Lucent DDM-2000 OC-3 User And Service Manual page 665

TAP-107
: Trouble Clearing
Page 21 of 28
Table B – RTRV-ALM Message Descriptions (Continued)
Description
inc. STS1 LOP EC1
inc. STS1 LOP OC1 slotaid
inc. STS1 LOP OC3 slotaid
inc. STS1 LOP OC12 slotaid
inc. STS1 sig degrade (BER)
Alarm
Level
CR, MJ,
MN, or
None
CR or MN The system has detected a loss-of-pointer (LOP)
CR or MN The system has detected a loss-of-pointer (LOP)
CR or MN The system has detected a loss-of-pointer (LOP)
CR or MN For STS-1 path ring applications, the bit error ratio
DDM-2000 OC-3 M
Issue 2, February 2000
Meaning
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: Failure of the far end STS1E circuit
pack or failure of the STS1E circuit pack at the near
end.
condition. A valid STS-1 pointer could not be found
for eight consecutive frames in the identified STS-1
signal.
Likely causes: 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.
condition. A valid STS-1 pointer could not be found
for eight consecutive frames in the identified STS-1
signal.
Likely causes: 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.
condition. A valid STS-1 pointer could not be found
for eight consecutive frames in the identified STS-1
signal.
Likely causes: If this condition occurs on the
STS-1 on both OC-12 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-12 line, the likely cause is failure of the
OLIU circuit pack at the near end or far end.
(BER) of the specified STS-1 signal exceeds the
user-provisioned signal degrade threshold.
Likely cause: Failure at a fiber or failure of an
OLIU circuit pack at some point in the STS-1 path.
ULTIPLEXER
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