Network cable-network cable Sequence

How to make a network cable-network cable Sequence

14:03:16 | category: Share read 135 comments 0 font size: LargeMediumSmall subscription

General orange, orange, green, blue, blue, green, brown, white.

If there are only four wires, choose four cables. When the cables are made, press the four portals of the crystal head at 1/2/3/6.

If you only have one network cable, but want to connect to the Internet with two computers at the same time, do not add peripherals, when the network cable is made 45 crystal head connection method

 

Crystal head metal face, from left to right is 1-8 (white orange, orange, white green, blue, white blue, green, white brown, brown) Network Connection Method I. Connecting a PC to a hub (connecting a computer to an Internet device) End A: (Standard 568b): white orange, orange, white green, blue, white blue, green, white Brown, and brown. End B: (Standard 568b): white orange, orange, white green, blue, white blue, green, white Brown, and brown. 2. Connecting PCs (Connecting PCs) End A: (568a): white green, green, white orange, blue, white blue, orange, white Brown, and brown; End B: (Standard 568b): white orange, orange, white green, blue, white blue, green, white Brown, and brown. 3. connecting hub (connecting internet devices to internet devices) End A: (568a): white green, green, white orange, blue, white blue, orange, white Brown, and brown; End B: (568b): white orange, orange, white green, blue, white blue, green, white Brown, and brown. Gigabit 5 category or over 5 category (including 6 category) twisted pair wires are in the same form as 10-Gigabit Network cables. They are also divided into two types: pass-through and crossover. The straight-through network cable is exactly the same as what we usually use. However, the traditional 10-Gigabit network only uses four cables for transmission, while the 1-gigabit network uses eight cables for transmission. Therefore, the production of a 1-gigabit crossover network cable is different from that of a 10-Gigabit network cable. The method is as follows: 1 to 3, 2 to 6, 3 to 1, 4 to 7, 5 to 8, 6 to 2, 7 to 4, 8 to 5. For example: End: White orange, orange, white green, blue, white blue, green, white Brown, and brown; Other end: white green, green, white orange, white brown, brown, orange, blue, white blue; T568b: Orange, orange, green, blue, blue, green, brown T568a: green, green, orange, blue, blue, orange, brown, brown Direct Connection: both ends are made into t568b or t568a. Used to connect different devices (such as NICs to vswitches ). Crossover line: one end is made into t568b and the other end is made into t568a. Used to connect the same device (such as the network card to the network card ). There are only four shrapnel in the 10 m Nic, and the other four of the eight wires do not work, so the requirement is low. The two sides can be in the same order, but it is best to follow the standard; there are eight shrapnel in the M Nic, four are used for data transmission, and the other four are used to prevent crosstalk. The cables can be established in strict accordance with the specifications to reduce network faults. M use four-wire , Must be twisted pair Cross-line production (used for direct connection between the hub and two computers without a line connection port) 10 m 1 2 3 4 5 6 7 8 3 6 1 4 5 2 7 8 100 m 1 2 3 4 5 6 7 8 3 6 1 2 7 8 4 5 Ele. Me experience: Use two pairs of lines 1, 2, 3, and 6 at 10 m. (1 sends data, 1 sends data, 2 sends data, 3 sends data, and 6 receives data: 4, 5, 7, and 8 are retained .) If there is only one network cable, but you want to connect the two machines to the Internet at the same time without adding peripherals, the method of connecting the network cable with a 45 crystal head is used; or there is only one network cable interface in a room, but what should I do if I need two computers to access the Internet? The premise is that no peripherals are added. (If you are using a 10 m Nic) the method is as follows: (1) In fact, the average company network and personal network can be up to 10 m, that is to say, the actual working line of the network cable is only: 1, 2, 3, 6 (that is to say, only four lines can be used to access the Internet) (Standard 586b: Orange-1, orange-2, green-3, blue-4, blue-5, green-6, brown-7, example: brown-8 .) That is, the actual working line is: Orange-1, orange-2, green-3, green-6. Here: Blue-4, blue-5, brown-7, and brown-8 are redundant. (2) We all know that there are eight network cables, and the remaining four are connected to another machine. The specific connection method is as follows: dial the connected network cable out: Blue-4, blue-5, brown-7, brown-8, 4 lines, connect to another crystal head, because the position of the crystal head is difficult to determine, you can find several lines to occupy space. The network cable ends are arranged as follows: Blue-1, blue-2, brown-3, waste line-a, waste line-B, brown-6, waste line-C, waste wire-ding. (Waste line only occupies the position in the crystal head, because the remaining four lines may be misplaced. In fact, there is no substantive significance, so we can cut off all) OK 10 m uses two pairs of cables: 1, 2, 3, and 6. (1 sends data, 1 sends data, 2 sends data, 3 sends data, and 6 receives data: 4, 5, 7, and 8 are retained .) Dual-host direct connection network cable practice illustration ★For dual-host direct connection, you must use a crossover network cable (in fact, 1236 or four lines are crossed). In fact, the network cable provided by ADSL is such a network cable. The two ends are arranged in the following ways: 1 2 3 4 5 6 7 8 3 6 1 4 5 2 7 8 If you are using a simple network cable measuring instrument, the hop sequence should be: 12 → 45 → 78 → 36 → 12. Next we will explain it in detail: End: White orange, orange, white green, blue, white blue, green, white brown, brown (12345678) 1 2 3 4 5 6 7 8 End: white green/White orange/blue/white blue/orange/White brown/Brown (36145278) 3 6 1 4 5 2 7 8 You can also cross the four 4578 lines, that is: 1 2 3 4 5 6 7 8 3 6 1 7 8 2 4 5 -- Detailed Method Proper connection to crystal head/twisted pair wires Twisted Pair wires have two Connection Methods: EIA/TIA 568b standard and EIA/TIA 568a standard. The specific method is as follows: T568a line sequence 1 2 3 4 5 6 7 8 green white green orange white blue white orange brown white Brown T568b line sequence 1 2 3 4 5 6 7 8 orange white orange green white blue white green brown white Brown Express CONNECT: both ends are connected in t568b line order. Crossover line: one end is connected in t568a line Order and the other end is connected in t568b line order. When creating a network cable at ordinary times, if the network cable is not connected according to the standard, although sometimes the line can be connected, the interference between various lines within the line cannot be effectively eliminated, leading to an increase in the error rate of signal transmission, this affects the overall network performance. Only by building standards can we ensure the normal operation of the network and facilitate the maintenance work in the future. 1. nic to NIC: if you do not need to connect directly to the hub, the dual-adhesive line should be made into a cross line. The production method is: Take a dual-adhesive line (the length can be determined based on your needs ), strip the outer skin of the twisted pair, and arrange the skin from left to right in the order of white green, green, white orange, blue, white blue, orange, white Brown, and Brown. Insert the RJ45 crystal head; the other end is arranged from left to right in the order of white orange, orange, white green, blue, white blue, green, white Brown, and brown, and the other RJ45 crystal head is inserted. That is to say, the two ends have the opposite method, and the connected line will form two overlapping * shapes, otherwise it will not be connected. Then, insert the two ends of the prepared dual-gel cable into the NICS of the two computers. 2. nic and optical transceiver module: Install the NIC on the computer and set it up. Connect the transceiver to the power supply and operate it in strict accordance with the Instructions. Connect the computer and the transceiver with twisted pair wires, the twisted pair cable should be an AC * line connection method. The optical jumper connects two receivers. For example, if the transceiver is single-mode, the Jumper also applies single-mode. When the optical jumper is connected, one end is connected to RX, and the other end is connected to TX. However, many optical modules now have the control function, which can be used for cross-line and direct-line connections. 3. Optical Transceiver Module and switch: Use twisted pair wires to connect the computer with the transceiver. 4. Nic and switch: the twisted pair wires are connected through a direct connection. 5. hub and hub (switch and switch): two hubs (or switches) are connected through a twisted pair cascade. the midline pairs of the twisted pair are different from those of the nic and hub. cross lines must be used. This situation applies to connections between hubs that do not indicate dedicated cascade ports. For convenience, many hubs provide a port dedicated to connecting to another hub, when cascade these hubs, the twisted pair wires should be connected through a direct connection. 6. Between a vswitch and a hub: The vswitch and the hub can also be connected in cascade mode. Level-1 connectivity is often an effective solution for connecting vswitches of different brands and between vswitches and hubs. Another way to expand the number of ports is stack. Stacking is the quickest and most convenient way to expand ports, but not all switches support stacking. Dedicated stacking cables and dedicated stacking modules are usually required for stacking. In addition, the same group of stack switches must be of the same brand and must be set after the physical connection is completed to run properly. For the stacking method, I will not go into details here. Interested readers can refer to the relevant information further. Many people (including the author) have thought that 10 Base-T 10 m networks use four of the eight signal lines in the network cable, the 100 Base-t m uses all eight signal lines (or how fast ?). However, when the author recently used a 10 m direct connection method (switching between 1 and 3, 2 and 6, and shielding the other four lines) to connect the network cable, unexpectedly, it was found that the Network was being transmitted at a speed of MB, so I had to worry about it. So I checked a lot of information on the Internet and used several machine experiments to verify it. I finally found out the truth. That is, the m twisted pair is the same as the 10 m standard connection method! Unfortunately, the opinions of domestic sites (representing the views of most people) are basically the same as those of the author, or even though they are mentioned, they are also vague and have not gone into depth, therefore, I think it is necessary to write this article. 1 twisted pair connector (RJ45) PIN number definition 210m twisted pair connector standard connection method 3100m twisted pair connector standard connection method 41000m twisted pair connector standard connection method 5 various types of twisted pair standard connection method summary 6 twisted pair standard connection method origin 7 various types of twisted pair standards what are the differences between the class 83, Class 5, and Category 5 cables of the direct connection method and the class-level connection ports on 9hub? Twisted Pair connector (RJ45) PIN number definition NIC/hub end Jack cable crystal connector 10 m twisted pair connector standard connection Cable requirements cat-3 (Class 3 Wire )... number signal definition line for the color 1tx + orange white 2tx-orange 3rx + green white 4 unused Blue 5 unused blue white 6rx-green 7 unused brown white 8 unused brown M twisted pair connector standard wiring requirements cat-5 (Category 5 ), the connection method is fully compatible with 10 m. Number signal definition line for the color 1tx + orange white 2tx-orange 3rx + green white 4 unused Blue 5 unused blue white 6rx-green 7 unused brown white 8 unused brown M twisted pair connector standard wiring requirements CAT-5e (Class 5 reinforced Wire, is fully compatible with 10 m/m. The 1000 Base-T bidirectional use of all signal lines in the RJ45 connector. Although Category 5 cables can work, Category 5 reinforcement cables are recommended. Number signal definition line for color 1bi_da + orange white 2bi_da-orange 3bi_db + green white 4bi_dc + blue 5bi_dc-blue white 6bi_db-green 7bi_dd + brown white 8bi_dd-the standard method of connecting various brown twisted pairs is summarized above 10 m, 100 m, M various standards, it can be found that although each standard has a slightly different definition of the line function, the final connection method is the same, and the standard connection method of the twisted pair is not strictly specified, in order to keep the symmetry of the cable connector layout as much as possible, in this way, in addition to the mutual interference between the cables in the connector can be reduced to a minimum, at the same time, the differential signal values of external interference can be equal as much as possible so that the anti-interference circuit can be used for subtraction to eliminate it. Therefore, when we create a network line at ordinary times, if it is not made according to the standard, although sometimes the line can be connected, the interference between the lines inside the line cannot be effectively eliminated, thus increasing the error rate of signal transmission, this eventually leads to a decline in network performance. In fact, the network cable connection method we use in this article is the EIA/TIA 568b standard, and there is also an EIA/TIA 568a standard, it only exchanges the orange line pair and the green line pair in the figure (that is, the green white-1, the green-2, the orange white-3, the blue-4, the blue white-5, orange-6, brown-7, brown-8), the layout of the cable connector is still symmetric. When the standard direct connection method of all kinds of twisted pair 10 M and M NICs are directly connected, no hub is needed. In this case, only the Tx and Rx line pairs need to cross each other, that is, one can exchange with three, two and six. Because the M wire pairs are bidirectional, they do not need to be crossed at all. However, in order to be backward compatible, they also adopt the switch between 1 and 3, 2 and 6 for direct connection, because the compatibility with the old standard is taken into account for various M standards, we only need to make a network cable according to the standard of m, it can be used for various speeds. Below is the specific connection method of one of the direct connections (the other is connected according to the standard method): compared with the standard connection diagram, we can find that the two actually only exchange the green line pair and the orange line pair, careful people will find that it is just the EIA/TIA 568a standard. Therefore, the standard connection method of the direct connection twisted pair is to press the EIA/TIA 568a, connect the other end to EIA/TIA 568b. Both ENDS comply with international standards, which is the benefit of standards. What are the differences between Category 3, Category 5, and Category 5? First, let's talk about why twisted wires instead of parallel lines? Isn't parallel lines easier to produce? This is because the high-frequency signal> 10 MHz is passed on the network line. At this time, the insulation line between wires is equivalent to a dielectric board, the capacitor formed by the wire and the wire play a bypass Attenuation Effect on the high-frequency signal (the signal phase is lagging behind). Because of the high signal frequency, it cannot be ignored, so it is impossible to transmit the high-frequency network signal through parallel lines. However, if we pair this parallel line to a pair, it will form a series inductor while forming a capacitor online. According to the knowledge of electronic circuits, the effect of the inductance is just opposite to that of the capacitor, it advances the signal phase. As long as the winding of the wire is adjusted, the inductance and capacitance formed by the wire pair can be exactly offset, and with the increase of the length of the line, both functions increase to the same extent. Ideally, the signal can be transmitted on the twisted pair without attenuation. From this we can know that although the appearance of category 3, Category 5, and Category 5 lines on the market is similar, there must be the following differences: first, the insulation material of the signal line is different. The better the line, the smaller the dielectric constant, and the smaller the forming capacitor, second, the winding degree of the wire pair may be different (determined based on the dielectric constant of the insulation material ). Another point is that the softer the wire, the better the quality. There are two reasons: first, it indicates that the wire has a high copper content (because the copper is soft), and its DC loss will be very small, the other side shows that the wire may be multi-strand rather than single-strand, because the multi-strand wire has stronger transmission capability for high-frequency signals. This is related to another physical phenomenon (it seems to be called the skin effect ). In general, the hub will leave a port for the cascade connection between hubs, that is, connecting many hubs, in order to make full use of hardware resources in non-hierarchical connection, this interface is generally connected with a common Nic interface next to it. Another scenario is to set a redirection switch to change the function of the last network port. What is the difference between the network port used as a cascading interface? In fact, it is very simple. The level-connected network port is a standard dual-host direct connection interface, that is, 1 and 3, 2 and 6. If we know this fact, we can: 1. In Figure 5, when the hub is not powered, we can use two common network cables to connect two computers, you only need to insert a network cable into the level connection port, and the other interface next to it. 2. For a hub without a level-1 connection, we can connect it to another hub-level through a dual-host direct connection (each with any common network port ). 3. Insert the dual-host direct connection into the hub-level connection port. You can connect to the same hub network port as the normal network cable. (I have crossed the lines between 3, 2, and 6 and changed back again ), in this way, you only need to bring a dual-host direct connection to go out. Direct Connection and hub plug-in are unique to on-site service personnel .. Direct connection between two computers Two computers with wireless network cards that support B should be configured as pay-as-you-go networks. 1. Enable all wireless network cards. 2. Under the "wireless network configuration" tab in the wireless network connection attribute, select "use Windows to configure my wireless network configuration ". In "preferred network", add a network. The "service name (SSID)" can be any name, but the two computers must have the same SSID. There is no special need. "network verification" can be configured as "open", and "Data Encryption" can be configured as "disabled ". 3. Special attention. In advanced options, you must configure "computer-only ". Otherwise, the peer network cannot be formed. You need to enable Windows Wireless Services! 1. There are several ways to connect a notebook to a desktop: First, it is connected through a direct network connection. Buy a cable in the market, five cat5e twisted pair wires, and then let the people who sell the cable help to make a straight-through method, go home and put the two ends of the cable into the notebook and desktop, respectively, configure the network IP address. The connection speed is around Mbps. The second is infrared connection. If your desktop has a front infrared interface and your laptop has an infrared interface, you can open the infrared ports of the two machines to automatically find the machine and transfer files to each other. The third is wireless connection. The desktop is connected to a wireless network card with a USB interface. A wireless network card is also installed in the notebook, and then two wireless network cards are opened, after finding the other party and configuring the network IP address, you can share it. It feels like using a wired network, but this method can be freely moved without any restrictions :) 4. connect through the ieee1394 line, and then the two hosts can communicate with each other. The communication speed is very fast. Fifth, a USB Bridge Connection is the one that can connect two hosts. After plugging in the connection, you can install the driver and then connect the two hosts. 6. Connect the dual-host through the parallel port 7. Dual-host interconnection through serial ports 2. Shared bandwidth is a little more complicated. First, your operating system is preferably XP Pro or Win2k server, supporting dual-nic interconnection, and then enable the option "allow others to connect to the Internet through this machine" in the Internet Settings, on the other platform, you can set the Internet access method through "another computer". However, the setting is very tedious and difficult to be successful at a time. Another way is to use proxy server software such as WinGate on a desktop, and then use the proxy server to access the Internet on a laptop. There is another way. Some software can now support smart connection and Internet sharing functions. I have tried Lenovo y300 laptop to randomly send any connected software. Very convenient. Direct network connection has nothing to do with the operating system version. XP/2 k/98/me can be interconnected. The key is whether the network is smooth and whether the network parameters are set to be correct. Dual-host direct connection requires direct connection to the network cable, which is the one with two headers. After the connection, you can see that the indicator on the NIC is flashing. Then set the IP address. We recommend that you set the IP address to 192.168.0.1 and the subnet mask to 255.255.255.0. Set another IP address to 192.168.0.2 and the subnet mask to 255.255.255.0. Run the doscommand: Ping 192.168.0.x. If the feedback is xxms, the network is smooth and the dual-host connection is successful. Otherwise, check whether the network cable is not properly connected or the network cable is faulty. You cannot use two headers. They are used to connect to the hub or vswitch.