Control, Transmission, and Synchronization Interfaces
5-18 Issue 8.0 July 2002
In the externally timed mode, the LAA18 TG3 (DS1) circuit packs can also provide
DS1 synchronization output signals to the office BITS clock or other central office
equipment.
The DS1 reference input interface (TIMING IN PRI and TIMING IN SECY) and the
DS1 reference output interface (TIMING OUT 1 and TIMING OUT 2) are located
on the interconnection panel of the Low Speed Shelf - System Controller. Refer to
Volume I, Section 3, "Platform Descriptions," for more information about the
physical location of the DS1 reference interfaces.
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