Hi, Could you please help me in getting some info for the following . How does PJSIP handles request with in a dialog . For example a subscribe request with in a invite session . Do i need to do some thing special to catch the requests with in a dialog ? Or can I use the call back on_rx_request call back to handle all the requests for a B2BUA which can handle/ forward the request/responses for NON INVITE methods . with thanks and regards Mahesh