RJ 45 coupling for twisted pair. Connecting twisted pairs to each other - extension and repair

for twisted pair connection via RJ-45 connectors

Sold individually for RUR 25 from 1 piece and for cash only.

Brief description and scopepasserbyRJ45-RJ45

Feed-through adapter (feed-through)8P8CRJ45-RJ45for unshielded twisted pairUTP cat5e.

Usedfor connecting two 8-core computer cables.With it you can easily and quicklyconnect the broken onecomputer or telephone lineor extend the existing cable. At the same time, the cable signal qualitywill remainpracticallyat the same level.

Unitedthe cables remain securely fixed, eliminating loss of contact. Thanks to the compact connectors, the adapter can easily fit anywhere and will not interfere with cable installation. The connection occurs through the 8P8C connector using an RJ-45 connector. The RJ series connector is used when laying computer and Internet networks based on twisted pair.

Feed-through adapterrefers to passive network equipment and is used indoors.

SpecificationspasserbyRJ45-RJ45

Material - plastic.

Color - white.

Compatible with RJ-45 and RJ-11 connectors.

I think many of us understand that connecting twisted pair cables to each other does not require high qualifications, but some nuances in this matter should still be taken into account. Restoring or extending twisted pair cables at home or in the office has to be done for various reasons. For example, you decided to move your computer to a new workplace, connect several computers into a local network, but your LAN cable is not long enough, or you accidentally crushed the twisted pair cable with a table leg, and now it needs to be repaired.

As you understand, there can be many reasons when a twisted pair connection becomes necessary. Of course, in such situations, nothing prevents you from turning to the services of a specialist, but if you are not averse to quickly eliminating the damage without resorting to outside help and want to connect the LAN cable yourself, then...

You can repair a damaged LAN cable or extend it by twisting or soldering wires of the same color to each other or through a special RJ-45 connector. Using twisting (telephone operator method), you can connect a twisted pair, maintaining the strength and operability of the line without a connector and RJ-45 (8P8C) connector.

But connecting a LAN cable using soldering or plug-in connections requires you to have experience and tools. In fact, splicing twisted pairs using these methods is not difficult, but you don’t always have a soldering iron, crimping pliers, and connectors at hand. Therefore, twisting twisted pair is an alternative method to these two, but even in this case you will need at least electrical tape and a knife. In general, I won’t spoil the article, but I’ll tell you everything in order.

Twisted pair connection, through a connector and connector.

In general, there are several types of connectors that are used depending on the technical characteristics of the twisted pair (read in detail here). In addition, there are varieties of connectors for connecting cables using an RJ-45 connector (8P8C) and without it. If you have a connector for RJ-45 connectors on hand, but don’t have special crimping pliers, then you can quickly and efficiently crimp a twisted pair cable without them. One of the previous publications also contains a detailed description of the method of crimping twisted pair cables using a screwdriver.

If possible, you can use a connection module to connect two pieces of twisted pair cable without RJ-45 connectors (shown in the figure above). You just need to plug the wires into it according to the color scheme applied. All these connectors are used during repair work to quickly restore, simply and reliably connect a damaged LAN cable. I believe that you should not have any questions when using such a module, but what to do if you don’t have any type of connector or RJ-45 connector at hand?

Connecting twisted pair wires by soldering.

This method is one of the most reliable ways to connect twisted pairs to each other, but it assumes that you have a soldering iron within reach, solder with flux inside or separately... If you have held a soldering iron in your hands, then you certainly know what successful soldering depends on, but for beginners This matter is sometimes not easy to understand. I will try to briefly outline the main points of soldering, but if my explanations are not enough for you, then visit some online resource dedicated to this matter.

First of all, open the outer sheath with the inner thread from one and the other section of the cable, wrap it and secure it temporarily with some kind of clamp or electrical tape. Cut the thread, unravel the pairs a few centimeters and straighten them, and then remove half the insulation from them. Side cutters/pliers or a knife are suitable for this.

For soldering to be successful, you need to follow several basic rules. The metal surface must be clean so that the solder adheres to it better, and it is better to hold the soldering iron at an angle of 30-45 degrees to the working surface. In this case, to the conductor.

Bring the soldering iron to the soldering area and heat the conductor for about 2-3 seconds, and then bring the solder (with flux inside) and apply the required amount. That is, at the soldering site, the soldering iron will melt the solder from which a little flux will flow out and leave the required amount at the soldering site. For clarity, I quickly soldered the conductors.

All that remains is to carefully and compactly lay out the conductors and isolate the soldering and stripping areas on them. During insulation, make sure that there are no sharp ends in the soldering areas that could pierce the applied insulation. Upon completion, cover the place of restoration/extension of the twisted pair with the outer sheath (cut if necessary) on one side and the other and secure, for example, with tape, so that this place is less noticeable.

If the connection/repair of the LAN cable will be carried out in places where it is exposed to dampness or some other external influences (rain...), then it is better to seal the outer shell hermetically. Perhaps connecting a twisted pair by soldering or a connector due to circumstances is not suitable for you, then use a simple and understandable twisting method.

Twisted pairs twisted together.

As in the previous method, you must first remove part of the outer insulation using an internal thread from one side and the other of the LAN cable. Unwind and align the conductors on one side and the other and carefully strip them of insulation halfway with pliers or a knife.

Now you need to twist all the wires together according to color. To do this, attach both pieces of wire to each other and begin twisting the wires from the base of the insulation. When finished, be sure to remove the sharp ends from each twist using pliers or side cutters. This method of twisting in the place where a break or extension is restored will give strength to all the cores in the twisted pair. Twisting copper conductors without insulation will lead to short-term durability and possible breakage of the conductors at the point of twisting during physical impact.

To make the twisting more or less accurate, you need to release the outer sheath of the cable from the clamps/insulating tape and pull both ends in different directions. This will expand the area for insulating and laying all conductors under the outer shell.

At the next stage, try to compactly lay and insulate all ends of the conductors. To do this, separate four pairs in different directions and begin to lay one pair at a time along the cable and wind another turn of electrical tape on top. Make sure that there is no contact between the stripped ends and other pairs when insulating. Do the same with the other four pairs on the reverse side.

To make the twist invisible to the eye, place the outer sheath of the cable on one side and the other over the twist so that they cover the junction of two sections of twisted pair. If necessary, trim the outer insulation of the cable. Finally, secure both ends of the outer insulation with tape or...

I already mentioned in the previous method that if the twist is exposed to external factors (snow, rain, dampness), then the top layer of cable insulation should be made more airtight. In general, there are certain types of twisted pair cables for outdoor installation. If desired, any of the methods can be improved and modified to suit your needs. It all depends on your ingenuity, and I just showed the principle of splicing twisted pair cables.

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 cable.

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.

Any Internet connection one way or another contains twisted pair cables in its physical design. It is through it that the information with which the user interacts is transmitted - messages, web pages or videos. This article will review RJ-45 twisted pair connectors, and also describe in detail the marking schemes, connection methods and standards.

Cable

A twisted pair consists of several pairs of copper conductors insulated from each other. Usually there are 8 pieces (or 4 pairs), less often - 4 (2 pairs). The color scheme is strictly standardized for all types of twisted pair cables. There is a limitation for this cable - when connecting, the distance cannot exceed 100 meters between two nodes. To increase this parameter, you need to review the network topology and distribute nodes differently or use special network hubs.

Twisted pair has several varieties:

• UTP. The most common. It consists of simple pairs of conductors in a plastic braid.
• F/UTP. All conductors are surrounded by one foil screen common to all.
• STP. In this form, each individual pair has its own protected braid and a common mesh screen.
• S/FTP. It has a copper screen, as well as each individual pair in its own foil winding.

twisted pair connector

To create reliable connections, connectors from the RJ series are used. This short abbreviation stands for Registered Jack. This translates to "registered connector". It was first created by Bell in 1975 with the goal of bringing the connectors used to a common denominator.

The entire series of these connectors is in one way or another related to connecting to networks. For example, a four-wire RJ9 is used to connect the handset to the device.

Used as a twisted-pair connector, RJ-45, by the way, is divided into two types - standard RJ-45 and RJ-45S. The first is used to create local networks, and the second is used to connect modems.

In fact, the term RJ-45, which has taken root in Russia, is called so erroneously, since it is similar in appearance to RJ-45S, which uses four wires. However, the name is firmly attached to the local network connector, so this abbreviation will also be used in this article.

Appearance

The housing of the RJ-45 twisted pair connector is made of a less common shielded version with a sheath of special metal. The new connector has eight legs inside, which are in a “charged” state. During crimping, they are pressed against the wires, “biting” into them and forming a reliable fastening and connection.

Crimping techniques

Each twisted pair cable has four colors. The pair has a conductor filled with a solid color and mixed with white. The palette is as follows - white-orange and orange, white-green and green, white-blue and blue, white-brown and brown.

Depending on the device connection parameters, different color options are used. That is, at one end of the cable there should be one pattern, at the other - another, or the same one, as will be shown below.

For example, when connecting a computer and a hub, the following color markings must be observed:

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

That is, color to color. And if you need to connect two computers or hubs, a special one is used, which is commonly called a “cross”:

As you can see, many colors have only slightly changed their location. The brown and blue pairs remained in their places, but the orange and green pairs changed.

By the way, many modern devices have learned to determine the placement of pairs automatically, which is undoubtedly convenient when creating large networks.

Pass-through connector

Sometimes during the operation of a local network, the surface of the cable may be damaged and it needs to be repaired in some way. For this purpose, there is a female-to-female RJ-45 twisted pair connector. It is a plastic case with two connectors, similar to those located on the system unit or laptop. To repair a damaged cable, you will need to crimp it at both ends according to the described color schemes. Then connect them to the female-to-female RJ-45 twisted pair connector. Quite a convenient and simple way to quickly restore the network without replacing the entire cable. By the way, there is a second name for this twisted pair connector - joyner. In fact, this is just a component that connects two similar types of connectors.

Krone connector type

Krone is a company that set the tone and created its own type of connector with the same name. This term is mainly used to refer to sockets with a special connection mechanism. Although the company's catalog also includes a set of Krone twisted pair connectors.

Twisted Pair Crimping Tool

To build local networks, special devices and tools are used. In particular, a crimper is used to work with a twisted pair cable connector. In common parlance it may also be referred to simply as “crimping” or “crimping.”

This tool looks like pliers. One end of them is fixed. The second one consists of handles for performing force. Between them there may be several seats for connectors, depending on the design. Also included is sometimes a special blade for cutting and stripping wires.

After crimping the cable, it becomes necessary to quickly check whether the wires are positioned correctly. There is a special type of tool for this - special testers that allow you to find out in real time about the presence of a contact.

Crimping process

To connect the network connection you will need: a twisted pair cable connector cat. 5e or any other, the cable itself is of the required length and a crimper.

Depending on the purpose of the connection, you must first select a color scheme. Then you need to take care to remove the insulation. To do this, there is a special place on the “crimp” for this procedure in the form of a hole. The cable is inserted into it, clamped and rotated in a circle. Only couples should remain. Now they need to be manually unwoven on each side and assembled in accordance with the color scheme.

Using a knife on the tool, you need to trim off the excess wires, down to about one centimeter. Now it's time for the connector. It is most convenient to hold it with the latch facing up. You need to insert the pairs into special grooves until they stop. At this point, you should make sure that the color scheme matches the required one.

When everything is ready, the wires are in the connector and placed correctly, it is time to make the crimp. To do this, it is installed in the seat of the crimper and the handles are compressed with force. In this case, the copper contacts will cut into the wires and form a reliable connection.

This procedure must be carried out at both ends of the cable.

What to do if you don’t have a special tool at hand?

It is not profitable to buy an expensive crimper just for one or two crimps. But in situations where you urgently need to connect the cable, there is a way out. To do this you will need a simple screwdriver.

As with the crimper, you first need to decide on a color scheme and also use a knife to strip the cable. By analogy, wires are inserted into a connector.

Now you need to use a screwdriver to press firmly and, most importantly, gently on the contacts. As a result, they should be slightly recessed relative to the body. The last thing to carefully press in is the plastic cable clamp. This method may not work the first time. In addition, the contacts may not be pressed completely, but if there is no other way out, then you will have to practice until you successfully crimp.

It is worth noting that the industry does not stand still, and there are already twisted pair connectors on the market that do not require special tools. They look like a regular connector with two drop-down panels. Below them are sockets into which the wires are inserted. Once snapped into place, the connector will automatically crimp. A fun and easy way to create a network without tools. The only thing you need to do is manually remove the braid.

Conclusion

In the world of twisted pair connectors or connectors, there are many different solutions. Some are universal, others are strictly defined by standards. In any case, their main purpose is to create a stable connection between the cable and the connector.

Despite the widespread use of wireless networks, twisted pair connectors are still relevant to this day. After all, you still need to connect the Internet to the router somehow. Therefore, twisted pair and all its additional elements will remain in trend for a long time.