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DEFINITY ECS Release 8.2 ATM Installation,
Upgrades, and Administration  
555-233-124  
Issue 1
April 2000
Troubleshooting 
6-22
Troubleshooting ATM-PNC 
6
Troubleshooting interoperability 
This section covers the following ATM interoperability topics:
—Checks for correct ATM installation and 
configuration
—Checks for correct DEFINITY ECS and ATM switch 
administration
—Checks LED status, circuit pack insertion, 
and demand tests
—Checks the interoperability between the 
DEFINITY ECS switch and the ATM switch
Because Lucent offers a variety of ATM switches, this discussion suggests 
general rather than specific diagnostics.
Physical connections
Has the ATM switch been installed and configured correctly?
Diagnostics
Is the ATM switch powered up?
If you are administering the ATM switch through a locally attached 
console, is there a local console terminal connected to the console port on 
the ATM switch processor circuit pack with the correctly pinned RS232 
serial cable?
If you are administering the ATM switch through telnet over the Ethernet, is 
there an Ethernet drop plugged into the Ethernet port on the ATM switch 
processor board? (Note that a few ATM switch commands are only 
permitted over the local console terminal.)
12.
Escalate if necessary
If the DS1 circuit pack tests OK, go to step 13.
If step 11 still fails, escalate to Tier 3 or replace the splitter.
13.
Release the circuit 
pack
Release the DS1 circuit pack (release board 
UUCSS).
14.
Verify active 
synchronization 
source
Verify that the designated DS1 circuit pack is now the 
active sync source (status synchronization).
Table 6-9. Troubleshooting 401A/402A/403A synchronization — Continued
Step
Action
Description
Continued on next page