3Com 980/000048/001 manual Triple Modem Module, Introduction

1 TRIPLE MODEM MODULE

Introduction

This chapter outlines the features and uses of the AccessBuilder 7000 Triple Modem Module when installed in the AccessBuilder 7000 Access Concentrator chassis.

The Triple Modem Module houses three modems on a single device module that operate independently of each other but are identical in the features and facilities they offer. Each modem is a fully featured, high speed device which provides reliable asynchronous and synchronous operation over dialled or private line networks.

The high speed transfer of up to 33.6 Kbps over dialled lines is guaranteed by using CCITT V.42bis/MNP Class 5 data compression and CCITT V.42/MNP error correction. IN addition to the fast line speeds, each modem can transfer data to the attached computer at speeds which can vary from 300 bps to 115200 bps.

The modems are compatible with a number of dialling methods and protocols, such as asynchronous AT commands and CCITT V.25bis dialling, which allow you to uses the modems in a variety of applications and environments. You can control each Triple Modem’s configuration, dialling characteristics and diagnostic features. Five factory set configurations, containing the most commonly-used Triple Modem settings, are permanently stored in each Triple Modem’s memory, providing a quick and easy method of a configuring a Triple Modem to be compatible with asynchronous and synchronous data environments over 2-wire or 4-wire Private lines or the PSTN.