alexander graham bell attenuation bnc connector balanced circuit balanced line balun baseband cable coaxial cable computer networking differential signaling electromagnetic interference electromagnetic radiation electromagnetic shielding electromotive force electronic circuit ethernet ethernet crossover cable ethernet over twisted pair foil inductance insulation-displacement connector kilometre landline lawsuit mile ohm optical fiber patch cable plain old telephone service printed circuit board prosumer radio over ip registered jack ribbon cable screw terminal single-wire earth return structured cabling telephone telephone line television tip and ring token ring tram utility pole video video recorder voiceband wikimedia commons