code: public static void addSipSubcontext(Context envCtx) {
  		try {
  			envCtx.createSubcontext(SIP_SUBCONTEXT);
  		} catch (NamingException e) {
  			logger.error(sm.getString("naming.bindFailed", e));
  		}
  	}
docs: Add the sip subcontext to JNDI
  @param envCtx the envContext to which the sip subcontext should be added