Lucent Technologies FiberReach DDM-2000 - Page 1421

363-206-305 Trouble Clearing:
TAP-107
Issue 3, June 2000 Page 15 of 22
DDM-2000 F
IBER
R
EACH
W
IDEBAND
S
HELF
inc. OC12 sig degrade (BER) CR or MN The bit error ratio (BER) in the specified OC-12
line exceeds the provisioned soft error threshold
(10
–9
to 10
–5
) but below the hard error threshold of
10
–3
.
Likely cause:
Failure of the
OLIU
circuit pack at
the near end, failure of the
OLIU
circuit pack at the
far end, failure of the receive fiber, or incorrect
setting of the optical power switch on the
OLIU
circuit pack.
inc. OC12 sig failed (BER) CR or MN The bit error ratio (BER) in the specified OC-12
signal exceeds 10
–3
.
Likely cause:
Failure of the
OLIU
circuit pack at
the near end, failure of the
OLIU
circuit pack at the
far end, or failure of the receive fiber.
inc. STS1 AIS CR, MJ,
MN, or
None
The system has detected an incoming STS-1 alarm
indication signal (AIS) in the active OC-1, OC-3, or
OC-12 line. The system responds by transmitting
DS1 or DS3 AIS toward the DSX and transmitting
STS-1 yellow toward the fiber from which the AIS is
being received.
Likely cause:
Incomplete or incorrect
cross-connect provisioning in an end-to-end
network. Unprotected removal or failure of a
DS3
,
MXRVO
, or
OLIU
circuit pack at the far end, or
unprotected optical line failure.
inc. STS1 LOP OC1
slotaid
CR or MN The system has detected a loss-of-pointer (LOP)
condition. A valid STS-1 pointer could not be found
for eight consecutive frames in the identified STS-1
signal.
Likely cause:
If this condition occurs on the
STS-1 on both OC-1 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 line, the likely cause is failure of
the
OLIU
circuit pack at the near end or far end.
inc. STS1 LOP OC3
slotaid
CR or MN The system has detected a loss-of-pointer (LOP)
condition. A valid STS-1 pointer could not be found
for eight consecutive frames in the identified STS-1
signal.
Likely cause:
If this condition occurs on the STS-1
on both OC-3 lines, the likely cause is an
unprotected failure of an
MXRVO
or a
DS3
circuit
pack at the far end. If this condition occurs on only
one OC-3 line, the likely cause is failure of the
OLIU
circuit pack at the near end or far end.
Table B – RTRV-ALM Message Descriptions (Continued)
Description
Alarm
Level Meaning