Cisco 7920 Phone Manual page 38

If you want to...
Receive
notification when a
busy or ringing
extension becomes
available
Place a call using a
billing or tracking
code
30
Then...
Call the number and press
CallBack while listening to the
busy tone or ring sound. Hang up.
When the extension becomes
available, your phone provides an
audio and visual alert. (The call
back to this number is not
automatic; you must place the
call.) To view the status of call
back notification, press CallBack
while the phone is idle. To cancel
call back notification, press
Cancel.
CallBack is a special feature that
your system administrator might
configure for your phone. Note
that CallBack fails if the other
party has call forwarding enabled.
Dial a number and enter a client
matter code (CMC) or a forced
authorization code (FAC) when
prompted by a distinctive tone.
Your system administrator will
tell you if you need to enter CMC
or FAC codes and can provide you
with detailed instructions.
78-16888-01