SIP (Windows CE 5.0)
Session Initiation Protocol (SIP) is a signaling protocol used for establishing sessions in an IP network. A session can be a simple two-way telephone call or a collaborative multimedia conference session.
SIP is a request-response protocol that closely resembles two other Internet protocols: HTTP and SMTP. Using SIP, telephony becomes another Web application and integrates easily into other Internet services.
The primary benefits of SIP are as follows:
- Ability to create and manage any type of session
- Ability to separate physical devices, such as telephones, from users, and the service-logic from centralized control
The abstraction of service from physical devices that SIP provides allows features such as presence (subscriptions and notifications) and mobility to be possible.
After SIP establishes a connection, the RTC Client API uses the Real-time Transport Protocol (RTP) to transfer media information, like voice. For more information about RTP, see RTP/RTCP.
SIP is described in Internet Engineering Task Force (IETF) RFC 3261. You can read this RFC at this Internet Engineering Task Force Web site.
See Also
Real-time Communications Concepts
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