CONFIG_ISDN_TTY_FAX 351 include/linux/isdn.h #ifdef CONFIG_ISDN_TTY_FAX CONFIG_ISDN_TTY_FAX 238 include/linux/isdnif.h #ifdef CONFIG_ISDN_TTY_FAX CONFIG_ISDN_TTY_FAX 381 include/linux/isdnif.h #ifdef CONFIG_ISDN_TTY_FAX