fio_configure_span_signaling_t 744 src/include/freetdm.h typedef ftdm_status_t (*fio_configure_span_signaling_t) FIO_CONFIGURE_SPAN_SIGNALING_ARGS ; fio_configure_span_signaling_t 314 src/include/private/ftdm_types.h fio_configure_span_signaling_t configure_span_signaling;