TAP-101
: Trouble Clearing 363-206-305
Page 8 of 10 Issue 3, June 2000
DDM-2000 F
IBER
R
EACH
N
ARROWBAND
S
HELF
13. Examine the
DSXBIU
alarms, and perform the item below for the lit indicators:
FAIL
Replace
DSXBIU
.
NE
and
FAIL
There is a failure somewhere in the T1 facility.
NE and no other alarms on any circuit pack
An
NE
and no other NBS alarms can be caused by any combination of the
following events:
• Miscellaneous alarm closure. Clear trouble that caused alarm.
•
RGU
circuit pack failure.
• May be caused by failure of a channel unit. A channel unit failure will not
cause alarms at the COT and is typically found from a customer trouble
report. Remove channel units one at a time to find bad channel unit.
!
WARNING:
Removing a channel unit will interrupt service if the channel is busy.
CLF
• If the
FE
indicator is also on, the fiber or T1 facility and transmission from
the RT to the NBS are OK, and the trouble is in the transmit section from
the NBS or the receive section at the RT.
• To clear the
CLF
with or without
FE
alarm, perform the following list in the
order given. If a replacement circuit pack does not clear the trouble,
reinsert the original pack and continue with the next item:
1. Clear any alarms on Wide Band Shelf.
2. Replace the
DSXBIU
(see second
Note
in the General section of
this TAP).
3. Replace the DT Server (see second
Note
in the General section of
this TAP).
4. If the
CLF
alarm does not clear, use local procedures to repair fiber
or T1 facility and/or wiring troubles.
To Next Page
Loading...