// вот метод отправки в службе:

    private void sendPacket(String reply, byte[] data) throws IOException {
        try {
            Log.logger.trace(this + "< " + reply + "; data.length = " + data.length);
            byte[] str = reply.getBytes(encodeCash);
            byte[] buf = new byte[1 + str.length + data.length + 8];
            buf[0 + 8] = (byte) str.length;
            System.arraycopy(str, 0, buf, 1 + 8, str.length);
            System.arraycopy(data, 0, buf, 1 + 8 + str.length, data.length);
            int size = buf.length - 4;
            buf[3] = (byte) (size & 0xff);
            buf[2] = (byte) ((size >> 8) & 0xff);
            buf[1] = (byte) ((size >> 16) & 0xff);
            buf[0] = (byte) ((size >> 24) & 0xff);
            buf[7] = (byte) (version & 0xff);
            buf[6] = (byte) ((version >> 8) & 0xff);
            buf[5] = (byte) ((version >> 16) & 0xff);
            buf[4] = (byte) ((version >> 24) & 0xff);

            bos.write(buf);
            bos.flush();
            os.flush();

            Log.logger.trace(this + "SendPacket - Ok");

        } catch (IOException e) {
            throw e;
        }
    }