Abstract: A method of operating a packet switching network is disclosed in which a Systems Network Architecture (SNA) computer can control a remote terminal cluster controller and terminals coupled thereto via a switched virtual circuit connection to the terminal cluster controller. The terminals coupled to the terminal cluster controller are able to establish switched virtual circuit connections to other compatible computers, independent of the computer by which the terminal cluster controller is controlled. This is achieved by an access module of the network, to which the terminal cluster controller is connected, presenting different representations of the terminal configuration to the different computers.