AT&T MERLIN LEGEND Reference page 80

Planning
Planning Form Instructions
Refer to System Form 1, System Planning, "Control Unit Diagram. " Complete the
following information on System Form 3e, Outside Lines-BRI-Options, page 2:
1. To keep the factory setting (the first slot and port found in the system
provides synchronization for the system) or if assigning a different module to
provide primary clock synchronization:
— Enter the slot and/or DSL number (BRI only) under "Primary Clock
Synchronization. "
— Under the "Source" subheading, check "Loop" to indicate that the system
uses the clock of the far-end connection (factory setting) or "Local" to
indicate the clock is free-running (I00D modules only).
NOTE:
The only option for a 800 CO-BRI module is loop.
2. If assigning secondary or tertiary backup synchronization:
— Enter the slot and DSL number (BRI only) under "Secondary Clock
Synchronization" and/or "Tertiary Clock Synchronization. "
— Under the "Source" subheading in each column, check "Loop" to indicate
that the system uses the clock of the far-end connection (factory setting)
or "Local" to indicate the clock is free-running (100D modules only).
NOTE:
The only option for a 800 CO-BRI module is loop.
Line Options
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