1. VoIP Voice over Internet Protocol H.323 SIP RTP SDP IAX SRTP Skype And a lot more…

2. VoIP Voice over Internet Protocol VoIP Server PSTN Figure 2. The VoIP architecture.

3. Application Asterisk & WebRTC

4. Asterisk Asterisk is a flexible and extensible suite of integrated telecommunications software.

5. Asterisk Asterisk designed to support many telephony technologies It powers IP PBX systems, VoIP gateways, conference servers The Asterisk application runs under the Linux operating system

6. Asterisk

7. WebRTC Web Real Time Communication

8. WebRTC WebRTC is a open project that enables web browsers with Real-Time Communications capabilities via simple Javascript APIs.

9. WebRTC Supported Browsers

10. WebRTC CU-RTC-Web

11. WebRTC Customizable, Ubiquitous Real Time Communication over the Web

12. WebRTC MediaStream : get access to data streams, such as from the user's camera and microphone. RTCPeerConnection : audio or video calling, with facilities for encryption and bandwidth management. RTCDataChannel : peer-to-peer communication of generic data.

13. WebRTC The offer/answer architecture is called JSEP JavaScript Session Establishment Protocol Figure 3. The JSEP architecture.

14. System Design Asterisk PSTN WebRTC Clients SIP Clients

15. System Design

17. Conclusion This study intend to build a system that merge two telephony technologies (WebRTC and SIP) into a complete one. When the system online, we are able to communication with other SIP clients in real time.

18. References [1] Clayton, Bradley, Barry Irwin, and Alfredo Terzoli. "Integrating Secure RTP into the Open Source VoIP PBX Asterisk." ISSA. 2006. [2] Goode, Bur. "Voice over internet protocol (VoIP)." Proceedings of the IEEE90.9 (2002): 1495-1517.

19. Thanks for your patient.