363-206-285
System Introduction
Issue 3 June 2001
1-5
Introduction to the DDM-2000 OC-3
Multiplexer 1
The DDM-2000 OC-3 Multiplexer is a single shelf SONET digital multiplexer. It is
capable of multiplexing up to 84 DS1 signals, or 3 DS3 signals, or 3 EC-1 signals,
or 6 OC-1 signals, or a combination of DS1, EC-1, and DS3, and OC-1 signals,
into a SONET standard 51.84 Mb/s OC-1, 155.52 Mb/s OC-3 or 622.08 Mb/s
OC-12 signal. The OC-1, OC-3, and OC-12 lines, all transmission-affecting circuit
packs, and the −48 V DC power feeders may be optionally protected. The shelf
can be equipped to serve many diverse network applications and supports a
variety of operations interfaces for current and evolving network operations
needs.
The DDM-2000 OC-3 Multiplexer is designed for loop (access), interoffice
(transport), and customer location applications. The DDM-2000 OC-3 Multiplexer
starts with many of the proven features of Lucent's DDM-1000 multiplexer and
extends into the future with the flexibility of the SONET standard.
A single 8.5-inch high shelf supports a mix of DS1, DS3, OC-1, OC-3, OC-12,
EC-1, OC-3c (STS-3c), and IS-3 signal interfaces, satisfying a wide range of
lightwave terminal and SONET electrical multiplexer applications. It supports
point-to-point, hubbing, DS1/DS3/EC-1 add/drop, STS-1 drop applications, ring
networks and OC-1 extensions.
The DDM-2000 OC-3 Multiplexer is designed for easy installation and operation.
Centralized operation is supported by a full set of single-ended operations (SEO),
control, and maintenance features. Integrated test capabilities and default
provisioning simplifies installation. Some tasks can be performed using faceplate
LED displays and controls, while a CIT gives access to sophisticated
maintenance, provisioning, and reporting features. A PC is needed to download
software and to run CPro-2000 graphical user interface tool software.
Built-in maintenance capabilities support both installation and system operation. A
DDM-2000 OC-3 Multiplexer can be fully tested and installed without external test
equipment.
The DDM-2000 OC-3 Multiplexer has a phased release plan. This manual has
been issued to introduce Release 13.0 and will be updated to cover additional
releases as they become available.
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