LanScape VOIP Media Engine
SipOutgoingCallInitializing
The SipOutgoingCallInitializing event is sent to an application when an outgoing phone call is in the earliest stages of call setup. The primary purpose of this event is to allow the application to associate call instance data with the outgoing phone call.
If an application needs to associate call instance data with the outgoing phone call, it can call the SetCallInstanceData API procedure when processing this event.
The call endpoint that will receive the call can then access the call instance data by calling the GetCallInstanceDataLength and GetCallInstanceData API procedures when it receives the SipIncomingCallStart event.