LanScape VOIP Media Engine
SipSubscriptionTimeOut
The SipSubscriptionTimeOut 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 to inform the application that the telephony device offering the event has not responded in the specified amount of time. The application must assume the event subscription is not valid.
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.