5
Headset
You can use this telephone
hands-free when you install
any industry standard 2.5 mm
headset (purchased separately).
For best results use an AT&T
2.5 mm headset.
Plug the headset into the jack
located on the right side of
the handset (under the small
rubber flap). Do not force the
connection,but make sure the
plug fits securely.