DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance Objects
3-885PKT-BUS (Packet Bus)
3
PKT-BUS (Packet Bus)
The Packet Bus consists of a single bus, a nd one such bus ap pears 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 TN798 Processor Circuit Pack, which
works in concert with the Bus Brid ge circuitry on the TN799 C-LAN c ircuit pack to
provide Packet Bus acc ess. Packet Bus maintenance is p erformed 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
■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 inconsisten t results if some of this hardware is
defective.
The interactions between the Packet Bus and the circuit pac ks that use the bus
are complex. For this reason, the Packet Bus can b e alarmed due to a c ircuit
pack failure and, c onversely, circuit packs c an be alarmed d ue to a Packet Bus
failure. This section on PKT-BUS is limited to a description of the Error and Alar m
Log entries for the Packet Bus maintenanc e object and to a d escription of the
Packet Bus test sequence.
NOTE:
Refer to Chapter 9, “Packet Bus Fault Isolation and Correc tion”, in
DEFINITY® Enterprise Communications Server Release 8.2, Maintenance for
R8si, 555-233-123, Issue 1, April 2000, Comcod e 108678715,for a complete
discussion of Packet Bus maintenanc e and also the interactions o f the bus
with the Packet circuit packs. The chapter discusses fault isolation and
correction proced ures, and it should b e referenced for all proc edures and
required decision s. The "Packet Bus Fault Isolation Flowchart" section of the
chapter is the normal starting point for experienc ed technicians; howe ver,
technicians who are unfamiliar with the Packet Bus and its use shoul d 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