Lucent Technologies MERLIN LEGEND Release 5.0 System Planning Manual page 106

MERLIN LEGEND Communications System Release 5.0
System Planning 555-650-112
3 Lines/Trunks
Selecting Line/Trunk Options
9. If assigning backup synchronization:
a.
b.
10. Under the Source subheading in each box, do one of the following:
Under the Activation subheading in each box, do one of the following:
11.
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
one of the following:
a.
b.
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 ''PRI
T1 Switched 56 – Network
Use these instructions only if channels on a 100D module are to be programmed
as T1 Switched 56 channels. The instructions provided in the
must be completed first.
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.
Service''.
Issue 1
June 1997
Page 3-24
''T1 Service'' section
3