Paradyne 3000 manual Introduction, Overview, Features

Introduction 1

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Equipment Warranty and Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Equipment Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Out of Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Enhanced Support Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Overview

AT&T Paradyne offers the COMSPHEREr 3000 Series Carrier, Figure 1-1, assembly to support high-density mounting of the following AT&T Paradyne products in a central-site environment:

•Model 3151 Channel Service Units (T1 CSUs)

•Model 3161 Data Service Units/Channel Service Units (T1 DSU/CSUs)

•Models 3511, 3551, 3611, and 3616 Data Service Units (DSUs)

•Models 3811 and 3911 dial/lease modems

Features

The carrier provides a convenient assembly in which you can install a combination of up to 16 T1 CSUs, T1 DSU/CSUs, DSUs, and/or dial/lease modems in a space-efficient package for crowded computer/ communications room environments.

In addition to the 16 devices, a single carrier operates with a power transformer unit, an optional fan module, an optional Shared Diagnostic Control Panel (SDCP), and an optional speaker panel (for use with Models 3811 and 3911 dial/lease modems only).

The number of devices that can be installed in a carrier is reduced by one for each Time Division Multiplexer (TDM) or Multichannel Multipoint (MCMP) circuit card that is installed. A TDM or MCMP card (functioning as a multiplexer or digital bridge) is physically attached to a Model 3611 DSU and occupies a separate slot in the carrier. For digital bridge applications, each DBM-V, DBM-S, or DBM-D occupies a separate slot, as well.

The ac power distribution systems for the carrier consist of a power transformer unit that contains two transformers, each serving eight slots in the carrier. The backplane distributes low-voltage ac power from the transformers to each slot, and an individual power supply on each DSU or dial/lease modem produces the regulated dc voltage.

A carrier designed to operate from a ± 48 Vdc power unit is also available. This unit, called the Central Office (CO) Power Unit, consists of a single dc power module with a fan and operates in Basic mode (the mode of operation in which the single power module supplies power to the entire carrier). An optional second power module is available for the CO Power Unit. With the optional second power module, the CO Power Unit can be configured to operate in either the Redundant mode (the mode of operation in which both power modules serve all the slots in the carrier and if one power module fails, the remaining power module assumes the entire load) or the Independent mode (the mode of operation in which each power module serves only eight consecutive slots ± Slots 1 through 8 or Slots 9 through 16 in the carrier). The Shared Diagnostic Unit (SDU), which is contained in Slot 0, is powered by both power modules. For more information, see the COMSPHERE ± 48 Vdc Central Office Power Unit Installation Guide.

3000-A2-GA31-80 December 1994 1-1