349
GCD-2BRIA
-OR-
GCD-PRTA
Related Features
ISDN Compatibility
K-CCIS – T1
T1 Trunking (with ANI/DNIS Compatibility)
Feature Examples
Digital Trunk Clocking Examples:
If multiple PRIs exist, the first one that synchronized with the carrier is chosen. In this example, the PRI
in 02 was the first to synchronize with the carrier; therefore, it is the PLO synchronization source.
Digital Trunk Clocking Example 1
If there are multiple PRIs and the one being used for the source goes down, the system begins to count
forward in slot numbers looking for the next available PRI. In this example, the PRI in 02 went down, so
the system now begins looking forward in slot numbers for the next PRI to use as the clock source.
Digital Trunk Clocking Example 2
In this example, the PRI in 05 was the first to synchronize with the carrier and became the PLO
synchronization source. The PRI in 05 then went down and the system began looking forward in slot
numbers to find the next PLO source. In this case, the PRI in 02 was the next source because after it
looks through the rest of the slots in the system, it starts over with 01.
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