AT&T AT3111-2 - Manual (Page 18)

Telephone operation
14
NOTE: If a headset is
plugged in to the
handset, the handset
speakerphone will be
disabled.
Hands-free speakerphone calls
To answer a call, press
. To make a call, press
, then dial a number. During a call, press to
alternate between hands-free speakerphone and
normal handset use. Press
OFF/
CLEAR
to hang up.
Temporary ring silencing
Press
OFF/
CLEAR
while the telephone is ringing
to silence the ringer temporarily. This will silence
the ringer without disconnecting the call. You can
answer the call. The next incoming call will ring
normally.
Handset operation