Lucent Technologies FiberReach DDM-2000 - Page 1377

363-206-305 Trouble Clearing:
TAP-101
Issue 3, June 2000 Page 3 of 6
DDM-2000 F
IBER
R
EACH
W
IDEBAND
S
HELF
Table A – Critical (CR) Alarm Conditions
Alarm Level or
LED Indication Trouble Description (Note) Likely Causes Step or Procedure
CRITICAL.
CR
LED lighted.
FAULT
LED
flashing on
DS3
CP.
inc. (from DSX) DS3 LOS*
inc. (from DSX) DS3 OOF*
inc. (from DSX) DS3 sig
failed*
inc. (from DSX) DS3 AIS*
Equipment failed or removed at
DSX-3; DS3 input disconnected
at DSX-3 or at DDM-2000
backplane; an out-of-frame DS3
signal incoming to the DSX-3 at
far end; unprotected failure of
DS3
CP at far end or near end;
DS3 signal looped at both ends.
Step 12
CRITICAL.
CR
LED lighted.
FAULT
LED
flashing on
OLIU
(s).
inc. OC1 LOS
inc. OC1 LOF
inc. OC1 sig failed (BER)
inc. OC1 sig degrade (BER)
inc. OC3 LOS
inc. OC3 LOF
inc. OC3 sig failed (BER)
inc. OC3 sig degrade (BER)
inc. OC12 LOS
inc. OC12 LOF
inc. OC12 sig failed (BER)
inc. OC12 sig degrade (BER)
Failure of
OLIU
circuit pack at
near or far end, or failure of
receive fiber.
TAP-111
inc. STS1 LOP OC1
slotaid
inc. STS1 LOP OC3
slotaid
inc. STS1 LOP OC12
slotaid
If this condition occurs on the
STS-1 on both OC-1, OC-3, or
OC-12 lines, the likely cause is
an unprotected failure of an
MXRVO
or an
OLIU
circuit pack
at the far end. If this condition
occurs on only one OC-1, OC-3,
or OC-12 line, the likely cause is
failure of the
OLIU
circuit pack at
near or far end.
TAP-111
CRITICAL.
CR
LED lighted.
inc. OC1 line AIS
inc. OC3 line AIS*
inc. OC12 line AIS*
Failure of
OLIU
circuit pack at
the far end.
Step 10
inc. STS1 AIS
*
Incomplete or incorrect
cross-connect provisioning in
end-to-end network. In ring
applications, unprotected
removal or failure of
OLIU
circuit
pack at far end or fiber failure.
TAP-118
inc. STS1 unequipped STS-1 cross-connects have
been deleted in upstream
equipment interfacing with the
DDM-2000 OC-1, OC-3, or
OC-12 ring.
Find the deleted
cross-connects in
the upstream
equipment.