FTDM_ENOSYS       758 src/ftdm_io.c  		status = FTDM_ENOSYS;
FTDM_ENOSYS      2413 src/ftdm_io.c  		status = FTDM_ENOSYS;
FTDM_ENOSYS      5227 src/ftdm_io.c  		status = FTDM_ENOSYS;