AT&T MERLIN LEGEND Calling Group Supervizor's Manual page 30

Calling Group Supervisor Telephones
Calls-in-Queue Alarm Button. This button is programmed
with the extension number for the calling group so you
can monitor the queue for that group. You need one
Calls-in-Queue Alarm button for each calling group you
supervise. When the number of calls in the queue reaches
a programmed limit, the light next to the button goes on
and remains on until the number drops below the limit.
Agent phones can also be programmed with a
Calls-in-Queue Alarm button for monitoring the queue.
These buttons can also be used to automatically dial the
calling group's extension.
2-16 Buttons on Your Phone