Enables or disables the IP phone to
automatically answer an incoming intercom
call while there is already an active call on
the IP phone.
If set to 0 (Disabled), the IP phone handles an
incoming intercom call like a waiting call
while there is already an active call on the IP
phone.
If set to 1 (Enabled), the IP phone
automatically answers the intercom call while
there is already an active call on the IP phone
and put the active call on hold.
Enables and disables the IP phone to map the
keywords in the Alert-info header to the
specified Bellcore ring tones.