Lucent Technologies Comcode 108678723 manual Troubleshooting ATM-PNC

DEFINITY ECS Release 8.2 ATM Installation,	Issue 1
Upgrades, and Administration 555-233-124	April 2000
6 Troubleshooting
Troubleshooting ATM-PNC	6-16

Swapped routes, end system identifiers, or fiber between a PPN and an EPN

Symptoms

■An incorrectly connected EPN TN2305/TN2306 circuit pack is not completely inserted.

■Dial tone is present on end stations on the PPN and on correctly connected EPNs, but no dial tone is present on the affected EPN end stations.

■Calls cannot be made between the PPN and the correctly connected EPNs because talk paths cannot be routed correctly.

Diagnostics

1.Check to see if the ATM switch shows VBR control channels from the ATM switch port intended for the incorrectly connected EPN (but actually connected logically or physically to the PPN) that should not exist.

Action

1.Correct the ATM addresses (or swap fibers) on the ATM switch between the incorrectly connected PPN and EPN.

DEFINITY ECS ATM-CES troubleshooting commands

If ATM-CES is enabled (change system-parameters customer-options), 2 commands become available:

■change/display signaling-group siggrpnbr lets you determine the number of channels and lets you know their slot location.

■change trunk-grouptrkgrpnbr lets you determine the number of trunks.

Troubleshooting ATM-PNC

This section describes the process for troubleshooting the DEFINITY ECS

ATM-PNC interface with the ATM switch.

■Inspecting LEDs—Describes the possible LED states on the

■TN2305/TN2306 ATM interface circuit packs

■ATM switch

■Troubleshooting synchronization (400A only)—

■Connected through an ICSU

■Connected through a DSU/CSU