AT&T SYSTEM 25 User Manual page 10

Support Information (Contd)
Loop Buttons
The voice communications paths between your console and
the system switch are called loops. Your Switched Loop
Attendant Console gets its name from the system's ability
to hold incoming attendant-bound calls in a queue and
switch them to the console by way of these voice loops.
Calls are directed to the console in a predetermined,
prioritized sequence. The console receives the calls one at a
time; while you are busy with a call, any other calls will wait
in the queue until you are ready for the next one.
You will answer all incoming calls at the five <LOOP>
buttons on the upper left side of the console. The loops
also carry all calls placed from the console, although other
buttons (such as those on the Selector Console) may be
used to start the calls.
Automatic Loop Selection
Whenever an incoming call is ringing, lifting the handset
(going off-hook) automatically connects you to the caller. If
your console is idle and you want to place a call, lifting the
handset automatically gets dial tone for your call at one of
the <LOOP> buttons.
In a few situations, you may have to press a <LOOP>
button when you answer or place a call. The console
procedures will provide specific instructions when this is
necessary.
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