Control, Transmission, and Synchronization Interfaces
5-38 Issue 8.0 July 2002
For the nodes that distribute the timing signal, the LAA18 TG3 (DS1) circuit
pack should be used. The LAA18 TG3 (DS1) circuit pack provides a timing
signal (DS1 synchronization output) derived directly from the OC-48 high
speed line. This configuration supports either asynchronous or
synchronous low speed interfaces or any combination. The quality and
source of the timing signals must be engineered appropriately. The
guidelines for choosing the timing source(s) and the BITS clock
configurations are beyond the scope of this document.
For more information about platform timing modes, refer to "Platform
Synchronization" in this section.
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