Avaya Definity SI, Maintenance Manual, Page: 2051 / 2968

PKT-BUS (Packet Bus)
Issue 4 May 2002 10-1265 555-233-123
Notes:
a. Within the last minute, packet circuit packs have reported errors that
indicate a possible Packet Bus failure. The Aux Data value is 1 or 2,
indicating that only one or more than one Packet circuit pack (respectively)
have reported a possible Packet Bus failure.
b. Packet Bus maintenance has been unable to perform loop around tests
from the TN778 Packet Control circuit pack (PKT-CTRL) to itself. This
could indicate faults on the Packet Control circuit pack rather than on the
Packet Bus. Examine the Error and Alarm Logs for any such errors. This
error can occur only on pre-R7si systems.
c. The Maintenance/Test Packet Bus port for this port network has
determined that there are more Packet Bus faults than the port can correct.
The Aux Data value indicates the number of faulty leads.
d. Packet circuit packs have detected possible Packet Bus failures via in-line
error or background test failure. Examine the Error and Alarm logs for more
specific PKT-BUS errors.
e. The Maintenance/Test Packet Bus port has caused Packet Bus leads to be
swapped to spare leads. This error appears only in a Critical Reliability
system. The Aux Data value indicates the number of faulty leads. If this is
the only active error against the Packet Bus, the Packet Bus is still in
service. Therefore, due to the disruptive nature of the Packet Bus Fault
Isolation and Correction procedures, repairs should be deferred until a time
when these procedures cause the least interruption in service. This matter
is resolved via consultation with the customer. However, be sure not to
delay repairs for too long, since the switch is not able to recover from
another Packet Bus failure until the existing one is resolved. Use the
procedure described in
‘‘Special Precaution Concerning the TN771’’ on
page 9-18 to ensure that the Maintenance/Test is giving correct
information. This procedure may require that a new TN771 be taken to the
customer site.
f. The Maintenance/Test Packet Bus port has detected open leads on the
Packet Bus. The Aux Data value indicates the number of open leads.
g. Packet circuit pack, port, and endpoint maintenance has been disabled due
to a Packet Bus failure. The Aux Data value indicates which sources have
reported errors that have caused maintenance to be disabled. These
sources include the following:
■
In-line errors from Packet circuit packs.
■
Packet Bus Uncorrectable report from the Maintenance/Test Packet
Bus port.
■
Packet Bus Interface Failure report from the Packet Control.
(pre-R7si systems only)
■
In an EPN, packet circuit pack, port, and endpoint maintenance will
be disabled if a Packet Bus failure occurs in the PPN.