AASTRA 4425 IP Vision (SIP) for MX-ONE User Guide - Manual (Page 33)

Incoming Calls
Dialog 4425 IP Vision 34
Incoming Calls
Answer calls
A ring signal and a flashing lamp indicate an incoming call.
Note: If the feature Parallel Ringing is activated, the call will
ring on more than one phone, see section “ Parallel Ringing ”
on page 36 .
Line/Hold
You will receive calls on Line/Hold. u
Lift the handset.
Handsfree Ц Ф
Line/Hold Press the flashing Line/Hold key,
You are connected to the caller via the loudspeaker and the
microphone. í
Press to terminate a handsfree call.