FTDM_CHANNEL_USE_TX_GAIN 3200 src/ftdm_io.c  				ftdm_clear_flag(ftdmchan, FTDM_CHANNEL_USE_TX_GAIN);
FTDM_CHANNEL_USE_TX_GAIN 3202 src/ftdm_io.c  				ftdm_set_flag(ftdmchan, FTDM_CHANNEL_USE_TX_GAIN);
FTDM_CHANNEL_USE_TX_GAIN 3963 src/ftdm_io.c  	if (ftdm_test_flag(ftdmchan, FTDM_CHANNEL_USE_TX_GAIN)