I am developing a SIP based application. In general if one registered user of asterisk calls to the user who is not registered, in this scenario call takes some minutes to hangup and user needs to wait sometime to make another call.
So what I want to do is, I don't want to allow a caller to call that peer which is unregistered. So is there any parameter to set in asterisk peer settings to do this task.
I am using sipdroid for reference.