Android Sip to GSM application

- Receive call authenticated by IP, user/pass or no authentication.

- Make calls with or without authentication

- Forward DTMF digits using RFC2833 or inband

- Use codec G711 and GSM

- Be able to use codec G729

- Receive through GSM one 1 simultaneous call and rout it to a predefined SIP client

- Be able to store a CSV with all calls made

Skills required:

Android, VoIP

An standard SIP client running on a separate android phone will have to connect to the SIP server that was developed on the other android phone via wifi and an incoming and outgoing call would have to be demonstrated.