Typical System Configurations - Symmetricom SSU-2000e User Manual

The SSU-2000e Synchronization Supply Unit (SSU-2000e) is a high-performance
Synchronization Status Messaging (SSM)-compliant Timing Signal Generator
(TSG) or Synchronization Supply Unit (SSU) that provides network synchronization
signals for the telephone and telecommunications industry. The SSU-2000e
features an integral front-access input/output (I/O) adapter panel for ease of access,
connections, and maintenance.
The SSU-2000e conforms to specifications for International, European and North
American applications as a Primary Reference Source (PRS), Synchronization
Supply Unit, and Timing Signal Generator. The SSU-2000e allows for the
integration of a variety of synchronization reference schemes including GPS and
land line DS1/E1. As a slave clock, the SSU-2000e meets or exceeds performance
requirements outlined in Telcordia Technologies (formerly Bellcore) ITU-T G.812
Stratum 2 and ETSI Type II Transit Node clocks.
The SSU-2000e is designed to comply with the application flexibility and
redundancy concepts introduced in Telcordia Technologies GR-2830. A selection of
hot-swappable modules and powerful software allow users to easily reconfigure,
upgrade, or expand the SSU-2000e to meet a variety of telecommunications
synchronization application requirements. The SSU-2000e fully supports
Synchronization Status Messaging as defined by ITU, ETSI, and ANSI requirements
in accordance with Telcordia Technologies.
The SSU-2000e is fully user-configurable and managable through the use of a
software interface. Modules can be inserted into or removed from the SSU-2000e
while the system is operational without any degradation of output signals. Each
module supports the local and remote management of critical, major and minor
alarms. Output modules and clock modules can be configured in redundant pairs,
further increasing system availability.
The SSU-2000e has extensive event detection, reporting, alarming, and storage
capabilities that permit monitoring of the system from external sites. Events are
defined as changes in conditions within the unit, or at the interfaces of the unit,
which may indicate abnormal operation or a change in the unit's operational status.
For example, an event may be a parameter which exceeds a settable threshold.
Most events can be assigned by the user to one of the following modes: IGNORE,
REPORT, MINOR, MAJOR, or CRITICAL.

Typical System Configurations

The modular design of the SSU-2000e permits a great deal of flexibility in
configuring the system components for a variety of applications. Three of the more
common configurations include:
Time Signal Generator (TSG) configuration
Primary Reference Source (PRS) configuration
Monitor-only configuration
12713140-002-2 Revision E – October 2006
Chapter 1 Product Overview
Typical System Configurations
SSU-2000e User's Guide 21