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provided by ADSL is such a network cable. The two ends are arranged in the following ways:1 2 3 4 5 6 7 83 6 1 4 5 2 7 8If 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 8End: white green/White orange/b
The network cable is already inseparable from our life. Because we often use the network cable, we need the network cable to access the Internet. Therefore, we need to learn how to make the network cable so that we can better control our life in Russia, Okay. Let's just talk about the network connection methods. Th
Cable TV Cable (Cable) mode broadband access to the Internet is the standard docsis (Data over Cable Service Interface specification), Recently this standard has been upgraded to 2.0, and Imedia announced in April the DOCSIS2.0 chip IM6030 and a reference design that can be mass-produced immediately. This means that th
How many meters does the network cable transmit at most? Several common categories of network cable and network cable transmission Maximum network cable data transmission distance If you know more about the network, you know that the twisted pair wires have an insurmountable "100 meters" transmission distance. The max
RJ45-type network cable plug, also known as Crystal Head, is widely used in LAN and ADSL broadband Internet users of network equipment between networks (called five-type line or twisted pair) connection. In specific applications, RJ45 plugs and network cables have two connection methods (line order), respectively called T568A Line sequence (Fig 1) and t568b line sequence (Figure 2). RJ45 type wire plug PIN
range should be measured. (2) near-end crosstalk +: Crosstalk is divided into near-end crosstalk and remote crosstalk (fext). The tester is mainly used to measure next. Due to line loss, the value of fext has little impact. The next loss measures signal coupling from one line to the other in an UTP link. For UTP links, next is a key performance indicator and the most difficult to accurately measure. As the signal frequency increases, the measurement difficulty will increase. Ii. cat5e uns
affected. After removing the gray plastic protective layer, you can see the 4-to 8-core wires of the twisted pair cable, and the colors of each pair are different. Each pair of core wires is composed of a colored core wire and a white core wire with only a few colors. The four full-color cores are brown, orange, green, and blue. Each pair of wires is intertwined. When creating a network cable, you must u
I. coaxial cable Detection1. After the cable enters the water, we have tested the change of Characteristic Impedance. When the cable enters the water due to moisture and the TV signal passes through the cable, the measured level is lower than the specified loss value of the cable
Preparations for building a dormitory Network: network cable production is a physical activity. Introduction of some common network cable knowledge, network cable production RJ-45 line production: First prepare the tools we need: Pressure clamp. ◆ Preparations for establishing a dormitory Network: First extract a short line and then peel off the outer skin (the l
We recommend that you have to go to bbs.52samsung.com to check the products related to Samsung mobile phones. The seller gave me an error when I bought the e638 data cable. I don't know which data cable I bought. He gave me the s308 data cable, but I still want to trust the seller. I did not expect it to be unreliable. Go to the Forum and ask, we used to use the
straight-through cable means that both ends of the crystal head adopt the T568A or T568B connection method at the same time, while the crossover cable adopts the T586A standard at one end of the crystal head and the T568B standard at the other end, that is, 1 and 2 of A crystal head correspond to 3 and 6 of B crystal
Production and Application of direct connection network cable and Cross network cable production and application of direct connection network cable and Cross network cable (cross line) one is the standard of the T-586A, the other is the standard of the T-568B can be directly connected to two computers (NIC-to-nic) Ord
The edge piercing clamp is mainly applicable to connection, branch connection, low-voltage cable entry, Cable Support for Distribution System of T-type connection building, connection of underground low-voltage insulated cable to street lamp system and grounding protection, the applicable voltage levels are 10 kV and below, and their main performance features are
resist external attacks and avoid external harm. Therefore, cable fire prevention has become the top priority. People often say that the fire of water is heartless. Since the fire was discovered by humans, fire not only accelerated the development of human civilization, but also brought destruction to human civilization. How many ancient civilizations were destroyed by the fire. Similarly, a fire can also burn out the Integrated Wiring System to inte
Hand-taught network cable, according to different needs, make practical network cable Main Line (Standard 568b): the two ends of the line Order is the same, the line order is: White orange, orange, white green, blue, white blue, green, white brown, brown.Reverse line ( 568a ): One end is the line sequence of the positive line, and the other end is: white green, green, white
The serial cable can be divided into straight chain and intersection. Generally for straight line extension PC equip, will 2, 3, 5 connect 2, 3, 5, because PC universal male. But the devices are mostly female, so they are just plain, and it can also be used to extend the connection; the crossover PC is connected to the PC with 2 pairs of 3, 3 pairs of 2, 5 to 5, and the general two are female at both ends!Before the computer appeared, the EIA establis
connection between the Hub (switch) and the workstation computer, that is, the scope of the application of "Direct Connection. Iii. Information module jumper rules The patch cord rules of twisted pair cables are introduced above, because in enterprise networks, the cable head is not directly inserted into the hub or switch, instead, the network cable from the hub or switch is first connected to the informa
Intersection line: One is t-586a standard on the other end is the standard of t-568b can be directly connected to two computers (network card to the network card)Ordinary network cable (straight line) at both ends are generally t-568b standardSo: Need a specially made cable, or have a spare line to change it can also be changed only a head. When making the crystal head, the other end of the 1th and 3rd to s
"The perfect solution for the iphone data line not certified" 1, when the use of data lines to charge or connect the computer, if the prompt "this cable or accessories have not been certified, so may not be able to match the reliable work of the iphone", please do not click "Off". 2, unplug the USB connection to the computer, and then plug in (remember: not to unplug the phone's head). 3, at this time "this c
1. Use C programming to check whether the network card is connected to the network cable # Include # Include # Include # Include # Include Int main (){If (check_nic ("eth0") = 0)Printf ("detect OK./N ");ElsePrintf ("detect fail./N ");} // If the network card is connected, 0 is returned; otherwise,-1 is returned.Int check_nic (char * nic_name){Struct ifreq IFR;Int skfd = socket (af_inet, sock_dgram, 0 ); strcpy (IFR. ifr_name, nic_name); If (IOCT
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