Symmetricom 1000 User Manual

Chapter 1 Overview of the TimeProvider
Overview

 TimeProvider User’s Guide

The TimeProvider accepts the following types of input signals: 

Primary Reference Signals (PRS): 1.544 MHz, 2.048 MHz, 5 MHz, 6.312 MHz, or 
10 MHz

Span input signals: 

– E1 or 2.048 MHz analog; user-selectable CAS or CCS framing

– T1 D4, Extended Superframe (ESF)

– 1.544 and 6.312 MHz

– Composite Clock, including Japan Composite Clock (JCC) and Japan 

Composite Clock with 400 Hz (JCC4) signals

GPS input: 

– GPS signal from the stand-alone TimeProvider Interface Unit (TPIU)

– GPS signal into the TPIU integrated with the IMC (IMC/TPIU card)

The TimeProvider qualifies the input reference signals and detects the following 
errors: Loss of Signal (LOS), Alarm Indication Signal (AIS), Loss of Framing, and 
Synchronization Status Messages (SSM) where applicable. 

, on page 34, describes the inputs in more detail.

The TimeProvider produces a variety of outputs to meet different signal standards. 
Output signal types include 8 kHz, 1.544 MHz, 2.048 MHz, 6.312 MHz, E1, T1, CC, 
JCC, JCC4, and TIA/EIA-B-422 (1.544 and 2.048 MHz). The E1 and T1 signals can 
be provisioned with standard framing that meets G.703 formats. The SSM bit 
location is user-selectable on E1 outputs; CRC4 must be enabled in order to provide 
output SSMs. These outputs are available through one of several different 
connector panels. See 

, on page 39, for more information on output 

signals.