Lucent Technologies MERLIN LEGEND Release 7.0 System Planning Manual page 150

MERLIN LEGEND Communications System Release 7.0
System Planning 555-670-112
3 Lines/Trunks
Selecting Line/Trunk Options
9. If assigning backup synchronization:
a.
b.
10. Under the Source subheading in each box, do either of the following:
11. Under the Activation subheading in each box, do either of the following:
12. If incoming ground-start or loop-start trunks are to be emulated, then
record the CSU setting under the Channel Service Unit heading by doing
either of the following:
To set up T1 channels for T1 Switched 56 service, continue with the next section.
To set up T1 Switched 56 service on T1-Tie trunks, proceed to the section entitled
''Tie Trunks." To set up a 100D module for PRI service, proceed to the section
entitled, ''Planning Form
— If the synchronization source is other than through a 100D
module, check None.
In the box that describes the 100D module providing secondary
synchronization, check Secondary.
In the box that describes the 100D module providing tertiary back
up, check Tertiary.
To retain the factory setting, check Loop (that is, the system uses
the clock of the far-end connection).
To change the setting, check Local (that is, the clock is free-
running).
NOTE:
The MERLIN LEGEND System must be set to Loop if the
clock Source is coming from the network. The Local setting
is generated from the MERLIN LEGEND System and must
be used whenever connecting two MERLIN LEGEND
Systems or a MERLIN LEGEND System and a DEFINITY
System (Tie trunk). In a Tie trunk configuration, one system
must have the clock Source set to Local and the other must
be set to Loop.
If loop clock synchronization is taking place, check Active (factory
setting).
If the clock is free-running, check Not Active.
NOTE:
Normally, the primary synchronization source is set to Active
and other modules are set to Not Active.
To retain the factory setting, check Foreign Exchange.
To change the factory setting, check Special Access.
Instructions."
Issue 1
April 1999
3-28