AT&T MERLIN LEGEND MLX- 10D Operator's Manual page 85

Using Features
Notes:
Automatic call delivery cannot be activated during a call.
You must complete the call before pressing the Headset
Auto Answer button.
If you are using Headset Auto Answer and you share a line
with other operators, use Privacy to prevent other
operators from answering the same calls.
To delete Headset Status from a programmed line button,
you must first switch to the handset.
To Turn off the Headset
You can turn off the headset during a call by using
Headset/Handset Mute.
heard through the headset. Press again to resume
conversation.
Speaker. Press once to transfer the call from your headset
to the speakerphone. Press again to return the call to the
headset.
Note: If the call is disconnected while the speakerphone is in
use, automatic call delivery turns off. You must press Speaker
again to turn it on again.
4-22 Headset Features
Press once and you can't be