A telephone jack and a telephone plug are electrical connectors for connecting a telephone set or other telecommunications apparatus to the telephone wiring inside a building, establishing a connection to a telephone network. The plug is inserted into its counterpart, the jack, which is commonly affixed to a wall or baseboard. The standards for telephone jacks and plugs vary from country to country, though the 6P2C style modular plug has become by far the most common type.
A connection standard, such as RJ11, specifies not only the physical aspects of an electrical connector, but also the signal definitions for each contact, and the pinout of the device, i.e. the assignment or function of each contact.[1] Modular connectors are specified for the registered jack (RJ) series of connectors, as well as for Ethernet and other connectors, such as 4P4C (4 position, 4 contacts) modular connectors, the de facto standard on handset cords,[2] often improperly[3][4] referred to as RJ connectors.
^Semenov, Andrey B.; Strizhakov, Stanislav K.; Suncheley, Igor R. (October 3, 2002). "Electrical Cable Connectors". Structured cable systems (1st ed.). Springer. p. 129. ISBN 3-540-43000-8. The abbreviation for registered jack, RJ defines a particular wiring scheme of individual wires into outlet contacts. For example, a 6-position outlet may be wired to RJ-11C scheme (one pair), RJ-14C (two pairs), or RJ-25C (three pairs).
^BICSI (October 7, 2002). "Background Information". Telecommunications Cabling Installation (2nd ed.). McGraw-Hill Professional. p. 88. ISBN 0-07-140979-3. 4-position and 4-contact connectors are used primarily for telephone handset cords.
^Trulove, James (December 19, 2005). "User Cords and Connectors". LAN wiring (3rd ed.). McGraw-Hill Professional. p. 219. ISBN 0-07-145975-8. This 8-pin modular plug is probably the most subject to name abuse, because it resembles the specialized RJ-45 connector. However, the RJ-45 wiring pattern (which includes an interface programming resistor) is so radically different from that of T568A and B that it really should not be called by that name at all.
^Oliviero, Andrew; Woodward, Bill (July 20, 2009). "Connectors". Cabling: The Complete Guide to Copper and Fiber-Optic Networking (4th ed.). Sybex. p. 294. ISBN 978-0-470-47707-6. The RJ (registered jack) prefix is one of the most widely (and incorrectly) used prefixes in the computer industry; nearly everyone, including people working for cabling companies, is guilty of referring to an eight-position modular jack (sometimes called an 8P8C) as an RJ-45.
and 22 Related for: Telephone jack and plug information
telephonejackand a telephoneplug are electrical connectors for connecting a telephone set or other telecommunications apparatus to the telephone wiring...
between telephone company equipment and customer premises equipment.[citation needed] These interfaces used newly standardized jacksandplugs, primarily...
connector, and Western jackandplug. The term modular connector arose from its original use in modular wiring components of telephone equipment by the Western...
connector, phone plug, or phone jack may refer to: Telephoneplug, used to connect a telephone to the telephone wiring in a home or business, and in turn to...
British telephone sockets were introduced in their current plugand socket form on 19 November 1981 by British Telecom to allow subscribers to connect...
(wireless charger), for iPhone and AirPods MC4 connector Phone connector (audio) RCA connector Speaker terminal Telephonejackandplug USB Robert Fay (August...
tripolar telephoneplug of Italy and also the Swedish telephoneplug. The plastic pin adds a presence function. When not inserted into a jack, the jack itself...
A telephone switchboard was a device used to connect circuits of telephones to establish telephone calls between users or other switchboards, throughout...
Tip and ring are the two conductors or sides of a telephone line. Their names are derived from the telephoneplugs used for connecting telephone calls...
voltages and more current than the line could supply. Typically, the power came from a transformer plugged into a power outlet near the telephonejack, wired...
cord) into the called party's local jackand started the ringing cycle. For a long-distance call, the operator plugged into a trunk circuit to connect to...
Phone connectors A pair of plugs, known as "GA" or general aviation plugs. 1/4-inch plug for audio (PJ-055), and a 3/16-inch plug for the microphone (PJ-068)...
combination of headphone and microphone. Headsets connect over a telephone or to a computer, allowing the user to speak and listen while keeping both...
to plug a "known good" telephone into the jack to isolate trouble. If the telephone works at the test jack, the problem is the customer's wiring, and the...
diversified and focused its efforts in the area of transformers and filters for power lines, military electronics, telephonejacksandplugs. In 1961, ADC...
used manual telephone switchboards, and switchboard operators connected calls by inserting a pair of phone plugs into the appropriate jacks. They were...
generally a receptacle that receives and holds the male connector. Alternative terminology such as plugand socket or jack are sometimes used, particularly...
Wiretapping, also known as wire tapping or telephone tapping, is the monitoring of telephoneand Internet-based conversations by a third party, often...
Plug board may refer to: Plugboard, a component of certain encryption machines, unit record equipment and some early computers Telephone switchboard, another...