Snom VoIP Phone - Manual (Page 21)

Basic Functions
21
Incoming Call
When your snom 220 is called, it rings and displays the following
screen.
Accepting a Call
Picking up the handset or pressing ENTER will accept the call. The
snom 220 is now in a call.
Press
/ for scrolling to the next / previous set of softkeys.
Key mapping:
, Hold / Resume call
Transfer call
, Handsfree mode on/off
Scroll forward to next softkey set
Scroll back to previous softkey set
Mutes / Unmutes the microphone
Changes the volume
See below for a further description.