Using Multiple SIP Stacks (Windows CE 5.0)
The SIP stack in the RTC Client API Catalog item is built to provide functionality such as presence and instant messaging when used with Microsoft Live Communication Server (LCS). However, there are other kinds of functionality, like video sessions, that the RTC Client API SIP stack doesn't currently provide.
One way to gain additional functionality without losing that provided by the RTC Client API SIP stack is to use more than one SIP stack at a time.
You can do this in a number of different ways, depending on the results you want. For example, you might choose to use a non-RTC Client API SIP stack for signaling so that you can support video conferencing or other SIP features not supported by the SIP stack provided by the RTC Client API. General implementation details of this approach are explained in more detail above in Customizing Non-UI IP Phone Functionality.
For details about support for video conferencing, see Supporting Video Conferencing.
See Also
Common IP Phone Customization Tasks | How to Develop an IP Phone | Telephony User Interface (TUI) | VoIP Application Interface Layer (VAIL) | Real-time Communications (RTC) Client API
Send Feedback on this topic to the authors