Cutting a twisted pair network cable for crimping is the first and most important step in crimping. The reliability of the connection of the conductors of the twisted-pair cable with the RJ45 plug, and, as a final result, the stability of access to the Internet, depends on the accuracy and correctness of its implementation.

The main thing when cutting is to prevent notching the conductors of twisted pairs and to exclude their overlap at the clamping point with a retainer in the RJ-45 plug. In crimping pliers for RJ-11, RJ-45 plugs, as a rule, there are special knives for cutting the twisted pair cable along the length and trimming its outer sheath. But I never use these functions of ticks, as I have repeatedly had to deal with the consequences of such pruning.

The fact is that a twisted-pair cable is far from an ideal circle, since all the pairs are twisted around each other, when cutting in pliers, the copper cores of the conductors are often notched and a few kinks are enough for them to break off. Reliability can only be guaranteed by manual preparation of the end of the cable for crimping.

Cutting the network cable begins with the removal of the outer sheath. To do this, one sponge of the side cutters is inserted into the cable. You need to make sure that cutting edge the conductors didn't get in. In most cables, a nylon cutting thread runs inside. After opening a couple of centimeters of the shell, you can take hold of it and cut the shell by 4-5 cm with an interference fit. Then the shell is bent to the side and cut off with side cutters. Many recommend stripping the jacket by 14 mm, but at this length it is practically impossible to develop and align the twisted pair conductors well.


Next, the twisted pairs themselves develop counterclockwise, usually they are twisted clockwise, if you look at the end of the cable. It is necessary to develop them in such a way that the pairs are in the same plane to the depth of the shell up to 5-8 mm. This condition must be observed in order to prevent the conductors from being crushed by the plug clamp when crimping with tongs. In this case, it is necessary to immediately orient the pairs by color, taking into account the color marking for crimping.


Twisted pair crimp color scheme Option B, the most common option.

The twisted-pair conductors are developed and straightened until they are in the same plane at the clamping point with the RJ plug retainer. The twisted pair conductors are shortened to a length of 14 mm, inserted into the RJ-11, RJ-45 plug. Be sure to check that all conductors are under the teeth of the contacts and their alternation matches the color marking. Sometimes at the moment of filling the reins into the fork, they change places. Conductors in color scheme B are located through one, white with colored stripes - colored. This allows you to quickly check that the wiring is correct at a glance.

How to crimp RJ-11, RJ-45 with pliers (crimper)

Crimping utp cables of computer twisted pairs in the RJ-11, RJ-45 plug is performed with a special crimping tool - pliers for crimping plugs. Professionals call such mites Crimper. By design, they are of two types, lever and press. Lever pincers (pictured left) are not expensive and work accordingly. A lot of force is required and the compression is obtained with a warp. The best are HT-500, in the right photo, they are devoid of the noted shortcomings. Their design is such that when twisted pairs are compressed, the comb sinking the contacts in the plug moves strictly perpendicular to the plug.


To crimp the network cable with tongs, it is necessary to cut and thread the twisted pairs into the plug, insert the RJ-11 or RJ-45 plug into the required cell of the tongs and bring their handles to the stop with your hands.


Press the latch of the RJ-11, RJ-45 plug to its body and remove the twisted-pair cable crimped with the RJ-45 plug ready for use from the pliers.

How to crimp RJ-11, RJ-45 without pliers

Sometimes it is necessary to urgently crimp the cable with an RJ-11 or RJ-45 plug, but there are no pliers at hand. In this case, you can do the crimping without a specialized tool manually. Insert the stripped twisted-pair conductors into the plug, in accordance with the required color scheme, clamp RJ in a vice by the latch, and using a bit from a screwdriver with a small hammer, tapping on the bit, deepen the lamellas to the desired depth. Snap the cable clamp onto the plug body.

The thickness of the blade of the bit should not exceed 0.55 mm, since the thickness of the lamella in the RJ forks is 0.56 mm. Otherwise, the insulating collars can be flattened. The spring-loaded contacts of the socket will cling to these places and there will be no contact. If, nevertheless, the sides are damaged, you need to cut off the hanging edges in the places of damage with the blade of a sharp knife.

How to re-crimp RJ-11, RJ-45

There are, it seemed at first glance, more impasse situations. Urgent need to press on network cable plug RJ-11 or RJ-45, and a new plug is not at hand. There is also a simple solution for this problem. It is necessary to clamp the fork body in a vice by the latch and pull the lamellas out of the seats by 1 mm, prying them alternately from the ends with an awl.


Use a knife to cut the latch from the near side to the cable, remove it and remove the old twisted pairs. I disassembled the RJ-45 plug completely to demonstrate its components.


Crimp new twisted pairs into the RJ-11 or RJ-45 plug using the technology described above.


Since the utp cable lock was removed when disassembling the plug, it is necessary to fix the cable in the plug by dropping a few drops of silicone, glue or sealant into the window formed from the removed latch. If it becomes necessary to lengthen or repair damage to a twisted pair cable, then this can be done by soldering or twisting. The reliability of a solder joint exceeds any mechanical methods.

The initial task of the provider is to install a modem / router and connect the consumer to the network. Usually installation work are held free of charge, however, in the future, the help of company representatives has to be paid.

In order not to make a call when connecting a new device, breaking down or creating an internal network, you need to learn how to compress an Internet cable at home. Consider the main methods and schemes for crimping wires with RJ-45 connectors.

Technique is constantly being improved, new devices connected to the Internet appear. If there are houses big piece network cable and a crimping tool, you do not have to purchase expensive patch cords or call a specialist every time.

The well-established cable manufacturing procedure takes no more than 5 minutes.

Here are a few situations where the ability to crimp comes in handy:

Image gallery

If you urgently need to prepare a project or complete thesis, and the cable has fallen into disrepair, sometimes only their own skills help out. Especially if the trouble happened late in the evening, when all the shops are closed, or you are far from the city.

It is impossible to foresee all situations related to twisted pair, therefore it is better to know in advance how the LAN cable is arranged and how it is crimped.

Materials and tools for work

To make a full-fledged and functioning patch cord with your own hands, you will need a piece of network cable, which is also called twisted pair, and connectors, in some cases - 1 connector.

You cannot build a patch cord with your bare hands, for this you need special crimping press tongs (crimper) and a stripper - a device for stripping insulation. Let's consider what they are.

Twisted pair internet cable

The name "twisted pair" is completely true. If you remove the insulating polymer from the cord, you will find 2 or 4 pairs of twisted spiral wires under it, which differ in color.

The diagram shows a standard twisted pair, which is used for self-crimping. 4 pairs of wires are hidden under the insulation, twisted in color: blue with white-blue, orange with white-orange, etc.

But you should not think that this is the only type of network cable. In fact, three options are actively used, each of which differs in the degree of protection:

  • UTP- a simple product in a polymer shell without shielding, suitable for constructing home networks and connecting devices to routers and switches;
  • FTP- cable, the sheath of which is reinforced with foil; shielding protects against external interference and helps if a power line passes nearby;
  • STP- a cable with two degrees of protection, in addition to a common foil sheath, each wire has a second, individual one.

The first option is the cheapest and most common. It makes sense to buy the second one if the Internet wires are laid in one strobe, cable channel or plinth with power communications.

The third, the most expensive and protected, is not used privately. It is applied on manufacturing enterprises, in large communication centers and other "serious" organizations.

Schematic representation of an FTP cable. If a conventional UTP cable is limited in length, otherwise the signal is lost, the product with double protection is pulled over a distance exceeding 100 m

All of the above options can be 1-core and multi-core. The former do not differ in good flexibility, but they hold the signal stably, they are more often used to connect electrical installations - Internet outlets.

The second, more elastic, is used for switchable cords, although it is more difficult to crimp them.

And one more quality that characterizes the throughput of wires is the category. It is usually indicated on the insulating layer.

Internet wire category table. For home communication networks, category 5 is used, that is, UTP Cat 5 and Cat 5e with data transfer rates up to 100 Mb / s and 1 Gb / s, respectively

Thus, if you plan to conduct Internet communications separately from the power line, the most inexpensive but dynamic option is suitable - UTP cat 5e.

Connector and its device

An Ethernet plug, which is inserted into the jacks of a PC, TVs, routers, communicators, sockets and other devices, is a connector. It has two commonly used names − RJ-45 And 8P8C. The device of the connector for the Internet seems simple if you know what its elements are needed for.

Connector design: 1 – case made of transparent plastic; 2 - fixing latch; 3 – cable entry; 4 - mounting crimping bar; 5 - channels for veins; 6 - contacts made of brass or bronze; 7 - knife protrusions

A brief description of the crimping process: the cores disassembled in a certain order are brought into the inlet and distributed along the channels, then the connector is inserted into a special socket of the press tongs and clamped.

What happens is that the clamping bar is lowered onto the outer insulation and firmly fixes the cable. Knife protrusions of the contacts cut the insulation of the cores, which ensures the electrical connection of the contacts with the conductors.

At the same time, the outer parts of the contacts are recessed into the housing - the result is a plug for switching with network device ports.

The cap, which is put on the network cable and connector, protects the connection and prevents it from “pulling off” when the cord is frequently switched from one socket to another

In addition to simple RJ-45 connectors, you can find products with a thin insert that guides the cores into the desired channels. For shielded communications, the same shielded plugs are intended - they can be recognized by the metal finish.

Twisted Pair Crimping Tool

If you want to thoroughly prepare for the crimping procedure and arm yourself with everything essential tool then get:

  • crimper (pliers);
  • stripper (nippers);
  • tester;
  • crossover device.

The stripper differs from a conventional construction knife in that it carefully removes the protective sheath from the wires, cutting only the polymer insulation and not damaging the wires.

The crimper can be both special and multifunctional. The second option, in addition to jacks for RJ-45 connectors, can also have telephone jacks RJ-11, RJ-12. Often these pliers have built-in cutting pliers.

A cable tester is needed to check the correct connection of the connectors and the serviceability of the line.

The presence of problems is reported by the red glow of the LEDs, if everything is fine with the connection of the conductors - green.

For convenience, you can purchase a tool kit - it will cost less than buying devices separately. In addition to the listed items, the kit may include screwdrivers, connector packages, a power probe, etc.

A crossover tool is not involved in the manufacture of a patch cord, it is necessary when you need to connect a network cable to a patch panel, plinth, socket or cross. Usually they are used by specialists when working with a distribution electrical panel. In fact, its presence is optional.

Overview of crimping patterns

The correct operation of the wire is ensured by a certain arrangement of cores in the connector. There are two main pinouts for an 8-core cable and another one for a 4-core cable that almost no one uses anymore.

If the switching device - a router or a switch - needs to be connected to a PC, laptop, monoblock, then a direct pinout is required. When switching directly two computers - cross (cross-over).

Both schemes have a digital designation:

  • straight- 568V;
  • cross over- 568A.

It is better to learn the location of the wires in both cases, since both schemes can be useful for home use to create an internal network.

Direct scheme. The wires in the process of crimping both connectors are arranged in the same way, as if in a mirror image. The order of the conductors and their color ratio are also important.

Wires cannot be swapped. If orange follows white-orange, then neither blue, nor green, nor any other should be connected - the cable will not work.

But there is one point - the orange and green wires are interchangeable, that is, under No. 1 there can be white-green, then green, and so on.

Cross scheme. More complex and requires memorization, since the conductors are connected not just in the opposite, but in special order, and the position of some remains "straight"

If suddenly, instead of the popular 8-core cable, you have to crimp a 4-core cable, which is used only for connecting peripheral devices, then a completely different circuit will be required.

When using the same connectors, the order of connecting the conductors changes.

Straight pinout for 4-core cable. The peculiarity of the connection is that some tracks remain free. Pins 1-3 and 6 are active, only orange and green wires work

The pin numbers are stamped on the connector, they must be taken into account when installing the wires. In order not to confuse with the arrangement, it is enough to find the number 1 or 8.

RJ-45 Proper Crimping Instructions

It is better to study the theoretical part even before you start crimping RJ-45 connectors with your own hands, so that later you do not have to redo it.

For training, you need to stock up on tools, patience and compress several Internet plugs. If the trial patch cord has worked, in the future you can easily cope with the manufacture of Internet cords.

Option #1 - Direct Connection Straight

This is the main procedure that should be worked out, since the connection of a stationary PC or laptop to a router occurs more often than other types of switching.

It is on this scheme that you can fill your hand - in other cases, you only have to swap the wires.

Image gallery

After the procedure, if the crimping is carried out correctly, the cores cannot even be pulled out of the connector with effort. The cable is held firmly inside thanks to the clip of the part covered with insulation.

After the first connector, we crimp the second one - according to the same direct connection scheme. The result should be a working cable desired length with two internet connectors at the ends

The operation was performed without the use of caps, if you decide to use them, then put them on the cable before starting to crimp. After crimping, pull the wide end of the cap onto the connector, the narrow one remains on the cable.

We use a tester to check the correctness. Connect the ends of the cord to different parts device. If the wires are crimped correctly, the green lights will light up alternately.

When an error is detected, the diode light will change from green to red. This may mean that the conductors are reversed in places, or somewhere there was an “unsuccess”.

Option #2 - Cross-Over Connection

If you decide to connect one computer to the router through another, that is, connect two personal devices directly, you will need a cross-over scheme.

It differs from the previous one only in the layout of the wires by color - the order of the conductors at the second end is not the same as at the first.

Image gallery

By the way, recent technical trends can lead to a complete rejection of such sophistications as a complex cross-connection scheme.

Already many modern digital devices are equipped with interface of the new standard Auto MDI-X. The system independently, automatically determines the type of connection and selects the switching mode that it considers optimal.

This means that it is enough to make a direct connection - then the technical device will do everything on its own.

Option #3 - four-core cable crimping

The main difference between the connection is that only 4 conductors out of 8 are involved in the process. The functional difference is in reducing the speed of the signal.

Image gallery

We remove the insulation by 1.5-2 cm, we separate only 4 working cores. In this case, these are green, white-green, orange, white-orange wires.

How to crimp a cable for a router that is connected with one connector to a PC and the second to the LAN port? If you read this review, you will understand how simple it really is. According to the standard, there are two options for crimping the cable, but now only one (the simplest) is used. And for networks operating according to the “100Mbit / s” (100Base-T) standard, in general, you can crimp not 8 wires, but 4. Examples are shown in the pictures, and there should be no problems with understanding.

It has been said that there are two different standards, that is, two methods of crimping power cords. Now relevant is one of them, which is called "direct". A cable that meets this standard is called a “patch cord” (there is also a “crossover”, but we do not consider this option). The name speaks for itself, a straight line is “simple” or “ordinary”, where the right and left plugs are crimped the same way:

Direct crimp method, patch cord

Note that the color of the insulation does not play a role - it is enough that the sequence on the first and second plug does not differ.

Typical mistakes made by installers

Let's see how a properly crimped LAN cable plug looks up close:

Pinout of the patch cord cable connector

Here all the wires are divided into pairs (first - fourth), the mating plug will look similar. What color the wires of the first pair, the second, and so on will be as a result - it does not matter if we are talking about a separate cable. The main thing is that on two plugs all pairs go in the same order. You can not change the order within each of the pairs.

Any patch cord includes three parts: a power cord, the first and second plug. When buying plastic connectors, that is, RJ-45 plugs, choose a part with eight tracks (sometimes 6 tracks):

RJ-45 connector and "telephone"

The RJ-45 standard provides for eight wires and contacts, and 6 contacts contains another connector (telephone). Externally, these connectors are very similar.

Divide the number of wires in half

Everything discussed above is related to the "1 Gb / s" (1000Base-T) standard. If you need a 100-megabit LAN, you can safely crimp 4 wires instead of eight. The first and second pair are used:

Pinout of the connector "100 Mbps"

Both plugs should look the same when viewed from below - as shown. Actually, we only excluded 4 “extra” conductors, but nothing else changes compared to the “1 Gb / s” patch cord.

The RJ-45 connector looks like this:

RJ-45 plug with pins

If the connector is placed with the top side towards you (and the bottom side towards the table), and then the contacts are directed upwards, then the numbering of the wires will go from left to right. Summarizing all the information, we can say that the plugs of a 100-megabit patch cord should look like this:

See how simple it is?

Now let's talk about what is better to use as a cable. We forgot to say that in general, connectors are shielded and without a shield, so the first ones must be used in conjunction with a shielded cable:

RJ-45 + shield, no shield

The classification of twisted pairs looks like this:

  • UTP-2 - 4 conductors twisted in 2 pairs
  • UTP-4 - 8 conductors (4 pairs)
  • FTP-4 - 8 conductors (4 pairs) + overall foil shield
  • STP-4 - 8 conductors (4 pairs, each in a separate shield).

Everything else is not suitable for our purposes, and if you still decide to use a shielded cord, take care to purchase suitable plugs. The "screen" usually has to be soldered, and patch cords, even with an FTP cable, are rare in practice. Everything looks logical here: if the distance does not exceed twenty meters, you don’t need any “screen” in principle.

We crimp the RJ-45 plug ourselves

The essence of the concept of "crimping" is very simple - we drive the insulated conductor into the connector with force, and then we clamp this conductor with contact teeth:

How to crimp an RJ-45 connector

When preparing the cable, consider the following requirements:

  1. At the first step, the length of the conductors protruding from the common insulation should be 25-30 mm.
  2. Having placed all the wires on the same plane, they are shortened with side cutters (the length of the protruding part should be 13-14 mm).
  3. The insulating tube must necessarily fit under the flat clamp, so that the protruding part of the wires does not need to be made too long.

We hope, guided by the tips given here, you will be able to crimp the connector the first time. In fact, professionals use a special tool (crimper), but if it is not available, they get by with a knife and a screwdriver.

The most difficult thing when performing the operation discussed here is to remove the outer insulating layer without hitting the conductors themselves.

It is interesting that on most so-called "crimpers" nothing is provided for working with external insulation. So, no one canceled the requirement for “straight hands”. Well, the “crimper” is needed so that after pressing the contacts they remain at the same level. This requirement can be fully met using a flat screwdriver (especially if you need to crimp 4 conductors). The proof of this statement is presented in the video.

We considered Ethernet standards, which involve the use of 4 or 8 cores in a cable. There is another standard, designated as 10Base-2, which refers to the connection of a coaxial cord with one central core. 10 Mbit / s is not enough, but wind up on coaxial cable a special connector (or twist it) can be done with just pliers. Probably, now few people remember about 10Base-2 Ethernet. Since RJ-45 sockets are installed on all routers, it means that you will have to keep up with the times and learn how to crimp an 8-core patch cord. Happy routing!

Crimp all cores with a screwdriver

In this article, we will analyze the crimping of a network cable. Many people one way or another encounter problems with patch cords (crimped twisted pair). Incorrect removal of plugs, incorrect cable routing, incorrect installation, this is far from full list problems that we can face when connecting the Internet in our home. The problem also lies in the fact that not everyone will be able to discern errors in the work of a third-party specialist. After reading this material, you will become confident with the crimper, learn the options for cable crimping schemes, learn how to crimp a twisted pair cable with a screwdriver. Next, we will analyze different types cables and common twisted-pair crimping errors.

Why it might be needed

There are a lot of options for using a twisted-pair cable, for almost any LAN connection or telephone pinout, you will need to crimp the cable at home.

  • Installing a local network at home. When connecting several computers to a home local network, you will need to connect computers / laptops to a router / router, this happens through the wire described above.
  • Internet connection. Although the main backbones of Internet connections are laid with a fiber optic connection, a twisted pair cable comes to the apartments. Therefore, it is very important to learn how to crimp it yourself, because such a common thing should be familiar to everyone.
  • Video surveillance is another common use for twisted-pair cable. This is not necessarily some kind of industrial installation of several dozen video cameras, a small webcam in front of the apartment door is quite enough, for which you will need the ability to use the crimper correctly.
  • Carrying out a telephone line. Strange as it may seem, at present telephone lines carried out with the same type of cable connection. So the skill will come in handy when laying a telephone transmission line.

What tools are required

  1. Crimper (“crimper”/”twisted tongs”). Tool for attaching connectors to the cable itself. One of the main tools for crimping Internet cable. Not a single set of tools for working with twisted pair can do without it.
  2. Stripper (“nippers”/”twisted knife”). A tool for stripping insulation, used in conjunction with a “crimper” (first of all, the insulation is removed with a “knife”, after that a connector is placed with a crimper). Often the “crimper” itself is equipped with a “knife”, but this is not always a high-quality tool and individual “nippers” are usually an order of magnitude better.
  3. Tool for crossover (“cross”). Not used directly in crimping, this tool is useful for making connections in switchboards and connecting twisted pair to network outlets.
  4. Cable tester (“Tester”). Diagnostic tool, serves to check the integrity and bandwidth, checking the wire crimping sequence.
  5. Cable connectors (“Fork” / “RJ” is called so because of the marking Rj 12, Rj 11, Rj 45 ...). A plug that is installed on a stripped wire and plugged into the network card connector of a computer / switch / hub / router / router.

Instructions for crimping a twisted pair with a screwdriver

IN critical situation You can also compress the Internet cable with the help of improvised tools (I want to warn you right away, all this is done at your own peril and risk). In order to do this we need.

  • Knife. To strip the wires, you will need something sharp, it does not have to be specialized, a clerical or ordinary well-sharpened kitchen knife will do.
  • Side cutters. To align the wires in a twisted-pair cable, side cutters are not necessarily needed; ordinary household scissors or pliers with wire cutters may also work.
  • Screwdriver. Actually with the help of which we will crimp the connector.
  • Twisted-pair cable (with a margin), RJ connectors (I also advise you to take it with a margin because it is not necessary to compress the cable in such a barbaric way).

The tool is ready, let's get down to business.

How to work with a crimper

It is much easier to crimp an Internet cable with a crimper. In this case, the main problem is not to confuse the order of connecting pairs of wires. There are a lot of color connection schemes, so listing and analyzing each one will take a very long time, I will present the main standard “T568A” (about 80% of connections will be made according to this standard).

Common Mistakes

Types of cables by type, bandwidth and shielding

  • Without any "UTP" escaping.
  • Shielding with copper mesh “STP”.
  • The foil acts as the “FTP” screen.
  • The shielding is copper mesh and aluminum foil “SFTP”.

The cores of the data cable are made of very thin metal wires. That is why they are easy to break with careless handling, by accident. In such situations, most likely, it will be necessary to crimp it again.

This process is not complicated, but has its own tricks and nuances. Also, for its implementation, special pliers will be needed, but their presence is not necessary - you can carry out the process using a conventional slotted screwdriver and a clerical knife.

Photo: twisted pair cable distribution and termination

Before proceeding with the crimping of the cable, it is imperative to prepare everything you need. And also make sure that you purchased exactly those connectors that are required in a particular case. Connectors are the most different types, RJ-45 type is usually required to connect the computer to the network.

Cable varieties

There are many various kinds cable used to create a network between different computers and network equipment.

Three types of communication cables are most common today:


Coaxial (coaxial) first began to be used to build local networks of various kinds.

Crimping this kind of Internet cable at home is quite simple; this does not even require a specialized tool - just an ordinary clerical knife and a screwdriver. This is where the benefits end.

This wire consists of three main parts:


The data transfer rate with this cable is only 10 Mbps. It is extremely susceptible to various kinds of electromagnetic pickups, repairing damage to this type of wire is very difficult and problematic. To date, it is practically not used anywhere.

Optic fiber is the most modern way for data transmission today.

It consists of the following components:


Optical fiber is not subject to any type of interference, the data transfer rate with its help is 2 Gbps. Distance between individual nodes that connects this species wire, can reach 100 km. There is only one drawback - the rather high cost.

Twisted Pair (twisted pair) - most often used both for building local networks and for connecting to the Internet.

It consists of the following components:


It can provide a relatively high data transfer rate - from 10 Mbps to 1 Gbps.

Twisted pair can be:


Twisted pair is little susceptible to various kinds of interference, it is easily repaired. Correctly crimping a wire for this type of Internet is quite simple, but a special tool is required - crimping.

Video: Twisted Pair Installation

Mounting diagrams

The twisted pair wiring diagram is the order of the wires by color. Another name is pinout.

The most commonly used today the following types pinouts:


The pins are numbered from left to right with the copper conductors on top and the connector itself facing the front of the user.

Each type of wiring diagram has its own purpose. Scheme of the first type STRAIGHT-THROUGHT(also marked as T568) is designed to connect the end equipment (personal PC, printer) with any switching equipment (router, hub).


Cross scheme (CrossOver) is used when there is a need to connect two instances network equipment- router, computer.

Straight-through

A straight wiring diagram called Straight-through can be implemented in two ways - there are two standards:


The first option is generally accepted, but there are situations in which only the second option can be implemented.

Color order when using 568 A:

Color № Color
white-green 1 white-green
green 2 green
yellow-white 3 yellow-white
blue 4
5 white-blue 5

white-blue
6 yellow 6
7 white-brown 7

white-brown
8 brown 8

brown

Color order when using 568 B:

Color №

Color
white-yellow 1 white-yellow
yellow 2 yellow
white-green 3 white-green
blue 4 blue
white-blue 5

white-blue
6 green 6
7 white-brown 7

white-brown
8 brown 8

brown

Cross-over

The Cross-Over scheme is more complex in terms of marking colors - their order is somewhat confusing.

There are also two standards, they differ depending on the network bandwidth:


The standard for a 100-megabit network has the following color order:

Number

 Color Number

Color
white-yellow 1 white-green
yellow 2 green
white-green 3 white-yellow
blue 4 blue
5 white-blue 5

white-blue
6 green 6
7 white-brown 7

white-brown
8 brown 8

brown

The standard of the second type - for a network with a transmission rate of this 1 Gb / s - requires the pinout of the wire as follows:

№1 №2
Number Color Number Color
1 white-yellow 1 white-green
2 yellow 2 green
3 white-green 3 white-yellow
4 blue 4 white-brown
5 white-blue 5 brown
6 green 6 yellow
7 white-brown 7 blue
8 brown 8 white-blue

Today, almost all network devices are able to recognize the connection method on their own (they have a feature called Auto-MDIX). But there are quite a large number of still in operation equipment that does not know how to do this.

How to compress the Internet cable with your own hands

Do-it-yourself pinout of the communication wire is quite simple. This will require only a few items, you can find and purchase them at the nearest computer store. You also need to know the parameters of your network equipment that you want to connect. Because the type of crimp (straight or cross) is selected depending on whether Auto-MDIX is supported.

Tools and accessories

To manually crimp a twisted pair of eight strands, you need the following tools:


Also, in addition to the tool itself, it is advisable to stock up on several connectors, in case the first attempt is unsuccessful.

Work order

The process itself is not difficult, it is only important to follow the procedure:


When all the above operations are completed, it is necessary to perform pressure testing. This can be done both with the help of special pliers, and with the help of a conventional slotted screwdriver.

Cable check

It is quite simple to check a compressed twisted pair with a multimeter set to continuity mode. It is necessary to connect the wires by color with contact probes - they should all ring well. If the sound signal is not heard, you should squeeze the connector contacts - they are loosely pressed against the copper conductors.

You can also check the connection using a special device. It checks the strength of the transmitted signal - accordingly, this device will make it easy to detect poor-quality pinouts.

When working with a twisted pair cable, you must follow some rules, they will make it possible to avoid communication problems in the future:


Crimping a twisted pair with pliers or even a slotted screwdriver is not a complicated process. It is only important to follow the technology and do everything as carefully as possible. Since a high-quality compressed twisted pair is a guarantee high speed data transmission. Therefore, before calling a specialist and paying him money, you should try to perform this simple operation yourself.

Today, multicore twisted pair is the most popular and reliable way to transmit information over the Internet or LAN.