communications cabling and wiring products; namely, single line testers, adaptors, connectors, plug jacks, signal boosters, surge protectors, wall outlets, modular jacks, communication terminal servers, network connectors, wiring and feeder cables, plugs, cords, wall plates, feeder splits, baluns, cross connects, distribution frames, test equipment, transceivers, repeaters, switches, cable clips, cable markers, cable ties and couplings