Avaya DEFINITY Server CSI, Руководство по обслуживанию, Страница: 1454 / 1930

Maintenance Objects
1454
Issue 5 October 2002
PKT-BUS (Packet Bus)
The Packet Bus consists of a single bus, and one such bus appears in the
system. There is one instance of the Packet Bus maintenance object.
The Packet Bus is used to carry ISDN-BRI, ISDN-PRI, and ASAI signaling
information. The SPE interface to the Packet Bus is the second Packet Interface
instance (PKT-INT, instance1A2) on the TN2402/TN798 Processor Circuit Pack,
which works in concert with the Bus Bridge circuitry on the TN799 C-LAN circuit
pack to provide Packet Bus access. Packet Bus maintenance is performed only
when the
Packet Intf2?
field on the Maintenance-Related System Parameters
form is set to
y
. Packet Bus testing is dependent on the following hardware
components:
■
TN771 Maintenance/Test circuit pack, M/T-PKT port
■
TN2402/TN798 Processor circuit pack, PKT-INT instance 1A2
■
TN556 ISDN-BRI Line circuit pack
Packet Bus tests may abort if some of this hardware is not present in the system.
Also, these tests may yield inconsistent results if some of this hardware is
defective.
The interactions between the Packet Bus and the circuit packs that use the bus
are complex. For this reason, the Packet Bus can be alarmed due to a circuit pack
failure and, conversely, circuit packs can be alarmed due to a Packet Bus failure.
This section on PKT-BUS is limited to a description of the Error and Alarm Log
entries for the Packet Bus maintenance object and to a description of the Packet
Bus test sequence.
NOTE:
See the “Packet Bus Fault Isolation and Correction” in the latest issue of
Maintenance for Avaya Server SI, 555-233-123
for a complete discussion of
Packet Bus maintenance, and also the interactions of the bus with the
Packet circuit packs. The chapter discusses fault isolation and correction
procedures, and it should be referenced for all procedures and required
decisions. The “Packet Bus Fault Isolation Flowchart” section is the normal
starting point for experienced technicians, but technicians who are
unfamiliar with the Packet Bus and its use should refer to the introductory
material.
MO Name (in
Alarm Log)
Alarm
Level Initial Command to Run Full Name of MO
PKT-BUS MAJOR test pkt port l r 2 Packet Bus
PKT-BUS MINOR test pkt port l Packet Bus
PKT-BUS WARNING test pkt port l Packet Bus