PHONE_CID 594 include/linux/ixjuser.h #define IXJCTL_CID _IOR ('q', 0xD4, PHONE_CID *) PHONE_CID 596 include/linux/ixjuser.h #define IXJCTL_CIDCW _IOW ('q', 0xD9, PHONE_CID *) PHONE_CID 118 include/linux/telephony.h #define PHONE_RING_START _IOW ('q', 0x87, PHONE_CID *)