Lucent Technologies Comcode 108678723 Troubleshooting 400A T1 synchronization through a DSU/CSU

DEFINITY ECS Release 8.2 ATM Installation,	Issue 1
Upgrades, and Administration 555-233-124	April 2000

6Troubleshooting

	Troubleshooting ATM-PNC	6-20
Table 6-8. Troubleshooting 400A T1 synchronization (through a DSU/CSU) —
√	Step Action	Description

15.If the 316X CSU or DSU/CSU fails the DTE or RLB loopback tests

Remove the H600-307 DS1 cable from the splitter and the splitter from the DS1 circuit pack

16.	Remove splitter	Remove the splitter from the DS1 circuit pack
17.	Reconnect the cable	Reconnect the H600-307 cable directly to the DS1 circuit
		pack
		After about 30 s, all the alarm LEDs on the 316X DSU/CSU
		should go out.
		If the alarm LEDs on the 316X CSU or DSU/CSU do not go
		out, go to step 19.
18.	Test circuit pack	Test the DS1 circuit pack (test board UUCSS).
		If any one of Test 138 through 145 fails, follow the repair
		procedures listed in DEFINITY ECS Maintenance for R8r.
19.	Check for errors	Wait 15 minutes and check that the list measurements
		ds1 summary UUCSS report is free of any errors. Use
		Table 3-6 to help interpret the report.
20.	Replace the splitter	If the alarm LEDs on the 316X are not lit, replace the
		splitter. If the splitter has already been replaced, escalate
		to Tier 3.
21.	Test the DS1 circuit	If the alarm LEDs on the 316X extinguish with the new
	pack	splitter installed, perform a test board UUCSS and press
		Enter and verify that the DS1 circuit pack passes tests 138
		through 145.
		If any one of Test 138 through 145 fails, follow the repair
		procedures listed in DEFINITY ECS Maintenance for R8r.
22.	Check error report	Wait 15 minutes and perform a list measurements ds1
		summary UUCSS and verify that the DS1 circuit pack is
		free of errors. Use Table 3-6 to help interpret the report.
23.	Release circuit pack	If there are no errors in step 22, release the DS1 circuit
		pack (release board UUCSS).
24.	If the alarm LEDs on	Reseat the DS1 circuit pack.
	the 316X fail to go out
25.	Escalate if necessary	If step 24 still fails, escalate to Tier 3