Aastra Dialog 4420 IP Basic User Manual page 20

Outgoing Calls
u
20
Monitoring
You can monitor the progress of an outgoing call.
z
With the handset on hook:
Dial the number.
Press
When the other party answers:
Lift the handset.
Press to terminate a monitor call.
SOS calls (Emergency calls)
Note: The number for SOS calls might vary between
z
countries.
Dial the SOS number.
Press
If this feature is enabled it is still possible to make an emergency
call even if the status lamp is lit. If a dialtone is heard it is possible to
make the call.
Dialog 4420 IP Basic