Indicators And Controls - Symmetricom SSU-2000e User Manual

Chapter 1 Product Overview
SDU-2000e Synchronization Distribution Unit
Table 1-9. ITU SSM Quality Level Definitions
Primary Reference Clock
Transit Node
Local Node
Synchronization Equipment Clock
Do Not Use for synchronization
The SSU-2000e handles SSMs in accordance with T1X1.3 TR33, T1.101-1999,
GR-253, and 379-CORE.

Indicators and Controls

All modules installed in the SSU-2000e main shelf and the SDU-2000e expansion
shelf contain status indicator lamps for displaying status. The LED indicators for
each module are described in
Input Module Reference
addition, the Communications module collects status information from all installed
modules, sets the alarm relays, and sends communications status alerting users of
any Events that exceed alarm thresholds.
The user controls these operating limits and collects measurement data through the
use of a peripheral device connected to one of three EIA-232 ports, or through the
optional Ethernet connector on the front of the unit.
SDU-2000e Synchronization Distribution Unit
The SDU-2000e Synchronization Distribution Unit
chassis that attaches to an SSU-2000e Synchronization Supply Unit and is used to
generate additional output signals. The expansion chassis uses the framing and
synchronization features of the SSU-2000e main chassis to drive an array of Output
modules. Communication with the expansion chassis is performed through one of
the three serial ports, or through the ethernet port on the main chassis front panel.
48 SSU-2000e User's Guide
Description
Chapter 6, Clock Module Reference
Data, and
Quality
Abbreviation
Level
2 PRC
4 SSUT
8 SSUL
11 SEC
15 DNU
Chapter 8, Output Module Reference
(Figure
12713140-002-2 Revision E – October 2006
Data, Chapter 7,
Data. In
1-12) is an expansion