code: byte[] toByteArray(ByteArrayOutputStream os)
  	{
  		os.write(channelid);
  		os.write(status);
  		if (endpt != null && crd != null) {
  			byte[] buf = endpt.toByteArray();
  			os.write(buf, 0, buf.length);
  			buf = crd.toByteArray();
  			os.write(buf, 0, buf.length);
  		}
  		return os.toByteArray();
  	}
docs: /* (non-Javadoc)
  @see tuwien.auto.calimero.knxnetip.servicetype.ServiceType#toByteArray
  (java.io.ByteArrayOutputStream)