KB104287 - Modem Support in Windows NT and RAS 1.1a Client

SUMMARY

Several modems supported by Windows NT are not supported by Remote Access Service (RAS) Client version 1.1a. Some modems supported by RAS 1.1a are not supported by Windows NT.

The following modems are supported by Windows NT, but not by RAS 1.1a:

Cardinal 9600
Codex 3320
DataRace RediModem V.32bis
Datatrek 2424AMH
Datatrek Elite 624D
DSI 9624LE Plus
DSI 9624E
Macronix Maxlite Fax 9696
MicroGate MG96
MicroGate MG 144
MultiTech MultiModem 224
MultiTech MultiModem MT 932
PDI-1000
Telebit WorldBlazer-Rackmount
UDS Motorola FasTalk V.32/42b
Ven-Tel 9600 Plus II
Ven-Tel Pocket 24 V.42bis FAX
Ven-Tel 14400 Fax
Ven-Tel 14400 Internal
Zoom FX 9624V
Zoom VFX V.32bis
ZyXel U-1496

The following modems are supported by RAS 1.1a, but not by Windows NT:

Hayes 1200
Penril Alliance V.32
Telebit QBlazer
USRobotics 1200
USRobotics 2400
Western Datacom Worldcom

The Remote Access Service User's Guide, Chapter 4, does contain instructions for using unsupported modems, as well as instructions for the MODEMS.INF file to add additional modems.