int ModemInit(char UART0_TX_BUF[]); 
int SetPhoneNum(char UART0_TX_BUF[],char nPhone,char PhoneNumber[]);
int PackData(char UART0_TX_BUF[],char pBuf[],int nSendLen);
int DataToCommand(char UART0_TX_BUF[]);
int SetATH0(char UART0_TX_BUF[]);
void Delay_us(unsigned long nValue);
void Delay_ms(unsigned long nValue);