Avaya 03-300430 User Manual

The Maintenance/Test packet-bus port (M/T-PKT) is Port #4 on the TN771D Maintenance/Test 
circuit pack. The packet-bus port provides the following packet-bus maintenance functions:

●

Packet-bus fault detection

The ability to detect faults (for example, shorts, open leads) on the packet bus 
autonomously (i.e., without Communication Manager involvement).

●

Packet-bus re-configuration

The ability to swap faulty leads with spare leads autonomously so that the packet bus 
remains operational. This is accomplished by sending a message to every circuit pack 
using the packet bus (for example, TN556 ISDN-BRI), telling it which spare leads to use on 
the bus.

M/T-PKT maintenance ensures that these maintenance functions are operating correctly. The 
Maintenance/Test packet-bus port is alarmed if maintenance determines that the port’s 
maintenance functions are operating incorrectly.
When M/T-PKT maintenance determines that the packet-bus port is defective, the packet-bus 
fault-detection and re-configuration functions provided by the port will be turned off.
M/T-PKT maintenance interacts with packet-bus maintenance. Therefore, there may be alarms 
on the packet bus when there is a fault on the M/T-PKT. For further information, refer to the 
PKT-BUS MO’s section.

M/T-PKT

MIN

test port location l 

Maintenance/Test Packet Bus port

M/T-PKT

WRN

release port location 

Maintenance/Test Packet Bus port

0 (

)

0

Any

Any

Any

1 (

)

41018

none

MIN

ON

test port location l r 3

 1 of 2