home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Software Vault: The Gold Collection
/
Software Vault - The Gold Collection (American Databankers) (1993).ISO
/
cdr11
/
sp144man.zip
/
FIVE.TXT
< prev
next >
Wrap
Text File
|
1993-04-19
|
20KB
|
542 lines
SPORTSTER 14,400
CHAPTER 5. INTERNAL CONTROLS
The commands explained in this chapter
are of two types. The first group
concerns default configurations, for
example, writing your own power-on
defaults to nonvolatile random access
memory (NVRAM). The remaining commands
are used to select the modem's local
operating characteristics, for a current
session or to include in your default
configuration. They include result
codes, echoing, and other options.
NOTE: When you change a default setting
during a session, the modem retains that
setting until you do one of the
following.
∙ Change the setting again.
∙ Issue the ATZ command to reset the
modem to its software defaults. If
DIP switch 7 is UP, the modem
resets to the defaults stored in
nonvolatile memory (NVRAM). If DIP
switch 7 is DOWN, the modem resets
to the factory settings stored in
read only memory (ROM).
∙ Issue the AT&F command to load the
modem's factory settings.
∙ Turn the computer off and power it
on again. At power-on, the modem
loads either the nonvolatile
memory defaults (DIP switch 7 UP)
or the factory settings (DIP
switch 7 DOWN).
SETTING/USING DEFAULTS
The modem's read only memory (ROM)
permanently stores the modem's factory
settings. The inclusion of nonvolatile
random access memory (NVRAM) allows you
to define your own configuration and
write the settings to NVRAM as your
power-on defaults.
Writing Defaults to NVRAM (&W)
When you power on the Sportster 14,400,
it loads the settings stored in NVRAM if
DIP switch 7 is UP (factory setting).
Until
you write your own settings to NVRAM,
the defaults stored there are the same
as the permanent ROM factory settings.
You'll find a list of NVRAM options and
factory settings in Appendix B. You can
also display them by selecting option 5
of the I (inquiry) command.
ATI5 <Enter>
If you've sent the modem commands to
change settings through-out your session
and want to save your current
configuration, send just the &W command.
The current settings are written to
NVRAM.
AT&W <Enter>
You may also specify the entire
configuration in a single command string
that ends with the &W command. The
following example sets the modem for the
current session and stores the
configuration in NVRAM.
AT X4 &B1 &H1 M3 &W <Enter>
After sending a configuration to NVRAM,
you can change any setting just for the
current session, as in the following
example. The NVRAM configuration
remains intact.
ATX3 <Enter>
But if you want the new setting to be a
default, write it to NVRAM at the same
time, as in the following example. X3
is substituted for the X4 setting stored
earlier.
AT X3 &W <Enter>
Loading the Factory Defaults (&F)
If DIP switch 7 is DOWN, the permanent
read-only factory settings are loaded at
power-on instead of the NVRAM defaults.
Factory settings for the options that
are stored in NVRAM are in Appendix B.
If the NVRAM defaults are loaded at
power-on (DIP switch 7 UP) and you want
to load the factory defaults instead,
use the following command.
AT&F <Enter>
If NVRAM defaults are loaded, but you
want to view a screen listing of factory
defaults, first load them (&F), to make
them the current settings. Then include
the I4 inquiry option to display a
listing of the new settings, as in the
following example.
AT&F I4 <Enter>
To restore your NVRAM defaults, use the
ATZ command described next. (DIP
switch 7 must be UP.)
Reset (Z)
If you've changed several current
settings and want to reset to your power-
on defaults, type the following command.
ATZ <Enter>
The modem reads its DIP switch settings
and resets either to its NVRAM defaults
(DIP switch 7 UP) or factory settings
(DIP switch 7 DOWN).
NOTE: Use the ATZ command if you've
changed the position of DIP switches
2O5 while the modem is on, so that the
modem can read the new settings. The
only other way to initiate a new set
ting for switches 2O5 is to turn the
modem off and on again.
Storing a Phone Number (&Zs)
You can store your most frequently
dialed phone number in NVRAM. Use the
&Zs command, where s is the phone-number
string of the remote modem.
The number string may be up to 36
characters long, including any Dial
command options. The following example
includes the
tone-dial (T) and wait for a second dial
tone (W) options of the Dial command.
AT&ZT9W5551234 <Enter>
The following example stores a long-
distance number. We've added spaces for
readability.
AT&Z 1 516 555 1234 <Enter>
The DS command is used to dial the
stored number.
ATDS <Enter>
NOTE: Do not include modem settings in
the &Z string. If the call requires a
special setting, insert it in the
command string before the DS command.
In the following example, &M0 (no error
control) is inserted before the Dial
command.
AT&M0 DS <Enter>
This establishes &M0 as the current
setting. To return to default error-
control mode after the call, issue the
following command.
AT&M4 <Enter>
RESULT CODES
Four commands control the result codes
that the modem returns to the screen.
Vn Numeric/verbal response mode
Qn Display/suppress all result
codes
Xn Result code options
&An Display/suppress additional
result code options
Response Modes (Vn)
Result codes are sent to the screen in
either words (Verbal mode) or numbers
(Numeric mode). The Sportster 14,400 is
factory-set to Verbal mode when it is
powered on (DIP switch 2 is UP). Use
the Vn command to select verbal or
numeric result codes for a current
session, independently of the DIP switch
setting.
At power-on and reset, the modem
operates according to the DIP switch
setting. The Vn command is not stored
in nonvolatile memory as a power-
on/reset default.
V0 Numeric mode. Numeric result codes
are followed by a Carriage Return
but no Line Feed, as in the
following example, where a 3 is
returned (for NO CARRIER).
ATD1234567 <Enter>
becomes
3TD1234567 <Enter>
V1 Verbal mode. Verbal responses are
preceded and followed by a Carriage
Return and a Line Feed, as shown
below.
ATD1234567 <Enter>
NO CARRIER
Quiet Mode (Qn)
Enable/suppress the display of result
codes. The Sportster 14,400 is shipped
with DIP switch 3 DOWN, to display
result codes. Use the Qn command to
control the display for a current
session, independently of the switch
setting.
At power-on and reset, the modem
operates according to the DIP switch
setting. The Qn command is not stored
in nonvolatile memory as a power-
on/reset default.
Q0 Result codes are displayed.
Q1 Result codes are suppressed (made
quiet).
Q2 Result codes are suppressed only in
Answer mode.
Result Code Options (Xn)
You have five options, X0 through X4,
for selecting the result code set best
suited to your applications, as shown in
Table 5.1 on the next page. Definitions
are listed in Table 5.2.
X0 Basic set, returns the first five
codes (0O4) in the following table.
X1 Extended set, codes 0O5, 10, 13 and
18, that adds rate-specific CONNECT
messages to the Basic set.
Default. This set also includes
all &A result codes.
X2-4These options include the X1 set,
call-progress codes 6 or 7, and 8,
and the functions listed in the
table.
Table 5.1_Result Code Options
Setting
Result Codes X0 X1X2 X3 X4
0/OK · · · · ·
1/CONNECT · · · · ·
2/RING · · · · ·
3/NO CARRIER · · · · ·
4/ERROR · · · · ·
5/CONNECT 1200 · · · ·
6/NO DIAL TONE · ·
7/BUSY · ·
8/NO ANSWER · ·
10/CONNECT 2400 · · · ·
13/CONNECT 9600 · · · ·
18/CONNECT 4800 · · · ·
20/CONNECT 7200 · · · ·
21/CONNECT 12000 · · · ·
25/CONNECT 14400 · · · ·
Functions
Adaptive Dialing · · ·
Wait for 2nd Dial Tone (W)
· ·
Wait for Answer (@) ·
·
Fast Dial · ·
NOTE: Additional CONNECT messages
indicate an error-control
connection, the modulation for a
call, or the type of error control
and data compression used. See
Additional Result Code Options
(&An), following this section.
Table 5.2_Result Code Definitions
Result Code Meaning
0/OK Command has been executed
1/CONNECT Connection established with
another modem; if set to X0,
connection may be at 300, 1200,
2400, 7200, 9600, 12K or 14.4K
bps; if X1 or higher, connection
is at 300 bps
2/RING Incoming ring detected
3/NO CARRIER Carrier detect has failed or
carrier has been dropped due to
disconnect
4/ERROR Command is invalid
5/CONNECT 1200 Connection established with
another modem at 1200 bps
6/NO DIAL TONE Dial tone not detected during
the normal 2 seconds, set in
Register S6
7/BUSY Busy signal detect; modem hangs up
8/NO ANSWER After waiting 5 seconds for an
answer, modem hangs up; returned
instead of NO CARRIER when the @
option is used
10/CONNECT 2400 Connection established with
another modem at 2400 bps
13/CONNECT 9600 Connection established at
reported rate. Same meaning for
results of 4800 (18), 7200 (20),
12K (21) and 14.4K (25) bps
Adaptive Dialing The modem attempts to use
Touch-Tone dialing and, if that
doesn't work on the line, reverts
to rotary dialing.
Wait for Another The modem continues dialing
as soon as it detects another
Dial Tone (W)dial tone. See the dial
options in Chapter 6.
Wait for an The modem continues dialing when
it detects 5 seconds of
Answer (@) silence on the line. See the
dial options in Chapter 6.
Fast Dial The modem dials immediately on
dial-tone detect, instead of
waiting the normal 2 seconds set
in Register S6. See S-Registers
in Appendix B.
Additional Result Code Options (&An)
Use this command to enable/disable one
of the following sets of error control,
modulation or protocol result codes.
&A0ARQ (error-control) codes are
disabled. This setting does not
affect an error-control connection;
the modem returns standard CONNECT
messages if result codes are
enabled.
If you select &A0 and then encounter
software problems, it may be
because your software expects to
find the default &A1 result codes.
For example, some communications
software allows you to specify in
the setup program the model of
USRobotics modem you are using.
The software then tries to use the
default settings for that modem; a
discrepancy from the defaults may
cause problems. Review your
software documentation, and set the
modem to &A1 if necessary.
&A1ARQ codes are enabled. Default.
One of the results below is shown
when a successful error-control
connection is established.
CONNECT/ARQ is displayed if the mo
dem is set to X0 (see the next
section) and the connection is
between 1200 to 14.4K bps. The
remaining results indicate
connection rate and require X1
(default) or above. If your
software cannot handle the ARQ
codes, select &A0.
14/CONNECT/ARQ 19/CONNECT
4800/ARQ
15/CONNECT 1200/ARQ 24/CONNECT
7200/ARQ
16/CONNECT 2400/ARQ 22/CONNECT
12000/ARQ
17/CONNECT 9600/ARQ 26/CONNECT
14400/ARQ
&A2V32 modulation codes are enabled.
These results require a setting of
X1 or higher. If your software
cannot handle the added modulation
information, select &A1 or &A0.
33/CONNECT 9600/V32 41/CONNECT
12000/V32
37/CONNECT 9600/ARQ/V3242/CONNECT
12000/ARQ/V32 38/CONNECT
4800/V32 44/CONNECT
7200/ARQ/V32
39/CONNECT 4800/ARQ/V3245/CONNECT
14400/V32
40/CONNECT 7200/V32 46/CONNECT
14400/ARQ/V32
&A3Protocol codes are enabled. Error-
control protocols reported are LAPM
or MNP. When the call is not under
one of those protocols (and ARQ is
not included in the result code),
the modem reports NONE, for no
protocol.
If the modems are using data
compression, the type of
compression, V42BIS or MNP5, is
added to the result code. In the
first of the following examples,
the modems negotiated error control
for the call (ARQ), used V.32 bis
modulation, are using the LAPM
error-control protocol, and are
using V.42 bis compression.
CONNECT 14400/ARQ/V32/LAPM/V42BIS[or
MNP/MNP5]
CONNECT 9600/ARQ/V32/LAPM/V42BIS[or
MNP/MNP5]
CONNECT 4800/ARQ/V32/LAPM/V42BIS[or
MNP/MNP5]
CONNECT 2400/ARQ/MNP/MNP5[or LAPM/V4
2BIS]
CONNECT 2400/NONE
Although these codes will return
numeric identifiers if DIP switch 2
is DOWN or you've set the modem to
V0, they are the same numeric
identifiers used for &A2 result
codes. If you want &A3 protocol
indicators, use Verbal mode (V1),
and not Numeric mode (V0).
If your software cannot handle the
added protocol information, select
&A2, &A1 or &A0.
LOCAL ECHO
Local echo is the display of what you
type at the keyboard and data the
Sportster 14,400 transmits to another
modem. The En command controls the
display of your typed commands, when
the modem is in Command mode. The Fn
command applies when the modem is
online to another system.
Command Mode Local Echo (En)
The Sportster 14,400 is shipped with DIP
switch 4 UP, enabling local echo. The
En command controls the local echo for a
current session, independently of the
switch setting. At power-on and reset,
the modem operates according to the DIP
switch setting.
The En command is not stored in
nonvolatile memory as a power-on/reset
default.
E0 Command Mode echo OFF. The modem
does not display keyboard commands.
E1 Command Mode echo ON.
NOTE: If double characters appear on
the screen, both the modem's local echo
and your software's local echo are on.
Online Local Echo (Fn)
This command causes the modem to display
a copy of the data it is transmitting to
another system. Many systems, however,
return a copy of received data, which is
called a remote echo. If the modem's
online echo is ON and there is also
remote echoing, double characters appear
on the screen.
In some microcomputer documentation, the
term duplex is applied to local online
echoing, although the term is not techni
cally accurate.
F0 Online echo ON. Sometimes called
half duplex. As the modem transmits
data to a remote system, it also
sends a copy of the data to the
screen.
F1 Online echo OFF. Sometimes called
full duplex. Default.
THE AUDIO MONITOR
The modem's speaker enables you to
monitor the dial-connect process. There
are several ways to make use of this
feature. After the Sportster 14,400
dials a number, it waits up to 60
seconds for a high-pitched answer tone
from the other modem, immediately
followed by data signals, called a
carrier. These signals must occur
before a data link is established.
At the default X1 setting, if someone
answers the phone or if the line is
busy, the modem sends you the NO CARRIER
message after 60 seconds. If you listen
to the speaker, you can respond
immediately, instead of waiting for the
modem to time out, by pressing any key
on the keyboard. This cancels the call.
You can also hear if dialing is
proceeding too quickly for the system.
Terminate the call (press any key) and
retype the Dial command, but insert a
comma (,) or a couple of slashes (/),
to have the modem pause during the
dialing process.
Speaker Control (Mn)
This command disables the speaker
entirely or sets the speaker to monitor
different segments of the dial-connect
sequence.
M0 This setting disables the speaker
entirely so that you don't hear the
modem go off hook, dial, etc.
M1 The speaker is ON until Carrier
Detect. Default. You can monitor
call progress until the Sportster
14,400 detects the remote modem's
carrier signals, or until the 60-
second timeout and result code
display. At Carrier Detect, the
modem disconnects the speaker and
data transmission sounds are
suppressed.
M2 The speaker is ON continuously,
including during data transmission.
M3 The speaker doesn't go ON until
after the last digit is dialed,
then goes OFF at Carrier Detect.
S-REGISTERS
The S-Registers are used to set various
timing parameters, redefinition of
selected ASCII characters, and other
configuration options. The defaults
reflect typical requirements.
A detailed summary of the S-Register
functions is in Appendix B. A less
detailed summary is in the Quick-
Reference card.