Outputs; Communication; Clocks - Symmetricom TimeProvider 1000 User Manual

Chapter 1 Overview of the TimeProvider
Overview
The TimeProvider qualifies the input reference signals and detect the following
errors: Loss of Signal (LOS), Alarm Indication Signal (AIS), Loss of Framing, and
Synchronization Status Messages (SSM) where applicable. Reference Input
Signals, on page 32, describes the inputs in more detail.

Outputs

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, and JCC4. A Retiming module is also available to re-time, re-shape, and
re-amplify E1 and T1 signals. The E1 and T1 signals can be provisioned with
standard framing that meets G.703 formats. These outputs are available through
one of several different connector panels. The E1 Retiming module is available with
either BNC or Siemens 1.6/5.6 connectors, and the T1 Retiming module has
wirewrap connectors. See Output Signals, on page 36, for more information on
output signals.
The TimeProvider outputs are arranged into four groups of eight outputs per group
in the Main shelf and four groups of eight outputs per group in the optional
Expansion panel. Each group is labeled A, B, C, and D, and can be configured
independently.

Communication

Three communications ports provide access to the TimeProvider: Ethernet, local
Craft serial port, and a Remote serial port. These ports are described in detail in
Communication Ports, on page 31.

Clocks

The TimeProvider's clock design includes a highly stable ovenized Quartz crystal or
Rubidium oscillator with Direct Digital Synthesis (DDS) to produce accurate
synchronization outputs. In a dual-IOC configuration, the clock function is redundant
to provide protection. Each IOC qualifies the input signal and filters jitter and wander
noise elements that may exist. In the event that all input references are lost or
disqualified, the TimeProvider's clock design, together with the SmartClock
technology, goes into holdover mode with the oscillator providing the system
reference.
The Rubidium IOC meets Stratum 2/Type II performance; the Quartz IOC meets
Stratum 3E/Type I performance.
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