Contents

Chapter 1 - Introduction and Description

Introduction .......................................................................................................................................................6
Features............................................................................................................................................................ 6
Technical Specifications.................................................................................................................................... 7
Preview of this Guide ........................................................................................................................................7
Related Documentation..................................................................................................................................... 8
Front Panel........................................................................................................................................................ 9
Modem Ports (Ports 1, 2, 3, and 4)............................................................................................................. 9
Hub .............................................................................................................................................................9
System........................................................................................................................................................ 9
Back Panel...................................................................................................................................................... 10

Chapter 2 - Installation

Unpacking ....................................................................................................................................................... 12
Safety Warning Telecom................................................................................................................................. 12
Cabling your MT4X56USB ..............................................................................................................................13

Chapter 3 - Software Loading and Configuration

Introduction .....................................................................................................................................................16
System USB Support ......................................................................................................................................16
Loading your Driver Software.......................................................................................................................... 16
MT4X56USB Drivers for Windows 98....................................................................................................... 16
MT4X56USB Drivers for Windows 95....................................................................................................... 19
MT4X56USB Drivers for Windows NT 4.0................................................................................................ 21
MT4X56USB Drivers for Windows 2000................................................................................................... 23
Installing Your V.90 Modems........................................................................................................................... 27
Installing Your V.90 Modems (Windows 2000)................................................................................................ 31
Windows 95/98 Configuration Utility................................................................................................................ 34
Windows NT 4.0/2000 Configuration Utility..................................................................................................... 36

Chapter 4 - AT Commands, S-Registers and Result Codes

Introduction .....................................................................................................................................................40
S-Registers .....................................................................................................................................................49
Result Codes................................................................................................................................................... 51

Chapter 5 - Remote Configuration

Introduction .....................................................................................................................................................54
Remote Configuration Procedure.................................................................................................................... 54
Setup ........................................................................................................................................................54

Chapter 6 - Troubleshooting

Introduction .....................................................................................................................................................58
None of the Indicators Light...................................................................................................................... 58
The Modem Does Not Respond to Commands ........................................................................................58
The Modem Dials But Cannot Connect ....................................................................................................58
The Modem Disconnects While Online..................................................................................................... 59
The Modem Cannot Connect When Answering........................................................................................ 60
The Modem Doesn’t Work with Caller ID.................................................................................................. 60
Fax and Data Software Can’t Run at the Same Time............................................................................... 60