code: protected void doResponse(javax.servlet.sip.SipServletResponse resp) throws javax.servlet.ServletException, java.io.IOException{
      	int status = resp.getStatus();
  		if (status < 200) {
  			doProvisionalResponse(resp);
  		} else {			
  			if (status < 300) {
  				doSuccessResponse(resp);
  			} else if (status < 400) {
  				doRedirectResponse(resp);
  			} else {	
  				doErrorResponse(resp);
  			}				
  		}
      }
docs: Invoked to handle incoming responses. This method dispatched responses to one of the
  ,
  ,
  . Servlets will not usually need to override this method.