Computer Hardware Terms, Glossary and Dictionary

Registered Jack (RJ) is a general term for electrical connector designs registered with the US Federal Communications Commission, including the RJ-11, RJ-14, RJ-25, RJ-48, RJ-61 and RJ-45 connectors. The most familiar registered jacks are the 4-conductor and the 6-conductor connectors known variously as RJ-11, RJ-12 and RJ-14, and the 8-conductor RJ-45, all sometimes simply called RJ connectors. These are commonly used in building wiring for telephone and local area networks. They were originally invented and patented by Bell Labs.

Related Terms

RJ: Registered Jack