The local cable connects the circuit directly. Correctly crimping the Internet cable

And here the question arises: how to crimp a twisted pair of 8 cores? After all, the connector itself is “tightly” attached to the wire. What now, call the provider again, call specialists, pay them for the work?

As it turns out, the crimping circuit for twisted pair cables is not that complicated. It is quite possible to make such a connection yourself. In addition, twisted pair, the connection of which is done by hand, will save your personal budget. Now let’s try to figure out how to crimp the cable for the Internet.

But first, it’s worth understanding what the Internet cable itself is and how to connect the wires to the connector for it to work properly.

Wire, connector and crimper

The Internet cable contains 8 copper wires, which are twisted in pairs together. That is why such a wire is called twisted pair. The twin wires have a similar color. For example, a pair can be blue and blue-white or brown and brown-white.

There are two types of wires on the counters - shielded (STP) and unshielded (UTP). But, ultimately, these types of cables do the same job, and therefore there is no point in overpaying for the screen. Therefore, the second option would be the best, as it is more accessible for connection. In addition, it has different categories, among which it is worth choosing.

By category, UTP cables can be divided into 3, 5, 6 and 7 (the most common). It is necessary to understand that the lower the category, the lower the quality and, as a result, the price. Today we can distinguish the 5th category, which has proven itself well in operation and at the same time has a very reasonable cost. It is currently the most common.

As for the connector, nowadays almost all devices use Rj-45. Its cost is low, and therefore it is worth buying these switching parts with a reserve, because there is a risk of spoiling them during work due to inexperience.

Also for work you may need a tool called a crimper, i.e. special pliers for crimping the plug. Although you can do without them, provided that you only need to crimp one or two wires - in this case, it’s not worth spending money on it.

Twisted pair crimping methods

Having dealt with the necessary tools and materials, you can begin to choose the option for crimping. After all, the speed of transmission of Internet traffic and other information, and the types of devices with which the cable will be compatible depend on what it will be.

There are two types of pinout: 568 A and 568 V. In turn, they make up two subtypes - direct connection or cross-connection. In addition, there is a simplified pinout, i.e. The twisted pair crimp is 4 wires, not 8. However, with this arrangement, the traffic speed is reduced from 1 Gbit/s to 100 Mbit/s. It is necessary to consider each of the options separately, and start with the simplest ones.

Direct for 4 and 8 wires 568V

Twisted pair, crimped in a 2-pair manner, is used when connecting a computer to switching devices such as a modem, router, etc. When crimping on both sides, the sequence of wires on the contacts is as follows:

1. orange and white;
2. orange;
3. green with white;
4. green.

This color layout leaves pins 4, 5, 7 and 8 unused. Thus, you can connect to the Internet via an ADSL line at a speed of no more than 100 Mbit/sec, but at the same time, a twisted pair 4-core cable is naturally much easier to install.

Twisted pair, the connection of which must be high-speed, requires the use of all 8 wires when crimping. This network cable connection scheme allows you to increase the information transfer speed to 1 Gbit/sec. The order of the veins by color is as follows:

1. orange and white;
2. orange;
3. green with white;
4. blue;
5. blue and white;
6. green;
7. brown with white;
8. brown.

The connection procedure is slightly different in the crossover version, for which the 568 A core arrangement is used.

Cross

This connection option uses the form 568 A and 568 V for low transmission speeds, namely, one of the sides of the wire is crimped according to the previous 8-wire method, but the orange and green pairs of the second are swapped. This results in the pinout of twisted pair 568;A:

1. green with white;
2. green;
3. orange and white;
4. blue;
5. blue and white;
6. orange;
7. brown with white;
8. brown.

If you need high traffic speed, the cable pinout for the Internet will be as follows: one side is crimped in the 568 V sequence, and the other side remains at 568 A, but with the “blue-brown” pairs replaced.

Procedure for crimping using a crimper

First, you need to strip the outer layer of insulation by about 2.5–3 cm. For such manipulation, there are special recesses on the crimper. In this case, you need to be very careful not to damage the insulation of the twisted pair wires.

Afterwards, you need to carefully straighten the wires, arranging them in the desired sequence, and cut them so that you get an even perpendicular edge. Next, follow the grooves inside the plug and insert the wires inside so that they fit into the contacts of the plug. The outer insulation of the wire must also go inside. Otherwise, after several bends, the connector will not hold up and the wires will break.

Afterwards, you can crimp the wire and the second fastening point with a crimper, which has a special groove for the 8P network cable. If the crimping is sufficient, the contacts pierce the core insulation. This action has two functions - it creates strong contact and additional fixation.

If the instructions are followed exactly, the twisted pair connector will function as intended. If something went wrong, the colors of the cores were mixed up, etc., it is for such a case that the supply of plugs mentioned above is needed.

Tool-free crimping

The procedure here is the same as in the previous method - the insulation is removed, arranged in the required order, the wires are cut, and inserted into the plug along the grooves. Afterwards, use a screwdriver to press down the part that secures the cable itself, and only after that can you proceed directly to the contacts themselves.

Using the same screwdriver (or scissors, whichever is more convenient), carefully, one by one, crimp the contacts until they pierce the insulation and rest tightly against the conductor cores. The contacts will remain recessed in the grooves of the plastic plug.

But still, of course, a connector crimped using a crimper, even the most budget one, will be of much higher quality. By the way, on new computers and laptops it no longer matters whether the connector is crimped directly or crosswise, because... these models themselves adapt to the pinout. Of course, this does not mean that you can perform such a procedure haphazardly. Simply, if necessary, connecting an Internet modem or another computer can be done by direct crimping a twisted pair or twisted pair 4 cores (at low traffic speeds).

Summarizing

As has probably become clear, the question of how to crimp a network cable is not so complicated, and anyone can do such work, even without special education. The main thing, as in any work, is attentiveness, accuracy and strict adherence to the instructions (images of various sawings are available above). Therefore, there is no point in calling a specialist, waiting for him and paying money for work that can be done with your own hands. But if you have doubts about your abilities, then, of course, you can entrust this matter to a professional, but it still won’t hurt to try to do the crimping yourself. After all, the costs for plugs are the smallest, and you can save a lot.

The problem arises, how to crimp the network cable? Of course, you can look for a ready-made crimped cable with connectors or ask a friend to help, but such options are not always suitable.

Moreover, sooner or later you will want to move the computer or do repairs and the cable will have to be changed or crimped again.

Often the need to crimp a network cable confuses an inexperienced person. And even if you have everything you need, you still can’t perform this procedure correctly. In fact, crimping a network cable is very simple.

Network cable. To build local networks, the so-called twisted pair cable is used. This is a cable that consists of eight conductors, which are combined into pairs. Each pair of conductors is twisted around each other. That's why this cable is called twisted pair.

Twisted pair cables are divided into categories from 1 to 7. The category is indicated directly on the cable (CAT1, CAT2, and so on up to CAT7). For a 100 Mbps LAN we need Category 5 or higher twisted pair cable. As a rule, twisted pair cable of category 5e is found on sale. Category 5e is an improved version of Category 5, so you can safely buy it. As for the purchase, you need to look for twisted pair cables in small computer stores or in markets with a variety of radio equipment and electronics. It is rarely found in large stores.

RJ-45 crimper (crimping tool). A crimper is a small device that looks a bit like pliers. Using this device, an RJ-45 connector is fixed to the network cable.

You need to look for the crimper in the same place as the network cable. Store salespeople do not always know the meaning of the word “crimper,” so you can simply say “a crimping tool for a network cable.”

Two RJ-45 connectors. We will also need two RJ-45 connectors. These connectors can be purchased in the same place as the cable and crimper.

As a rule, they are sold in packs of 100 pieces. If you buy individually, then take it with a reserve in case you spoil something and have to crimp the network cable with a new one.

Knife. You may also need a knife to remove the insulation. As a rule, the crimper has a special blade for stripping insulation from a twisted pair. But, without proper experience, it is quite difficult to use it, since it is very easy to damage the conductors inside the cable.

Let's start crimping the twisted pair

Step No. 1. Remove the external insulation. The first step is to remove about 3 centimeters of outer insulation from the network cable. This can be done using a knife or the crimper itself. As already mentioned, most crimpers have a special blade for stripping insulation.

After the insulation is removed, the cable consists of 4 pairs of twisted conductors and a separate nylon thread, which can be immediately cut off; we will not need it. There is no need to remove the insulation from the conductors, only the top layer of white insulation.

Step No. 2. Preparing conductors. Next you need to untangle all 4 pairs of conductors and carefully align them.

After the conductors are untangled and aligned, they need to be positioned according to the crimping diagram. There are two network cable crimping schemes: straight cable and crossover.

A direct crimping option is when the arrangement of conductors in the connector is the same at both ends of the cable. With cross crimping, different orders of conductors are used on different sides of the cable. To make it clearer, take a look at the illustration (below).

Previously, a crossover cable (or Crossover) was used to connect two hubs or two computers to each other. But now this option has lost its relevance because modern network equipment can change conductors automatically. Therefore, in most cases, the first crimping option (straight cable) is used.

After you have chosen the crimping method, you need to arrange the conductors in the appropriate order. In this case, the conductors should be as even as possible and located parallel to each other. The conductors arranged in order need to be shortened by about half. To do this, use a creamer blade.

Step No. 3. Put on the connector and crimp it with a crimper. After you have shortened the conductors, you need to carefully insert them into the RJ-45 connector. In this case, you need to ensure that the colors are not mixed up and that all conductors fit exactly into the holes allocated for them in the connector.

After the conductors have entered the connector, the twisted pair can be crimped. To do this, insert the connector with the cable into the creamer and squeeze the handles.

That's it, crimping the twisted pair on one side is complete. Now you need to perform similar steps for the second end of the cable. At the same time, do not forget in what order the conductors should go.

I hope this instruction will help you figure out how to crimp a network cable (twisted pair).

Recently, providers are increasingly using . This is a simple and reliable way to connect to the World Wide Web. What is especially important is that when using a local network, the user does not need to install any programs, drivers or additional equipment (such as an ADSL modem).

Your Internet cable needs to be connected to the WAN port (Internet port) of the router, and the compressed twisted pair cable to the regular LAN port of the router and to your computer. After simply setting up your router, you will be able to use the Internet as before.

Method No. 3. To extend the Internet cable, you can twist it.

The easiest way. All you need is a piece of twisted pair cable of the length you need. It is not difficult to purchase uncrimped twisted pair cables.

After this, you need to cut your Internet cable in any convenient place and wedge in the purchased piece of twisted pair. This is quite easy to do. In order to connect a twisted pair cable, you do not need to solder anything. All you need to do is expose the conductors and carefully twist the twisted pair according to the colors. Naturally, everything needs to be properly insulated using electrical tape. You can watch the video on how to twist twisted pair cables.

The order in which twisted pair wires are routed for RJ-45 connectors depends on the purpose of the connecting line, the technology and the data transmission standard. Below are figures for Ethernet local area networks for standards using copper cable - twisted pairs (Twisted Pair). The abbreviation of such standards usually looks like ##### - TX (for example, 10Base-TX, 100Base-TX) The number in the name of the standard indicates the carrier frequency of data transmission. Each standard uses special cable crimping schemes, uses different cables, and has specific restrictions on cable length and the number of connectors and switching devices.

Below is a relatively universal crimping method for 10Base-TX and 100Base-TX, only orange and green wires are involved (pins 1+2 and 3+6). The blue pair is often used for telephone lines (pins 4+5). For 1000Base-TX technologies and a number of other less popular ones, 8 contacts are used, and for Gigabit technologies I recommend using shielded twisted pair.

When crimping an RJ-45 cable, a special crimping tool is used - a crimper.

The untwisting of twisted pairs should be about 8-13mm. It is inconvenient to work with a braid that is too short. If it is too long, the connector will hold less securely. Remove the insulation from the cores first no need. When crimping with a crimper, the insulation will be pressed down automatically. When laying the cable, avoid sharp bends that can damage the wires.

Straight pair crimping order

It is used in “computer-switch” schemes, when the cable goes from the workstation to the switch, hub or router.

Cross-link (cross) order

Used in computer-to-computer circuits. Allows you to connect 2 hubs that do not have uplink/normal switching, as well as for direct connection 2 computers. 2 pairs change places: 1-2 to 3-6.

The following picture shows the crimping options. 4-core cable(Two pairs): straight and cross. Two pairs may be quite enough for our local networks, with a speed limit of 100 Mbit/s. If the equipment does not support speeds of more than 100 Mbit/s, then having 8 cores will not provide any advantages at all. Theoretically, 4 pairs of twisted pair cable provide speeds up to 1000 Mbps (1 Gb/s).

Modern network equipment supports Auto-MDIX technology, which allows you to use cables with both straight and cross-crimp.

Video of crimping RJ-45 connectors: