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Triggering SDP renegotiations

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Applies to: Skype for Business 2015

The BeginSdpRenegotiation(CallDialogContext, AsyncCallback, Object) method on the MediaProvider instance can be used for several purposes, such as when an application places a call on hold or retrieves it, or when media types are added or removed. If an incoming SDP renegotiation is in progress when this method is called, the requested SDP renegotiation will begin after the pending renegotiation is finished. The MediaProvider instance should expect the BeginGetOffer(OfferAnswerContext, Collection<SdpContentDescription>, AsyncCallback, Object) method on the MediaProvider instance to be called after BeginSdpRenegotiation has started.

After the call to BeginSdpRenegotiation, the call flow is similar to the call flow of an outgoing call with normal offer/answer. For more information, see Negotiating declined offers.