Lucent Technologies Comcode 108678723 manual Inspecting LEDs

DEFINITY ECS Release 8.2 ATM Installation,	Issue 1
Upgrades, and Administration 555-233-124	April 2000
6 Troubleshooting
Troubleshooting ATM-PNC	6-17

■Troubleshooting interoperability—Provides guidelines for troubleshooting

■Physical connections

■Administration

■TN2305/TN2306 circuit pack

■ATM signaling architecture

■Unusual ATM trouble conditions—Describesdifficult-to-diagnose failure modes in the DEFINITY ECS and ATM switch combinations.

■DEFINITY ECS ATM-PNC troubleshooting commands—Describes the following specific troubleshooting commands:

■change/display atm pnc-pairs

■list measurements atm pnc-latency

Inspecting LEDs

To get a high-level status of the system, observe the LEDs on the TN2305/TN2306 ATM interface circuit packs and the ATM switch. For information on interpreting the LEDs on the ATM switch, refer to your switch’s quick reference guide. For information on interpreting the LEDs on the TN2305/TN2306 circuit packs, refer to the following book:

■DEFINITY Enterprise Communications Server Release 8 Maintenance for R8r

Troubleshooting synchronization (400A only)

Connected through an ICSU

To troubleshoot 400A synchronization problems in systems where the synchronization signal connects through an ICSU, follow the procedures in Table 6-7.

Table 6-7. Troubleshooting 400A synchronization (through an ICSU)

√	Step	Action	Description
	1.	Check all connections	If the LEDs on the DS1 circuit pack indicate an error
			condition, or any of the tests associated with testing the
			DS1 circuit pack fails, recheck all cables, connectors, and
			the splitter connection to the back of the DS1 circuit pack.
	2.	Test the circuit pack	Test the circuit pack (test board UUCSS).
			If the tests pass, go to step 14 (release). If a test fails,
			continue with step 3.