To provide a called one with information on the caller, a reference to a resource containing real-time or near-real-time information relating to the caller, or information deduced using the real-time or near-real-time information, or the real-time or near-real-time information, or the information deduced using the real-time or near-real-time information, is transmitted with a connection establishment request, and the information in the resource or the received information is displayed to the called one before the requested connection is established so that the called one can make a decision whether or not to answer the call.