Instruction manual

Features
Two types of Callback can be programmed for a telephone:
■ Automatic: Callback is activated automatically whenever the user
reaches a busy extension or when all trunks in a pool are busy. This is a
status feature that is set to On or Off for each telephone.
■ Selective: Callback is activated only when a user chooses—by dialing a
feature code or, on multiline telephones, by pressing a programmed
Selective Callback button. On MLX display telephones, a user can also
select the feature from the display.
With Automatic Callback, when a user reaches a busy extension or trunk pool,
he or she hears the queuing tone (five short beeps) instead of the busy tone.
This indicates that the system is putting the call into the Callback queue.
With Selective Callback, when the user reaches a busy extension, he or she
must activate Callback while listening to the busy signal. If the user tries to
make a call by using a pool in which all trunks are busy, the user hears a fast
busy signal immediately after dialing the pool dial-out code. After activating
Callback, the user receives dial tone; after all digits are dialed, the user receives
the queuing tone and the call is added to the Callback queue.
With both types of Callback, a user can either stay on the line until the call is
completed or hang up.
■ If the user stays on the line, the red and green LEDs are on next to the
line button used to make the call. When the busy extension or pool is
available, the user hears the dequeuing tone (three short beeps) and the
call is completed automatically.
■ If the user hangs up, the green LED flashes next to the line button,
indicating that the button is being held for the queued call. When the
busy extension or pool is available, the user hears a priority ring (four
bursts of ring on an MLX telephone and three bursts of ring on an analog
multiline telephone or single-line telephone). If the user does not answer
the Callback call within the number of rings programmed for the system
(1-6), the Callback request is canceled.
For an outside call, the system makes the call when a trunk is available, and the
user hears ringback. If the person being called picks up before the user
answers the ringback, the person being called is automatically put on hold and
hears Music-on-Hold.
For an inside call, the user hears ringback when the extension is available, but
the system does not make the call until the user picks up.
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Callback