DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Commands
8-53change fiber-link
8
The line equalization setting defaults to the median value of 3. This setting
remains in effect until changed by administration. Inc orrect equalizer setting s
may cause a higher error rate on the DS1 facility.
The following display shows a typical result when change fiber-link 1 is entered
on a system with simplex PNC and Center Stage Switch.
DS1C-1 Line
Compensation This specifies the type of line c ompensation or line equalization for
each facility of the DS1 CONV connected to ENDPOINT-1. Valid
entries are 1 to 5. Meanings of these entries are shown in Ta ble 8-6.
Table 8-6. DS1 Line Equalization Settings
Equalizer Setting
Distance to DSX-1 Interface (feet)
22 AWG ABAM and 24 AWG PDS 26 AWG PDS
1 1 to 133 0 to 90
2 133 to 266 90 to 180
3 266 to 399 180 to 270
4 399 to 533 270 to 360
5 533 to 655 360 to 450
DS1
CONV-2 Line
Compensation:
Same as the above for ENDPOINT-2 of the DS1 CONV Complex.
Zero Code
Suppression: Specifies the line coding format for each facili ty. Valid entries are:
zcs and b8zs. There are 2 line coding op tions supported by the
DS1 Interfaces to meet ones-density requirem ents in the data
stream. Zero Code Suppression (ZCS) line cod ing is the default
and is in place following an initialization until chang ed by
administration. Note that either line cod ing option may b e used on
the DS1 Interface that carries the pack et time slots.
Framing Mode: Specifies the data framing format ( esf or d4) used on the facility. It
is initialized to ESF. In this mode, an automatic selection p rocess is
executed until either the DS1 Interface is b rought into frame, or an
Options CCMS message is received by the framing options
master. Once options are set b y administration, they remain fixed
on the framing option master until the b oard is again initialized ,
reset, or sent new options. The framing option o n the framing
option slave Converter Board c an change to track the fr aming
option master’s option.