Avaya Definity SI Maintenance Manual page 1019

ATM-TRK (Circuit Emulation Service Circuit Pack)
4. Perform ATM loopback tests on the near-end ATM-TRK circuit pack
5. Check capacity and peak bandwidth consumption for the ATM span.
h. Error Type 771: the ATM switch is sending cells with unknown Virtual
Path-Identifier (VPI) and Virtual Channel-Identifier (VCI) addresses.
1. Make sure that the ATM-TRK circuit-pack address is administered
i. Error Type 1281: Board major signals error (loss of high-level signal). The
far-end has detected a major problem in transmissions originating from the
ATM-TRK circuit pack. The possible Aux Data values for this software
counter are listed in
Table 10-93. Error type 1281 Aux Data and repair procedures
Aux Alarm
Data Description
15 SYSCLOCK failed
555-233-123
and on the far-end circuit pack or ATM switch.
If
The ATM-TRK circuit pack
fails the loopback test.
The far-end circuit pack or
ATM switch fails the
loopback test.
The equipment at each end
of the ATM span passes
the loopback test
If
The capacity of the span is
inadequate or bandwidth
consumption is too high.
identically on the ATM switch and the Avaya DEFINITY Server.
Table 10-93.
Repair procedure
The board is not locked to the TDM backplane clock signal. This is
probably due to a Tone Clock problem.
Check for TDM-BUS or TONE-BD errors in the Error Log.
If no other problems are present, reset the circuit pack (reset board
UUCSS)
Then
The problem is in the ATM-TRK circuit
pack. Replace the circuit pack.
The problem is in the far-end circuit pack
or ATM switch. Consult the circuit-pack or
ATM switch documentation for advice.
The problem is somewhere in the ATM
span. Lack of bandwidth can be forcing
an intermediate ATM switch to drop cells.
Then
Reduce traffic on the Avaya DEFINITY
Server to ensure that it is using no more
that its subscribed bandwidth.
Continued on next page
Issue 4 May 2002 10-233