#if !defined( _GPRS_H )
#define _GPRS_H

enum PPPGPRSState { POWERON=0, PPPINIT, ATE0, ATCGATT, ATCGATT_1,
		    ATCGDCONT, ATD99, PPPLINKUP, PPPPOLLING, PPPTERM };

// return 0 1:  PPPInit
// return 7:  SetupPPPLink
// return 8:  PPPLinkup
// return 9:  PPPTerm
// other( 2 3 4 5 6 ):  ATCmd
PPPGPRSState  PPP_Running( );

// clean current PPP session, and restart a new PPP session.
void PPP_Restart( );

#endif