User's Manual

DEFINITY ECS Release 8.2 Maintenance for R8.2csi 555-233-119 Issue 1
April 2000
Maintenance for csi systems
1-133Unusual ATM trouble conditions
1
Incorrectly typed or omitted EPN Route or End
System Identifier (A500)
Symptoms
Talk paths are one-way, from the PPN to the EPN: you can hear tones from the
PPN end station to the EPN end station but not vice versa. Because the signaling
channels are bidirectional virtual circuits (VCs) established from the PPN to the
EPN, these can be routed correctly and come up just fine. Talk paths are two
unidirectional virtual circuits, so a single call has one VC from the PPN to the EPN
(which is routed correctly) and one VC from the EPN to the PPN (which cannot be
routed).
Diagnostics
1. At the A500 use the
show signaling routes
or
show signaling esi
command(s) as appropriate to check the ATM addresses.
2. Use
show signaling stats
port q93b
on the EPN port and look for Cause
Code 3 (
No route to destination
).
Action
1. Correct the ATM address translations in the A500.
Swapped Routes, End System Identifiers, or Fiber
between a PPN and an EPN
Symptoms
■ An incorrectly-connected EPN TN230X does not complete board insertion.
■ 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. The
show switch circuittable
command on the A500 shows VBR control
channels from the A500 port intended for the incorrectly-connected EPN
(but actually connected logically or physically to the PPN) that should not
exist.