Avaya S8700 Maintenance Manual page 377

TBRI-BD (TN2185 ISDN Trunk-Side BRI)
j. Error Type (2305, 3330): A critical failure in the Circuit Pack's Packet bus
interface. Possible causes include either a Packet bus fault or an on-board
fault, for example, the board received a bad CRC or invalid DLCI. If the
Packet bus is alarmed, see
page
increases the probability of errors due to Packet bus problems.
If there are no Packet bus alarms, reset the circuit pack with the busyout
board UUCSS and reset board UUCSS commands. If the Circuit Pack
Restart test (#594) passes, then the on-board circuitry is healthy. Retire
the alarm with the test board UUCSS long clear command. If the Circuit
Pack Restart test (#594) fails, replace the circuit pack.
k. The server's software detects an excessive number of up-link messages
from the TN2185 board within a certain time period. To prevent the faulty
board from flooding the switch with data, the switch software takes the
board out of service and alarms it. The switch software also tells the
Archangel to ignore up-link messages from the board.
When the board is alarmed due to this error, the switch software
periodically puts the board back in service and tells the Archangel to
process up-link messages from the board. If the problem still exists, the
software takes the circuit pack out of service again. If the circuit pack does
not exhibit the problem for a certain time period, then maintenance
software resolves the alarm and the circuit pack is left in service.
l. The circuit pack received an inconsistent down-link message (a bad
header, port number, data, subqualifier, or logical link) over the Control
Channel.
m. The board is receiving data from the bus faster than it can distribute the
data to its endpoints, causing the FIFO RAM buffer to overflow. This error
can occur occasionally due to the statistical sizing of the buffers. If it
occurs frequently, it may indicate a LAPD parameter mismatch. LAPD
should recover from this problem, but it may degrade the performance of
the LAN bus.
When this error is reported, maintenance reads and clears the board
counter and logs the problem in the maintenance error log.
n. Bad translation RAM detected, but the call continues by using another
translation location. The circuit pack reports this error when it cannot
update NPE/NCE memory and read it back. This error is not
service-affecting and can be ignored, but can lead to other types of errors
against this circuit pack.
555-233-142
''Isolating and Repairing Packet-Bus Faults'' on
4-38. The number of ISDN circuit packs displaying this error
Issue 1 May 2002 8-1073