call.h

#ifndef _CALL_H_
#define _CALL_H_

#include "SIM900.h"

class CallGSM {
public:
     // finds out the status of call
     byte CallStatus(void);
     byte CallStatusWithAuth(char *phone_number,
                             byte first_authorized_pos, byte last_authorized_pos);
     // picks up an incoming call
     void PickUp(void);
     // hangs up an incomming call
     void HangUp(void);
     // calls the specific number
     void Call(char *number_string);
     // makes a call to the number stored at the specified SIM position
     void Call(int sim_position);
     void SendDTMF(char *number_string, int time);

     void SetDTMF(int DTMF_status);
     char DetDTMF();

};

#endif