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DEFINITY ECS Release 8.2 ATM Installation,
Upgrades, and Administration
555-233-124
Issue 1
April 2000
Troubleshooting
6-16Troubleshooting ATM-PNC
6
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-group
trkgrpnbr
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 switc h
■ Troubleshooting synchronization (400A only)—
■ Connected through an ICSU
■ Connected through a DSU/CSU