RAS Can't Connect to Windows NT 3.1 RAS via AT&T BNS 1000

• Microsoft Remote Access client for Windows for Workgroups 3.11
• Microsoft Remote Access client for Windows NT 3.1

SUMMARY

A Remote Access Service (RAS) for Windows NT 3.1 server MODEM.INF file will need modification in order to allow RAS for Windows for Workgroups 3.11 clients or RAS for Windows NT 3.1 clients to be successfully authenticated if an AT&T BNS 1000 security switch box (or similar device) is linked in line between the RAS server's serial port and its modem.

Configuration Diagram

RAS client---modem   <---phone line---> modem---BNS1000---RAS server

NOTE: The AT&T BNS 1000 device has NOT been certified for use with RAS at the time this article was written (November 29, 1993) and Microsoft therefore does NOT support it at this time. However, the following modifications may be all that's needed to operate RAS with this device successfully.

MORE INFORMATION

If the following modifications to the RAS server's MODEM.INF file are not made, the RAS client user will initially be able to connect to the RAS server's modem, go into RAS' interactive Terminal mode and be successfully authenticated by the AT&T BNS 1000 security device, but then will be disconnected immediately after choosing Done in the Terminal mode.

In order for the RAS server to properly wait for the client signal and authenticate RAS callers, do the following:

1. Stop the RAS server.

2. Copy the [SD ACM400 w/ AT&T 3820] section in the MODEM.INF file to the of the file to create a new section.

3. Give the newly created section a new section title, for example, [AT&T BNS 1000 switch] and remove all the comment lines below the section title that start with a semicolon.

4. Remove all the following lines

          - macros(for example, "<speaker_on>=M1" and so on)
          - COMMAND_INIT
          - COMMAND_DIAL
   

   and then edit the rest of the section so it looks like this:

         ;---------------------------------------------------------
         [AT&T BNS 1000 switch]
   

         DEFAULTOFF=
         MAXCARRIERBPS=19200
         MAXCONNECTBPS=19200
   

         COMMAND_LISTEN=
         CONNECT=<match>"DIALIN_GATEWAY"
   

         ;---------------------------------------------------------------
   

5. Save and close the MODEM.INF file.

6. In the Control Panel window, choose the Network icon, and then select Remote Access Service in the Installed Network Software list. Choose Configure and reconfigure RAS to use the newly created section in the MODEM.INF file.

7. Restart RAS on the server.