In the formation of local area network, in accordance with the general wiring of generic specifications, the construction should be used with "rice standard" network cable or on both sides of the crystal head set dedicated "special-shaped number", and in the cabinet to do with "rice mark" or "Number tube" corresponding to the computer identification record Many units have a small number of original computers, later, gradually added some computers, com
The energy-saving effect of the frequency conversion device is very obvious. The variable-frequency speed control motor is used in the high-power motor, and the entire generator set can save energy by 30%. After variable-frequency speed control is used, the soft start of the motor is realized to ensure smooth operation of the motor, reduce the wear and tear of the motor bearing, and prolong the service life and maintenance cycle of the motor. Therefore, variable frequency speed control technolog
As we all know, the network cable is one of the most basic hardware facilities for us to access the Internet and the most inconspicuous equipment. We are used to purchasing a ready-made network cable. We seldom care about how the network cable is made. We only know that the network cable must be composed of eight cores
A sound video transmission design is a very important part of the CCTV system. If a set of built systems choose cameras, lenses, monitors, and video recorders that can produce or process high-quality images, but there is no good transmission system, eventually, the images seen on the monitor will not be satisfactory. According to the "barrel rule", the final image quality will depend on the worst part of the entire system, which is often the transmission system. System designers and installers m
Now is a network of the world, the network to hundreds of millions of computers, notebooks, tablets, mobile phones together. The network connection way, divides into wired and wireless two kinds. Wired connections are basically connected by a network cable. So it is necessary to know the network cable.
One, the network cable, also known as twisted pa
Detailed explanation of cable connector
A lan is to connect individual computers or terminals using networks to exchange information and share resources according to certain protocols. Commonly used network cables include twisted pair wires, coaxial cables, and optical fiber cables. Twisted Pair wires can be divided into shielded twisted pair wires (STP) and unshielded twisted pair wires (UTP) based on whether they are added with the screen layer of a
The access network system is widely used and has been well developed in various fields. It also plays an important role in cable TV return. After more than 20 years of development, China's cable TV network line is now more than 3 million kilometers in length, the optical fiber trunk line reaches 0.26 million kilometers, and nearly 2000 counties have opened cable
Overview
Verification-check whether the bandwidth of the existing cabling system supports voice, 10/100, VoIP, or Gigabit Ethernet
Fault Diagnosis-shows why the existing cabling system cannot support network bandwidth requirements, for example, there is a crosstalk at 11 meters)
Search-detect the device connected to the other end of the cable and display the device configuration speed/duplex mode/line pair)
Identifies unused switch ports for easy
Make the hub port indicator flashing test 10/100 Ethernet uses time domain reflection technology TDR) to measure the cable length and fault distance. A network testing instrument that combines multiple test functions to test the functions of the UTP or coaxial cable product when a twisted pair or coaxial cable site is added, moved, or changed. Whether you are an
The horizontal cable manager is mainly used for cable connections between adjacent units and devices in the cabinet. It has a combination of 1U and 2U, single-sided and double-sided cables, covered cables, and no-covered cables. Cables can be accessed from left and right, up and down, and some of them can also be used for frontend and backend access. The vertical cable
-tube unit
A micro-tube unit is composed of a silicon core layer added to the inner wall of HDPE material. Generally, the inner wall with a diameter of more than 5mm has a flow channel, the inner wall of the microtube diameter below 5mm does not have a flow channel. At present, the external diameter of the micro-tube generally ranges from 3mm to 16mm. The number of fiber cores that can be accommodated in one microtube ranges from 1 core to 288 cores or even higher. When the optical fiber single
the first time he came, he could use the cable jack, presumably I have a signal here. The last session of the affirmation has been passed, always do not go and later also sealed off. While there are days bedroom no one, I put that laptop cable to my side a try, sure enough there is a signal! Suddenly came to the spirit, feel a hope! Perhaps you will say, it is impossible to connect the network
This article Reprinted from: http://www.infomcu.com/Program/20071007/455_2.html
Abstract:Download cables are widely used in the design and debugging of electronic systems. This article introduces its basic principles and programming control methods. For the list instances of the current single-chip microcomputer's ISP serial programming mode, it briefly introduces the serial programming method and part of the protocol of at89s5x, using VC programming, the application download
1, the production of network cable, the first is to prepare materials, tools, etc., we need materials, tools have a suitable length of twisted pair, a number of RJ45 crystal Head, a twisted pair of wire crimping pliers, twisted pair tester;
2, twisted-pair connection method has two kinds: normal connection and cross connection, the normal connection uses is the international Eia/tia 568B Standard, but the cross connection uses is the inte
I believe everyone is not satisfied with the charge speed of their mobile phone, always hope to make time shorter, charging more quickly. Recently, a project named Doubbletime appeared on the Kickstarter. It is a USB cable for a smartphone device, capable of filling the phone with electricity half the time with a regular USB cable.
A conventional USB cable
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 number Identification method is: Hand to get
1. Introduction to return loss indicators
Ripple loss is an important indicator of digital cable products. Ripple loss combines two kinds of reflection effects, including the deviation of nominal impedance such as 100 Ω and the influence of structure, used to characterize the performance of a link or channel. It is caused by the non-uniformity of the characteristic impedance of the cable length. It is caus
Rats are widely used in various regions of the world as a type of rodents with strong fertility and vitality. Because of their well-developed and constantly growing population, as a result, rats have the habit of keeping their teeth sharp by biting objects. The unique smell of plastic makes plastic a common biting object.
Whether it's in the wild or in the human activity area, the mouse has a strong damage to the wire/cable jacket or insulation layer.
Ribbon cable
A fiber optic cable that is machined by a plurality of single fiber fibers, which are colored, stacked into strips, and two times molded. There are two kinds of optical fiber, namely the encapsulation type and the side-viscosity type, the former can withstand transverse pressure, the latter thickness is thin. Each band can have 4, 8, 12 or 16 fiber. In-band fiber spacing is 0. 28mm (for 4, 8)
Cutting-edge Cable TechnologyAdd the colored optical fiber and oil paste to the rubber sleeve tube made of high modulus plastic at the same time, the optical fiber can be moved in the casing. The cable core is made by adding a strong core along the center of different cable casings. The cable core and protective materi
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