TANDBERG 550MXP - Manual (Page 115)

Administrator Settings
105
4.1.3 Auto Answer
The auto answer setting decides whether an incoming call is put through automatically or
manually.
On The system will automatically answer all incoming calls.
On+Mic
Off The system will automatically answer all incoming calls and switch the
microphone off when the call is connected. Press Mic Off to switch the
microphone on.
Off You must manually answer all incoming calls by pressing OK or the Call key.