Parameter set-up:
Dial In Time: enter the dial in time duration for you door phone
(ranging from 30-120 sec.) for example, if you set the dial in time
duration is 60 second in your door phone, then the door phone will
hang up the incoming call automatically if the call is not answered
by the door phone in 60 seconds. 60 seconds is the dial in time
duration by default.
Dial Out Time: enter the dial in time duration for your door phone
(ranging from 5-120 sec.) for example, if you set the dial out time
duration is 60 seconds in your door phone, then the door phone
will hang out the call it dialed out automatically if the call is not
answered by the device being called to.
9.4.3. Audio& Video Codec Configuration for SIP