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DEFINITY ECS Release 8.2 ATM Installation,
Upgrades, and Administration
555-233-124
Issue 1
April 2000
Troubleshooting
6-32Troubleshooting ATM-PNC
6
■ The
Result
field should show
PASS
for each test number. If any of
the tests fail, refer to the ATM-EI maintenance objects in DEFINITY
ECS Maintenance for R8r.
Possible causes
1. The TN2305/TN2306 circuit pack is in a slot different from the DEFINITY
administration.
2. The TN2305/TN2306 was not completely inserted.
ATM signaling architecture
Troubleshooting interoperability between the DEFINITY ECS switch and the ATM
switch involves understanding the architecture of ATM signaling (Figure 6-3
). A
Lucent Cajun A500 is used to show this concept.
Figure 6-3. ATM signaling architecture
The following list shows the ATM-stack layers discussed in this section:
■ Physical layer
■ SONET/SDH layer
■ Q.SAAL (data link) layer
■ ATM call control
■ Call processing (CaPro) Layer
TN230X
DEFINITY
PPN
DEFINITY
EPN
Fiber Fiber
iodatrb LJK 052899
A500
ATM call control
Port boards
Switch
processor
Switch
fabric
Q.93B
Q.SAAL
ATM
SONET
Physical
Q.93B
Q.SAAL
ATM
SONET
Physical
CaPro
TN230X