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public SiemensSMSModem(String port)
    {
      this.sp.PortName=port;
      
      if(this.sp.IsOpen)
        this.sp.Close();
      
      this.sp.BaudRate=SiemensSMSModem.BAUD_RATE;
      this.sp.DataBits=SiemensSMSModem.DATA_BITS;
      this.sp.StopBits=SiemensSMSModem.STOP_BITS;
      this.sp.Parity=SiemensSMSModem.PARITY;
      this.sp.Handshake=SiemensSMSModem.HANDSHAKE;
      this.sp.ReadTimeout=SiemensSMSModem.READ_TIMEOUT;
      this.sp.WriteTimeout=SiemensSMSModem.WRITE_TIMEOUT;  
      
      this.sp.Open();
    }					

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public override bool isItMe(){      
        this.sp.DataReceived+=this.onDataReceived;
        //this.sendAndWait("ATE0\r");
        this.sendAndWait("ATI\r");      
        
        char[] splitter=new char[1];
        
        Regex r=new Regex("SIEMENS");
        splitter[0]='\r';
        
        if(r.IsMatch(this.bufferString)){
          String[] buff=bufferString.Split(splitter);
          this.name=buff[1];
          this.type=buff[2];
          this.version=buff[3];
          this.sendAndWait("AT+CPMS=MT\r");          
          //this.pollingThread=new Thread(this.pollText);
          //this.pollingThread.Start();
          //this.pollText();
          return true;
        }
        else if(this.errorPattern.IsMatch(bufferString))
          throw new RosTesterException("Fehler");
        else
          return false;
      
    }					

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this.bufferString=this.sp.ReadExisting();