Sends a provisional reliable response on the call; will also create an early dialog.

Namespace:  Microsoft.Rtc.Collaboration.AudioVideo
Assembly:  Microsoft.Rtc.Collaboration(in Microsoft.Rtc.Collaboration.dll)

Syntax

Visual Basic (Declaration) 
Public 
Function 
BeginEstablishEarlyMedia ( _
	
responseCode 
As 
Integer, _
	
options 
As 

CallProvisionalResponseOptions, _
	
userCallback 
As 
AsyncCallback, _
	
state 
As 
Object _
) 
As 
IAsyncResult
C# 
public 
IAsyncResult 
BeginEstablishEarlyMedia(
	
int 
responseCode,
	

CallProvisionalResponseOptions 
options,
	
AsyncCallback 
userCallback,
	
Object 
state
)
Visual C++ 
public:
IAsyncResult^ 
BeginEstablishEarlyMedia(
	
int 
responseCode, 
	

CallProvisionalResponseOptions^ 
options, 
	
AsyncCallback^ 
userCallback, 
	
Object^ 
state
)
JavaScript 
function 
beginEstablishEarlyMedia(
responseCode, 
options, 
userCallback, 
state);

Parameters

responseCode
Type: Int32
Response code.
options
Type: Microsoft.Rtc.Collaboration . . :: . CallProvisionalResponseOptions
Options parameters to be sent on the provisional response. Can be null.
userCallback
Type: AsyncCallback
The method to be called when the asynchronous operation is completed.
state
Type: Object
A user-provided object that distinguishes this particular asynchronous operation from other asynchronous operations.

Return Value

An IAsyncResult that references the asynchronous operation.

Exceptions

Exception Condition
ArgumentNullException Thrown when the optionsparameter contains null values.
ArgumentException Thrown when the optionsparameter contains invalid signaling headers.
InvalidOperationException Thrown when the call is not in the incoming state, the remote side does not support reliable priovisional response or when early media is already being negotiated.

See Also