RJ stands for registered jack, a series of standard wiring configurations and physical connectors used in telecommunications and data networking. The designation specifies both the physical connector type and the wiring pattern. The most common examples are the RJ11 used for standard analog telephones and the RJ45 used for Ethernet networking.
Heard on the job
Make sure you use the correct crimper for those pass-through RJ connectors.
Also heard as
- registered jack