RJ45 Abbreviation

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Popular abbreviations of RJ45:

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What does RJ45 mean?

RJ-45 is the short form for Registered Jack-45. It is a type of connector which is used along with twisted-pair cables. The connector is the most commonly used type of Registered Jacks and is prominently used alongside Ethernet cables. RJ-45 looks very similar to a common telephone jack but is only a bit wider than it.

The number 45 in the moniker RJ-45 refers to the number of the interface standard. Technically, the RJ-45 standard uses a connector known as 8P8C which specifies the 8 positions and 8 contacts of the connector.

Structure of an RJ-45

A normal RJ-45 connector consists of eight pins that connect with eight separate cable wires. One can see the eight wires in an Ethernet cable in which four wires are solid colored wires while the other four wires are striped in nature. The different out-pins are used to specify the wires that need to be attached while connecting to an RJ-45 connector.

What is a registered jack?

In telecommunications, a registered jack is a network interface that is needed for the connection between a voice or data equipment and a local carrier. It also specifies the certified international standard for network interfaces. Several interfaces defined for the Registered Jack standard are RJ-14, RJ-11, RJ-21, RJ-45 and RJ-48.

Applications of RJ-45

• Registered Jack-45 are very often used in the networking and telephone industry. The commonly used Ethernet cables use these connectors. Since Ethernet cables consist of RJ-45 connectors on both sides, they are often known as RJ-45 cables.
• They are also employed in the case of flood-wired environments. In such instances, the blue pair transports network and telephone signals.
• They are also used in connectors for microphones fitted in radio transceivers.