RJ11/RJ12 verses RJ45

 

Xmultiple's Engineering Department


RJ11/RJ12 vs RJ45

The registered jack standard has been around for some time for people to follow in wiring their telephone lines. It is abbreviated into RJ and is then followed by two digits that identify the specific standard. The RJ12 and RJ45 standards are quite closely related and in fact look identical to each other to the uninitiated. They have different numbers of positions and contacts. The RJ12 is a six slot connector. The RJ45 is an eight slot connector. Therefore the difference between the RJ12 and RJ45 is in how they are wired and the number of the wires that are being used.

RJ12 is a 6P6C wiring standard. This means that there are also 6 wires that are terminated in the connector, occupying all the available slots.

RJ45 is a 8P8C wiring standard. This means that there are also 8 wires that are terminated in the connector, occupying all the available slots.

 

Is this answer helpful?

 

Back to Search Knowledge Base

Back to Discussion Forum

Back to Frequently Asked Question

Glossary of Terms