Introduction; Overview - Paradyne COMSPHERE 3920PLUS Technical Reference Manual

Overview

The COMSPHERE 392xPlus modems are full-feature, high-speed leased modems, providing
reliable asynchronous and synchronous operation over leased- or dial-line networks with data rates
as high as 33,600 bps.
Through downloading capability, any 392xPlus modem is upgradable to the latest firmware,
requiring no new hardware investment or on-site personnel, with little or no downtime (refer to
Chapter 3,
modems support a wide range of modulation schemes and offer control using either AT commands,
the diagnostic control panel (DCP), or the optional COMSPHERE 6700 and 6800 Series Network
Management Systems (NMS). The NMS performs extensive monitoring, testing, reporting, and
restoral functions to assist in managing your network.
The 392xPlus modems are compatible with a number of dialing methods and protocols, such as
asynchronous AT commands, ITU-T V.25bis dialing, and the DCP. The DCP allows you to use the
392xPlus modem in a variety of applications and environments while also providing control over
modem configuration, dialing, and diagnostics. The 392xPlus modems come with preset factory
configurations that are the most often used modem settings.
3920-A2-GH30-40
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 392xPlus Models
Model 3920Plus Standalone Singleport Modems
Model 3920Plus Standalone Multiport Modem
Model 3921Plus Singleport Carrier-Mounted Modem
Model 3921Plus Multiport Carrier-Mounted Modem
392xPlus Operational Modes
392xPlus Modem Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
392xPlus Singleport Modem Features
392xPlus Multiport Modem Features
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Multipoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dual-Leased Backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MSD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital Bridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V.34 Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Multiport Backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Synchronous Data Compression
Government Requirements and Equipment Return
United States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Canada . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DCP Operation, for more information regarding downloading options). The 392xPlus
October 1998

Introduction

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