Looking for Sip Encryption Solution For Sip Pc2phone and SIP

Dears , We are looking to have Webdialer Flash based , Sip Softphone , with possible Encryption solution embeded So that can work from SIP Blocked areas . We also need To embed that Sip encrytpion algorithm with our other SIP applications , So we are looking for Skilled Developers who can Run with us For longer . Required features: 1. Based on SIP. 2. Should support Voice and SMS. 3. Codec G.723, G.729 with silence supresseion. 4. Balance inquiry, real time balance display. 5. DTMF support. 6. Traverse NAT/Firewall/Blocked network through Encryption (VPN or Tunneling or P2P...any) 7. SoftPhones to communicate with one encryption server for both media and signaling. 8. Encryption Server will decrypt the encrypted traffic and use SIP for signaling and RTP for Voice. 9. The whole system should work with standard softswitch. 10. Registration of softphone clients through the encryption server in the softswitch. More detail will be provided at start of contract Regards Forhan Fizan Telecom [login to view URL]