RTP streaming and Cisco IP phones problem

Question

Hello,
I'm trying to write an application that should dial some numbers and play the voice message from the file into the phone line using Cisco JTAPI and Java Media Framework.
I've found some samples, that seems useful for me, but unfortunately they does not work. There are no any errors and no exceptions, I have no idea what to do.
Small brief: I make a call from one Cisco IP phone (7960) to another using Cisco JTAPI, then I catch the CiscoRTPInputStartedEv event, get the IP and port of the IP Phone and call the RTPStreamer class constuctor with them. It gives no any errors or exceptions (just a message shown below), but there is only silence in the phone line. Message:
Should b streamin'...
Encoding ok?: true
streams is [Lcom.sun.media.multiplexer.RawBufferMux$RawBufferSourceStream;@53d : 1
sink: setOutputLocator rtp://192.168.1.22:20794/audio
Please see the RTFStreamer class code below.
I set the packet size to 160 as reccomended for Cisco IP phones, I use the greeting.wav from Cisco example that properties are 8Khz 8bit mono, but it still doesn't work.
Could you help me? Thank you for any advice!
import java.io.* ;
import java.util.* ;
import java.net.* ;
import javax.media.* ;
import javax.media.control.* ;
import javax.media.format.* ;
import javax.media.protocol.* ;
import stream.*;
public class RtpStreamer
     public static int PlayCounter = 0;
     private RtpStreamer()
          // not supported
     public RtpStreamer(String IP, String Port)
          PlayCounter++;
          new RtpStreamer("rtp://" + IP + ":" + Port + "/");
     public RtpStreamer(String CurrentMediaUrl)
          PlayCounter++;
     System.out.println("Should b streamin'...");
     // Create a Processor for the selected file. Exit if the
     // Processor cannot be created.
     Processor processor = null;
     StateHelper sh = null;
     try
               String mediaUrl = "file:\\C:\\greetings.wav";
     processor = Manager.createProcessor( new MediaLocator(mediaUrl));
     sh = new StateHelper(processor);
     catch (IOException e)
     System.out.println("Exception occured (1a): " + e);
     catch (NoProcessorException e)
     System.out.println("Exception occured (1b): " + e);
     // for loggin purpose
     //sh.setContext( getServletContext() );
     // configure the processor
     if (!sh.configure(10000))
     System.out.println("Configuration failed!!");
     // Block until the Processor has been configured
     TrackControl track[] = processor.getTrackControls();
     boolean encodingOk = false;
     // Go through the tracks and try to program one of them to
     // output ulaw data.
     for (int i = 0; i < track.length; i++)
     if (!encodingOk && track[i] instanceof FormatControl)
     if (((FormatControl)track).setFormat( new AudioFormat(AudioFormat.ULAW_RTP,8000,8,1)) == null)
     track[i].setEnabled(false);
     else
     encodingOk = true;
     else
     // we could not set this track to ulaw, so disable it
     track[i].setEnabled(false);
               // set packet size to 160
               try
                    Codec codec[] = new Codec[3];
                    codec[0] = new com.ibm.media.codec.audio.rc.RCModule();
                    codec[1] = new com.ibm.media.codec.audio.ulaw.JavaEncoder();
                    codec[2] = new com.sun.media.codec.audio.ulaw.Packetizer();
                    ((com.sun.media.codec.audio.ulaw.Packetizer)codec[2]).setPacketSize(160);
                    ((TrackControl)track[i]).setCodecChain(codec);
               catch (Exception e)
                    System.out.println("Error setting packet size in 160: " + e + " in " + e.getMessage());
     System.out.println("Encoding ok?: " + encodingOk );
     // At this point, we have determined where we can send out
     // ulaw data or not.
     // realize the processor
     if (encodingOk)
     if (!sh.realize(10000))
     System.out.println("Realization failed!!");
     // block until realized.
     // get the output datasource of the processor and exit
     // if we fail
     DataSource ds = null;
     try
     ds = processor.getDataOutput();
     catch (NotRealizedError e)
     System.out.println("Exception occured(2): "+e);
     // hand this datasource to manager for creating an RTP
     // datasink.
     // our RTP datasink will multicast the audio
     try
     //String mediaUrl= "rtp://192.168.1.12:20002/audio/1"; // it works without errors
                    String mediaUrl= CurrentMediaUrl + "audio";
     MediaLocator m = new MediaLocator(mediaUrl);
     DataSink d = Manager.createDataSink(ds, m);
     d.open();
     d.start();
     catch (Exception e)
     System.out.println("Exception occured(3): "+e);

Answer 1

BTW is there any solution to figure out if the RTP application makes any network activity or not?