TAP-107 : Trouble Clearing 363-206-285
Page 13 of 28 Issue 2, February 2000
DDM-2000 OC-3 MULTIPLEXER
inc. EC1 LOS CR, MJ
MN or
None
The system has detected loss of signal (LOS)
condition on the EC-1 line.
Likely cause: Failure of the STS1E or equivalent
circuit pack at far end, failure of the incoming cable,
failure of the STS1E circuit pack at the near end, or
a cable disconnect at the STSX-1 or shelf
connector.
inc. EC1 line AIS CR, MJ
MN or
None
The system has detected the EC-1 line alarm
indication signal (AIS) on an incoming EC-1 line.
Likely cause: Failure of an STS1E circuit pack at
the far end.
inc. EC1 sig degrade (BER) CR, MJ,
MN, or
None
The bit error ratio (BER) in the received EC-1
signal exceeds the provisioned threshold, 10
–5
or
10
–9
.
Likely causes: Failure of the STS1E circuit pack at
the near end, failure of the incoming cable,
cross-talk in office wiring, or failure of the STS1E
circuit pack at the far end.
inc. EC1 sig failed (BER) CR, MJ,
MN, or
None
The bit error ratio (BER) in the received EC-1
signal exceeds the provisioned threshold of 10
–5
or
10
–9
.
Likely causes: Failure of the STS1E circuit pack at
the near end, failure of the incoming cable,
cross-talk in office wiring, or failure of the STS1E
circuit pack at the far end.
inc LAN fail (from cust_lan) MJ This message indicates cable disconnect from the
10/100BaseT interface of the IMA LAN circuit pack.
If the cable is connected this alarm indicates that
the IMA LAN circuit pack is not receiving valid link
test pulses from other LAN terminating equipment.
The following guidelines are used for AIDs in this
case: If the IMA LAN circuit pack is in LOW SPEED
GROUP-A-1 and LOW SPEED GROUP-A-2 and
the LAN interface fails, this alarm is created, and
ONLY the first port address a-1 is used; even if
multiple cross-connected channels already exist on
the circuit pack.
TableB–RTRV-ALMMessageDescriptions(Continued)
Description
Alarm
Level Meaning
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