AT&T MERLIN LEGEND Release 3.1 System Programming Manual page 780

General Feature Use and Telephone Programming
Dedicated Feature Buttons
All multiline telephones have a group of dedicated feature buttons that are
programmed and labeled at the factory. The functions of these buttons, which
include Conference, Transfer, and Speaker, cannot be changed. Press the
button for the feature you want to use.
Programmed Buttons
Any unlabeled line button on multiline telephones can be programmed with a
feature for one-touch activation. See Tables D–1 through D–4 for more
information on programming features onto line buttons.
Some features, such as Auto Dial, must be programmed onto line buttons in
order to use them. Other features, such as Privacy, are best used if programmed
onto line buttons—the LED next to the line button provides visual indication that
the feature is in use. The following features must be programmed onto line
buttons:
Auto Answer All
Auto Answer Headset
Auto Dial
Barge-In
Coverage
Group Coverage
Primary Coverage
Secondary Coverage
Coverage Off
Do Not Disturb
Extension Status—Agent Login/Logout
Feature Button (analog multiline telephones only)
Headset/Handset Mute
Headset Status
Headset Hang Up
Notify
Posted Message (available from display on MLX display telephones)
Saved Number Dial
Signaling
D–2
System Programming