Lucent DDM-2000 OC-3 User And Service Manual page 654

363-206-285
Issue 2, February 2000
Table B – RTRV-ALM Message Descriptions (Continued)
Description
illegal CP type
LAN CP failed
inc. (from DSX) DS1 LOS
inc.(from DSX) DS1 sig fail
inc. DS1 sync. ref. AIS
inc. DS1 sync. ref. BER
Alarm
Level
CR, MJ or
MN
MJ
MJ, MN or
None
MJ, MN or
None
MJ or MN
MJ or MN
DDM-2000 OC-3 M
Trouble Clearing:
Meaning
(5) the system is provisioned for sync message
signaling, but the upstream system from which it
loop-times has not been provisioned for sync
message signaling. The condition can be cleared
by provisioning both systems the same
(set-sync: and rtrv-sync: commands).
Condition can be cleared by repairing at least one
of timing references (if both are failed) and
resetting synchronization mode protection switch
with command
switch-sync:s=mode,pri=reset. In a central
office system, the synchronization mode can also
be reset with a TBOS control point.
An illegal or unknown circuit pack type has been
inserted into the shelf.
Internal equipment failure of the specified IMA LAN
circuit pack.
At least 128 consecutive zeros are received in the
DS1 signal incoming from the DSX-1, or the energy
at the DS1 input is below a preset threshold.
Likely causes: Hard failure of upstream
equipment or facility (towards the DSX-1). The
DS1 input is disconnected at the backplane or the
DSX-1; equipment is failed or removed at DSX-1.
The bit error ratio (BER) in the DS1 signal incoming
from the DSX-1 exceeds the provisioned failure
–3 –6
threshold, 10 , 10 , 10
Likely causes: Mismatch of line code (AMI/B8ZS).
Failure of upstream equipment or facility (towards
the DSX-1). Cross-talk in office wiring. Failure of
the DS1/DS1PM circuit pack.
DS1 alarm indication signal (AIS) is being received
from the DS1 synchronization reference signal.
Likely causes: Failure of upstream equipment or
facility (towards the DSX-1).
The bit error ratio (BER) in the DS1
synchronization reference signal exceeds 10
Likely causes: Failure of upstream equipment or
facility (towards the DSX-1).
ULTIPLEXER
TAP-107
Page 10 of 28
–7 –8
, or 10 .
–3
.