Although commonly referred to as an "RJ45" in the context of Ethernet and category 5 cables, it is incorrect to refer to a generic 8P8C connector as an RJ45. A telephone-system-standard RJ45 plug has a key which excludes insertion in an un-keyed 8P8C socket.[10] The registered jack (RJ) standard specifies a different mechanical interface and wiring scheme for an RJ45S from TIA/EIA-568-B which is often used for modular connectors
wiecie, że popularna skrętka zwana RJ-45 poprawnie pownna być nazywana jako 8P8C?
http://en.wikipedia.org/wiki/Registered_jack#RJ45
http://en.wikipedia.org/wiki/8P8C_modular_connector#8P8C