Hardware Configuration Guide
Configuring a Subtending SSU
226
SSU-2000 User’s Guide
12713020-002-2 Revision D – April 2004
Figure 9-3.
SSU-2000 Configured as Monitor-Only System
A monitor only configuration consists of the following:
SSU-2000 main chassis with SDU Termination Plug
Communications Module
One or more Input Modules (one-port or three port DS1 or E1)
Stratum 2E Clock Module
Stratum 3E Clock Module
One (or more) input adapter panel(s) and I/O cable; one three port input adapter
required for each three-port input module in the system; one four-port input
adapter required for each set of four One-Port Input Modules
Configuring a Subtending SSU
The SSU-2000 configured as a Subtending Synchronization Supply Unit (SSU)
provides remote phase synchronization and holdover capabilities to telecom
network elements, such as digital switches, Digital Access Crossover Systems
(DACS), and channel banks for customers with very large equipment offices. For
further information on Subtending SSUs, refer to Section 7 of Telcordia Specification
GR-378-CORE.
The Subtending SSU configuration is designed in accordance with the Building
Integrated Timing Supply (BITS) concept for intraoffice synchronization distribution.
The BITS concept provides a synchronization hierarchy that is traceable back to
one master clock (SSU), or redundant master clock pairs, referred to as the BITS.
The BITS provides DS1 and Composite Clock (CC) timing to all synchronized
clocks in the office, which provides timing inputs for all remote (subtending) SSUs.
Summary of Contents for SDU-2000
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