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Chapter 1:
Overview
Advances in technology and decentralized data processing have allowed companies to improve
business efficiency and performance by automating key functions and introducing new electronic
applications at the branch level. As a result, branch offices need to access the backbone
communications network in order to electronically exchange information. Today's networks need
to integrate the communications requirements of every business location and to support high speed
connectivity (often with 56/64 kbps or more bandwidth) between the branch office and the
backbone network.
General DataComm's OCM (Office Communications Manager) is a powerful, cost-effective
networking platform that extends the backbone network's capabilities to remote branch office
locations. Supporting voice, fax, data, video, image and LAN (Local Area Network) applications,
the OCM can easily be tailored to any organization's network requirements.
The OCM offers connectivity to a variety of digital carrier services, allowing you to select the one
providing the best performance/cost ratio in each location. These service options include: 56/64K
leased line services, fractional T1/E1 services (groomed Nx56/64K services), and T1/E1 services.
The OCM is ideal for branch office locations. Its modular architecture makes it easy to install and
maintain. To guarantee reliable performance, the OCM offers optional, fully redundant power
supplies, common logic and line interface modules (LIMs).
OCM-2000 Overview
At backbone network locations, the OCM-2000 connects to GDC's Transport Management System
(TMS) product family. The OCM-2000 is fully channel compatible with the TMS, and all OCM
management functions, including configuration, monitoring, diagnostics, fault management, and
network restoral, are performed from the central TMS controller (s). The TMS architecture allows
the connection of up to 248 OCMs to each TMS device and up to 10,000 OCM-2000 devices in a
network.
OCM-1000 Overview
The OCM-1000 is a networking multiplexer. It supports fax, data, video, image and LAN (Local
Area Network) applications. The OCM-1000 offers connectivity to a variety of carrier services,
allowing you to select the best configuration for your network. These service options include 9.6 to
28.8 kbps analog services, 56/64 kbps leased line services, fractional T1/E1 services (groomed
Nx56/64 kbps services), and T1/E1 services. The OCM-1000 can be upgraded to an OCM-2000 by
simply swapping a common logic module.
036R340-000
Issue 16
System Description
Office Connunications Manager OCM-1000/OCM-2000
Installation & Operation
1-1
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