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System Description
OCM System Description
The OCM system is a platform that combines internetworking and multiplexer functions. A basic
OCM would consist of the shelf (MS), one or more power supplies, a single Common Control
Module (CCM), a single Line Interface Module (LIM), and multiple Data Channel Modules
(DCM). An expansion shelf may be added to provide additional slots.
The modules used in the OCM are interchangeable (with certain limitations). Each module is fully
described in its own chapter. This document describes the OCM-1000 and OCM-2000 systems.
There are many features in common; difference between the systems are noted.
Common Features
The following set of features are common to both the OCM-1000 and OCM-2000 systems:
•
OCM system combines voice, data and LAN traffic.
•
Housed in a 16-slot 19" shelf that may be mounted in a 19" open rack or standard cabinet. Shelf
may be expanded to 32 slots by adding a second shelf.
•
Line interface, data, voice and power supply modules plug in from the front of the shelf. No
connectors have to be removed, as all connections are made from the rear of the shelf.
•
Line interfaces are T1/DSX-1 and T1 CSU, E1, V.11, V.35. All LIMs can be configured to be
redundant. Available aggregate rates range from 56k to 2.048 Mbps.
•
Supports two aggregates through one or two Line Interface Modules (LIMs).
•
Data channel interfaces are EIA/TIA-232-E, V.35, EIA-422, and EIA-423. Supports, through
network management, operation of V.54 controls to control Remote Loopback and Local
Loopback of connected modems, and to acknowledge Test Mode Indication on a modem tail
circuit.
•
Voice channel interfaces are 2W FXO and FXS, and 2W or 4W E&M.
•
Programmable RTS (Request-to-Send) to CTS (Clear-to-Send) delays at local OCM channels.
•
Safety Compliance - OCM in a domestic shelf is recognized to UL 1459 and certified to CSA
C 22.2 # 225 (Telco Equipment Safety). OCM in an international version shelf meets EN60950
(Safety of Information Technology Equipment) and EN41003 (Safety of Equipment for
Connection to the Telecom Network).
•
EMC (Electromagnetic Compatibility) Compliance - OCM in a domestic shelf meets FCC Part
15 class A. An OCM in an international shelf meets EN55022 class A.
•
Telecom Approval - Refer to the Technical Characteristics table in each module chapter.
•
All plug in circuit card assemblies are hot swappable. Cards may be installed or removed
without limitation with power applied.
•
The power supply modules are hot swappable, however the power ON / OFF switch located on
the front panel of the module should be in the OFF position before installation or removal. This
assures against interference with the active supply.
•
Dual Data Channel cards support Async, Sync & Isoc data rates from 1200 to 38.4Kbps (300,
600, 1200, 1600, 1800, 2000, 2400, 3200, 3600, 4000, 4800, 6400, 7200, 8000, 9600, 12,000,
14000, 14400, 16000, 19200, 24000, 28000, 28800, 32000, 36000 and 38400 bps).
1-2
Office Connunications Manager OCM-1000/OCM-2000
Installation & Operation
Overview
036R340-000
Issue 16
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