C# DTMF IVR PROGRAM

Ozeki VoIP SIP .Net SDK for C# DTMF IVR system development to add automatic voice response to your telecommunication system. The sample program allows the caller to navigate in a voice menu with the help of the keypad of the telephone to reach the target menu. The sample program registers/unregisters to the PBX, handles calls events, connects PBX and the dialed party, conciliates audio codecs of the participants, implements voice communication