sorry if this is trivial to you, but I’ve been searching for a while and couldn’t find a definite answer. Is it possible with the Asterisk software package to use a RasPi at home with dyndns such that
- it serves as a registration server (i.e. one does not need any extra service such as linphone.org)
- it allows encrypted voice (and video) calls from one Asterisk-RasPi to another one located elsewhere on the internet
- one can connect some sort of a headset or even a standard phone to the RasPi that rings if a call is coming in, and that one can use to talk after the RasPi has decrypted the incoming audio stream and before it has encrypted the outgoing audio stream?
Any helpful advice on these questions might make me happy, so thanks for taking the time!