RJ45 to RJ11 Wiring Conversion Diagram

Are you looking for a way to convert your RJ45 Ethernet cable to an RJ11 telephone cable? This article will guide you through the wiring conversion process and provide you with a diagram to help you get the job done.

What is RJ45 and RJ11?

RJ45 and RJ11 are both types of connectors used in telecommunication networking. RJ45 is an 8-pin connector primarily used for Ethernet networking, while RJ11 is a 4-pin connector used for telephone connections.

What are the Differences Between RJ45 and RJ11?

Aside from the number of pins, there are other differences between RJ45 and RJ11. RJ45 is larger than RJ11, and it can handle higher bandwidth and data transfer rates. On the other hand, RJ11 is smaller and can only accommodate voice signals, making it ideal for telephone connections.

Can I Convert an RJ45 Cable to RJ11?

Yes, you can convert an RJ45 cable to RJ11 by rewiring the connectors. The conversion process involves removing the RJ45 plug and replacing it with an RJ11 plug, which requires some minor soldering and wiring.

The Wiring Conversion Process

Before you start, make sure you have the necessary tools and materials, including an RJ11 plug, a pair of wire cutters, and a pair of pliers.

Step 1: Identify the Wires

First, locate the individual wires inside the RJ45 cable. The most common wiring standard for RJ45 cables is the T568B standard, which uses four pairs of wires, each with a different color. The pairs are identified as follows:

Wire Pair Colors
Pair 1 Orange/White and Orange
Pair 2 Green/White and Green
Pair 3 Blue/White and Blue
Pair 4 Brown/White and Brown

Step 2: Cut and Strip the Wires

Using the wire cutters, cut the RJ45 cable to remove the connector. Strip the outer sheath of the cable to expose the pairs of wires inside.

Step 3: Separate the Wires

Separate the pairs of wires and untwist them. You should end up with eight individual wires.

Step 4: Organize the Wires

To convert your RJ45 cable to an RJ11 cable, you only need to use the red and green wire pair. Arrange the wires as follows:

Wire Pair Colors
Pair 1 Green/White and Green

Step 5: Strip and Tin the Wires

Strip about 0.5cm of insulation from the end of each wire. Use a soldering iron to tin the ends of the wires with solder. This will help to make the connection stronger.

Step 6: Solder the Wires to the RJ11 Plug

Insert the wires into the RJ11 plug according to the wiring diagram below:

Wire Color Pin
Green Green/White 2
Red Blue/White 3

Once the wires are in place, use the pliers to crimp the RJ11 plug onto the wires.

FAQ

What if my RJ45 cable is wired using the T568A standard?

If your RJ45 cable is wired using the T568A standard, the wire pairs are arranged differently. You should still be able to convert it to an RJ11 cable by following the wiring diagram in this article, but you will need to use the green and red wire pair instead of the green and white wire pair.

Can I use an RJ45 to RJ11 adapter instead of rewiring the cable?

Yes, you can use an RJ45 to RJ11 adapter, but keep in mind that the adapter will not change the functionality of the cable. If you want to use the cable for telephone connections, you will still need to rewire it to an RJ11 connector.

Why would I want to convert an RJ45 cable to an RJ11 cable?

There are several reasons why you might want to convert an RJ45 cable to an RJ11 cable. For example, if you have a long Ethernet cable that you no longer need, but you still need a short telephone cable, you can convert the Ethernet cable to an RJ11 cable rather than buying a new one.