CCTV Guideline

What is RJ45 connector & Colour Code Diagram?

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On 2023-08-05

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Table of Contents

What is RJ45 connector?

RJ-45 stands for Registered Jack, so it is a standardized socket. The standardized socket with the number 45 (i.e. the RJ45 plug) is used worldwide for telephone connections and network connections. Cables with twisted wires, so-called twisted pairs, are used in the connector. These RJ plug connections were introduced in the USA in the 1970s and standardized shortly afterwards. Since the American companies in the telephone and telecommunications industry used the RJ plug connections on a very large scale, some plug types such as the RJ45 became widespread worldwide.

What is the RJ45 assignment for Ethernet?

A distinction is made between two types of connection assignments for Gigabit Ethernet. The assignment for the TIA 568A standard is as follows:

Pin 1: white/green

Pin 2: green

Pin 3: white/orange

Pin 4: blue

Pin 5: white / blue

Pin 6: orange

Pin 7: white/brown

Pin 8: brown

What about the TIA standard?

There are some differences in the TIA 568B standard. The following applies here:

Pin 1: white/orange

Pin 2: orange

Pin 3: white/green

Pin 4: blue

Pin 5: white / blue

Pin 6: green

Pin 7: white/brown

Pin 8: brown

RJ45 assignment for Ethernet

How do I connect the RJ45 plug to a CAT 7 cable?

The RJ45 connector is also crimped onto the CAT 7 network cable useful for CCTV connections such as uniview, dahua and hikvision. In addition to the plug and cable, you also need crimping pliers. We have already described the exact procedure to you above in the text. You can also find photo instructions and video tutorials on the Internet.

Which cable do I need for the RJ45 connector?

Only certain cables are suitable for network technology; you cannot use just any cable.

To make your own network cable, you will need:

an RJ45 connector
a crimping tool for RJ11 and RJ45
a CAT 5, CAT 5e, CAT6 or CAT 7 cable
a cable cutter
a wire stripper
a cable tester

But what is the difference between the cables? First of all, all of the cables that we have listed here are network cables. The CAT 5 is used in most installations and is therefore considered the standard. Signal rates of up to 100 megahertz are possible. Nevertheless, CAT 6 or CAT 7 cables are now being laid more frequently in the professional environment. CAT 6 is something like the all-rounder. The cable reaches operating frequencies of a maximum of 250 megahertz. But the longer the cable, the lower the transmission speed. The cable can only meet the standard if it is protected from spurious signals and noise. CAT 7 is the upgrade of CAT 6, the cable is shielded and creates a frequency of a maximum of 600 megahertz. For really fast internet that would be the cable of your choice – if the appropriate sockets are used.

RJ45 Cable

What is the difference between EIA and TIA?

Strictly speaking, you actually want to know what the difference is between the two standards EIA / TIA 568A and EIA / TIA 568B. In the two versions, only two pairs of wires are interchanged:

Twisted pair cable 2 (white/orange)

Wire pair 3 (white/green) both assignments are correct and valid.

EIA and TIA

EIA stands for Electronic Industries Alliance, TIA for Telecommunications Industry Associations. There is also the ITU, the International Telecommunications Union. These three organizations have defined the two standards mentioned, which are used in computer networks (LAN for short) in the Ethernet. EIA / TIA 568B is used more frequently.

How do I attach the RJ45 plug to the network cable?

If you want to crimp the RJ45 connector, you need the right tool. Because when you crimp, you connect two components together so that they are plastically deformed. If you now want to attach your RJ45 plug to a patch cable, make sure that you really have a patch cable and not a laying cable in front of you. You need special plugs for installation cables. Then you proceed like this:

Slide the anti-kink sleeve onto the cable.
Sheath the patch cord to about an inch and a half.
Place the exposed film and wire mesh back over the cable.
Arrange the wires alternately: white/orange, orange, white/green, blue, white/blue, green, white/brown, brown.
Shorten the veins to an inch.
Gently push the connector onto the cable so that the wires are well connected at the front.
Let the sheath of the cable protrude a few millimetres into the connector.
Press the connector with a crimping tool.
Slide the kink protection cover over the connector.
Check the wire assignment with the cable test.

The patch cable is now ready for use. Please note: If you want to connect two computers directly, you need a crossover cable. You have to change the arrangement of a crossover cable on the second page.