DLP-554: Detailed Level Procedure 363-206-285
Page 9 of 22 Issue 2, February 2000
DDM-2000 OC-3 MULTIPLEXER
37. Check for line code (AMI/B8ZS) mismatch at near end and far end. If mismatch
is found, set line code [DLP-513] to correct value and repeat this test. If no
trouble is found, continue with the next step.
38. In some releases, if dlc=yes as set by the set-t1: command, loopbacks
are not recognized (loopback not recognized)inthistest.Use
rtrv-t1: command to check if dlc=yes.
39. Is dlc set to yes?
If YES, then continue with Step 40.
If NO, then proceed to Step 41.
40. Use set-t1: command to temporarily set dlc=no and repeat this test. If the
test fails again, continue with the next step.
41. Has the DS1/DS1PM circuit pack that failed the test been replaced?
If YES, then proceed to Step 44.
If NO, then continue with Step 42.
42. Replace the DS1/DS1PM circuit pack that failed the test.
Reference: DLP-523
43. Repeat this procedure for the DS1/DS1PM circuit pack that failed.
44. Trouble may be in the DSX cross-connect wiring, VT1/STS1 cross-connections
in the network (if ring configuration), or the shelf backplane. Use the rtrv-crs-( )
command to ensure proper VT1/STS1 cross-connections have been made at
each shelf in the ring for the DS1 being tested. If no trouble found, check DSX
cross-connect wiring and backplane connections. If other alarms or trouble
indications are present, refer to Trouble Clearing: IXL-001 to isolate the
trouble. If no alarms or indications are present and a CIT is available, use the
RETRIEVE commands (for example, rtrv-alm, rtrv-hsty, etc.) to check
for other trouble indications.
45. STOP. YOU HAVE COMPLETED THIS PROCEDURE.
DLP-523
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