TAP-112 : Trouble Clearing 363-206-285
Page 3 of 16 Issue 2, February 2000
DDM-2000 OC-3 MULTIPLEXER
Table A – Minor Alarm Conditions
Alarm Level or
LED Indication Trouble Description (Note) Likely causes Step or Procedure
MN LED lighted.
2nd CP required for
BBF3/BBF8
The BBF3/BBF3B DS1PM or
BBF8 HDSL CPs require both
FUNCTION UNITS slots in the
group to be equipped with
MXRVO or STS1E CPs.
Insert a second
MXRVO or STS1E
CP in the
companion
FUNCTIONUNITS
slot.
2nd CP required for
BBF6/BBF9
The BBF6 T1EXT or BBF9
IMA LAN CPs require both
FUNCTION UNITS slots in the
group to be equipped with
MXRVO CPs.
Insert a second
MXRVO CP in the
companion
FUNCTIONUNITS
slot.
–48V power/fuse FA|FB failed –48V power feeder or fuse on
User Panel failed.
Check –48V power
feeders or replace
fuse.
[DLP-555]
automatic protection switch
(APS) channel failed
Failure of near-end or far-end
protection OLIU CP in MAIN-2(P)
slot or failure of receive fiber on
the protection line at near end.
TAP-111
automatic protection switch
(APS) automatic lock
Four automatic switches of one
DS1/DS1PM CP in 10 minutes;
DS1 intermittent failure.
Replace
DS1/DS1PM CP.
[DLP-523]
CP not allowed - (crs) CP does not support the manual
cross-connection(s) currently
provisioned for this slot.
Change CP or
change
cross-connections
CP not allowed - (eqpt) A DS1 or DS1PM CP is installed
in a LOW SPEED slot associated
with FUNCTION UNITS slot
provisioned for DS3, STS1E_L
low speed, or OLIU CP service.
Remove
DS1/DS1PM CP or
change FUNCTION
UNITS slot to
MXRVO orSTS1E-H
high speed CP.
CP not allowed - (timing) When associated with TGS/TG3
slot, current CP switch settings do
not support the sync. timing
provisioned.
Change TGS/TG3
CP switches
[DLP-513] or change
sync. parameters
(set-sync:).
When associated with FUNCTION
UNITS slot C, CP type does not
support the current provisioned
sync. parameters.
Change circuit pack
type or change
timing options
See notes/footnotes at the end of this table.
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