SipSubscriptionReceived

The SipSubscriptionReceived event is sent to an application when some other telephony device is asking to subscribe to a particular event that is offered by the application. Applications can respond to this event either by informing the media engine that the application supports the event or the event subscription is not acceptable. This event must be handled by applications that offer events to other devices.

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_REQUEST structure which contains additional information for this event.