AT&T MERLIN LEGEND Release 4.0 Feature Reference page 30

Feature Reference
Considerations and Constraints
As soon as the system detects a problem, the red LED next to the Alarm button
turns on and/or the maintenance alert sounds or flashes.
All system operator consoles with an Alarm button receive the indication.
Telephone Differences
Alarm buttons can be programmed only on system operator consoles.
Direct-Line Consoles
An Alarm button is factory-assigned on an analog DLC but not on an MLX DLC.
An operator at an MLX DLC can use the Inspect feature to display the number
of alarms; an analog DLC operator cannot use Inspect.
On a system with fewer than 29 lines, an Alarm button is factory-assigned to
analog DLCs with 34 or more buttons.
On a system with more than 29 lines, Alarm is replaced with line 30. The Alarm
button is not a fixed feature and can be assigned to any available button on an
analog or MLX DLC.
Queued Call Consoles
Alarm buttons can be programmed only on system operator consoles.
An Alarm button is a fixed feature on a QCC.
A QCC operator can use the Inspect feature to display the number of alarms.
Feature Interactions
Automatic
Maintenance Busy
Inspect
Personal Lines
Pools
30
Alarm
The red LED turns on next to the Alarm button on system operator
consoles, and the designated maintenance alert device sounds or
flashes when more than 50 percent of the trunks in the trunk pool are in
a maintenance-busy state.
Inspect can be used on an MLX DLC or a QCC to display the number of
alarms. Inspect cannot be used on an analog DLC.
A line or trunk jack used for a maintenance alarm cannot be assigned
as a personal line.
A trunk jack used for a maintenance alarm cannot be assigned to a
trunk pool (Hybrid/PBX mode only).