on_r2_signal 1929 mod_freetdm/mod_freetdm.c static FIO_SIGNAL_CB_FUNCTION(on_r2_signal) on_r2_signal 3381 mod_freetdm/mod_freetdm.c if (ftdm_configure_span(span, "r2", on_r2_signal, on_r2_signal 8 src/testr2.c static FIO_SIGNAL_CB_FUNCTION(on_r2_signal) on_r2_signal 49 src/testr2.c if (ftdm_configure_span(span, "r2", on_r2_signal,