Line Compensation Settings - Lucent Technologies MERLIN LEGEND Release 6.0 System Planning Manual

MERLIN LEGEND Communications System Release 6.0
System Planning 555-660-112
3 Lines/Trunks
Selecting Line/Trunk Options
6. Under the Signaling Mode heading, for all boxes that describe T1 modules,
do one of the following:
a.
b.
7. Under the Line Compensation heading:
a.
b.
Table 3-3.
Setting
1 (factory setting)
2
3
4
5
*
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.
To retain the factory setting of robbed-bit signaling, check Robbed-
Bit Signaling (RBS).
To change the factory setting to common-channel signaling, check
Common-Channel Signaling (CCS).
Fill in the approximate distance (number of cable feet) between the
100D module and its channel service unit (CSU) or other far-end
connection in the space provided next to Cable Feet.
Use Table 3-3 to select the Line Compensation setting needed. (The
factory setting is a value of 1.)

Line Compensation Settings

dB Loss Cable Feet
-0.6
-1.2 133 266
-1.8 266 399
-2.4 399 533
-3.0 533 655
NOTE:
In Release 6.0 and later systems, assign the primary, secondary, and
tertiary clocks to any DS1 or BRI line that connects directly to the
PSTN at each system with DS1 and BRI lines. In prioritizing sources
of clock synchronization, a DS1 facility connecting to a long-distance
carrier's toll office should take precedence over a DS1 or BRI facility
connecting to a local exchange carrier's central office. In the
absence of digital PSTN facilities at a switch, either because they are
not equipped or they are not available, use a tandem PRI board for
the loop clock source. The clock synchronization can be derived from
tandeming switches if another switch in the network is connected to
*
0 133
Issue 1
February 1998
Page 3-26