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What are the Differences between RJ45 and RJ11 Connectors?

The Ethernet cable is the most commonly used component in a home network. It can also be terminated with various RJ type connectors, such as Rj45 Connector and RJ11 connectors. The letter "RJ" stands for registered jack. It is a standard telecommunication network interface. Designed by Bell Systems and managed by the Federal Communications Commission (FCC), it is used to connect voice and data equipment to services or long distance carriers provided by local exchange operators. Because these two connectors have a similar appearance, many people often mix them together.


Rj45 Connector


Rj45 Connector


Difference between RJ45 connector and RJ11 connector

Although the RJ45 and RJ11 connectors have similar appearances, there are still some differences between them:


First, application of RJ45 connector and RJ11 connector

The biggest difference between the RJ45 connector and the RJ11 connector is where they are actually used. RJ45 connector is used in the network, you can connect computers or other network elements to each other, while RJ11 is a cable connector for telephones, ADSL and modem cables, etc.


Structure of RJ45 connector and RJ11 connector

RJ45 connector and RJ11 connector apart from the application, the connector structure is also different, individuals can easily view and identify. If you look closely at the two connectors, you will find that there are only four wires inside RJ11 and eight wires inside RJ45. The RJ45 connector is also a bit larger than the RJ11 because it must accommodate more wires.


Third, the wiring scheme of RJ45 connector and RJ11 connector

Another difference between the two connectors, RJ45 and RJ11, is their wiring scheme. A typical RJ11 connector has six terminals and usually only uses the middle four pins. For example, POTS (ordinary old-style telephone lines) usually contains two pairs of wires. They are designed for two independent telephone lines. ) Including the first telephone line, the connection method of the telephone system is also different.


For RJ45 connectors, it has two different wiring schemes-T-568A and T-568B. These two cabling schemes can be used to create crossover or straight-through cables. A crossover cable has a T-568A connector on one end and a T-568B connector on the other end. It is usually used for direct computer-to-computer connections when no router, hub, or switch is available. The straight-through cable has T-568A or T-568B at both ends for connecting different types of equipment.


The above is the difference between RJ45 and RJ11 connectors introduced by Rj45 Connector Manufacturer.

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