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Trunks
Line Compensation
Factory setting.
Line compensation adjusts for the amount of cable loss in decibels (dBs). It is
based on the length of cable between the 100D module and the CSU or
between the module and another far-end connection—for example, a line
repeater.
The factory setting is a value of 1, which allows a maximum loss of 0.6 dB. The
other possible settings are shown in Table 3-4 (based on 22-gauge cable).
Table 3-4 Line Compensation Settings
Setting
1
2
3
4
5
Planning Form Instructions - Continued
On Form 3c, for each module in the system:
5 .
Under the "Frame Format" heading:
Check "D4" to retain the factory setting.
Check "ESF" to chege the factory setting (required for ISDN-PRI and
international data transmission).
6 .
Under the "Suppression" heading:
Check "AMI-ZCS" to retain the factory setting.
Check "B8ZS" to change the factory setting (required for ISDN-PRI).
Under the "Line Compensation" heading:
7 .
Fill in the approximate distance (number of cable feet) between the 100D
module and its CSU or other far-end connection next to "Cable Feet."
8.
Use Table 3-4 to select the line compensation setting needed.
Check "1" (.6 dB) to retain the factory setting.
Check the setting (2-5) required because of the distance between the
module and tyhe CSU or other far-end connection.
dB LOSS
-0.6
-1.2
-1.8
-2.4
-3.0
Trunk Options 3-21
Cable Feet
0 - 1 3 3
133 – 266
266-399
399-533
533-655
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