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MERLIN LEGENDCommunications System Release 6.1
System Planning
555-661-112
Issue 1
August 1998
Lines/Trunks
Page 3-27Selecting Line/Trunk Options
3
10. Under the Source subheading in each box, do
one
of the following:
■ 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.
11. 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.
NOTE:
Normally, the primary synchronization source is set to Active
and other modules are set to Not Active.
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. To retain the factory setting, check Foreign Exchange.
b. To change the factory setting, check Special Access.
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 Service.”