Simple Sip application

Project Description:
Simple app using SIP for connect 2 users. Connection only between predefined numbers loaded from api server (2 numbers).
No integration with system. Only run app for call or receive call with auto answer. When app ends no connection possible.
Additional load list file from api server and user can select witch file select and send this info to api server.
Only desktop upload audio files from user.

- Users can only login to app or be redirected to online registration form.
- Platform is Apple Iphone, Apple Ipad, Wndows Phone and Desktop (windows/linux/mac-optional).
- Echo cancelation
- Work with asterix SIP server (our)
- Should be able to support STUN
- Connection over Wifi, 3G 2.5G local access
- Dial, hang up,
- Call mute
- Speaker phone
- send information about user activity to api
- multi-language support
- for error connection/other - log send to api server
- possibility to change sip settings from api - when connection problem
- Server settings delivering from api server
- for apple publication to the store is required
- for apple integration with apple inn app biling and redirecting information on bought to api server
- for Desktop - upload audio files from user to api server
- for Desktop - installer, uninstaller,
- for Windows Phone publication required
- can be gpl or similar licence
- Delivery of project to include source code and instruction to recompile, generate installers etc.
- Project to support bug fixes

We deliver:
- api server
- asterix server
- graphics, text

Please contact for additional information