![]() ![]() The channels fit into a matching socket and the connectors lock in place with a tab making them secure but also removable. RJ45 devices, like all modular connectors, contain metal contacts separated by insulating plastic channels. The RJ system covers the physical connector, wiring patterns, and signal specifics. This was done to ensure compatibility between phone company hardware and consumer equipment. The various connectors developed using this system were categorized by the FCC in 1976 into the Registered Jack (RJ) system, giving rise to the RJ label. What is an RJ45 Connector?Īn RJ45 connector is a commonly used modular interconnection device matched with a cable to provide data communication service to various electronic devices and systems. In fact, RJ45 connectors are commonly referred to as Ethernet Connectors. The line has expanded over the years to include data communication mainstays, like the RJ45, which was developed for computer networking. This new connector system offered simple, quick, and convenient setup that could be customized on-site by a technician or installed by the user in the home. One of the most widely used types in the modular family of devices is the RJ45 connector.Īs we have learned in another blog topic, the modular connector system was developed by AT&T in the 1960’s and 1970’s to take the place of bulky phone connectors and their labor-intensive installation. RJ12 connectors can be used in place of RJ11 because RJ12 has all the connectors RJ11 needs (plus 4 extra).The use of modular electronic connectors has been one factor in the explosion of communication and data services around the world. 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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