Public Function BeginSendReliableProvisionalResponse ( _
		responseCode As Integer, _
		signalingHeaders As IEnumerable(Of SignalingHeader), _
		needEarlyMediaSupport As Boolean, _
		userCallback As AsyncCallback, _
		state As Object _
) As IAsyncResult

public IAsyncResult BeginSendReliableProvisionalResponse (
		int responseCode,
		IEnumerable<SignalingHeader> signalingHeaders,
		bool needEarlyMediaSupport,
		AsyncCallback userCallback,
		Object state
)

Parameters

responseCode

The provisonal response code in the range 101-199.

signalingHeaders

The custom signaling headers to add the response.

needEarlyMediaSupport

The flag indicating whether the provisional response needs to send the media description.

userCallback

The callback to be invoked when the SendProvisionalResponse operation has completed.

state

The state to be passed back to the callback.

Return Value

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.

Development Platforms

Target Platforms