Computer Networking Experiment How to make a network cable

How to make a network cableNetwork cable making diagram

To connect a local area network (LAN), a network cable is essential. There are three main types of common network cables in LAN: twisted pair, coaxial cable and fiber optic cable. The following editorial is to introduce the method of making network cable and diagrams, come together to learn it.

Network cable making method

We use the stripping function of the network cable pliers to peel off the outer skin of the cable, you will see the color and white intertwined with each other eight metal wires. Orange, green, blue, brown four color, and they are intertwined with each other are white orange, white green, white blue, white brown, some slightly orange, some just white, if it is a solid color, be careful, do not confuse the four white. We remove their winding separately, and note the order of placement is: orange, green, blue and brown, white in front, blue and green interchangeable. That means the end result is: white orange, orange, white green, blue, white blue, green, white brown, brown.

After a good position will be set up after the network cable swing straight, use the wire cutter to cut it neatly, the wire cutter usually network cable pliers have, be sure to ensure that the cut neatly, and then flat into the crystal head, make a strong push forward, when the front of the crystal head from the put all see the line neatly arranged after the use of the network cable pliers of the crystal head compression module will be extruded.

This order of making the cable is the generalized method of making the Category B cable.

If it is a class A cable production order is orange and green interchangeable into: white green, green, white orange, blue, white blue, orange, white brown, brown

Direct line is a network cable at both ends of the crystal head are A or B. If it is a crossover line is one end of the A one end of the B.

We commonly the following situations require a direct line, such as: computer and switch interconnections, switch and router interconnections. If it’s a computer-to-computing interconnect, you need a crossover cable.

Of course, none of these methods of cabling are used by everyone. This is because many network designers usually do not strictly follow this rule, but if they do not, the network cable has poor anti-interference performance and anti-attenuation performance. It is still recommended that designers strictly follow this order, which will ensure the best operation of the network. Therefore, if we go to repair the network, we must take a good look at the original old crystal head in accordance with what way to make, we do it in its order is, because we just make one end of the crystal head, so according to the order of the existing network cable production, otherwise, you must be cut at both ends, are re-made in accordance with the standard once again. In addition, the length of the network cable is best not greater than 100 meters, because the longer the model attenuation is more powerful, in addition to the copper core is relatively thin network cable maximum transmission distance is very limited, may not even reach 50 meters.

To give you a little bit of network cable production of a small tip: because in the construction of the house will often result in accidentally pulling the cable and one or more of them pull off, so those who do not have a standardized production method can help us to help. If we find that one or several of the network cable is broken through several tests, we can interchange them, for example, if the white orange and orange are broken, how to do it does not work, while the other is through, we can replace the white blue and blue or white brown and brown to replace them. But be careful, it has to be the same on both ends, i.e. neither is standard. Usually as long as 1, 2, 3, and 6 in the order are through, the numbers are the order of the netting in the replacement rules for A, B, or non-standard patterns. We once used to use a single cable to both access the Internet and install a phone.

This picture shows the network cable on the right and the crystal head on the left, in the order of the 568B standard network cable connection.

This diagram details how to make 568A and 568B crystal heads, the wiring sequence, and the use of straight and crossover cables for both wiring sequences.

Today in the test of a network cable is very troublesome 1 line how to do all pass, milli me more than an hour layer by layer checking no one off, really no way, had to use the principle of substitution. Use white brown and brown to replace white orange, orange.

Another: the interconnection method of network cable production can be referred to.

PC PC Cross Cable

PC HUB Direct Line

HUB Normal Port HUB Normal Port Cross Cable

HUB Normal Port HUB Cascade Port Direct Line

PC Router Cross Cable

Router Router Cross Cable

PC Switch Direct Line

Router Switch Direct Line

Switch Normal Port Switch Uplink Port Direct Line

Switch Normal Port Switch Normal Port Cross Line

Switch Uplink Port Switch Uplink Port Cross Line

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How to make a computer network cable?

1, find the computer network cable interface, the computer network cable to the interface gently press to connect the cable to the computer.

2, find the network on the computer, right-click Properties, open the Network Management Center.

3. Click Set up a new connection or network.

4, select “Connect to the Internet – Set up a new connection”, and follow the system prompts. Enter the relevant content to set up a network connection.

Before pressing the crystal head, we need to prepare the following tools: RJ45 crystal head, crimping pliers, twisted-pair cable, wire meter.Registered Jack developed by the Bell System, used to connect the user’s equipment to the public network.

There are two options for connection:

T-568A standard: white green green white orange blue white blue blue orange white brown brown

T-568B standard: white orange orange white green blue white blue green white brown brown

Commonly used computer-router connections are either T-568B (mostly) or T-568A at both ends of the connection, i.e., a direct connection, whereas computer-computer, switch -switch, etc. connections are cross-interconnected with T-568A at one end and T-568B at the other.

Don’t choose too cheap crystal head in the purchase of crystal head, because the crystal head is often not enough material or crystal head size, such as the crystal head of the copper contacts replaced with aluminum or iron and then in the appearance of the copper, such a crystal head can not be used because it is easy to oxidize, easy to break off.

Additionally, the size may not be standardized, resulting in the production of network cable crimping pliers can not locate the contacts so that crimping out of the crystal head can not be used at all, but also cause the insertion of the network interface is not solid, thus triggering network failures. It is also important to note that you need to buy a good quality crimping pliers, but also do not buy too cheap products, so that the production of the crystal head can not be used.

The production method of network cable, as well as which idle line is that several

With the computer network to deal with the inevitable often have to do with the network cable, the production of the network cable is very simple, is the twisted pair of 4 pairs of 8-core cable according to certain rules inserted into the crystal head, so the production of this type of network cable requires only twisted pair of materials and crystal head; the required tools are also relatively simple, usually only need a pair of special crimping pliers can be. The tools required are also simpler, usually just a pair of special crimping pliers can be. The production of twisted-pair cable is actually the production of the crystal head of the cable, the production of this type of cable is the difficulty of different uses of the cable jumper rules are different.

1. Straight through the production of RJ-45 connector

Step 1: twisted pair cable pliers (of course, you can also use other wire-cutting tools) to the five twisted-pair cable end of the cut (preferably cut a section of the network cable in line with the requirements of the length of the cable), and then cut the end of the cut inserted into the cable pliers used to stripping the wire notch, pay attention to the cable can not be curved, inserted straight into the cable, until the top of the cable pliers behind the Stop, slightly grip the crimping pliers slowly rotate a circle (no need to worry about damage to the network cable inside the core of the skin, because stripping the wire between the two blades to leave a certain distance, which is usually the inside of the diameter of 4 pairs of core wires), so that the knife cuts through the twisted-pair cable protection of the adhesive coating, pull down the adhesive coating. As shown in the figure below. Of course, you can also use a specialized wire stripping tool to strip the wire.

[Tips] The length of the cable clamp from the stripping cutter is usually exactly the length of the crystal head, so you can effectively avoid stripping the cable too long or too short. Stripping line is too long is not beautiful, on the other hand, because the cable can not be stuck by the crystal head, easy to loose; stripping line is too short, due to the presence of the skin, too thick, can not be completely inserted into the bottom of the crystal head, resulting in the crystal head pin can not be intact contact with the core wire of the cable, and of course can not be made successfully.

Step 2: Peel off the outer skin to see the twisted-pair cable four pairs of eight core wire, and you can see that the color of each pair is different. Each pair of winding two core wire is made up of a color-coded core wire plus a white interspersed core wire that is only slightly colored with the corresponding color. The colors of the four full-color core wires are: brown, orange, green, and blue.

First, the four pairs of core wires are arranged side by side, and then each pair of core wires are separated (at this time, pay attention to not across the line, that is to say, each pair of core wires are arranged next to each other), and in accordance with the order of unity (such as the left side is unified as the main color of the core wires, and the right side is unified for the corresponding color of the flowers and white core wires) arrangement. Note that each core wire should be straightened, and should be separated from each other and arranged side by side, not overlap. Then use the netting pliers perpendicular to the direction of the core wire alignment cut (do not cut too long, just cut flush), as shown in the figure below. From left to right numbering order we set “”.

Step 3: Hold the crystal head horizontally in your left hand (with the plastic buckle side down and the opening facing right), and then insert the 8 core wires, which are neatly cut and arranged side by side, into the crystal head side by side, paying attention to be sure to make the core wires are inserted into the bottom of the crystal head, and can not be bent (because the crystal head is transparent, so it can be seen from the side of the crystal head that has a card slot for each of the core wires inserted into the position of the crystal head). (because the crystal head is transparent, you can see clearly from the snap-in side of the head where each wire is inserted).

Step 4: After confirming that all cables are inserted into the bottom of the crystal head, you can insert the crystal head directly into the cable clamp notch, as shown in the following figure. Because of the notch structure and the same structure of the crystal head, must be placed correctly in order to make the back of the press down the cable clamp handle when the pressure position is correct. Crystal head can be placed after the press down the cable clamp handle, be sure to make a strong, so that the crystal head pins can be inserted into the core of the network cable, and good contact. Then gently pull the cable with the crystal head to see if the pressure is tight, it is best to press more than once, the most important thing is to pay attention to the location of the pressure must be correct.

So far, this RJ-45 head is crimped. In accordance with the same method of production of twisted-pair cable at the other end of the crystal head, it is important to note that the order of the core line must be arranged with the other end of the order is exactly the same, so that the production of the entire cable is completed.

Both ends of the crystal head can be done with a cable tester to test, if the tester on the eight lights are in order for the green flash, proving that the cable production success. If any one of the lights for the red or yellow light, there is proof of circuit breakage or poor contact phenomenon, it is best to the two ends of the crystal head and then use the cable clamp pressure, and then test, if the failure persists, and then check the two ends of the arrangement of the core wire order is the same, if not the same as the other end of the core wire with the cut off the end of the other end of the core wire arranged in the order of making the crystal head. If the core order is the same, but the tester still shows a red light or yellow light after re-taking, it shows that there must be a corresponding core contact is not good. At this point there is no way out, had to cut off one end according to the other end of the core line order to redo a crystal head, and then test, if the fault disappears, it is not necessary to redo the other end of the crystal head, or else you have to cut off the other end of the original crystal head to redo. Until the test is all green light flashes.

Seeking advice on how to make a network cable.

Commonly used components of network equipment, which consists of twisted-pair cable and RJ45 header, due to improper production will affect the network connectivity. The following is a brief introduction to the twisted-pair cable and production methods.

Twisted-pair cable is generally divided into straight-through line and cross-wire according to the way of connection.

Straight-through line: is used to connect computers in the network and the hub (or switch) of the twisted-pair cable. It is also divided into one-to-one correspondence connection and 100M connection. A one-to-one connection, that is, the two ends of the twisted-pair cable should be one-to-one correspondence, this end of a foot, must be connected to the other end of a foot, although not in order, but to be consistent. 100M connection, means it can meet the 100M bandwidth of the communication rate. Although it is also a one-to-one correspondence, but the color of each foot is fixed, the specific arrangement of the order: white orange / orange / white green / blue / white blue / green / white brown / brown.

Crossover cable: is used to connect the same type of equipment in the network of twisted-pair cable, such as: between computers and computers, or switches, such as cascade connection

The following is the introduction of twisted-pair cable, the specific steps are as follows:

Step 1: the use of diagonal pliers to cut the length of twisted-pair cable required, at least 0.6 meters, not more than 100 meters at most. Then use a twisted pair wire stripper (whatever cutter is actually used) to remove 2-3 centimeters of the outer jacket of the twisted pair.

Step 2: After the stripping is completed, you can see four pairs of a total of 8 wires, which are twisted together in pairs, these four pairs of wires are: white-orange/orange, white-blue/blue, white-green/green, white-brown/brown. Then carefully peel off each pair of wires, because we are following the EIA / TIA568B standards to produce the connector, so the color of the wire is a certain order of requirements. If you are making a 100M straight-through cable, the ends are listed in the following order: white-orange/orange/white-green/blue/white-blue/green/white-brown/brown. If you are making a crossover cable, the following order:

One end: White Orange/Orange/White Green/Blue/White Blue/Green/White Brown/Brown

The other end: White Green/Green/White Orange/Blue/White Blue/Orange/White Brown/Brown

Step 3: Straighten out the 8 cables in a good order, and cut off the excess cables with crimping pliers, leaving a length of about 14mm, which is the reason for the length of the cable. This length is to comply with the EIA/TIA standard, pay attention to the cut part should be neat.

Step 4: Turn the RJ45 header with the copper contact side up, and insert the 8 cut wires into the RJ45 header slot in the order in which they are arranged, and then press the RJ45 header firmly with the RJ-45 crimping pliers after determining that each twisted pair of wires has been correctly inserted and put in place.

Repeat the above steps, the other end of the corresponding good, so a twisted-pair cable is ready. At this point, you can pull down the original normal access, smooth operation of the network cable, replace the twisted-pair cable you made, try to see if you can continue to browse the Web; or in the DOS command to run the PING command, to see if you can connect.

Steps and methods to make a network cable in seven steps


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The computer equipment we use is usually connected to the Internet with a network cable, which is one of the most commonly used network equipment now. The steps to make it are as follows:

Network cable can also be twisted pair, and there are two ways to connect it: normal connection and cross-connection.

1, the normal connection: both ends of the twisted-pair cable, respectively, are in turn, according to the white-orange, orange, white-green, blue, white-blue, green, white-brown, brown order (which is the international EIA/TIA568B standard) pressed into the RJ45 crystal head. The network cable made in this way is used for the connection between the computer and the hub.

2, cross-connect: one end of the twisted-pair cable according to international standards EIA/TIA568B standards pressed into the RJ45 crystal head; the other end of the core line in order to white-green, green, white-orange, blue, white-blue, orange, white-brown, brown order (which is the international EIA/TIA568A standards) pressed into the RJ45 crystal head. Network cables made in this way are used for computer-to-computer connections or cascading of hubs.

The following is the wiring diagram of these two connectors and the applicable occasions.

Happy day to you!