AT&T Partner II - Manual (Page 128)

Intercom Ringing Patterns and Dial Tones
If you have an MLS- or MLC-model phone and someone makes an intercom call
to your phone, you will hear a ring and a beep (ring BEEP. . . ring BEEP. . .
ring BEEP . . .). If you have a standard phone, you will hear a repeated pattern
of two rings (RING ring . . . RING ring . . . RING ring. . .).
When you press [ Intercom ] to make an intercom call, you hear the intercom dial
tone that is generated when you use an internal line.
Hands-Free Answer on Intercom (HFAI)
Hands-Free Answer on Intercom is a feature that lets you answer voice-paged
calls without lifting the handset or turning on the microphone. HFAI is available
on MLS-34D, MLS-12D, and MLS-12 phones; it is not available on MLS-6 or
MLC-6 phones because they do not have microphones.
When someone pages your phone, it beeps to indicate that your phone’s
speaker has been turned on automatically, and you hear the caller’s voice over
your speaker. To use HFAI, leave your phone’s microphone on all the time.
Then, you can simply start talking when you hear a caller, to respond without
lifting the handset.
NOTES:
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2.
The HFAI feature can be turned on or off only when your phone is idle.
Muting your voice while you are on a call turns off the microphone only for the
duration of the call.
If you are speaking on a call, you will not hear any other pages to your
extension.
B-2 Using Intercom Features