// Need to add a listener or a servlet to ensure that SipFactory is set in JNDI
context.getSipMetaData().addListener("org.cipango.plus.sipapp.Listener");
context.setConfigurations(new Configuration[] {envConfiguration, plusConfiguration, new SipXmlConfiguration()});
context.preConfigure();
context.configure();
context.postConfigure();
context.getSipMetaData().resolve(context);
Object lookup = ic.lookup("java:comp/env/resource/sample");