Lucent Technologies 6.1 manual Planning Form Instructions

MERLIN LEGENDCommunications System Release 6.1	Issue 1
System Planning 555-661-112	August 1998
3 Lines/Trunks
Selecting Line/Trunk Options	Page 3-47

The primary, secondary and tertiary clock sources, all three of which should be programmed if possible, should be set in the following order:

1.The loop clock sources on BRI ports with DSLs in service. If at all possible, all three clock sources should be on the same 800 NI-BRI module.

2.The loop clock source on any 100D module connected to the CO and in service.

3.The loop clock source on any 100D module in T1 mode operating in a tie-trunk configuration.

4.The local clock source on any 100D module.

If no administration has been performed, upon Frigid Start (system start-up), the first 100D or NI-1 BRI port that is in service will be the default primary loop clock source.

NOTE:

Extra BRI DSLs which are not in service should never be programmed as clock sources.

Planning Form Instructions

Refer to Form 1, System Planning, Control Unit Diagram. Complete the following information on Form 3i, Incoming Trunks: BRI Options (800 NI-BRI Module), 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 (100D modules only).

NOTE:

The only option for an 800 NI-BRI module is loop, which is automatically assigned and is not programmable.

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 an 800 NI-BRI module is loop, which is automatically assigned and is not administrable.