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READ-ME
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"READ-ME" FILE - CO/SESSION VERSION 3.0 March 29, 1988
Welcome to version 3.0 of CO/SESSION. This file supplements
the current User's Guide with the new features, enhancements,
and corrections which have occurred since our last document
release.
The following topics are discussed below:
o DEMONSTRATION VERSION RESTRICTIONS
o USER REGISTRATION CARDS
o COMPATIBILITY WITH EARLIER CO/SESSION VERSIONS
o INSTALLING CO/SESSION FROM A: OR B: DRIVE
o INSTALLING CO/SESSION ON A SINGLE DRIVE SYSTEM
o NOVELL NETWORKS
o ALLOY PC-PLUS SLAVE CARDS
o SUPPORT KEYBOARD COMMANDS
o ENHANCED SECURITY
-Dial-Back
-File Transfer Access Rights
-Directory Access Restriction
o FILE TRANSFER OVERWRITE VERIFICATION
o DATA COMPRESSION AND FILE TRANSFERS
o BACKGROUND COMMUNICATIONS
o VOICE FIRST
o COM PORT WINDOW
o DIRECT CABLE CONNECTIONS
o ADDITIONAL MODEM SUPPORT
o COM3 and COM4 SUPPORT
o TTY TERMINAL EMULATION
o CONFIGURATION SETTINGS
o ANSI.SYS and SIMILAR DEVICE DRIVERS
o REMOTE PRINTING
o MAKING APPLICATION PRINT MODE PERMANENT
o UNATTENDED REMOTE ACCESS
o THE DEFAULT CALL ID RECORD
o QUICK CONNECTIONS TO A PRIMARY SITE
DEMONSTRATION VERSION RESTRICTIONS
Your CO/SESSION(tm) demonstration version is the full CO/SESSION
version, and all features and functions of the full version are
available. However, there are several constraints on the
demonstration version which distinguish it from the full
CO/SESSION version.
The constraints on the CO/SESSION demonstration version are:
(1) the maximum total connect time allowed is approximately
15 minutes; you can use the 15 minutes on one connection
or on several connections less than 15 minutes; once the
total 15 minutes of allowable connect time is used; no
subsequent connections are permitted; if you are currently
connected, you are warned of the approaching 15 minute limit
and when reached, the connection is terminated; you must
reboot and reload the CO/SESSION demonstration version to
get another 15 minutes of connect time;
(2) the maximum number of Call IDs permitted is 2;
(3) the maximum file size permitted to be uploaded or downloaded
from a remote CO/SESSION machine is 5000 bytes; after
5000 bytes the file transfer is terminated;
(4) password sending/checking is not supported, so the security
features such as Dial-Back and File Transfer Access rights
are not functional;
(5) remote printing is inhibited.
USER REGISTRATION CARDS
Please fill out your User Registration Card in the back of the
User Guide so that we may inform you of upcoming new releases
and products.
COMPATIBILITY WITH EARLIER CO/SESSION VERSIONS
Version 3.0 incorporates enhanced screen data compression
techniques which result in a faster Support PC screen update
versus earlier CO/SESSION versions.
An older Application IS compatible with a 3.0 Support. However,
a 3.0 Application is NOT compatible with an older Support.
INSTALLING CO/SESSION FROM AN A: OR B: DRIVE
INSTALL has been updated so that you may install
CO/SESSION from floppy drive A: or B:. You may type
"A:INSTALL" or "B:INSTALL" depending on which floppy
drive has the CO/SESSION master diskette.
INSTALLING CO/SESSION ON A SINGLE DRIVE SYSTEM
Follow the instructions below for installing CO/SESSION on a
PC with only a single disk drive.
1) Create a copy of the original diskette and store the
original in a safe place.
2) Create the file "session.bat" on the newly created
CO/SESSION diskette. The file will include the following
information for either loading the support or application
versions of CO/SESSION.
SESSION.BAT - Support Version
echo off
a:support -ea:\ -da: -p\
SESSION.BAT - Application Version
echo off
a:applica -ea:\ -da: -p\
To invoke CO/SESSION, place the newly created CO/SESSION
diskette in the drive and type "session". CO/SESSION will
be loaded into memory and available for use.
NOVELL NETWORKS
When using CO/SESSION on a Novell network rename the file
"session.bat" to prevent any conflicts with Novell's "session"
command.
"Session.bat" is created during the CO/SESSION installation
process and specifies proper disk, directory and path
information for loading CO/SESSION.
ALLOY PC-PLUS SLAVE CARDS
CO/SESSION works with ALLOY's PC-PLUS network slave card
and NTNX software product, but with some limitations. CO/SESSION
must be loaded into one of the slave card "partitions" rather than
at the "main console", and an external modem only can be supported
by plugging into COM2, the DB-25 pin port of the slave card. The
cable between the modem and the COM2 port should have pin-22
disabled to prevent a reboot of the slave card when the modem
answers a dial-in. COM1 on the slave card is a DB-9 pin port and
is used for connecting a terminal. CO/SESSION can be automatically
loaded by placing the command to load CO/SESSION ("SESSION") into
the AUTOEXEC file associated with the slave card, for example,
"AUTOEXE.U01".
CO/SESSION can be loaded from the "main console" into a slave card
by using the NTNX command program, "C". You activate this by
pressing <Alt><F10>. After pressing <Alt><F10>, type <C>, then
respond with the user number for the slave card, then type
the CO/SESSION load command, "SESSION".
SUPPORT KEYBOARD COMMANDS
From the SUPPORT PC, either <Ctrl><Alt> or <Ctrl><LeftShift> in
conjunction with:
<R> - causes SUPPORT PC screen redraw;
<F> - causes APPLICATION PC to run in "full-speed" mode;
<S> - causes APPLICATION PC to run in "synchronized" mode;
<T> - causes APPLICATION PC to run in a "fast-graphics"
mode, which if in a CGA graphics mode results in
every other line of screen graphic data to update
the SUPPORT PC;
<M> - causes APPLICATION PC to process the display
screen according to the Video Mode Synchronize
parameter in the configuration settings; this is
useful when using programs that change the video
mode without following the "normal" rules so
that CO/SESSION cannot automatically detect the
video mode change.
ENHANCED SECURITY
Several new security features have been added so that you may
customize and provide the level of security you require.
(1) Dial-Back
There is now a "Dial-Back" feature that you may set on an
individual Call ID basis. It will disconnect and call back a
remote user at a predefined telephone number when that remote
user attempts to connect to your computer.
To use the "dial-back" feature, you must have the Password
Protection Checking option <M>, in the configuration settings,
set to YES; next, in the Call ID parameter record where you
have defined the expected Login and Password for the remote
user, set the "Dial-Back" field option to YES; and then
define the remote CO/SESSION user's telephone number in
the telephone number field of the Call ID parameter record.
(2) File Transfer Access Rights
There is now a feature that permits you to define on an
individual Call ID basis, what file transfer access rights
you want the remote CO/SESSION user to have in accessing
your computer. You may define ALL transfer rights allowed,
NONE allowed, SEND ONLY to your computer, or RECV ONLY from
your computer. The file transfer rights are defined from the
perspective of the remote CO/SESSION user.
To use the "file transfer access rights" feature, you must have
the Password Protection Checking option <M>, in the configuration
settings, set to YES; next, in the Call ID parameter record where
you have defined the expected Login and Password for the remote
user, set the "File Transfer Rights" field option to ALL, NONE,
SEND ONLY, or RECV ONLY.
(3) Directory Access Restriction
There is now a feature that allows you to restrict the access
of the remote CO/SESSION user to particular drives and directories
on your computer. This feature is further described below as
the <U> option in the Configuration Settings.
FILE TRANSFER OVERWRITE VERIFICATION
On all CO/SESSION file transfers, if the destination file already
exists, you are prompted to verify before the transfer is started
that it is OK to overwrite the destination file.
DATA COMPRESSION AND FILE TRANSFERS
CO/SESSION's file transfer protocol automatically utilizes a
very efficient data compression algorithm to increase the file
transfer rate, saving time and money. There is no need to
use additional utilities such as "arc" or "squeeze" to compress
your files before using CO/SESSION's file transfer.
BACKGROUND COMMUNICATIONS
A CO/SESSION support user can transfer, display or delete
files on an application user's PC "in the background" while
the application user is running a program "in the
foreground".
Once connected, the support user can display the CO/SESSION
File Functions Submenu and initiate file transfers or
other functions while the application user continues running
his current program.
VOICE FIRST
This feature lets you make a voice telephone connection with
the remote user, or to a switchboard operator, and then at any
time after, switch to a CO/SESSION data connection without having
to hang-up and redial. This requires that the modems each of you
are using are connected to the same line as your telephone. Most
modems have a separate jack in the back where you can plug in your
telephone. For those that do not, you can use a y-connector to
plug both your telephone and modem to the same wall jack.
With this feature, it is not even necessary to have CO/SESSION
loaded when you first make the voice connection. You can also
use this feature to call through a switchboard to reach a remote
PC that is unattended. As long as the remote unattended PC has
CO/SESSION loaded and is in auto-answer mode, or you are using
a power-on device with it (see UNATTENDED REMOTE ACCESS below),
after the switchboard operator connects you through to the
unattended location, follow the same steps described below.
When you and your remote user are both ready to switch to a
CO/SESSION data connection, do the following:
(1). If CO/SESSION is not already loaded, do so now.
(2). Bring up the CO/SESSION Main Menu on both computers.
(3). Press the <F7> function key (Voice/Data Toggle).
If you are currently the SUPPORT type, you are
prompted as to whether you are going to remain
as the SUPPORT type. You respond with 'Y' or 'N',
for yes or no. One of you must be an APPLICATION
type, and the other must be the SUPPORT type. If
you respond 'Y' to the prompt, CO/SESSION assumes
the other user is the APPLICATION.
(4). Next, listen in your telephone handset for the modem
tones. If the connection between the modems is
successful, CO/SESSION tells each of you with a
notification message, and then automatically starts
the login procedure. If all is successful, the
SUPPORT user's PC screen is updated with the
APPLICATION user's PC screen data. At this point,
hang-up the telephone handsets.
(5). If the modems do not successfully connect, you should
still have your voice connection. Try it again until
you successfully get the modems to connect.
You must have the port parameters of the Call ID DEFAULT set
to the port, baud-rate, modem type, and terminal type that you
are using so CO/SESSION knows what to use when you press <F7>.
See THE DEFAULT CALL ID RECORD section below.
COM PORT WINDOW
This feature is available as <F4> on the Communications Menu
and provides a pop-up window where you may type any commands
or data that you require directly to the communication port.
The COM port and baud-rate used is that which is defined in
the Port Parameters of the Call ID selected when you press
<F4>. This feature, available when you are not yet connected,
is useful for providing communication directly to the attached
modem or PBX device. Thus, with this feature, you may use any
non-Hayes compatible modem with CO/SESSION, or you may
command your PBX to connect you to the modem pool.
When you select this function, the Data Terminal Ready (DTR)
signal is raised high by CO/SESSION, and when you exit the
COM Port Window, DTR is left high. To reset, you can press
<F6> Disconnect/Hangup. When you exit the COM Port Window,
you may then use the <F1> Call or <F2> Wait For Call functions
to make a CO/SESSION connection.
If you have used the COM Port Window to dial a non-Hayes modem
and connect to the remote modem, use <F1> Call function with
the modem type in the Call ID you have selected set to
"Direct Cable" to start the automatic CO/SESSION login
connection sequence.
If you have used the COM Port Window to connect to your modem
pool through your PBX, use <F1> Call function with the modem
type in the Call ID you have selected set to the Hayes or
compatible modem you are using and let CO/SESSION dial for you.
DIRECT CABLE CONNECTIONS
The minimum direct cable wiring requirement is now pins 2 & 3
reversed, that is, pin 2 on one end goes to pin 3 on the
other end, and pin 3 goes to pin 2; however, if you also
reverse pins 6 and 20, disconnects from the other computer are
detected by CO/SESSION.
ADDITIONAL MODEM SUPPORT
Additional modem types have been added, and the complete
modem list now appears in a pop-up window when you are at
the Call ID parameter screen and you select the Modem Type
parameter option by pressing the <M> key.
For the MICROCOM-AX series of modems, set the front switches
2 and 8 down, and set the rear switches 6 and 7 down, all
other switches up.
COM3 and COM4 SUPPORT
Support for communication ports COM3 and COM4 has been added;
COM3 is defined as using IRQ4 and port address 3E8; COM4 is
defined as using IRQ3 and port address 2E8.
It is possible to patch the appropriate CO/SESSION tables if
you want to use a different IRQ and/or port address. The
procedure is as follows:
(1) Copy the SUPPORT.EXE or APPLICA.EXE to another file
with the name SUPP or APPL, without the ".EXE"
extension.
(2) Use DEBUG.COM that comes with DOS to load and patch
the file, type the following:
debug supp<Enter> or debug appl<Enter>
(3) At the DEBUG prompt, which is a minus sign ( "-" ),
locate the appropriate tables; first, determine the
value of the CS register using the "R" command;
second, add 1000 hex to the value of CS to determine
the segment; then, display the tables with the
appropriate offset using DEBUG's display memory
command; the offset for SUPP is E0E0 hex; the offset
for APPL is 3C80 hex; for example, type the following:
R<Enter> ;display registers, assume CS=2A42
D 3A42:E0E0<Enter> ;CS+1000 and offset for SUPP
The data displayed is defined as follows:
offset+0 = COM1 interrupt vector number = 0C
offset+1 = COM1 mask for the IMR = 10
offset+2 = COM2 interrupt vector number = 0B
offset+3 = COM2 mask for the IMR = 08
offset+4 = COM3 interrupt vector number = 0C
offset+5 = COM3 mask for the IMR = 10
offset+6 = COM4 interrupt vector number = 0B
offset+7 = COM4 mask for the IMR = 08
offset+8 = COM1 port address = F8 03
offset+A = COM2 port address = F8 02
offset+C = COM3 port address = E8 03
offset+E = COM4 port address = E8 02
(4) Based on the IRQ you want to use, get the proper values
from below, then patch the table for the port that you
want to redefine; the values are as follows:
IRQ 5 - interrupt vector number = 0D
- mask for the IMR = 20
IRQ 4 - interrupt vector number = 0C
- mask for the IMR = 10
IRQ 3 - interrupt vector number = 0B
- mask for the IMR = 08
IRQ 2 - interrupt vector number = 0A
- mask for the IMR = 04
(5) Patch the tables using the DEBUG "E" command; for
example, if you want to set up COM3 to use IRQ2 and
port address 3C8 in the SUPP version, and CS=2A42,
you would type the following;
E 3A42:E0E4<Enter> ;DEBUG will display the value
at the location and allow
you to change it; type the new
value followed by space to
get the next location;
0A<SpaceBar> ;default value should be 0C
04<Enter> ;default value should be 10
E 3A42:E0EC<Enter> ;change the port address for
COM3
C8<SpaceBar> ;default value should be E8
03<Enter> ;default value should already
be 03
(6) Finally, write the changes back to disk using the
DEBUG "W" command and quit DEBUG; type the following:
W<Enter>
Q<Enter>
Then, copy the patched SUPP or APPL version back to
the SUPPORT.EXE or APPLICA.EXE version.
TTY TERMINAL EMULATION
The TTY terminal emulation function has been enhanced so that
pressing the <F9> function key while at the TTY emulation
screen will cause a 330 millisecond BREAK to be sent. Also,
pressing the <Esc> key is now passed on. Pressing the
<Ctrl><Alt> will pause from receiving and displaying terminal
data so that you may select any of the TTY functions. After
a function selection, receiving and displaying terminal
data will resume.
The <F4> function key on the CO/SESSION Main Menu is used only
to return to the TTY emulation screen after you have already made
a TTY emulation connection. Refer to page 37 in the User's Guide
for more information on the TTY terminal emulation.
CONFIGURATION SETTINGS
Page 94 of your User's Guide describes in detail the
available CO/SESSION configuration settings. By becoming
familiar with these options you will be able to maximize your
use and productivity with CO/SESSION.
Four new Configuration Setting options have been added:
<R> On-line HELP Handler - defaults to YES which
means CO/SESSION Help is available by pressing
<Ctrl><?> when in the menus; NO suppresses the
HELP handler and avoids the need to "take-over
the keyboard interrupt vector; this may be
useful if a conflict occurs, when in CO/SESSION
menus, with a keyboard utility;
<S> Screen-Length - defaults to 25 lines; if set to
66 lines, CO/SESSION will support the Genius
terminal from Micro Display Systems;
<T> Fast Graphics - defaults to NO which means that
all graphic screen information is transmitted to
the Support computer; when this option is set
to YES, alternating lines of graphic screen
information are skipped and not sent to the
Support computer; the Support user may
dynamically control this option by pressing
<Ctrl><Alt><T> to toggle Fast Graphics on and
off;
<U> File Access Directory Restriction - this field is
used to define the disk drives and directories
which you want to limit the access to by the remote
CO/SESSION user when that user is in the CO/SESSION
file functions. It does not attempt to restrict
access if the remote user is operating DOS on your
computer.
You define the drives and directories using standard
DOS syntax, that is, drive designator followed by
a directory; a drive designator must ALWAYS precede
the directory; for example, "C:\PUBLIC". Once you
define a drive and path, remote access may only be
made to the drives and directories, and associated
subdirectories, that you specify. Like the DOS "PATH"
command, you separate drive/directory specifications
by a semi-colon.
For example,
C:\PUBLIC;C:\UTILITIES;A:;B:;F:\PUBLIC
this specification limits access to directories
"\PUBLIC" and "\UTILITIES", and their associated
subdirectories, on the "C:" drive, all of the "A:"
and "B:" drives, and only directory "\PUBLIC" and
its subdirectories on the "F:" drive; attempted
access to any other drives or directories are not
permitted from the remote CO/SESSION File functions
menus;
<V> Video Mode Synchronize - this field is used in
conjunction with the support keyboard command
<Ctrl><LeftShift><M>; the field defines the video
mode on the APPLICATION computer which CO/SESSION
will "synchronize" on, without actually affecting
the setting of the video mode; the possible modes
are 0 through 7 and match the original IBM CGA and
Monochrome video display mode definitions.
ANSI.SYS and SIMILAR DEVICE DRIVERS
When using CO/SESSION on a system using "ansi.sys", or any
similar device driver, be sure to change the CO/SESSION
configuration settings to reflect this condition.
The configuration setting "Special Console Device Driver",
selected by pressing <Q>, should be set to YES if
"device=ansi.sys" is specified in your "config.sys" file.
REMOTE PRINTING
For remote printing to be performed, the application user's
PC must be set for remote printing and the support PC user
must activate printing or spooling on the support machine.
A support user can change the printing status on the
application PC using "sprinto". Refer to Section 7 in the
User Guide for a complete description of how to set up the
APPLICATION and SUPPORT computers for remote printing.
MAKING APPLICATION PRINT MODE PERMANENT
When setting the application PC for remote printing, you are
now prompted as to whether you want the option to be permanent.
If you respond with a 'y' for yes, then the selected application
print mode is saved on disk. The next time CO/SESSION is loaded
the application print mode is set to the saved selected option.
It remains permanent until changed. See the previous section
above on REMOTE PRINTING/SPOOLING.
UNATTENDED REMOTE ACCESS
Listed below are the recommended configuration settings on
an application machine for unattended remote access.
Configuration settings can be changed locally or remotely on
an application machine by using "sconfig".
<B> Wait Dial-In Mode YES
<D> Allow Dial-In On Confirm Timeout YES
<N> Reboot Application on Support Hangup YES
In conjunction with setting the Wait Dial-In configuration
setting to YES, you must also insure that the "DEFAULT" Call
ID record has its port parameters set to match the port,
baud rate and modem type which you are using.
CO/SESSION can be used in conjunction with a power control
device from Dynatech called Turn-On for remote, unattended
power up and power down of your computer. Dynatech may be
reached at 1-408-438-5760.
THE DEFAULT CALL ID RECORD
Created during the installation of CO/SESSION is a Call ID
record named DEFAULT. The port parameters of the DEFAULT
Call ID are used when CO/SESSION is loading with the Auto-
Answer option enabled, when using the <F1> function in the
CO/SESSION Main Menu without defining a "special" Call ID
record, and when using the <F7> function in the CO/SESSION
Main Menu for the voice first feature when switching to data.
QUICK CONNECTIONS TO A PRIMARY SITE
Establishing connections with a primary remote system can be
made quickly by using the <F1> function in the CO/SESSION Main
Menu and setting up a Call ID record as "special" in the
configuration settings. Refer to the <L> configuration setting.
This feature is especially useful for someone working at
home constantly accessing his office PC or a remote PC
station constantly calling a central support station for
assistance. For additional information see pages 35 and
98 of the CO/SESSION User Guide.