SIP Softphone

This Softphone required the following set of features using C++/Java to integrate with my Brosix Instant Messenger : Features: VPN Support Customized Logo and skin interfaces Call timer Last Number Redial , Missed Call Local signaling (Dial tone, busy, ring back, etc.) for user comfort Touch Tone. Support different codec,such as gsm,G.711mu,G.711a,G.729 etc 3rd Party web based real-time prepaid billing solution available with customer care and reporting system. Address Book , Account History Micro Phone Volume Control Speaker Volume Control Small application Work with any full-duplex sound card UPNP NAT/Firewall support, stable SIP RTP ports Auto-configuration of settings for easy deployment Configuration Wizard Optional : Display Balance Music on hold Display Credit account time countdown SIP Server will be embedded in the softphone. Users cannot change SIP Server IP, Unlimited simultaneous call sessions and MUST embedded in an application or hosted on a website. If you have exiting project/sourcecode, it is okay but it must nice & friendly GUI. Please let me know if you want to know anything more.