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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
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
"IPhone5S not certified Data cable solution Tutorial" 1, we install a ifile software or PP handset assistant in the computer, then the Apple handset connects the computer to find in the ifile: after System/library/coreservices/springboard.app/zh_cn.lproj,2, after entering, we find the springboard.strings inside.3, we are open by editing, if the hint "may not support this accessory", 4, we can go to this file to edit, delete, save, restart, perfect
A tester can complete the test of copper cables and optical cables, certification and documentation Record Filing automatically calculates the optical fiber margin and passes/does not pass the test results automatically at both wavelengths simultaneously measuring the two optical fiber cables stored in copper and optical fiber cables new model: DSP-FTA440S, DSP-FTA430S, DSP-FTA420S products function high-speed network makes the optical fiber in the construction and campus network environment can
With the rapid development of broadband multimedia service and optical fiber communication technology, optical fiber communication technology has been used more and more widely in the access network. In the past, optical fiber network is mainly to meet the needs of transmission network construction, access to the layer of fiber optic cable needs less, a small number of access layer cable is generally direct
I. Overview The industry has been concerned about the characteristics of network data cable skins, such as whether the skin can meet the standard of flame retardant or low smoke, the presence of a high ignition point, fire resistance, and a halogen with the latter characteristic that releases poisonous gas in the combustion. Network wiring professionals and the vast number of network users even in different regions of the standard organizations, ther
Cables are the main cause of electromagnetic compatibility problems in the system. Therefore, in practice, it is often found that when the external drag cable on the device is removed, the device can pass the test smoothly. When electromagnetic interference occurs on the site, if you unplug the cable, the fault will disappear. This is because the cable is an effi
Integrated wiring system emerged Architectural pursuit of integration, intelligence, broadband, personalized information and communication network, integrated wiring System (PDS) emerged. With the rapid development of FTTB and FTTH technology, the indoor cable has been widely used in the building integrated wiring system (including horizontal and vertical wiring system). because of the special environment of indoor application, the indoor optical
How to differentiate between dual-screen and unshielded Network cables and dual-screen network cable shielding As a part of the Integrated Wiring Design and Construction, the network cable is the basic medium for most information transmission systems. Its importance is self-evident. What is the main role of this article in resolving and shielding the network cable
Introduction With the increasing market demand for symmetric digital cables (hereinafter referred to as digital cables) for integrated cabling, many optical cable manufacturers have begun to develop and produce such cables for this manufacturer to meet market demands. At the same time, the manufacturer found that although the digital cable and the early municipal cable
Basic wire and cable knowledge The manufacturing of wire and cable is completely different from that of most mechanical and electrical products. Mechanical and Electrical Products are usually assembled into parts, multiple parts are installed into a single product, the product is measured in the number of units or pieces. Wire and cable are measured in length. A
The metropolitan area Optical cable line is mainly the pipeline optical cable, supplemented by the aerial and other laying way very few optical cables, its characteristics are: The line section is relatively short, can be divided into local trunking, user access network backbone and user to introduce optical cable, optical fiber
At present, lan construction has been very common, and the integration of Ethernet cards on computers is already a standard configuration. The traces of LAN are everywhere around us. A simple small LAN composed of several computers in the family, large Internet cafes in public entertainment venues, campus networks on campus, office networks in the company, and so on are all examples of local area networks. Although they have various networking modes, the current LAN networking mode is still domi
Overview Easy to use Testing multimode optical fiber at 850nm and 1300nm Wavelength Compact and sturdy tester to ensure on-site use Including optical fiber technical materials, including the latest Optical Fiber Technology Including solid hard carrying boxes FeaturesTo efficiently test and check Multi-Mode Optical Fiber Links, You need to quickly complete the work. All the features you need are in a compact toolkit. Whether you need basic optical cabl
There are many things worth learning about in the Metro optical fiber cable network. Here we mainly introduce the comprehensive comparison of the optical fiber lines in the Metro optical fiber cable network. How to build a Metro optical fiber network? First, it should be based on the network structure of the man. Second, according to the construction idea of the man, the topology of the network should be fl
Ethernet (EtherNet)Originally created by Xerox, the Ethernet was developed jointly by DEC, Intel and Xerox three companies in 1980 as a standard. Ethernet is the most widely used local area network, including standard Ethernet (10Mbps), Fast Ethernet (100Mbps), Gigabit Ethernet (Mbps), and 10G Ethernet, all conforming to the IEEE802.3 Series standard specification.(1) Standard EthernetThe first Ethernet only has a 10Mbps throughput, and it uses the access control method of the CSMA/CD (carrier-l
The application of optical fiber cables in telecommunications and long-distance communication networks has become very popular and mature. In recent years, with the application of Gigabit Ethernet and the gradual arrival of 10-Gigabit Ethernet, more and more applications of optical cables in LAN have been made. In recent years, local area networks, man networks, campus networks, and campus networks have almost all been laid with optical cables, and the proportion of optical fiber cables is growi
Internet access in China has developed very rapidly. It may not matter if many people do not know about cable modem in Internet access. After reading this article, you must have gained a lot, I hope this article will teach you more things. When cable modem uses a cable TV network for high-speed access, the general connection mode is: one end is connected to a com
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