Documentation: http://mobile.vianett.com/files/javadoc/

  import no.vianett.sms.SmsEventListener;
  import no.vianett.sms.Sms;
  import no.vianett.sms.SmsEvent;
  import no.vianett.sms.component.SmsTransceiver;
  import no.vianett.sms.log.SmsFileLogger;
  import no.vianett.sms.event.SmsReceivedEvent;
  import no.vianett.sms.event.SmsDeliveredEvent;
  import no.vianett.sms.event.SmsSendingFailedEvent;
  import no.vianett.sms.event.SmsDeliveryFailedEvent;
  import java.io.FileNotFoundException;

  public class SmsEcho implements SmsEventListener
  {
    private SmsTransceiver transceiver = null;
    private Object link = null; // Just to keep this object alive.
    private int counter = 0;

    public SmsEcho()
    {
      this.link = this; // Keeps this object alive.
      this.transceiver = SmsTransceiver.getInstance(); // Get the transceiver object.

      // Initialize transceiver.
      String smsHost = "cpa.vianett.no";
      String smsPort = "31337";
      String smsUsername = "username";
      String smsPassword = "password";
      try{ this.transceiver.initialize( smsHost, Integer.parseInt( smsPort ), smsUsername, smsPassword, new SmsFileLogger( "C:\\sms.log" ) ); }
      catch( FileNotFoundException fnfe ){ System.out.println( this + fnfe.getMessage() ); }

      this.transceiver.addSmsEventListener( this ); // Registrer this class as a listener for SMS events.
    }

    // Just make a new instance of this class.
    public static void main( String[] args ){ new SmsEcho(); }

   /**
    * Listener.
    *
    * @param event a <code>no.vianett.sms.SmsEvent</code>
    */
    public void eventHappened( SmsEvent event )
    {
      if( event instanceof SmsReceivedEvent )
      {
        System.out.println( "Sms received." );
        System.out.println( "Refno : " + event.getReferenceId() );
        System.out.println( "Event generated by : " + event.getSource().getClass() );

        Sms in = ( ( SmsReceivedEvent ) event ).getSms();
        System.out.println( "Sms : " + in ); // Write content of received SMS.

        // Send echo back
        Sms out = new Sms();
        out.setId( ++this.counter );
        out.setSender( "1963" ); // Set the sender number.
        out.setMessage( "Echo: " + in.getMessage() );
        out.setOperator( in.getOperator() ); // Use the same operator.
        out.setRecipient( in.getRecipient() );
        this.transceiver.send( out );
      }
      else if( event instanceof SmsDeliveredEvent )
      {
        System.out.println( "Sms delivered." );
        System.out.println( "Refno : " + event.getReferenceId() );
        System.out.println( "Event generated by : " + event.getSource().getClass() );
      }
      else if( event instanceof SmsSendingFailedEvent )
      {
        System.out.println( "Sms sending failed." );
        System.out.println( "Refno : " + event.getReferenceId() );
        System.out.println( "Return code : " + ( ( SmsSendingFailedEvent ) event ).getReturnCode() );
        System.out.println( "Event generated by : " + event.getSource().getClass() );
      }
      else if( event instanceof SmsDeliveryFailedEvent )
      {
        System.out.println( "Sms delivery failed." );
        System.out.println( "Refno : " + event.getReferenceId() );
        System.out.println( "Error code : " + ( ( SmsDeliveryFailedEvent ) event ).getErrorCode() );
        System.out.println( "Event generated by : " + event.getSource().getClass() );
      }
    }

  }