Clock And Communications Modules - Symmetricom SSU-2000 User Manual

E1 Output Module
DS1 Output Module
Composite Clock Output Module
Japan Sine Output Module
Japan Composite Clock Output Module
DS1 Line Re-Timing Module
E1 Line Re-Timing Module
Some of the features common to all modules include:
Any module can be inserted or removed while power is applied without affecting
the operation of other modules in the system.
All modules are individually fused to protect the system in case of a short circuit
on any one module.
All modules have front panel status LEDs.
All modules are equipped with ejector tabs for ease of installation and removal
and secured in place with captured screws to provide module security and
reduce the occurrence of unauthorized removal.
All SSU-2000 modules (except the Buffer module) have an integrated CPU with
firmware and are software configurable.
Each module slot also has three pins connected together on its assigned Hybrid
DIN connector which permits the system to detect when a particular module is
removed. More information is available for each of these modules in
Input Module Reference

Clock and Communications Modules

Stratum 2E Clock Module
The Stratum 2E Clock module uses a Rubidium oscillator and meets the
requirements of ANSI and Telcordia Industries (Bellcore) for Stratum 2 clocks. This
clock also meets the ITU-T and ETSI specifications for Type II Transit Node clocks.
The module reads measurement data from the input modules, provide frequency
control of its oscillator through DDS circuitry, and generates a reference signal used
by the input and output modules. The clock module also maintains phase
synchronization with the redundant clock module. For more information, see
Stratum 2E Clock
Stratum 3E Clock Module
The Stratum 3E Clock module meets or exceeds performance requirements for
ANSI and Bellcore Stratum 3E and ITU and ETSI Type III Local Node clocks.
12713020-002-2 Revision F.01 – January 2007
Data.
Module, on page 140.
Chapter 1 Product Overview
SSU-2000 Family of Modules
Chapter 7,
SSU-2000 User's Guide 41