SipSubscriptionSuccess

The SipSubscriptionSuccess event is sent to an application when the application is making an attempt to subscribe to an event offered by another telephony device. This event is sent to the application when the event type has been accepted by the far end device and the subscription is active. The far end device will at some future time contact your application's media engine when the subscribed event occurs. The media engine will then contact the application using the SipNotifyReceived event (events from other devices are received by the application as notify request events).

When an application receives this event, the media engine event callback procedure SIPCALLBACKPROC will have a non zero value assigned for the pEventData parameter. This value is a pointer to the SUBSCRIBE_RESULTS structure which contains additional information for this event.