RAS Server Resets in Answer Mode with Sportster Modem (116158)

Microsoft does not encourage nor support user changes to .INF files; therefore, Microsoft Product Support Services (PSS) does not support the procedure in this article. Although we have tested the following procedure and it appears to function as described; we strongly recommend that you make a backup copy of your .INF file before you proceed.

SYMPTOMS

When Remote Access Services (RAS) is placed in answer mode with a U.S. Robotics 14400 Internal Sportster modem, the modem may stay in a continuous loop between "Waiting for Call" and "Device Reset." This issue occurs only when the device is placed in answer mode with the RAS point-to-point server.

RESOLUTION

To correct this problem, edit the modem initialization entry (COMMAND_INIT=) in the [US Robotics Sportster 14400] or [US Robotics Courier V.32bis] section of the MODEM.INF file as follows:

Run Microsoft Windows for Workgroups Write and open the MODEM.INF file.
Choose the No Conversion button.
From the Find menu, choose Find.
In the Find What box, type [US Robotics Sportster 14400] or [US Robotics Courier V.32bis] and then choose Find Next.
Choose Cancel and then change AT&F to ATZ&F. For example, change
COMMAND_INIT=AT&F&C1&D2 V1 S0=0 S2=128 S7=55 W1 S95=44
to:
COMMAND_INIT=ATZ&F&C1&D2 X7 V1 S0=0 S2=128 S7=55 W1 S95=44
Save the MODEM.INF file.
Quit and restart RAS Phonebook.

This issues a reset command that resets the modem to the factory defaults.

The X command setting establishes compatibility with older modems that send different result codes to the receiving modem. X7 is used to enable result codes 0-11 and 13-43, which are used mainly on U.S. Robotics modems. Check the BIOS date of the modem and then check with the modem manufacturer to determine the current modem BIOS date available.