Snom 220 - Manual (Page 30)

Advanced Functions
30
By pressing the
key, call completion is activated and the phone
waits for the other party to return to idle.
Pressing “CANCEL”
doesn’t cancel the call completion procedure, but
allows you to make or receive calls in parallel.
When the other party becomes idle, the following window appears:
If you press the
key, the phone will dial the number again in order
to establish a connection to the other party.
On “no response” (CCNR)
When the phone signals “no response” to your call, activate call
completion by pressing the CC key.
The phone will now wait for the dial destination to become active again.
The user can make and receive calls in the meantime by pressing
“CANCEL”
and going to the idle screen.