Registered Jacks

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

Other articles related to "registered jacks, jacks":

Registered Jacks - RJ61
... It is one of the Registered Jacks, and uses an eight position, eight conductor (8P8C) modular connector ... traditionally used with 4-line analog telephones and RJ61 jacks is also unsuitable for use with high-speed data ...
Registered Jack - History and Authority
... Registered jacks were created by industry and regulated by the FCC to be the standard interface between a telephone company and a customer ... The customer is responsible for jacks, wiring, and equipment on their side of the MPOE ... required Bell to allow some interconnection, which culminated in registered jacks ...

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