ftdm_channel_get_availability 1527 src/ftdm_io.c FT_DECLARE(int) ftdm_channel_get_availability(ftdm_channel_t *ftdmchan) ftdm_channel_get_availability 832 src/include/freetdm.h FT_DECLARE(int) ftdm_channel_get_availability(ftdm_channel_t *ftdmchan);