Difference between RJ11 and RJ14

RJ-11 is the most popular telephone line connector. It has two rows of two pins, totaling four pins. With this setup, a single connection can be used to connect two distinct telephone lines. RJ14 and RJ11 are extremely similar, but RJ14 includes an extra two pins for data transmission.

RJ11 can support only two wires, but RJ14 can support four wires. This means that you must use an RJ-14 connector if you need to connect more than two telephone lines. The fact that RJ14 is a little bit bigger than RJ11 means that it might not fit in all locations intended for an RJ11 connector.

The number of connectors is the primary distinction between RJ11 and RJ14. In contrast to RJ14's six connectors, RJ11 has four connectors. The fundamental difference between the RJ11 and the RJ14 is also in the wiring arrangement. Accordingly, an adapter will be required if you are connecting an RJ11 device to an RJ14 connection.

Read this article to find out more about RJ11 and RJ14 and how they are different from each other.

What is RJ11?

A common phone connector used in some nations is RJ11. The most common use is to attach a phone to a wall socket or a phone modem. The six pins of RJ-11 connections are organized in two rows of three. The tip and ring signals are sent on the two outer pins, while the data signals are sent on the four inside pins.

The most often registered jack type is known as a RJ11. It is also compatible with some Ethernet applications and is commonly used to connect telephone lines. Four pins are located in two rows of two on RJ11 connections. These pins are made to transport signals both ways.

When RJ11 is followed by a suffix like RJ11s, RJ11c, or RJ11w, it frequently denotes the presence of a secondary function. The RJ11w suffix designates the jacks that can be employed differently. For the connector used for desktop connections, the suffix "c" in RJ11c is used.

North America uses RJ11 as its standard phone connector. In a two-row grid, there are four pins total. The two rows are separated from one another by a small amount since the top row is somewhat longer than the bottom row. RJ11 cables are frequently used to connect telephone lines and other low-speed data applications.

What is RJ14?

A registered jack called RJ-14 is used for data and phone applications. It features two extra pins but is otherwise quite similar to the RJ-11 in design. This makes it suitable for applications involving both voice and data. The additional pins are situated next to the RJ-11's two existing pins.

These 6P4C connections, which have six pins and four contacts, were created so that they could support additional telephone lines. RJ11 and RJ14 are the two most popular registered jack types used in the telecom industry. Both are widely used, and each has its own set of advantages and disadvantages.

RJ14 connectors contain six pins, which are organized in three rows of two, as opposed to RJ11 connectors' eleven pins. Higher data speeds are possible with this arrangement, which also supports full-duplex operation (meaning that the data can flow in both directions simultaneously). It should be noted, nonetheless, that RJ-14 connectors are not appropriate for use with all Ethernet applications. Compatibility with other application types also varies.

Differences between RJ11 and RJ14s

The following table highlights the major differences between RJ11 and RJ14s −





6P2C or 6P4C


Total wires

2 wires

4 wires


1 phone

2 phones


2 contacts

4 contacts


6 pins

6 pins

Wire alignment

Pin 3 obtains the negative wire, and Pin 4 obtains the positive wire.

Pin 2 obtains the negative wire, while Pin 5 obtains the positive wire.


In conclusion, these two varieties of registered jack connections have some significant distinctions from one another. The arrangement and quantity of pins are the most obvious differences.

Despite having two more pins on the top row of the grid, RJ14 is fairly similar to RJ11 in terms of the number of pins. Because of this, RJ11 connectors cannot be used with it. RJ-14 connectors are commonly used to connect Ethernet cables and other high-speed data applications.