363-205-401 Conversions: DLP-508
Issue 7, March 1997 Page 3 of 4
5. When converting an FPA or FPC to FPB Mode 1 or 2, or converting an FPB
Mode 1 to FPB Mode 2, service interruption is unavoidable. Have central office
equipment perform the necessary procedures to equip the system (in-service)
before continuing. Ignore alarm indications while the central office equipment
is being prepared for conversion.
If converting to a Mode 2 system, remove
LIU B and LIU D before the ADU is installed.
6.
!
CAUTION:
Incorrectly set ADU option switches may result in immediate or future
loss of service or may introduce errors into the digital bitstream.
Insert
ADU
into
ADU
slot in bank being equipped.
Response: After approximately 20 seconds,
ADU
and
BCU FAIL
indica-
tors go off.
Comment: Other alarm indicators may take up to 4 minutes to settle. It is
normal for these alarms to go on and off during this initializa-
tion period. When converting from Mode 1 to Mode 2, or vice
versa, all alarms (such as CLF, MJ, and digroups) will not clear
until both ends have been equipped for the new configuration.
7. After approximately 20 seconds, do
ADU
and
BCU FAIL
indicators go off?
If
YES,
then
STOP. YOU HAVE COMPLETED THIS PROCEDURE.
If
NO,
then continue with Step
8.
"Incorrectly set ADU option switches may result in immediate "or future loss of
service or may introduce errors into the "digital bitstream. ".Ae ".St 1 "Reinstall
ADU
into
ADU
slot. ".St 0 "After approximately 20 seconds, do
ADU
and
"
BCU FAIL
indicators go off?
If
YES,
then
STOP. YOU HAVE COMPLETED THIS PROCEDURE.
If
NO,
then continue with Step
8.
8. Replace
BCU
.
9. After approximately 20 seconds, do
ADU
and
BCU FAIL
indicators go off?
If
YES,
then
STOP. YOU HAVE COMPLETED THIS PROCEDURE.
If
NO,
then continue with Step
10.
10. Replace
BCU
with
BCU
removed previously.
11. Remove
ADU
and check settings of switches on option switch
S1
per work
order and Step
3
.
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