There are several ways to connect personal computers to a network: via a USB interface, via an Ethernet interface, using a fiber optic cable, using Wi-Fi or Bluetooth. This article will present the features of communication when connecting computers using these standards.
USB interface
USB ports simultaneously supply power to connected devices and transfer data. The USB 2.0 cable combines four wires, of which two are for power and two more for information exchange; the data transfer rate depends on the operating modes, the most productive of which is High-speed (up to 480 Mbps). USB 3.0 specification cables already contain 10 wires, but more new standard physically and functionally compatible with the previous version of the standard (distinguishing external feature USB 3.0 has become its connector of blue color). Along with an increase in current from 500 mA to 900 mA, compared to USB 2.0, version 3 increases the maximum transfer rate to 5 Gb / s, thus increasing the file transfer speed from a maximum of 60 MB / s to 600 MB / s, and this, in turn, allows you to send 1 TB of data not in as much as 8-10 hours, but in just 40-60 minutes. However, it should be borne in mind that the transfer rate directly depends on the quality of the cable, support for the relevant specifications at the level of the computer motherboard, operating system, CPU, volume random access memory, and this applies to all devices connected to the network. There are also restrictions on the length of the cable: for USB 2.0 - 5 meters, for 3.0 - 3 meters. Devices are networked directly (two computers) or via a USB hub (more than two computers) - please note that the total speed, for example 60 MB / s in the case of c USB 2.0, will be evenly distributed among all devices connected via a USB hub to the USB controller of the computer motherboard).
Ethernet interface
This is a specially designed communication standard, the most common way to connect computers to a network using Ethernet cables. The most common Ethernet cables come with straight (straight), inverted (roll over) and cross (cross over) connections. Cables with straight connections are designed to connect a computer to a switch (hub), cables with inverted connections are used to communicate between switches, and cables with crossed connections are used to connect two computers directly. Reverse cables are also used to connect computers to router console ports. Here, when combining more than two computers into a network, everything depends only on the number of switch ports (the maximum number of network computers) and the bandwidth of the network card on each of the computers. The most common network cards today (including those built into motherboards solutions) support file transfer rates up to 1 Gbps.
Personal area network (PAN) via Bluetooth
Bluetooth PAN is a technology that is used to create a network connection between mobile computers via wireless communication. Up to eight computers, smartphones, PDAs, and the like can be connected to this network. At the same time, a laptop equipped with a built-in Bluetooth system can be connected to a computer to which a Bluetooth adapter is connected (via USB port). The speed of such a connection will fluctuate in the range of 1-3 Mbps, given that the connected devices are equipped with modules of at least Bluetoth 2.0, and preferably Bluetoth 2.1 + EDR. Bluetooth pairing, although not a high-speed option, does provide some interesting communication features that are part of the Bluetooth protocol stack, such as LMP (radio connection control between two devices), AVRCP (audio stream control over Bluetooth), RFCOMM (emulation of control signals RS-232) and others. The use of these specifications makes it possible to significantly expand the range of use of devices, for example, to turn one of them into a control panel for another.
Wireless network
Wireless communication is also possible through the IEEE Wireless 802.11b/g/n protocol, which is called Wi-Fi or wireless Ethernet. This is perhaps the most progressive way to create networks in our time. Computers equipped with wireless network modules can communicate with other devices that support Wi-Fi through wireless routers. Wireless router in this case acts as a switch (as when connected via an Ethernet interface), only without cables. Setting up and connecting computers in this way is generally similar to those when creating a network of computers via an Ethernet interface, and the connection itself is also high-speed - up to 600 Mbps for 802.11n (theoretically), but in practice, without additional settings, a channel is often used approximately 60 Mbps. Among the few disadvantages of this type of networks, one should note their electromagnetic sensitivity to devices that also operate at a frequency of 2.4 GHz (for example, to microwave ovens), which leads to a deterioration in the quality of communication between devices. You also need to know that in Russian Federation points wireless access to the network and Wi-Fi adapters with an EIRP value exceeding 100 mW (20 dBm) must be registered.
fiber optic cable
Contains several glass fibers that allow information to be transmitted at the speed of light. Such cables have a much greater bandwidth than conventional Ethernet cables and are characterized by speeds measured in gigabytes (!) per second. The signals that are transmitted over fiber optic cables do not need to be regenerated and are very resistant to electromagnetic signals that occur near various power cables, electric motors and other sources of electromagnetic interference. FTTH, fiber optic communication technology in the home, has become accepted standard precisely because of the highest Internet connection speed to date - 100 Mb / s or more.
How to crimp an RJ-45 network cable with and without special tools.
Let's start with the basics: An RJ-45 cable is a conductor that includes eight copperlived (wiring). These wires are twisted together, and therefore such a cable is often called a twisted pair.
Now consider connecting a computer to the Internet via a modem. To do this, you need a computer, a modem and a patch cord. Let's say you have a computer and a modem, you can not buy a ready-made patch cord, but make it yourself by following the steps below.
What you need to crimp the network cable:
- Twisted pair cable (length 1.5 meters is usually enough, maximum length 200 meters);
- Connectors (plugs) RJ-45 and caps (take one more);
- Crimper - a tool for crimping;
- Masking tape (useful for labeling cables, you can write with a marker, pen or pencil).
First remove the top insulating layer at both ends of the cable, using the knife contained on the crimping tool. It will be sufficient to remove 15-20 millimeters of insulation, while focusing on the fact that the removal of the general insulation does not entail damage to the core insulation.
After separating the insulation from both ends of the cable, you need to unwind the cores and straighten the wiring.
It should be noted that the cable is crimped in one of two ways:
- Straight crimp - suitable for connection personal computer to a local network or to the Internet.
- Cross crimp - for cases when you need to connect two computers together.
Memo to a smartphone: how to crimp a network cable with an RG-45 connector.
After straightening the wires and positioning them as necessary, it is recommended, using a knife on the crimper, to cut 1-2 millimeters from the ends of the wires to make the edge of the strands even.
To crimp the RJ-45 cable, we choose, for example, the first method (direct), for which you need two plugs and a cap. Caps are an optional attribute, but it is strongly recommended to use them, because they increase the strength in those places where the twisted pair connects to the connector, plus the patch cord with caps looks much neater and more beautiful. Caps are put on before crimping the connector. When the caps are on the cable, you can connect the cable and connector.
When connecting the cable to the connector, you need to make sure that the cores of the wires do not cross, and two wires are not inserted into the same socket. It often happens that at the beginning of the wiring they easily enter the connector, and at the points of the contact itself (in the socket of the connector) they are twisted, violating the crimping scheme.
Having carefully checked the location of the wires in the connector after inserting them all the way, you can start crimping the twisted pair. We take a crimping tool (crimper) in one hand, and with the other hand, holding the connector and twisted pair, put the plug into the special connector of the crimping tool. After that, we gently compress the crimping tool, which will lead to the shift of the contacts to the desired position and, subsequently, to their strong connection with the cores. Similar actions are made with the other end of the twisted pair. After the cable is crimped, caps are put on the connectors.
The resulting network cable is the same patch cord.
Checking the network cable with a tester
The next step is to check if the connection is correct and working. finished product in general with a LAN tester . We connect the connectors to the tester and turn on the device. The absence of connection errors by the direct crimping method will be indicated by the behavior of the indicators on the tester in the form of a running fire. More precisely, the signal will be sequentially transmitted from one contact to another, and the tester's indicators will light up one after another in turn.
If, while testing the patch cord, it is found that some of the indicators do not light up, then this means that certain wires do not fit snugly in the socket. In this case, it is recommended to re-crimp the cable, because the vast majority of such problems arise precisely because the contacts are not crimped enough. If the above steps did not help, the cable is crimped with another plug.
You can crimp the RJ-45 cable without a crimper tool
The most critical part of this process is fixing the wires in the tip. This is done with a flat screwdriver, pushing in the latch of each of the grooves. The difficulty lies in the fact that excessive force leads to breakage of the plug, and insufficient pressure ends in the wires falling out of it. Having fixed the wiring in the tip, you should provide a special opening at the base of the plug plastic insert. If at the very beginning of work the distance of the removed outer insulation is chosen correctly, then the cable located under the insertion hole will contain a sheath. The insert is also necessarily pressed in with a flat screwdriver in order to fix the installed connector on the outer braid of the twisted pair.
As a rule, this problem is most often encountered by Internet users. One of the common reasons for the lack of access to the World Wide Web is inaccurate line switching, when cables literally lie under computer desk and systematically break off at the points of attachment.
Although it is often necessary to change its tracing, while increasing the length. For example, when changing the position of a PC or telephone in a home. In any case, you cannot do without reinstalling (or attaching a new one) the RJ-45 connector. Let's figure out how and with what at home you can compress a network cable with an RJ-45 connector.
The RJ-45 connector is often referred to as "8p8c". It is deciphered simply - in this connector there are 8 contacts and inserts (the so-called knives). There are several modifications of this switching element. Depending on the design features the specifics of its application also differ. RJ-45 with 3 protrusions are considered universal. They are used for crimping both single and stranded cables, which is why all patch cords are made with their help. The connector diagram is shown in the figure.
Required Tool
In fact, all you need is a special tool for crimping RJ-45 cables - a crimper.
It is inexpensive (within 638 - 689 rubles), and in order not to constantly call the master, it is advisable to purchase, although the crimper does not belong to the class household tool. In any house there are many places for connecting lines (telephone, computer), which are organized using RJ-45, and this device will definitely be needed again, and more than once.
sharpened cutting tool. As a rule, a scalpel is used to prepare the cable for crimping. They work much more conveniently than with a knife. Yes, and cutting the conductor is more accurate.
Before starting the crimping process, you should make sure that the RJ-45 is suitable for the type of cable you have. Although you should think about this when choosing a connector in a store.
Network cable crimping technology
Twisted pair (network cable) is sold in coils. Therefore, it is necessary to lay the cable around the room according to the selected (drawn up) scheme and cut it to length, taking into account a small margin.
The outer insulation layer is removed (by 2.5 ± 0.5 cm) at the end of the cable that is supposed to be crimped. Or a scalpel, or a miniature knife (there is on the crimper itself). It is necessary to carry out the work so that the coating of the cores themselves is not damaged. That is why those who do not have sufficient experience in this area are advised to cut the twisted pair cable, leaving some margin in length. The explanation is simple - it is not a fact that this operation will be accurately performed the first time.
The veins are untwisted and straightened. If their tips do not line up, they can be bitten off (with side cutters, one and a half millimeters). Otherwise, it will not be possible to arrange them correctly in RJ-45. The standard by which the connection to the network is made is also taken into account.
Crimp directly. There are two methods - direct and cross (oblique). The first method is implemented when connecting a PC to the Internet line. The second - when creating a local network, that is, when connecting two computers.
Feature of the operation
- When laying conductors in RJ-45, the cores should not cross, and even more so, they should not go in pairs in 1 connector socket - only one at a time. This is typical of their tips, which can twist as they are pressed into the connector housing.
- Before proceeding with crimping, it is recommended to check the wiring diagram again. That is, to carry out a control inspection, since it will be impossible to redo something later.
- Installation of the crimper at the place of cable crimping. Then it's easy - to squeeze the handles of the tool. The main thing is not to overdo it.
Line performance check. In practice, this is done by connecting a cable to a PC. The result will be clear immediately.
If a patch cord is made (with rj-45 at both ends of a piece of cable), then it will be necessary, for lack of a special test device,. To do this, its probes should be sharpened so that they can ensure tight contact with the miniature connector lamellae. Next - dialing for each conductor. If everything is in order, you can connect both PCs to each other.
In principle, there is nothing complicated in crimping cables. If there is a crimper, then installing one RJ-45 takes a few minutes.
According to the EIA / TIA-568 specification, there are several color schemes for crimping a twisted pair network cable (patch cord) into an RJ-45 connector for connecting a computer to a router, hub, switch, or connecting two computers to each other.
The network plug is usually called RJ-45, although its correct name is 8P8C. And RJ (Registered Jack) is the name of a standard that describes the design of a plug-in connection between a plug and a socket.
All the photographs below show one split utp cable designed for use in LAN (Local Area Network) and DSL (Digital Subscriber Line) networks, with twisted pairs crimped at its ends into RJ-45 plugs.
RJ-45 crimping color scheme computer - hub for the Internet
option B, the most common option.
Twisted pair lan cable crimp color code by option A.
As you can see in the photo, in both versions, the ends of the lan cable are crimped according to the same electrical circuit, only two twisted pairs are swapped. A green twisted pair is crimped in place of the orange twisted pair, and orange is crimped in place of the green twisted pair.
Twisted pairs of utp cables, crimped both in option A and option B, interchangeable. So you can compress according to any color scheme option that you like best, this will not affect the performance of the lan network.
Color scheme for crimping RJ-45 two-pair twisted-pair cable
Currently, a twisted pair network cable has appeared on sale, in which instead of the traditional four there are only two twisted pairs. And this is economically justified, since in 90% cable lines only two twisted pairs are used for the Internet.
As you can see circuit diagram the connection of the RJ-45 pins has not changed, only the blue one is crimped instead of the green pair.
Such a twisted-pair cable according to option B is crimped according to the scheme shown above in the photo. When crimping option A, the pairs are simply swapped. Instead of an orange pair, a blue one is crimped, and instead of a blue one, an orange one.
RJ-45 crimping color scheme Computer - computer
If you need to create a local lan network of two or more computers without using additional active equipment (hub, switch or router), for example, for group games, then for this case the EIA / TIA specification provides for the following twisted-pair network cable cutting. To create a network of two computers, it is enough to insert one such twisted-pair cable into their network ports.
Please note that the opposite ends of the computer-to-computer twisted-pair lan cable are crimped according to different color schemes.
RJ-45 twisted pairs are crimped with a tool called a crimping tool. If there are no pliers at hand, then you can use twisted pair crimping technology without pliers.
All of the above color schemes for utp twisted pair cable pinouts are currently out of date. Modern network cards, switches, hubs and routers, thanks to the support of Auto-MDIX technology, automatically determine the twisted-pair cable crimping option and perform internal adjustments. So a modern computer, when creating a network, can be connected at least to a hub, or to another computer without thinking about the color scheme for twisted pair cable pinouts.
RJ-45 crimp color scheme
PoE IEEE 802.3af and IEEE 802.3at
The PoE IEEE 802.3af standard provides for the possibility of transmitting an information signal and supplying power to the device over a single twisted pair cable crimped with an RJ-45 connector. This eliminates the need for an additional wire for supplying voltage.
Regardless of the RJ-45 crimping options, from the positive output of the power supply, voltage is applied simultaneously to pins 4 and 5 (blue pair), and the negative output to pins 7 and 8 (brown pair).
As a rule, twisted-pair cable pinout according to the PoE IEEE 802.3af standard is used when creating video surveillance systems that use a switch, for example, a 9-port PoE switch ROKA R-KM-POE0801, in which each port has the ability to feed through RJ-45 DC voltage 12 V power up to 30 W.
RJ-45 Crimp Color Scheme 4 Wires for Internet
When connecting a computer to the Internet or creating a local network, rarely does anyone use the full capabilities of a twisted-pair lan cable. This is usually due to a lack of information.
When transmitting a signal over twisted pairs of a CAT5 cable (speed up to 100 Mbps), only two pairs of wires out of the four available in the cable are involved. One pair for signal reception, the second for transmission, which is clearly demonstrated by the above electrical diagram of connecting a computer network card with a twisted pair cable with an RJ-45 connector to a switch hub or router.
As can be seen from the diagram, each of the two pairs of lan cables is connected to a computer and a switch hub or router using a transformer symmetrical circuit. The advantage of the transformer circuit is the suppression of interference and interference and provide a high degree of protection against short circuits and errors when installed in a twisted pair cable.
In case of need for laying additional line or if the pairs in the twisted pair network cable are partially damaged, it is possible, without degrading the data transfer rate, to double the number of lines or repair the twisted pair cable by crimping the RJ-45 plugs to previously unused twisted pairs.
The RJ-45 twisted pair cable crimp color schemes below are the same as above, but they only show the lan conductors of the twisted pair cable that are used to transmit information. Twisted pairs that do not fit close to the RJ45 plug are usually crimped, but the signal is not transmitted over them and they can be used to transmit additional information.
RJ-45 crimping color scheme 4 wires computer hub
Twisted-pair crimping, option B. The signal is transmitted only on orange and green pairs.
Twisted pair crimping, option A. The signal is also transmitted only over green and orange pairs, but the twisted pairs are crimped in the RJ-45 plug to other contacts.
RJ-45 crimping color scheme 4 wires computer - computer
Crimping twisted pair computer-to-computer. The signal is transmitted only on green and orange pairs.
Color scheme of crimping RJ-45 computer - hub during repair
What is the difference between a patch cord and a twisted pair cable
A patch cord, or as it is also called a patch cord, is designed to connect electronic devices to each other, for example, a computer with a hub, a switch, or two computers to each other if the devices need to be moved relative to each other during operation.
For the manufacture of a patch cord, a twisted pair cable is taken, the cores in which are made of stranded wire so that they do not break with frequent bending. For crimping such a cable, special RJ-45 connectors are used. According to the ANSI EIA TIA 568B.1 standard, the length of the patch cord must not exceed five meters. Connecting devices using a patch cord is economically feasible if they often move relative to each other during operation.
Despite the development of wireless data transmission technologies, the classic wired network does not lose its relevance - largely due to its stability and high speed. In the process of creating such a network, it may be necessary to properly crimp the RJ-45 cables. How to do it - in this article.
- actually, the cable itself, and the fifth category. The most common type, so with a high degree of probability you have just that - there would be eight veins;
- crimper. A special tool that looks like ordinary pliers. Needed to secure the connectors at the ends of the cable, or simply - for crimping;
Note! The crimper is expensive, and if you need to crimp, you can do without it - a regular kitchen knife and a flat-head screwdriver.
- two RJ-45 connectors. We need two - one for each end of the wire, but it is still recommended to take four. The product is cheap, and in case something goes wrong, there is always a fallback option;
- stripper. Tool for stripping protective insulation from wires. Not so much needed, since most crimpers have the right blade. If there is no such tool, it is quite possible to live;
- cable tester. A useful thing that rarely anyone has, is expensive and very few are sold anywhere. Usually, the wire after crimping is checked by connecting to a switch or computer, that is, to the place where it is intended. But this method has serious drawbacks: it is not always possible to identify a malfunction, and it is not clear where to look for it. The tester also shows in which wire there is an open or short circuit. Comfortable.
Decide on a goal
For what purpose do you need the cable that you are going to crimp? In general, a lot depends on the answer to this question: there are several standards for the location of twisted pair wires in the connector, and each type implies use only in certain situations.
So let's look at these types:
- straight cable - usually such cables connect the computer to a switching device, for example, a router or a switch. One of the most common types of cable;
- crossover cable, also commonly called a crossover, is a different type of twisted-pair crimping, used mainly to create computer-to-computer wired networks without the use of routers.
Each of these standards has its subspecies. So, a direct connection has two standards: T568A and T568B (see figure). Here are the crimping schemes for both standards, however, it should be remembered that it is the second that is most common.
With a crossover cable, everything is somewhat simpler - it is not divided into subspecies, its only crimping scheme is as follows.
Note! Thus, there are a total of three twisted-pair cable crimping options. If you have decided which one you need to use in your particular case, then we move on to next step of our work - to the crimp itself.
Crimping the cable
First of all, make sure that your crimper has blades for cutting and stripping the cable. If there are none, stock up on a stripper or at least a clerical knife:
- Cut the wire near its end. The cut must be perpendicular. Pay attention to the fact that all eight strands of the wire are the same length - otherwise there is a risk of making a non-working cable.
- Now step back about two centimeters from the end and, using a special (or not very) tool, cut off the outer insulation so that the cores are released and can move freely in space. Don't overdo it!
- Try plugging the wires into the connector. If the outer insulation does not reach the connector, the cores should be shortened somewhat: such a design may lead to chafing of the cable in the future.
Note! Stripping the veins themselves, contrary to popular belief, is absolutely not necessary. It is much more necessary to take care that their length along the entire connector is uniform.
- Distribute the sequence of strands in the connector as the connection standard of your choice implies.
- Now place the connector in the crimper, in the hole labeled "8P". Start squeezing the crimper handles until you hear a distinctive click.
- After that, you should remove the cable and check the strength of the resulting connection. To do this, simply grab the connector and the cable itself and pull in different directions. Doesn't fly? Did the wires get mixed up during the crimping process? Then you can move on to the other end of your cable. Repeat all the above steps.
It differs a little: you also need to strip the outer insulation, place the cores in the connector and crimp them. However, for crimping, we will not use a crimper (because we don’t have one), but an ordinary thin flat screwdriver or a kitchen knife. Place the slot of the screwdriver on the metal pad of the outer contacts of the connector and gently, without much effort, start pushing the contact pad inward. And so with each of the eight lived.
This method is somewhat longer, but in an emergency it is quite suitable.
Checking the crimped cable
So, now that we have both ends of the cable crimped, it's time to check our creation for performance. For this:
When you finally achieve a successful connection, you can safely use the resulting wire for its intended purpose. Ready!
Video - How to crimp a twisted-pair Internet cable
If suddenly the question arose about the organization home network or simply by connecting the computer to a router, modem or other device, and there is no way to call the wizard, you should not be upset. In computer stores, you can freely buy ready-made cables (patch cords) with various types connectors already connected. If there is no such store nearby, or you need to lay the cable in places where the connectors will not pass, you will have to crimp the cable yourself.
This will require basic knowledge in the field of electronics, as well as certain type cable, connectors, tools for crimping, tester, screwdriver and knife. But before proceeding with the installation, let's try to figure out what is intended for what, how it works, how to compress it yourself.
Cable
In standard local networks It is customary to use a conductor called "twisted pair". He owes his name internal device, consisting of two, four or eight insulated copper or aluminum conductors, twisted in pairs and enclosed in an external PVC insulation. The shell of each wiring for ease of connection is made in different colors. There are two types such as surrounding foil (FTP) and unshielded (UTP).
It is not advisable to use an FTP explorer for arranging a home network, since the screen is designed to protect against strong electromagnetic interference, as well as to working length cables over 100 meters. So a cheaper and more common option in the form of a UTP cable, sold in any computer hardware store or on the market, is quite suitable. Any "twisted pair" is divided into several categories depending on the number of cores, throughput and purpose. The cable is marked with a combination of letters and numbers: from CAT-1 to CAT-7. The most common conductor for LAN equipment is CAT-5 or its modification CAT5e. It consists of four pairs of multi-colored cores and provides up to 100 Mbps at a frequency of 100 MHz.
Connectors
All modern computer technology, intended for wide use, for network connections has standard standard connectors for a plug marked 8P8C. Sometimes such a connector is called RJ-45 for some reason. But no matter how they are called, they have one purpose - to connect the "twisted pair" with any device. These plugs, like the cable, may or may not be shielded. The connector is a plastic head with eight grooves cut into it for laying conductor strands. At the end of these slots, movable contacts are installed, which clamp the wires. During installation, the numbering of the grooves is very important. If the connector is placed with the contacts up and the latch towards you, then the first contact will be on the left, and the eighth contact on the right.
There are two options for the location of the cores of the "twisted pair" in the connectors:
- EIA/TIA-568A.
- EIA/TIA-568B.
The first provides for the following sequence (from left to right):
- White-green.
- Green.
- White-orange.
- Blue.
- White blue.
- Orange.
- White-brown.
- Brown.
In the second circuit, the wires are arranged as follows:
- White-orange.
- Orange.
- White-green.
- Blue.
- White blue.
- Green.
- White-brown.
- Brown.
Connection types
The EIA / TIA-568A option is used to crimp a network cable, which will be connected at one end to a computer, and at the other - to one of the switching devices (router, switch, modem, etc.). This type of connection is called direct. But there is another - cross or cross. It is used to connect two computers directly. Direct crimping of the network cable provides for the fastening of connectors according to the EIA / TIA-568A scheme at both ends. This is the most common type of connection, since usually more than two computers are used in local networks, connected via a switch or other types of switches. If, nevertheless, it became necessary to connect two machines to each other, then a cross connection is used. In order to crimp the computer-to-computer network cable, one end of the cable should be connected to the connector using the EIA / TIA-568A technology, and the other - using the EIA / TIA-568B technology. For direct connection, not all 8 cores can be used, but only 4, however, this will decrease by 10 times. When cross-connected, all 8 cores are used.
Cable preparation
Before crimping, the conductor must be stripped of insulation. You can cut the cable with an ordinary knife, but the performance of our patch cord and the quality of data transfer will depend on how carefully this is done. The outer insulation is cut at a distance of 20-25 mm from the end. It is important not to damage the insulation of the cores, which can subsequently lead to their short circuit. After the insulation is removed, it is necessary to untwist all pairs and straighten them in the order of EIA / TIA-568A or EIA / TIA-568B, depending on required type connections.
How to crimp a network cable with a crimper
Masters use special pliers (crimper) for. If such a tool was not found at home, you can buy it at any store that sells radio components. The cost of the simplest crimper is about 200 rubles. Before crimping the network cable, you need to make sure that the cores do not intersect with each other.
Next, we insert them into the grooves of the connector until they stop and fix them. Visually, you should make sure that all the wires rested against the front wall of the plug head, none of them accidentally fell into a "foreign track", and that the crimping circuit is not broken. After that, the connector is placed in a special working socket of the crimper, made in the shape and size of the connector, and clamped until it stops. Such an operation is also done with the other end of the future patch cord. You can check the correctness of the connection with a LAN tester, and in the absence of such, simply by connecting the computer to desired device through a crimped network cable.
Cable crimping without crimper
If, nevertheless, there were no special pliers, and there is no way to buy them, there is an option how to compress the network cable manually. Useful here good vision and a thin screwdriver or knife. Cleaning the "twisted pair" from outer insulation and having laid out its cores in the right order, we place them in the connector and again fix them with our fingers. The plug must be with the contacts up.
uperev lower part connector into a table or other horizontal surface, you need to use a screwdriver or a knife to move them one at a time until they stop. In this case, the teeth of the contacts will cut the insulation of the wires and fix them in the down position. When buying connectors and planning to crimp them manually, it is better to take a few extra ones, because the first time it may not work out, and you will have to run to the store again.
Common Mistakes
When crimping a cable, situations often arise when everything seems to be done correctly, but there is no connection. In this case, you should check the wiring diagram and double-check it for compliance with the type of connection.
If everything is correct, you need to make sure that all wiring is securely connected to the connector pins. It is also possible that the upper insulation is too cut off, and the cores of the patch cord, twisting, can close or, conversely, move away from the contact. In such cases, the cable must be cut and crimped again.
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