![]() ![]() Many applications that originally used bulkier, more expensive connectors have converted to modular connectors. The convenience of prior existence for designers and ease of use led to a proliferation of modular connectors for many other applications. The Federal Communications Commission (FCC) mandated in 1976 an interface registration system, in which they became known as registered jacks. Modular connectors were originally developed for use on specific Bell System telephone sets in the 1960s, and similar types found use for simple interconnection of customer-provided telephone subscriber premises equipment to the telephone network. ![]() This is the common crimp-type plug, of the same kind pictured above crimped onto a cable (with molded sleeve).Ī modular connector is a type of electrical connector for cords and cables of electronic devices and appliances, such as in computer networking, telecommunication equipment, and audio headsets. Left to right, modular connectors: 8P8C plug, 6P6C plug, 6P4C plug, 4P4C plug, 6P6C jack. JSTOR ( May 2023) ( Learn how and when to remove this template message).Unsourced material may be challenged and removed.įind sources: "Modular connector" – news Please help improve this article by adding citations to reliable sources. RJ12 connectors can be used in place of RJ11 because RJ12 has all the connectors RJ11 needs (plus 4 extra).This article needs additional citations for verification. They are used to connect a phone line with the key telephone system, small exchange-like systems used by businesses to connect to the carrier on the outside and create a network of phones and extensions on the inside. RJ12 connectors are also similar to RJ11 but have a 6P6C configuration. It is not an official ACTA (Administrative Council for Terminal Attachments) specification. It has a 4P4C configuration and is used in handset cords. RJ22, also called an RJ10, is the smallest of the modular plugs. RJ61 is a similar registered jack for 4 lines it uses an 8P8C configuration similar to the RJ45. ![]() RJ25 uses all 6 of the available positions (6P6C) and is able to connect 3 lines. RJ14 is similar to RJ11 but is wired for two phone lines it uses a 6P4C configuration where 4 connectors out of the 6 positions are used. The RJ11 technically uses the center 2 contacts of 6 available, and is used for wiring a single phone line. These are all modular connectors with 6 available positions. All three jack types are used to connect phones-for one-, two-, and three-line service respectively. RJ11 is the most widely-used connector, followed by RJ14, and RJ25. This includes phone lines and ADSL connections. With only 2 of the 6 available connection points, the RJ11 plug supports limited-bandwidth applications. RJ11 is used for connecting single phone lines and uses a 6P2C or 6P4C configuration. RJ45 is also sometimes used for VOIP phones in offices. Overall bandwidth is, of course, contingent upon what other components of the network such as cabling or routers can support. Using 8 contacts allows for greater bandwidth so RJ45 is used for data-intensive applications like Ethernet and can support bandwidth up to 10Gbps. As shown in the schematic above, RJ45 uses an 8P8C configuration, which means 8 Positions and 8 Contacts (or connectors, or conductors). ![]()
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