- extern void GSM_Init(void);
- extern void ReadGSMReturn(char *p);
- extern void GPRS_Con(char *p);
- extern void GSM_CUT(void);
- extern unsigned char GSMState;
- extern char GSMStart_Flag;
- extern char GSM_Init_Flag_Time;
- extern char GSM_Init_Flag;
- extern const char GSM;
- extern const char GPRS;