User manual

DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Object Repair Procedures
Page 10-804MET-LINE (MET Line)
10
Figure 10-65. MET Line Interactions
A change in the use of the Recall button on the MET set needs to be noted.
Instead of being used as it was in earlier PBX systems, the Recall button is used
in this system as a self-test button and, when pressed, lights all of the lamps on
the MET set and runs the ringer update.
This section refers only to the MET-LINE (MET Line) maintenance that is
performed. Note that MET-LINE (MET Line) maintenance is closely related to,
and interacts with, the MET-BD (MET Line circuit pack) maintenance in some
instances. Some of the results of maintenance testing of the MET Line may be
affected by the health of the MET Line circuit pack. This interaction should be
kept in mind when investigating the cause of reports of MET Line problems.
There are instances in this section where service states of a station are
mentioned. It is helpful to understand what is meant by the different service
states that may exist. An explanation of these service states follows:
■ Out-of-Service—The port, and thus the station, have been removed from
service. A busyout of a port causes it to be out-of-service.
■ Ready-for-Service—Once a port on the circuit pack has been put into
service, the voice terminal must communicate that it is present. The time
between these two events is the time when the terminal is in the
ready-for-service state.
PBX
PORT
(1)
VOICE
TERMINAL
PORT
VOICE
(4)
MET LINE
CIRCUIT
PACK
MET
LINE
TERMINAL
MET LINE
MET LINE