of the asynchronous call - see
Finished by calling ICDSV3RequestHandling.ReleaseRequest)
_BACNET_ESCALATOR_OPERATION_DIRECTION (Enum) IEC_BACNET_ETHER_EVENT_CALL [...] _BACNET_HOST_N_PORT_TYPE (Enum) IEC_BACNET_IP_EVENT_CALL [...] _BACNET_KEY_ID_NUMBER (Enum) IEC_BACNET_LANDING_CALL