Lucent Technologies Comcode 108678723 manual Possible causes

DEFINITY ECS Release 8.2 ATM Installation,	Issue 1
Upgrades, and Administration 555-233-124	April 2000
6 Troubleshooting
Troubleshooting ATM-PNC	6-32

■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.

DEFINITY

DEFINITY

PPN

CaPro

TN230X

Fiber

	ATM call control
Q.93B				Q.93B
			Switch
Q.SAAL				Q.SAAL
		processor
ATM			Switch	ATM
SONET			fabric	SONET
Physical				Physical
		Port boards

Fiber

EPN

TN230X

iodatrb LJK 052899

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