Specifications

If you prefer to dial and conduct calls without lifting the handset, you can use
the speaker and the microphone instead:
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To make a call without lifting the handset, press [ Spkr ] to get dial tone.
(Alternatively, press an idle line or intercom button, which automatically
turns on the [
Spkr ] and [ Mic ] if available.) Dial the number and you will hear
the call ringing. When the other party answers, you can talk without lifting
the handset. On MLS-6 phones (which have no microphone), you must
lift the handset to talk when the other party answers. You cannot listen
through the handset and the phone’s speaker at the same time.
To turn off the microphone when you are using the speaker, press [
Mic ].
This will mute your voice so the other party cannot hear you.
If you are already on a call (on an MLS-18D, MLS-12D, or MLS-12 phone),
you can switch from the handset to the speaker and microphone by
pressing [
Spkr ] and hanging up the handset. (Conversely, if you are using
the speaker and microphone and want to switch to the handset, lift the
handset and the speaker and microphone will turn off.
Use the Hands-Free Answer on Intercom (HFAI) feature to answer
voice-signaled calls without lifting the handset (see below).
Hands-Free Answer on Intercom (HFAI)
When you receive a voice-signaled intercom call, your phone beeps to indicate
that your speaker has been turned on automatically, and you hear the caller’s
voice over your phone’s speaker. If you leave your microphone on all the time,
you can start talking when you hear the caller, without lifting the handset. This
feature is called Hands-Free Answer on Intercom.
NOTE:
Since MLS-6 phones do not have microphones, users must lift the handset to
answer voice-signaled intercom calls to these phones.
Any user in the system can make a voice-signaled intercom call to a system
phone by pressing [
★ ] and then dialing an extension number. (You can make a
voice-signaled call from either a system phone or a standard phone. However,
if you try to make a voice-signaled call to a standard phone or an MLC-6, MDC
9000, or MDW 9000 phone, it will ring instead.)
NOTES:
1. The HFAI feature can be turned on or off only when your phone is idle.
Muting your voice while you are on a call only turns off the microphone for
the duration of the call.
2.
If HFAI is on and you are already on a call, you will not receive any
voice-signaled calls to your extension—they will ring instead.
3-6 Learning About Telephones