Lucent Technologies DDM-2000 OC-3, User & Service Manual

Page: 2008 / 2536

363-206-285 Trouble Clearing:
TAP-112
Issue 2, February 2000 Page 10 of 16
DDM-2000 OC-3 M
ULTIPLEXER
15. 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].
16. STOP. YOU HAVE COMPLETED THIS PROCEDURE.
17. 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
18. STOP. YOU HAVE COMPLETED THIS PROCEDURE.
19. Have two of the same type (service and protection TGS, TG3, MXRVO,
STS1E, DS3, or TMUX) circuit packs been removed from the system?
If YES, then continue with Step 20.
If NO, then proceed to Step 22.
20. Determine the reason the circuit packs were removed. If the same circuit pack
is to be reinserted and no switch settings are changed, reinstall the circuit
pack. If the circuit pack was removed and switch settings changed, reinstall the
circuit pack and momentarily depress the UPD/INIT button on the SYSCTL. If
the circuit pack is not to be reinserted, momentarily depress the UPD/INIT
button on the SYSCTL to remove the circuit pack from the inventory.
21. STOP. YOU HAVE COMPLETED THIS PROCEDURE.
22. Is ED-8C733-30, G7 Fan Shelf installed?
If YES, then continue with Step 23.
If NO, then proceed to Step 25.
23. Is POWER ON LED lighted on fan shelf?
If YES, then continue with Step 24.
If NO, then go to TAP-118.
DLP-523
TAP-118