Cable (200) for connecting an image displaying device (133) to a digital computer network (120), which cable (200) comprises only a first end (201), arranged to receive a digital network signal, and a second end (202), arranged to be connected to the image displaying device (133) and deliver a digital image signal to the image displaying device (133). The invention is characterised in that the cable (200) comprises an integrated general-purpose programmable computer device (203), arranged to execute a piece of cable computer software in turn arranged to read the network signal and produce said image signal using the said network signal, and in that the computer device (203) is arranged to be powered by a voltage provided y an ethernet socket (121) to which the first end (201) is arranged to be physically connected or by an image signal receiving socket to which the second end (202) is arranged to be physically connected.