AASTRA 4422 IP Office (SIP) for MX-ONE User Guide - Manual (Page 34)

Outgoing Calls
Dialog 4422 IP Office 34
Handsfree
With the handset on hook: z
Dial the number.
Press.
You are connected via the loudspeaker and microphone.
Press to terminate a handsfree call.
SOS calls (Emergency calls)
When your phone is logged on z
Dial the SOS number.
Press.
Individual External Line
To make a call on a specific external line: u
Lift the handset. *0* z #
Dial, enter the Individual External Line number and press.
z
Dial the digit or digits to get an external line and the external
number.