RJ45 pinout. Crimp (pinout) color schemes for twisted-pair cable in an RJ-45 plug

It is difficult to unambiguously answer the question of why you need to know how RJ45 pinout and cable crimping are performed at home. First of all pinouts are demanded by people who decided to carry out repairs in the apartment. Banal replacement of the cable sticking out of the window frame, and the breeding of high-speed network in rooms serves as a second reason. The third one needs to connect specific equipment, someone wants to play on the network between two computers. Knowledge is not superfluous.

About cable and instrument

The most important component is the twisted pair cable. On counters of shops meets with four and with eight veins. The difference in price is due to the country of origin and additional screening. Without going into electrophysics, we will clarify that the cable received the name “twisted pair” because all the pairs of wires lived between themselves are intertwined.This interlacing allows you to transmit a signal over a cable over a long distance (up to 100 meters without an amplifier). RJ45 pinouts are made by color. For each task there is a certain sequence, moreover, each cable color corresponds to its position in the socket or connector.

RJ45 pinout

A special crimping tool is used to crimp the cable, but if it is not at hand, a hammer, a flathead screwdriver or a knife will do. Required for networking and RJ45 plug. You can replace it with the old one by cleaning the conduit for the wires, or expose the protruding ends of the wires for twisting.

Cable crimping technology

RJ45 cable pinout requires special training. The main thing is to remember that the technology is unchanged for cable crimping. Only the sequence of colors of the cable cores changes.

  1. Carefully cut off the upper layer of the winding. The length of the cut is about 5-6 cm for easy wiring.
  2. The twisting of all pairs is unwound and the wires are aligned so that they do not intersect from the base of the upper layer to the ends of the wires.
  3. The cores arranged in the required color range are cut off with scissors so that the length from the tips to the base of the common cable does not exceed 3 cm.
  4. While holding the plastic RJ45 plug with the clamping clip down, the strands are gently inserted into the case. If you look closely, there is a special channel for each core in which it is impossible to insert two cables. The main thing is to withstand the desired sequence.
  5. With a little effort, make sure that the ends of the wires touch the copper inserts on the edge of the crimp connector.
  6. Without letting the cable slide out of the connector, carefully crimp each core by pushing a copper insert with a screwdriver or knife. You can gently increase the pressure with a hammer.

RJ45 pinout by color

As a result of the work done, all conductors must be securely fastened in the plastic case of the RJ45 plug. The other end of the clip with a common braid can be cut together for convenience with tape.

Cable routing technology in the outlet

RJ45 socket pinout does not require any specialized equipment, so the layout of the local network on the object is performed with great pleasure and speed. You only need one tool - nail scissors or a small knife with a thin blade.

  1. Carefully cut off the upper layer of the winding. The length of the slice of the order of 10 cm for easy wiring.
  2. The twisting of all pairs is unwound and the wires are aligned so that they do not intersect from the base of the upper layer to the ends of the wires.
  3. Each outlet has two color markings. “A” - cross connection, “B” - connection standard. According to the last marking, RJ45 pinout is performed.
  4. Attaching the base of the braid to the board, first the wires are inserted into the far connectors. Be sure to check the cable tension so that the distance from the braid to the clamp does not exceed 3 cm.
  5. When the cable cores are secured in the correct connectors, crimping is performed. Holding the nail scissors so that the angle of the cutting guides is 45 degrees, it is necessary to press on the core from above to the characteristic metallic click.

pinout RJ45 sockets

Installation of the socket for a century

The main thing to consider when installing a network outlet on the wall is the position of the connectors relative to the floor. Connectors should always be pointing down. Firstly, it protects the contacts from clogging with dust and moisture. Secondly, with the quick connection of the cable from below, there is less chance of accidentally knocking the outlet fastening on the wall. Even from an aesthetic point of view, the cable connection from the bottom is not so striking and does not spoil the beautiful situation in the room.

RJ45 cable pinout

In addition to the direct assignment, a computer network outlet is used to transmit extraneous signals (telephony, stereo, video). After all, it is not a secret to anyone that for connecting the Internet RJ45 pinout is critical for four veins, the rest are either spare or for gigabit networks that are not organized in households in the post-Soviet countries.

Connect to the Internet in a standard way

RJ45 pinout for colors when creating a cable for connecting a personal computer to network equipment looks like this.

  1. White and orange.
  2. Orange.
  3. White and green.
  4. Blue.
  5. White and blue.
  6. Green.
  7. White brown.
  8. Brown.

If there is a need to make a connection to two computers using one cable or to send another signal through the free conductors, then the pinout is performed in two pairs - green and orange, observing the sequence and numbering in the connector. That is, connections 1, 2, 3, 6 in the RJ45 plug must be occupied according to their color distributions.

pinout rj45 usb

There are cases when one or several active veins are killed. An alternative RJ45 pinout will come to the rescue. 2 pairs are replaced by other colors.The orange pair is replaced by brown, and the green pair by blue. The numbering of connectors in the plug does not change.

Interconnection of two computers

Recently, pinout RJ45 computer-to-computer is not in demand. After all, most modern network adapters have learned to understand what the user is seeking from them. Information is useful to those owners whose adapters do not know how to "turn" the wires in the power plug.

One connector Second connector
1 White green 1 White orange
2 Green 2 Orange
3 White orange 3 White green
4 Blue 4 Blue
5 White blue 5 White blue
6 Orange 6 Green
7 White brown 7 White brown
8 Brown 8 Brown

pinout rj45 computer computer

This cable is also suitable for connecting two network hubs that do not have an Uplink switch. For easy memorization of the color pinout of the cross-cable, it is enough to see that the pairs 1-2 have changed places with the pairs 3-6. The rest of the color pairs should be paid attention if the network adapters can work in gigabit networks, otherwise they can be used for other needs.

Connection of peripheral equipment

It is unlikely that the majority of RJ45-USB pinout is useful, but getting knowledge of it will not hurt.Such a strange connection is actively used when connecting expensive server systems, and is also quite popular in the banking industry, when connecting office equipment and cash registers. It is better to make a pinout with a soldering iron, but in its absence, everything will work on twisting.

RJ45 pinout 2 pairs

Fully crimped cable in the RJ45 plug is cut with a knife to the desired length. The trimmed end is stripped off the winding by 5 cm. Any USB cable plug is disassembled or clipped so that access to the connectors is reached. Before you cut the wires in the USB-plug, you need to strip the red and black cables to the copper base and twist them together. After all the manipulations, the following RJ45 USB connection is made.

  1. The white-green core from the third connection is soldered to a red-black USB twist (GND).
  2. The blue core of the fourth connector is connected to the green USB (RX) cable.
  3. The white and blue core of the fifth connection is connected to the white USB (TX) cable.

For structural strength, you can use tape.

Finally

Pinout RJ45 should not be a big deal. Do not worry that due to poor crimping, the communication channel will disappear or a short circuit will occur.Nothing of the kind even in theory will be. Working inaccurately with a knife or screwdriver instead of a professional tool, you can only create a small noise in the line, which is reduced to zero on the cable segments up to five meters. But you still need to strive to achieve the maximum result. It is better to do it once, but to do the work efficiently and forever.

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