AT&T MERLIN LEGEND System Reference Manual page 250

Features
Do Not Disturb
Hold
Paging
Park
Privacy
Queued Call Console
Ringing/Idle
Line Preference
Ringing Options
Transfer
If the MLX telephone user with Headset Auto Answer uses Do Not Disturb, any
calls that override Do Not Disturb (such as Barge-In calls and Callback calls)
are automatically answered.
Headset Auto Answer is automatically deactivated when an MLX telephone user
puts a call on hold and must be reactivated manually.
A user with a headset hears group speakerphone Paging over the
speakerphone.
If a call is parked, another call can be automatically answered by using Headset
Auto Answer.
Privacy should be programmed when headset users with Headset Auto Answer
have Shared System Access buttons or share one or more personal lines.
Privacy keeps the users from competing for the same call. When two or more
users answer the same call on a Shared System Access or Personal Line button,
the red and green LEDs next to the button go on, but only one person has a talk
path with the caller.
Headset Auto Answer, Headset/Handset Mute, and Headset Status are fixed
features on buttons on a QCC. Headset Hang Up cannot be programmed on a
QCC.
The function of disconnecting calls served by the Headset Hang Up feature is
replaced with the Release, Forced Release, Camp-On, and Automatic Release
features via DSS buttons on the QCC.
Ringing Line Preference does not operate if Headset Auto Answer is disabled
while the MLX telephone is in the headset operation mode. To answer a call, the
user must press the button next to the ringing call.
When the telephone or console is in the headset operation mode, Idle Line
Preference does not operate, and the user must manually select a line button
before making an inside or outside call.
Headset Auto Answer does not automatically answer calls ringing on buttons
programmed for no ring on an MLX telephone; the user must manually select the
button to answer the call. When Abbreviated Ring is enabled, the user hears the
abbreviated ring if another call rings while the user is on a call.
When an MLX telephone user (excluding a QCC system operator) transfers a
call, Headset Auto Answer is deactivated and must be reactivated manually
unless the user releases the call by using the Headset Hang Up button.
Headset Options 2-201