions provided with the
application.  After installing the Fax application, select the Fax icon. The
Fax application will be loaded and you can begin.

Refer to the documentation packaged with the Fax application software for
details about selecting a file for transfer and displaying or printing a file
that has been received.


ΓòÉΓòÉΓòÉ 219. ProComm PLUS ΓòÉΓòÉΓòÉ

 ProComm PLUS For Windows

To ensure proper application-to-application connections using ProComm,
configure ProComm as follows:

Default Baud Rate:  115200 bps

Auto Baud Select:   Off  (NOT selected)

Problems avoided with this setup:

 1. Asynchronous communication devices cannot connect at speeds greater than
    the UART (baud) speed.  To connect at 64000, the UART must be configured
    for 64000 or greater.  The only choice in ProComm that allows V.120 to
    connect is 115200 bps.

 2. If  ProComm's Auto Baud Detect  is on, ProComm will  make connections only
    at its pre-anticipated (exact) speeds of 300, 1200, 2400, 9600, 14400,
    19200, 38400, or 57600 bps.

If the line connects at 56000 or 64000, ProComm will not recognize the connect
speed and will disconnect the call. This problem can be avoided by turning Auto
Baud Detect OFF in the Modem setup section of the advanced connection setup.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Use Selected Configuration

The Use Selected Configuration option allows you to activate a configuration
that you have selected from the list of possible configurations.  The selected
configuration will take effect when you click on OK.  You can also use a
configuration by double- clicking on the entry in the list box.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Edit Selected Configuration

The Edit Selected Configuration allows you to edit a configuration.  For
example, you may want to edit a configuration that you named ISDN2 to change
the TEI value.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Create New Configuration

The Create New Configuration option allows you to define a new set of
parameters to support your port connection.  For example, you may be
temporarily setting up your computer in another location that requires a set of
parameters that are different from the parameters required for your primary
location.  In such a case, you would want to create a new configuration while
still maintaining the old configuration.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Delete Selected Configuration

The Delete Selected Configuration option allows you to remove a configuration
that you no longer need.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Analog

Pertaining to data consisting of continuously variable physical quantities.
Contrast with Digital.  In this online document, analog refers to conventional
telephone service.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Asynchronous Data Link Converter

The Asynchronous Data Link Converter (ADLC) is an application that allows you
to choose HDLC or  TCP/IP drivers for use in your network.  The ADLC icon in
the ISDN Data/Fax Modem group window provides access to the HDLC and TCP/IP
drivers.
See Async-to-Sync Driver for more information.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Baud

The rate at which signal conditions are transmitted per second.  Contrast with
Bits Per Second (bps).


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

B Channel

64-bps "bearer" channel used for voice, circuit or packet switched data.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Bits Per Second (bps)

The rate at which bits are transmitted per second.  With "K" (meaning 1000), 1
Kbps means a rate of 1000 bits per second.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Channel

A path along which signals can be sent.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

D Channel

The ISDN channel that carries signaling information to control the call setup,
teardown, or invocation of supplementary services.  The D Channel may also be
used to provide Packet Mode Data Service.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Digital

(1) Pertaining to data in the form of digits.  Contrast with Analog.  (2)
Pertaining to data consisting of numerical values or discrete units.  In this
online document, digital refers to ISDN networks.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

DN

A directory number, subscriber number, or telephone number.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Group 3 Fax (G3 Fax)

A protocol for the transmission of facsimile through the analog telephone
network.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

High-level Data Link Control (HDLC)

A synchronous bit-oriented protocol used for communicating high-speed data
between two synchronous devices over a wide area network.

See HDLC - ASYNC to SYNC Driver for more information.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Integrated Services Digital Network (ISDN)

An international standard defined for an all-digital network providing
end-to-end digital connectivity to support a wide range of voice and non-voice
(data and video) services.

See ISDN Overview for more information.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

International Telecommunications Union-Telecommunications

International Telecommunications Union-Telecommunications (ITU-T)  is an
organization within the United Nations charged with making recommendations
regarding telecommunications.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

LED Indicators

Indicators that provide a visual status of the operations or states that the
modem is engaged in.  Modem LED Indicators provides a visual representation of
the modem LEDs and allows you to view a description of the operation or state
associated with each LED.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Modem (modulator/demodulator)

A device that converts digital data from a computer to an analog signal that
can be transmitted in a telecommunication line, and converts the analog signal
received to data for the computer.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

National ISDN-1 (NI-1)

The Bellcore/Regional Bell Operating Companies defined protocols and services
on the basic rate interface.  It is the first step in establishing a uniform
ISDN definition for the US and it allows NI-1 compliant ISDN devices to connect
to any switch that supports NI-1, regardless of the manufacturer.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Network Termination 1 (NT1)

A unit that provides physical and electromagnetic termination of the
U-interface two-wire transmission line, converts between layer 1 formats used
at the U and T reference points, and performs some maintenance functions.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Passive Bus

The customer premises wiring that allows multiple ISDN devices to be connected
to an ISDN line.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Protocol

A set of semantic and syntactic rules that determines the behavior of
functional units in achieving communication.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Request For Comment 1294 (RFC1294)

A communications standard for sending multiple protocols over a frame relay
network.  The ISDN Data/Fax Modem provides a limited implementation of this
standard for communication over ISDN.

Note:  RFC1294 has been replaced by RFC1490.  The term RFC1294 will continue to
be used due to historical significance.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

RJ-11 Jack

A four pin modular connector used to physically connect an NT1 to an ISDN line
at the U-Interface, or to connect a modem to an analog telephone line.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

RJ-45 Jack

An eight pin modular connector used to physically connect to an NT1 at the
S/T-Interface.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Serial Line Internet Protocol (SLIP)

An asynchronous protocol used for sending Internet Protocol data through a
serial (COMM) port.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Service Provider ID (SPID)

A parameter provided by the telephone company when requesting ISDN service.  It
associates an ISDN directory number with a specific profile of service
characteristics stored within the network.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Terminal

A device attached to the end of an ISDN line.  Also known as terminal equipment
(TE) or terminal equipment type 1 (TE1).


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Terminal Endpoint Identifier (TEI)

A value used to identify a specific connection endpoint within a service access
point.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

Transmission Control Protocol/Internet Protocol (TCP/IP)

A set of protocols that allow cooperating computers to share resources across a
heterogeneous network.  Typically, this protocol is used for communicating over
the Internet network.

See TCP/IP Driver for more information.


ΓòÉΓòÉΓòÉ <hidden>  ΓòÉΓòÉΓòÉ

V.120

Terminal rate adaptation protocol for the B Channel.

See V.120 Driver for more information.