Registered Jacks
A registered jack (RJ) is a standardized physical network interface — both jack construction and wiring pattern — for connecting telecommunications or data equipment to a service provided by a local exchange carrier or long distance carrier. The standard designs for these connectors and their wiring are named RJ11, RJ14, RJ21, RJ45, RJ48, etc. Many of these interface standards are commonly used in North America, though some interfaces are used world-wide.
The physical connectors that registered jacks use are mainly of the modular connector and 50-pin miniature ribbon connector types. For example, RJ11 uses a 6 position 2 conductor (6P2C) modular plug and jack, while RJ21 uses a 50-pin miniature ribbon connector.
Read more about Registered Jacks: Naming Confusion, Twisted Pair, History and Authority, International Use, RJ11, RJ14, RJ25 Wiring Details, RJ21, RJ45, RJ48, RJ61
Famous quotes containing the word registered:
“But ice-crunching and loud gum-chewing, together with drumming on tables, and whistling the same tune seventy times in succession, because they indicate an indifference on the part of the perpetrator to the rest of the world in general, are not only registered on the delicate surfaces of the brain but eat little holes in it until it finally collapses or blows up.”
—Robert Benchley (1889–1945)