Listing 1: SimpleSIPServlet.java

package com.bea.example.simple;

import java.io.IOException;
import javax.servlet.*;
import javax.servlet.sip.*;

public class SimpleSIPServlet extends SipServlet {

    protected void doMessage(SipServletRequest req)
        throws ServletException, IOException
    {
        SipServletResponse res = req.createResponse(200);
        res.send();
    }
}