Pri Options - AT&T MERLIN LEGEND Release 3.1 System Planning Manual

Selecting Line/Trunk Options
Under Priority, in the Clock Synchronization section, do one of the
following:
If installing only one 100D module:
— To keep the factory setting, check Primary (that is, this module
— If the synchronization source is other than through the 100D
If installing more than one 100D module, decide which module, if any,
provides the primary synchronization:
— If Module 1 provides clock synchronization, check Primary in the
— If Module 2 (or Module 3) provides clock synchronization, check
— If the synchronization source is other than through a 100D module,
8. If assigning backup synchronization:
a. In the box that describes the 100D module providing secondary
synchronization, check Secondary.
b. In the box that describes the 100D module providing tertiary back up,
check Tertiary.
9. Under the Source subheading in each box, do one of the following:
To retain the factory setting (that is, the system uses the clock of the
far-end connection), check Loop.
To change the setting (the clock is free-running), check Local.
10. The typical setup for the primary synchronization source is Active, and
other modules are set to Not Active. Under the Activation subheading in
each box, do one of the following:
If loop clock synchronization is taking place, check Active (factory
setting).
If the clock is free-running, check Not Active.
11. Under the Channel Service Unit heading, check Foreign Exchange.

PRI Options

After you have completed the module information on pages 1 and 2 of Form 3b,
Incoming Trunks: DS1 Connectivity (100D Module), use the instructions in this
section to record PRI options:
Assigning B-channels to groups
Associating outgoing and incoming services to the groups
3–30
Lines/Trunks
provides synchronization for the system).
module, check None.
first box (the factory setting).
Primary in the box that describes that 100D module.
check None.