Sdu Module Features - Symmetricom SSU-2000e User Manual

Chapter 1 Product Overview
SDU-2000e Synchronization Distribution Unit

SDU Module Features

The SDU-2000e expansion chassis family of modules include the E1 Output
module, DS1 Output module, 2048 kHz Output module, Composite Clock module,
and Buffer modules. The SDU-2000e expansion chassis may have up to 12
modules installed.
One or two Buffer modules, assigned to chassis slots A15 and A16
One to ten Output modules; a mixture of Output module types, where each group
of two modules must be identical
The last two module slots in the expansion shelf, labeled A15 and A16, contain the
Buffer modules that buffer the corresponding Clock and Communications module
signals from the main shelf. The buffered signals from these modules are distributed
through the motherboard to 10 Output modules.
Other common module features 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
The SSU-2000e and the SDU-2000e share common Output modules
All modules have front panel LED status indicators
All modules are equipped with ejector tabs for ease of installation and removal
All modules are secured in place with captive screws to provide module security
and reduce the occurrence of unauthorized removal
All modules, except the Buffer module, have an integrated CPU with firmware
and are software configured through the SSU-2000e, see
Conventional SSU/TSG
Each module slot has two associated hybrid DIN connectors on the chassis
backplane. The hybrid contacts of these connectors are used for Power, Logic
Ground, and Frame Ground connections
Each module slot has three pins on each Hybrid DIN connector that allow the
system firmware to detect module removal and insertion. This provides
plug-and-play capability.
Connector Panel Features
The expansion chassis provides front-accessible connections for external power,
grounding, clock inputs, and output connections. All modules plug in from the front
of the chassis.
54 SSU-2000e User's Guide
System, on page 226, for additional information
Configuring a
12713140-002-2 Revision E – October 2006