Avaya 03-300430 User Manual

The TN735 MET Line circuit pack supports four Multibutton Electronic Telephone (MET) station 
sets. Each MET set uses three pairs of wires: an analog voice pair, a transmit pair, and a 
receive pair. Power is sent over the transmit and receive pairs. The MET Line circuit pack 
supports every 10-, 20-, and 30-button set.
This section describes MET-LINE (MET Line) maintenance. MET-LINE maintenance is closely 
related to, and interacts with, MET-BD (MET Line circuit pack) maintenance. This interaction 
should be kept in mind when troubleshooting MET Line problems.
This section occasionally refers to a station’s service states. The service states are defined as 
follows:

Use status station to determine terminal service state. Status is reported as out-of-service, 

in-service, or disconnect, which means the station is in the ready-for-service state.

MET-LINE

MIN

test port location l

MET Line

MET-LINE

WRN

test port location sh

MET Line

Out-of-Service

The port, and thus the station, have been removed from service. 

A busyout of a port will cause it to be out-of-service.

Ready-for-Service

The port on the circuit pack has been put into service, but the 

voice terminal has not yet established signaling 

communications with the port.

In-Service

The voice terminal has established signaling communications 

with the port, and the system is ready to process calls to and 

from that station. A terminal in the ready-for-service state will 

progress to the in-service state if it is functioning normally, but it 

can also be forced into the in-service state if it goes off-hook.