1. imgr222.zip Driver
2. README.TXT File Contents

README.TXT Driver File Contents (imgr222.zip)

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Courier I-modem - Version 2.1.10
README FILE
Copyright 1997 3Com/U.S. Robotics
========================================================
========================================================
1. Additional Features and Improvements
========================================================
   
   - x2 technology in server and symmetric modes
   - Turbo-PPP including Host Mode for up to 128kbps data transfer over ISDN
   - Extended V.110 connectivity up to 38,400bps
   - XMODEM software downloads
   - Extended Party Number Identification (Caller ID)
   - Improved Configuration Manager
   - Extended Configuration Manager DN Setup
   - Improved Configuration Manager online help
   - 32-bit CAPI 2.0 DLL
   - Dynamic Bandwidth Allocation

     See the Courier I-modem documentation for more information
     about these features and how to implement them.

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2. Upgrading with PCSDL
========================================================
     
     3Com recommends that you use PCSDL to upgrade your
     I-modem. 

 i)  Reboot your PC to DOS mode before using PCSDL.

ii)  Before proceeding, note current DIP switch settings
      Set DIP switch 1 to the OFF position to restore FACTORY defaults, if necessary.

iii) Toggle the power on the I-modem to load these settings

   - Using PCSDL

iv) Go to the DOS prompt.

v)   Change to the directory that you placed the PCSDL file.

vi)  Run PCSDL by typing PCSDL <Enter> in conjunction with the following switches.

	For the external Courier I-modem:
       	PCSDL -p1 -r115200 -vNA2.1.10 -vSD2.1.10 -nSDie -nNAie

       	For the internal Courier I-modem:
       	PCSDL -p1 -r115200 -vNA2.1.10 -vSD2.1.10 -nSDim -nNAim -b

      PCSDL.EXE checks its code. If an error message appears, the operation is 
      terminated; download the file again.
       -------------------------
       REQUIRED SWITCHES:
       -------------------------
       -p  COM Port: 1, 2, 3 or 4

       -r  Baud Rate: 2400, 9600, 19200, 38400, 57600 or 115200 

       -v  <NA/NI>n.n.n NAC/NIC Operation Code Version: n=0-99

       -n  SD?? Filename Prefix: ?=ASCII
 
       -n  <NA/NI>?? Operation Code Filename Prefix: ?=ASCII

       -v  SDn.n.n Software Download Version: n=0-99

       -------------------------
       OPTIONAL SWITCHES:
       -------------------------
       -I  IRQ 3(default COM2/4), 4(default COM1/3), 5, or 7

       -d  Directory Path Name: default = current directory
   
       -b  Disable UART's FIFOs (necessary for downloading to internal models)

vi)   A prompt asks if you want to "Download Using These Settings? (Y/N)."
       Enter "Y" to continue or "N" to abort. Once you have accepted
       the settings, the software download begins. If the MS-DOS 
       prompt displays "Modem reports download successful" and
       the MR (Modem Ready) LED lights up, you have successfully upgraded your 
       Courier I-modem with the new firmware.

vii)  Switch the Courier I-modem OFF

viii) Set the DIP switches to their previous settings, if necessary.

ix)   Switch the Courier I-modem ON

x)    Send the following commands to Courier I-modem:  

       AT&F&C1&D2E1V1Q0<CR>
       ATS0=1S14=1S67=14S68=0S69=0S79=4*V2=0<CR>
       AT*W=4<CR> (for 1TR6 switches use *W=5, for VNx switches use *W=6)
       AT*P1=<CR>  
       AT*P2=<CR>
       AT*P=0<CR>
       AT*P=1<CR>
       AT*C4<CR>
       AT*R4<CR>
       AT&W<CR>
       ATZ!<CR>

  **NOTE: If the local ECHO command is disabled, you will not be able to 
	see what you are typing. Use ATE1 to enable local echo.

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3. Important points to remember
========================================================
     
     - Since MLPPP does not support encrypted passwords, you will need
       to use clear-text passwords.

     - Disable FIFOs for internal I-modems over Windows NT.

     - I-modem does not support pulse dialling over the ADP. 
       S80.1=1 allows the I-modem to send it's CALLING PARTY
       NUMBER to the remote user.  

  **NOTE:  This will prevent some UK switches from sending the 
           I-modem a dial tone.  This is noticeable on the ADP 
           and can be disabled with S80.1=0

     - CR115UK.INF supports DTE rates up to 115.2 kbps. 
       This file will work with high speed serial cards, 
       at speeds up to 115.2 kbps. 

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4. Known problems
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  **NOTE:  Check 3Com/ U.S. Robotics brand web site for updated code, 
	on http:\\www.usr.co.uk

     - The I-modem may reset if a ADP call is made
       while a data call is in progress.

     - The internal I-modem may not support parity properly.