void BeginCall(
	ISIPCall caller,
	SIPAddress from,
	MediaDescription sessionDescription,
	List<SIPHeader> additionalHeaders
)

Sub BeginCall ( _
	caller As ISIPCall, _
	from As SIPAddress, _
	sessionDescription As MediaDescription, _
	additionalHeaders As List(Of SIPHeader) _
)

void BeginCall(
	ISIPCall^ caller, 
	SIPAddress^ from, 
	MediaDescription^ sessionDescription, 
	List<SIPHeader^>^ additionalHeaders
)