utily.h

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#define DTMF_1 0x01
#define DTMF_2 0x02
#define DTMF_3 0x03
#define DTMF_4 0x04
#define DTMF_5 0x05
#define DTMF_6 0x06
#define DTMF_7 0x07
#define DTMF_8 0x08
#define DTMF_9 0x09
#define DTMF_0 0x0A
#define DTMF_E 0x0B //*
#define DTMF_F 0x0C //#
#define DTMF_A 0x0D
#define DTMF_B 0x0E
#define DTMF_C 0x0F
#define DTMF_D 0x00

#define MASK_HANGUP 0x80
#define MASK_DTMF	0x10

#define GET_PHONE	0x80
#define RELEASE_PHONE 0x00

#define RING_ON		0xC0
#define RING_OFF	0x80