Lucent DDM-2000 OC-3 User And Service Manual page 657

TAP-107
: Trouble Clearing
Page 13 of 28
Table B – RTRV-ALM Message Descriptions (Continued)
Description
inc. EC1 LOS
inc. EC1 line AIS
inc. EC1 sig degrade (BER)
inc. EC1 sig failed (BER)
inc LAN fail (from cust_lan)
Alarm
Level
CR, MJ
MN or
None
CR, MJ
MN or
None
CR, MJ,
MN, or
None
CR, MJ,
MN, or
None
MJ
DDM-2000 OC-3 M
Issue 2, February 2000
Meaning
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.
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.
The bit error ratio (BER) in the received EC-1
signal exceeds the provisioned threshold, 10
–9
10 .
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.
The bit error ratio (BER) in the received EC-1
signal exceeds the provisioned threshold of 10
–9
10 .
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.
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.
ULTIPLEXER
363-206-285
–5
or
–5
or