Sends a reliable provisional response with option to send answer for early media. Namespace: Microsoft.Rtc.Signaling
Assembly: Microsoft.Rtc.Collaboration (in microsoft.rtc.collaboration.dll)



Exception type Condition

Thrown when the response code is not a provisional response code.


Thrown if the sesison is not in incoming state.


If the inviter supports 100rel and the local policy is not unsupported, this method will wait for the PRACK. Otherwise, this method will not require 100rel. Any application that supports 100rel is recommended to use this method for sending provisional response. SendProvisional method can be used only when the application knows for sure that the remote does not require 100rel.

Thread Safety

All public static (Shared in Visual Basic) members of this type are thread-safe. Instance members are not guaranteed to be thread-safe.


Development Platforms

Windows XP Professional with Service Pack 2 (SP2), Windows Server 2003, Windows Vista Ultimate Edition, Windows Vista Business Edition, Windows Vista Enterprise Edition

Target Platforms

See Also