Value

Type: SystemEventHandlerCallFailureEventArgs

This event is sent when the call has failed either as a result of a local error or as a result of an error received from the network (e.g., when a call attempt to an unreachable address is made). It should be noted that a call that has failed is not automatically ended by the signaling engine. The application must still call End to end the failed call. This is done so that a UI implementation that is line-oriented can keep the line appearance occupied while the call is in failed state.