Table of Contents
Advertisement
Chapter 9 Specifications
General Specifications
SSU-2000 Shelf Specifications
General Specifications
The operating limits for the unit are set to factory default settings as listed in
8, Default
Settings.
Table 9-1
details the general specifications for a fully populated unit configured with
SSU function. Inputs apply only to the SSU function.
Table 9-1. General Specifications
Characteristics
Architecture
Long Term Frequency
(Accuracy)
Clock Performance
Reference Signals
Sync Status Messaging (SSM)
Event Log
Configuration Data
Alarm Levels
366 SSU-2000 Technical Reference
General
Main Shelf: 2 clocks, 1 Communications module and 9 mixed
I/O modules
Expansion Shelf: 14 output modules and 2 buffer modules
Up to 4 Expansion Shelves per system
Stratum 1 PRS per (ANSI) T1.101 and ITU-T G.811
Meets requirements of the Telcordia Technologies (formerly
Bellcore) document GR-1244-CORE
Determined by the type of Input module:
GPS navigation signal
DS1 – D4 or ESF
E1 – CAS or CCS
Clock – 1 MHz, 1.544 MHz, 2048 kHz, 5 MHz, 10 MHz
Composite Clock
Japanese Composite Clock, Japanese Sine Wave
Compliant with SSM specifications per T1X1.3 TR33, (ANSI)
T1.101-1999, and Telcordia Technologies GR-253 and
378-CORE and with applicable parts of ITU-T G.781
Stores at least 500 event history including timestamp, event
type, event/alarm level, and condition causing the event; stores
the last 10 events in non-volatile memory.
Firmware stores factory configuration, customer configuration,
current configuration, and board identification information, and
provides a command which can be used to restore saved
settings.
Commands can set alarm level to IGNORE, REPORT, MINOR,
MAJOR, and CRITICAL. MINOR and MAJOR alarms can be
elevated to the next higher level after a user-defined time period.
Specification
12713020-003-2 Revision F.01 – January 2007
Chapter
Advertisement
Table of Contents
