Computer apparatus, namely, a converter that superimposes an Ethernet signal on an existing cable; Computer equipment, namely, wireless cards; Computer hardware, namely, wireless access point (WAP) devices; Computer hardware, namely, wireless network repeaters; Computer network bridges; Computer network hubs, switches and routers; Electronic equipment for point-of-sales (POS) systems, namely, point-of-sale terminals, bar code readers, optical readers, advertisement display monitors, keyboards...