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Although commonly referred to as RJ45 in the context of Ethernet and structured cabling, RJ45 originally referred to a specific wiring configuration of an 8P8C female connector. [ 14 ] [ 15 ] [ 16 ] The original telephone-system-standard RJ45 plug has a key that excludes insertion in an un-keyed 8P8C socket.
Strictly, Registered Jack refers to both the female physical connector (modular connector) and specific wiring patterns, but the term is often used loosely to refer to modular connectors regardless of wiring, gender, or use, commonly for telephone line connections, but also for Ethernet over twisted pair, resulting in confusion over the various ...
Intentionally crossed wiring in the crossover cable connects the transmit signals at one end to the receive signals at the other end. Many network devices today support auto MDI-X (automatic crossover) capability, wherein a patch cable can be used in place of a crossover cable, or vice versa, and the receive and transmit signals are ...
Some keystones use a pass-through type connector, where there is a jack on both the front face and the rear side. Others only have a jack on the front and employ a different mechanism for hard-wiring signal cables to the rear, such as a mini 110 block , an insulation-displacement connector , or a crimp or solder connection.
For example, telephone cables in the UK typically have a BS 6312 (UK standard) plug at the wall end and a 6P4C or 6P2C modular connector at the telephone end: this latter may be wired as per the RJ11 standard (with pins 3 and 4), or it may be wired with pins 2 and 5, as a straight-through cable from the BT plug (which uses pins 2 and 5 for the ...
For 10BASE2, the connection to the coaxial cable was typically made with a single BNC connector to which a T-piece was attached. For twisted-pair cabling 8P8C, modular connectors are used (often called RJ45 in this context). For fiber, a variety of connectors are used depending on manufacturer and physical space availability.
The chassis connector is always female and has the standard form factor of an XLR panel connector. The chassis connector may be mated with an EtherCON connector and a standard 8P8C plug. The chassis connectors are rated for either Cat 5e , Cat 6 or 6A compatibility, with the Cat 5e and 6A models being cross-compatible.
The movable (less fixed) connector is classified as a plug (denoted P), [37] designed to attach to a wire, cable or removable electrical assembly. [38] This convention is currently defined in ASME Y14.44-2008, which supersedes IEEE 200-1975 , which in turn derives from the long-withdrawn MIL-STD-16 (from the 1950s), highlighting the heritage of ...