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Chapter 1 Product Overview
SDU-2000 Synchronization Distribution Unit
Indicators and Controls
All modules installed in the SSU-2000 main shelf and the SDU-2000 expansion
shelf contain status indicator lamps for displaying status. The LED indicators for
each module are described in
Reference
Data,
Module Reference
information from all installed modules, sets the alarm relays, and sends
communications status alerting users of any Events that exceed alarm thresholds.
SDU-2000 Synchronization Distribution Unit
Up to four SDU-2000 Synchronization Distribution Units (expansion shelves) can be
attached to the SSU-2000 for output expansion
expansion shelf contains two Buffer modules and 14 output modules (can be a
combination of output modules). Four expansion shelves can hold up to 56 Output
modules capable of generating an additional 1120 synchronized clock outputs for
system distribution. Each expansion shelf is connected to the main shelf with
redundant clock cables to protect against cable faults.
Figure 1-12. Front View of the SDU-2000 Expansion Shelf
The SDU-2000 Expansion shelf is designed to be compatible with international
environmental, safety and electromagnetic compliance (EMC) standards for
–48/60 VDC powered telecommunication transmission equipment installed in
telecommunication centers with inside telecom signal connections. The farthest
Expansion shelf may be located up to 200 feet (61 meters) from the SSU-2000 main
shelf.
52
SSU-2000 User's Guide
Chapter 6, Clock and Communications Module
Chapter 7, Input Module Reference
Data. In addition, the Communications module collects status
Data, and
Chapter 8, Output
(Figure 1-12
and
Figure
12713020-002-2 Revision F.01 – January 2007
1-13). Each
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Troubleshooting
