Lucent Technologies Comcode 108678723 manual Screen 6-2. System links information

DEFINITY ECS Release 8.2 ATM Installation,	Issue 1
Upgrades, and Administration 555-233-124	April 2000
6 Troubleshooting
Troubleshooting ATM-CES	6-14

1. Type list sys-linkand press Enter. Screen 6-2 shows the screen output.

list sys-link
		SYSTEM LINKS INFORMATION
Location	Link Type/	State	Current	Faulted	Last Fault
	Channel		Path	Path	Recorded
02A0101	EAL	up	present	present	12/06/1997 16:20
01B0202	PACL	up	present	present	12/06/1997 16:17
02A0102	PACL	up	present	present	12/06/1997 16:20

Screen 6-2. System links information

Ensure that the fields have the values indicated below.

Link Type/	One PACL to each TN2305/TN2306 in either a PPN or an
Channel	EPN, and one EAL to each TN2305/TN2306 in an EPN.
State	up

2.On the ATM switch console, look at the switch circuit.

The VBRnrt (Variable Bit Rate) virtual circuits between the ATM switch PPN and EPN ports are used for signaling between the PPN and each EPN.

■These are established once when initialized under control of DEFINITY Call Processing. They represent the ATM Control Link (ACL) and Expansion Archangel Link (EAL).

■VBRnrt virtual circuits are also used for ISDN channels between DEFINITY port networks.

■Other VBRnrt virtual circuits may exist between ATM switch ports that are not associated with DEFINITY port networks. A common use of VBRnrt circuits is multimedia and video-conferencing systems.

Are talk paths being established between port networks?

Diagnostics.

■Can you talk both ways on a set on one port network dialed from another port network and vice versa?

—The CBR (Constant Bit Rate) virtual circuits (VCs) between ATM switch PPN port and ATM switch EPN port are used for talk paths between port networks (PPN to EPN, EPN to PPN, or EPN to EPN).

—They are established when calls are first setup between port networks. Each virtual circuit represents one party of a complete multiparty talk path.