Real-time Communications Architecture

Windows CE includes the following protocol stacks: Session Initiation Protocol (SIP), Real-Time Transport Protocol (RTP), and PSTN/Internet (PINT) internetworking service. The Communications Service is implemented through the Real-time Communications (RTC) API located in the RTC module, and is common across all of these stacks and provides the ability to build applications that create sessions (SIP), use codecs to compress and decompress audio data through RTP, and communicate with PSTN phones (PINT). The Windows Messenger application uses the RTC API as one of its supported back ends.

The following illustration shows the relationships between the Communications Service components.

The following topics describe the supporting components and architectural concepts in more detail:

• SIP
• RTP/RTCP
• PINT
• Codecs
• Objects and Interfaces
• SIP Server
• Provisioning

 Last updated on Saturday, April 10, 2004

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