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MERLIN LEGENDCommunications System Release 6.1
System Planning
555-661-112
Issue 1
August 1998
Lines/Trunks
Page 3-26Selecting Line/Trunk Options
3
Table 3–3. Line Compensation Settings
* Based on 22-gauge cable.
8. If the system includes both 800 NI-BRI and 100D modules, clock synchro-
nization planning should be completed at the same time. There is only one
primary/secondary/tertiary clock for both 800 NI-BRI modules and 100D
modules, with the same system programming screens used for both types.
Plan your clock source administration to minimize the need for clock
switching, which is known to cause noise on active calls.
NOTE:
The following information is for planning clock synchronization in
systems that are not part of a private network. For planning clock
synchronization in a private network configuration, see the
Network
Reference
.
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 provides synchronization for the system).
— If the synchronization source is other than through the 100D
module, check None.
■ 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 first box (the factory setting).
— If Module 2 (or Module 3) provides clock synchronization,
check Primary in the box that describes that 100D module.
— If the synchronization source is other than through a 100D
module, check None.
9. 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.
Setting dB Loss Cable Feet*
1 (factory setting) -0.6 0−133
2 -1.2 133−266
3 -1.8 266−399
4 -2.4 399−533
5 -3.0 533−655