On this tab, you can specify hang up options for the case when the call is not answered. By default, the waiting time (for the call is answered) is determined by the properties of the phone network (usually 60 seconds).
Hang Up (no answer) Settings
Do not hang up
Do not hang up until the call is answered. It is advisable not to use this option and to limit the waiting time, as some providers allow a false indication of the answer, and probability of such indications strongly increases after long time of waiting.
Hang up after ... sec (fixed time of waiting)
Use this option to hang up after fixed time delay if the call not answered. Specify the fixed time delay before hanging up (in seconds). The maximum delay is 99 sec.
Hang up randomly between ... and ... sec
Use this option to hang up after random time delay if the call not answered. Specify the lower and upper bounds.