Lucent DDM-2000 OC-3 User And Service Manual page 623

TAP-102
:Trouble Clearing
Page 7 of 14
Table A – Major (MJ) Alarm Conditions (Continued)
Alarm Level or
LED Indication Trouble Description (Note)
MAJOR. MJ LED
unsupported DCC connection
lighted.
X.25 communication failure
Note: Similar descriptions of trouble may also appear in the CIT Alarm and Status Report.
* May be provisioned for Critical, Major, Minor or no alarm.
† May be provisioned for Major, Minor or no alarm.
6. Switch service to protection. If LED is flashing on protection DS1/DS1PM or
T1EXT issue trouble report of bad incoming signal at input to DS1/DS1PM or
T1EXT circuit pack with flashing LED(s). If LED is not flashing on protection
DS1/DS1PM or T1EXT circuit pack, replace service DS1/DS1PM or T1EXT
circuit pack [DLP-523].
7. STOP. YOU HAVE COMPLETED THIS PROCEDURE.
8. Switch service to protection. If LED is flashing on protection DS3/STS1E,
issue trouble report of bad incoming DS3/EC-1 signal from DSX-3/STSX
cross-connect point. If LED is not flashing on protection DS3/STS1E, replace
service DS3/STS1E circuit pack [DLP-523].
9. STOP. YOU HAVE COMPLETED THIS PROCEDURE.
10. Check TGS/TG3 option switches for proper line coding and frame format
settings (rtrv-sync). If no trouble found, check incoming timing reference
signals. If timing reference signals are bad, issue trouble report of bad
incoming timing reference signal(s). If no trouble found with timing references,
replace TGS/TG3 circuit packs.
Reference: DLP-523
11. STOP. YOU HAVE COMPLETED THIS PROCEDURE.
DDM-2000 OC-3 M
Issue 2, February 2000
Likely causes
DCC is enabled on an OC-1
connection between the MAIN
slots in two OC-3 shelves. The
DDM-2000 OC-3 system does
not support a DCC link over an
OC-1 line terminating on the
MAIN slots between two OC-3
shelves.
X.25 communication eqpt.
failed; failure at the OS.
ULTIPLEXER
363-206-285
Step or
Procedure
Use set-fecom
command to
disable the DCC
on the OC-1
interface.
Issue trouble
report to OS.