DTMF_TONE_MASK 1510 drivers/isdn/hardware/mISDN/mISDNisar.c if ((hh->id == 0) && ((*val & ~DTMF_TONE_MASK) == DTMF_TONE_MASK 1513 drivers/isdn/hardware/mISDN/mISDNisar.c char tt = *val & DTMF_TONE_MASK;