Gigabit cable approach, Gigabit wire crystal Head connection method

The local area network is the individual computer or the terminal, uses the communication line to connect each other, follows certain agreement, carries on the information exchange, realizes the resource sharing. Among them, communication lines, that is, transmission medium commonly used: twisted-pair, coaxial cable, optical fiber and so on. From the cost-performance and maintainability, most LANs use unshielded twisted pair (utp-unshielded Twisted Pair) as the transmission medium to network.

The network cable is composed of a pair of twisted wires with a long distance and a RJ45 head. Twisted strands are divided into 4 pairs of 8 different color lines, the role of the team twist is to minimize the impact of electromagnetic radiation and external electromagnetic interference, twisted-pair can be based on the metal wire mesh of the shielding layer to distinguish between shielded twisted-pair (STP) and unshielded twisted pair (UTP). In the EIA/TIA-568A standard, the twisted-pair wires are divided into three categories, four types and five kinds of lines according to the electrical characteristics. The most commonly used in the network is the three types of lines and five types of lines, at present there are more than six types of lines. The third kind of twisted pair is commonly used as 10Mbps Ethernet data and voice transmission in LAN, which accords with the standard of IEEE802.3 10base-t. The fifth type twisted-pair line currently occupies the largest LAN market, the highest rate can reach 100Mbps, conforms to IEEE802.3 100base-t standard. Do a good cable to the RJ45 Crystal head into the network card or hub and other networking equipment RJ45 socket. Accordingly, the RJ45 plug block is divided into three kinds or five kinds of electrical characteristics. RJ45 Crystal Head by metal sheet and plastic composition, special attention is the PIN number, when the metal sheet facing us from left to right pin number is 1-8, this serial number to do network line is very important, can not be mistaken. The maximum transmission distance of twisted pair is 100 meters.

The wiring standard of the Eia/tia stipulates the line sequence 568A and 568B of the two twisted-pair wires.

Standard 568A: Orange white--1, Orange--2, green and white--3, Blue--4, blue and white--5, green--6, brown and white--7, Brown--8;

Standard 568B: Green white--1, green--2, Orange white--3, Blue--4, blue and white--5, Orange--6, brown and white--7, Brown--8.

In the whole network wiring to apply a wiring method, but both ends have RJ-45 plug network line whether using the end of the way a, or termination mode B, in the network are universal. The order of twisted pair and the pin number of the RJ45 head-corresponds. The 10M Ethernet network cable transmits data using the 1,2,3,6 numbered core wire, and the 100M Ethernet network cable transmits data using the 4,5,7,8 numbered core line. Why are the 4 pairs (8-wire) twisted pair now? This is mainly to adapt to more use of the scope, without the transformation of infrastructure, under the premise, can meet a wide range of user equipment wiring requirements. For example, we can use a pair of stranded wires to achieve voice communication. RJ45 Crystal Head, RJ45 Head, Crystal Head, network connectors, RJ45, wiring connectors

100BASE-T4 RJ-45 pairs of twisted-pair lines are as follows:

RJ45 Crystal Head, RJ45 Head, Crystal Head, network connectors, RJ45, wiring

1, 2 for sending, 3, 6 for reception, 4, 5, 7, 8 are two-way lines.

1, 2 line must be twisted, 3, 6 twisted, 4, 5 twisted, 7, 8 twisted pair.

The following is a brief introduction to the fabrication methods of twisted-pair wires in several application environments.

MDI indicates that this port is a cascade port, while mdi-x indicates that this port is a normal port.

1 PC and other network equipment connected to the hub, the cable used for straight line, twisted pair of wires to each of the corresponding, at this time, hub for mdi-x mouth, PC for MDI Port. 10Mbps network cable as long as the twisted pair at both ends of the line can be, do not have to consider the order of different colors, and if the use of 100M rate connected, you must strictly follow the Eia/tia 568A or 568B wiring standards. Crystal Head | cable | Crystal Head | wire | Crystal Head | twisted Wire | Crystal Head | wire | Crystal Head | wire | Crystal Head | twisted Wire |

2 during the hub Cascade, the Cascade control switch should be placed on the MDI (uplink) and connected with a straight line. If the hub does not have a dedicated grade port, or can not use the cascade, you must use the Mdi-x mouth level, at which point, we can be used to achieve the purpose of the crossover line, where the intersection line, that is, when doing network cable, with one end RJ-45 plug 1 feet to the other end of the RJ-45 plug 3 feet; and then one end RJ-45 Plug's 2 feet receive 6 feet from the other end of RJ-45 plug. Can be produced according to the following chromatography:

A-side: orange white, orange, green, white, blue, blue, white, green, brown white, brown;

B-end: Green, white, green, orange, blue, blue, white, orange, brown, Brown.

At the same time, we should also know that the level of the network cable between the length should not exceed 100 meters, the hub of the level should not exceed 4 levels. Because the intersection line is less used, it should be made special mark, so as to avoid future mistake for direct line, resulting in line failure. In addition, the crossover cable can also be used in two micro-computer direct connection.

At last, the circuit must be tested with RJ-45, 4 green lights should be flashing in turn. The most common way to debug software is to use the ping command with Windows95 and Windows 98. If the workstation gets a response from the server, the line is normal and the network protocol is properly installed, and this is the basis for the network application software to work properly.

How to make Gigabit cable

The form of Gigabit 5 or Super 5 twisted-pair lines is the same as that of the hundred-gigabit cable, which is also divided into two kinds: straight and cross. Straight line cable and we usually use no difference, are one by one corresponding. But the traditional hundred gigabit network only use 4 cable to transmit, and gigabit network to use 8 to transmit, so Gigabit crossover cable production and hundred trillion different, the production method is as follows:

1 to 3,2 to 6,3 to 1,4 to 7,5 to 8,6 to 2,7 to the 4,8 to 5

For example:

One end is: half orange, orange, half green, blue, half blue, green, half brown, Brown;

The other end: Half green, green, half orange, half brown, Brown, orange, blue, half blue

The approach of Gigabit cable

The form of Gigabit 5 or Super 5 twisted-pair lines is the same as that of the hundred-gigabit cable, which is also divided into two kinds: straight and cross. Straight line cable and we usually use no difference, are one by one corresponding. But the traditional hundred gigabit network only use 4 cable to transmit, and gigabit network to use 8 to transmit, so Gigabit crossover cable production and hundred trillion different, the production method is as follows:

1 to 3,2 to 6,3 to 1,4 to 7,5 to 8,6 to 2,7 to the 4,8 to 5

For example:

One end is: half orange, orange, half green, blue, half blue, green, half brown, Brown;

The other end: Half green, green, half orange, half brown, Brown, orange, blue, half blue

The form of Gigabit 5 or Super 5 twisted-pair lines is the same as that of the hundred-gigabit cable, which is also divided into two kinds: straight and cross. Straight line cable and we usually use no difference, are one by one corresponding. But the traditional hundred gigabit network only uses 4 cables to transmit, and gigabit network to use 8 to transmit, so the production of gigabit crossover wire is different from the hundred trillion, the production method is as follows: 1 pairs of 3,2 to 6,3 to 1,4 to 7,5 to 8,6 to 2,7 to 4,8 to 5

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The form of Gigabit 5 or Super 5 twisted-pair lines is the same as that of the hundred-gigabit cable, which is also divided into two kinds: straight and cross. Straight line cable and we usually use no difference, are one by one corresponding. But the traditional hundred gigabit network only uses 4 cables to transmit, and gigabit network to use 8 to transmit, so the production of gigabit crossover wire is different from the hundred trillion, the production method is as follows: 1 pairs of 3,2 to 6,3 to 1,4 to 7,5 to 8,6 to 2,7 to 4,8 to 5

For example:

One end is: half orange, orange, half green, blue, half blue, green, half brown, Brown;

The other end: Half green, green, half orange, half brown, Brown, orange, blue, half blue

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2.AVAYA (CommScope)

Single-layer structure, handle the cross core, set good buckle ring, the introduction of the wire frame buckle, trim. The tail buckle after the test passed with 502 fixed dead, the coat also to use 502 fixed dead. The whole process should be careful, careful, the length of the twist, the shorter the better,

1. Gigabit backbone switch, then Gigabit switch, what line? Class six line (CAT6)

2. Gigabit backbone switch, the hundred-gigabit switch, with what line? Buy 26-Port switches with 1000Mbps copper ports. Six class Line (CAT6)

3. Gigabit backbone switch, connect new server, what line? Six class line (CAT6)

4. Gigabit backbone switch, connect the old server, with what line? Super Five Class (CAT5e)., Run 100Mbps

5. Gigabit switch, pick up the new machine, with what line? The budget is more than six lines (CAT6), at least five categories (CAT5e).

6. Hundred trillion cent switch, connect the old machine, with what line? With the Super Five class. There is the original can not move, the quality is too bad to cut off, the new cloth over the Super five categories (CAT5e),

The above six types of line with six types of head, Super five type with shielding head (also not expensive), to ensure that the line and head are authentic!!!

Super five type head with AMP crimping clamp, six type head presses or self made tools to suppress. The line sequence is arranged in 568B order and then tested with the relevant detection tool.

The relevant pictures of this topic are as follows:

Line to design reasonable, to ensure that the appropriate cable bending radius, both ends of the redundant cable to organize the protection, the coil should follow the original direction of rotation, do a good mark.

Pay attention to the diameter and the filling of the wire groove

6 class Line procedure 1 to the 3,2 to the 6,3 to the 1,4 to the 7,5 to the 8,6 to the 2,7 to the 4,8 to 5

White orange orange white green blue white blue green white brown brown

1 2 3 4 5 6 7 8

White Green green white orange white brown orange blue white Blue

At least 300M at this rate.

Gigabit Network approach

Now, the rapid development of the network has entered the G era, and gigabit network transmission equipment is not a new thing. However, as high-end equipment, they also have "high-end" price. Just like the following this original imported Lucent Gigabit network cable, 2 meters long, but to hundred yuan price, if it is ordinary hundred gigabit cable, 4 yuan is enough. Today, I reluctantly give it to everyone to a full anatomy, let us see what it is special in the end.

This is the comrade who is to be sacrificed today. A cursory look, and there is no special place, that is, the line body than the ordinary hundred trillion to a bit thicker, RJ45 crystal head somewhat different.

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The following is a close-up of the crystal head, this is a positive, you can clearly see the word Lucent, the overall material for translucent matte, feel good, and hundred trillion crystal head of the kind of full transparent smooth surface is different. In LUCENT this logo position, the original is the hundred mega-cable crystal head of the card line position, used to fix the back-end of the network cable. This gigabit Crystal Head has switched to another card, which I will explain in detail in the anatomy that follows.

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This is the upper, nothing special, after all, it is backward-compatible, and hundreds of megabytes of the network can also be connected.

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Below, we will dissect, first cut off the net head.

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(Dry tears) We continue to analyze, the above is the gigabit network cable, below is the ordinary hundred gigabit network cable. It can be seen that the gigabit core is indeed a bit thicker than the hundred trillion, so that the overall skin diameter is also a bit larger. From the color, the line color of the hundred trillion in accordance with the order is: orange white, orange, blue and white, blue, green and white, green, brown white, brown. The so-called orange white, blue white, and so on, just on the white line, every paragraph has a few small dots with color. We are in the production of hundred mega-wire when in order to prevent those who cross the line is not obvious and mixed, is generally in accordance with the order of twisted down, and then squeezed with the hands of the squeeze, a continuous more joints, thumbs will be tired cramps. Now this gigabit line has obviously improved the flaw, his line color is: white, orange, blue, dark blue, light green, dark green, light brown, dark brown, each line has its own color, rather than the white line on the point of paint instead.

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And then the wire core wire skin peel off, see a different bar. Ordinary hundred trillion line is a single root copper wire, and gigabit line is inside each core there are 7 silver plating. Obviously, the transmission efficiency is also high, and in the daily use, more difficult to break.

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And then the crystal head inside the light blue splitter pull out, this really cost me a lot of strength, because the front of the contact copper pieces penetrate and oppress the line, I used two pliers and a small screwdriver another 10 minutes to catch a valuable time to take it out completely

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This is a close-up of the splitter, the second one is the look from the top, because it is transparent, you may not be able to fully understand the structure of the picture, let me describe it.

First of all, twisted-pair line from the back of the distributor, in the cross-shaped inlet in accordance with the line to separate, white, orange into the Zokong; light blue, dark blue into the hole, green, dark green into the lower hole, brown, deep brown into the right hole. To the front end in accordance with white, orange, light green, dark blue, light blue, dark green, light brown, dark brown in order to be lined up, the end of the thread and the front can be inserted into the shell of the RJ45 Crystal Head. This is a good improvement, then the original kind of break and pinch and poke the awkward process abandoned. And the core only to the top to become the arrangement of the plane, in the entire 80% of the area of the joint is still a twisted and circular state, which is significantly stronger than the original hundred mega joint. Not only is the production process, in the transmission efficiency is also a relatively large improvement. (So many strange parts, it seems the original RJ45 crimping pliers is helpless to it)

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Discussion on the fabrication method of the gigabit wire crystal Head

Recently contacted Gigabit network, but for the production of gigabit Crystal head on the internet there are a variety of methods, in the end which method is scientific and reasonable to pass our actual test.

We know that the hundred Gigabit cable only used the twisted pair of 8 lines of which 4, and thousands of trillion need to use 8, this for the production of Crystal head and improve the difficulty.

There are about 3 ways to do this online:

The first type: Network cable with super 5 twisted pair, crystal head connection, both ends of the use of 568B standard, that is, both sides are white orange orange white green Lan Bailan green white palm brown.

The second: is also the most online use of super five lines of gigabit cable production methods, one with 568B standard, the other end of the intersection relative to the 568B standard, crossover principle: 1 to 3 2 to 6 4 to 7 5 to 8

White, green, white, brown, Orange, Lan Bailan.

Third: one end according to the 568A, the other end according to the 568B standard to receive.

For the above three methods we test each:

Environment: H3C Gigabit Switch, P4 3.0CPU Seagate 160G 8M hard Drive, super 5 type twisted pair 5 meters long.

In the first way:

The file is up to 20m/s speed.

According to the second method:

The file is up to 32m/s speed.

According to the third method:

Network cable connected after the reality of the network card is not connected (PS: Do not know what is going on, theoretically should be through)

Summary, for gigabit Network if use Super 5 line of words, we still follow the second kind of hair is better.