If you want to send ring tone (or picture or operator logo), you have to prepend the actual data with binary User Data Header (these are specified in GSM 03.40, see www.etsi.org). The UDH you have to use basically contains source port and destination port where the phone expects certain type of data. For different data types there can be additional information as well. For example fo Nokia phones the destination port for ring tones is 0x1581. See the example below. (IE is information element)

Note that UDHs aren't supported directly in the toolkit at the moment. It means that there is nothing like class UDH which would simplify creation of the UDHs and automatic concatenation with the message content. So you have to create the binary content representing the UDH "manually".

  // let's assume that the session is already created
  // and the application is already bound to the smsc

  // we'll send the data as submit_sm PDU
  SubmitSM request = new SubmitSM(); 

  // set the source and destination phone numbers
  request.setSourceAddr("353871234567"); 
  request.setDestAddr("353867654321"); 

  // create a buffer for the message payload
  ByteBuffer message = new ByteBuffer(); 

  // UDH is needed to tell the mobile phone details 
  // how to deliver the data in the message payload
  // first goes UDH length -- this UDH will have 6 bytes 
  message.appendByte((byte)6); 

  // then goes IE -- information element
  // IE Identifier -- 5 means that the following will
  // be destination and originator port numbers
  message.appendByte((byte)5); 

  // IE Data Length -- the length of the IE
  // two ports per two bytes = 4 
  message.appendByte((byte)4); 

  // the destination port -- port where ringing tone is received 
  // on Nokia phones 
  message.appendShort((short)0x1581); 

  // originator port (unused in fact)
  message.appendShort((short)0x0000); 

  // load the ringtone data into a buffer.
  // note that we expect that the ringtone data are already
  // in the Nokia's format specified in the Smart Messaging Specs.
  // Nokia PC Composer can save tones in this format.
  // my ringtone file is called test.ott
  ByteBuffer toneData = loadByteBuffer("test.ott"); 

  // simply append the ring tone data to the message payload
  message.appendBuffer(toneData); 

  // we send all the data as a message payload
  request.setMessagePayload(message); 

  // you must set the esme class to indicate that the message
  // contains UDH
  request.setEsmClass((byte)(Data.SM_UDH_GSM)); 

  // the coding is GSM specific
  request.setDataCoding((byte)0x0f5);

  // finally submit the mesasge
  response = session.submit(request); 

  // for your convenience here is the code for loading
  // of the data from a file
  public ByteBuffer loadByteBuffer(String fileName) 
  throws FileNotFoundException,IOException 
  { 
      FileInputStream is = new FileInputStream(fileName); 
      byte[] data = new byte[is.available()]; 
      is.read(data); 
      is.close(); 
      return new ByteBuffer(data); 
  } 
  

Well, and that's it.