Sip phone with FAX/IVR detect

Feel free to use any SIP stack that can take care of fax and IVR detection ========================================================================== [using pjsip: svn checkout [login to view URL] opensoftphone] 1. The sip phone should be able to call numbers (from a database or a file) and if [fax, ivr] then skip to next call else transfer the call to an internal SIP phone 2. The UI should allow for the following functions: - mute button - skip to next call button - terminate call - put call on hold - pause subsequent calls Display - number currently in call state, call duration field that updates itself 3. The softphone above uses C/Java/SWIG; please feel free to use any toolkit that allows you to handle the requirements.