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PKT-BUS (Packet Bus)
Issue 4 May 2002 10-1261 555-233-123
PKT-BUS (Packet Bus)
The Packet Bus consists of a single bus, and one such bus appears in each port
network. The Packet Bus in each port network is physically independent.
Therefore, there is one instance of the Packet Bus maintenance object for each
port network.
In DEFINITY, the Packet Bus is used to carry ISDN-BRI, ISDN-PRI, and ASAI
signaling information. In pre-R7si systems, the SPE interface to the Packet Bus is
the TN778 Packet Control circuit pack (PKT-CTRL). Packet Bus maintenance is
performed only when the Packet Bus is enabled on the Maintenance-Related
System Parameters form. In R7si and later systems, the SPE interface to the
Packet Bus is the second instance of the Packet Interface (PKT-INT 1A2) on the
TN2401/TN794 NetPkt circuit pack. Packet Bus maintenance is always
performed, since the Packet Bus is enabled automatically at system boot.
Packet Bus testing is dependent on the following hardware components:
■
TN771 Maintenance/Test circuit pack, M/T-PKT port
■
TN778 Packet Control Circuit Pack (PKT-CTRL) for pre-R7si systems
■
TN2401/TN794 NetPkt Circuit Pack, Packet Interface 1A2 (PKT-INT) for
R7si and later systems
■
TN570 Expansion Interface circuit pack (EXP-INTF)
■
ISDN-BRI circuit packs (BRI-BD), C-LAN circuit packs (CLAN-BD), and
other circuit packs with Packet Bus interfaces.
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.
MO Name (in
Alarm Log)
Alarm
Level Initial Command to Run
1
1 Where P is an appropriate port network number determined from the PORT field on the
Alarm or Error Log.
Full Name of MO
PKT-BUS MAJOR test pkt P l r 2 Packet Bus
PKT-BUS MINOR test pkt P l Packet Bus
PKT-BUS WARNING test pkt P l Packet Bus