coaxial multiplexer

First, LAN interface cable standard 10BASE-T: Twisted-pair cable, generally use rj-45 connector, the maximum effective transmission distance is from the hub 100m, even high-quality 5 twisted pair can only reach 150m. Its matching resistance is 120 euro. 10BASE5: Coarse coaxial cable, with insert-type joints, baseband signal, maximum support length of 500m, up to 100. Its matching resistance is 75 euro. 10BASE2: Fine

do not meet the standard of broadband data transmission, there may be some return noise, line crosstalk phenomenon, which will affect the data transmission. Comments: The author of the region only some of the schools closer to the city is equipped with ADSL. This way the cost of investment is very low, but also more stable, just feel the speed of general. Second, cable wired access Advantages: Cable Wired access technology is based on high-quality two-way cable television network, HFC (Hybri

The installation of the LAN starts from the cable, which is the most basic part of the network. According to statistics, about 50% of the network failure and cable-related. It can be seen that the quality of cable itself and the quality of cable installation directly affect the healthy operation of the network. In addition, many cabling systems are carried out in the construction, and cables are laid through pipes, floors or carpets to each room. When the network is running, it is difficult or i

10BASE-T: Twisted-pair cable, generally use rj-45 connector, the maximum effective transmission distance is from the hub 100m, even high-quality 5 twisted pair can only reach 150m. Its matching resistance is 120 euro. 10BASE5: Coarse coaxial cable, with insert-type joints, baseband signal, maximum support length of 500m, up to 100. Its matching resistance is 75 euro. 10BASE2: Fine coaxial cable, the joint

device is used very much like a card, Many people also confuse it with a normal network card or a common fiber optic network card. Of course, some Iscsihba cards can be used as a normal network card, but from the price to consider this is very luxurious. The general definition of HBAs is the I/O adapter that connects the host I/O bus and the computer's memory system. According to this definition, like the video card is connected to the bus and memory, the network card is connected to the bus a

building or a complex, it was often used by different manufacturers of cable, wiring sockets and connectors. For example, a user switch usually uses twisted-pair wires, and the computer system usually uses a coarse coaxial cable or a thin coaxial cable. These different devices use different wiring materials, and connect these different wiring plugs, sockets and terminal boards are not the same, incompatibl

advantages, and each has its own shortcomings.1 Current main access network technologyIn many scenarios, ADSL technology using the original telephone lines, without modification can transmit high-speed data (downlink 12.5-8mb/s, uplink 16-640kb/s), the local Dslam after reuse and ATM network adaptation, is a traditional carrier development network special fancy of the program, But ADSL provides the bandwidth is not too high, the actual use of the opening rate is not high, affecting its large ar

Waveform Transformation of the baseband signal is called (baseband adjustment) (2) The signal after carrier adjustment is called (band-pass signal), and the carrier modulation is called (band-pass adjustment) (AM, FM, and phase adjustment) 4. Maximum channel capacity There are two factors that limit the transfer rate of the code element on the channel: (1) The channel can pass through the frequency range (bandwidth) (2) signal-to-noise ratio (dB) = 10log10 (S/N) (dB) S: Average Signal Power, N:

Talking about Cable Modem broadband access technology and its maintenance when talking about Cable Modem broadband access technology and its maintenance, we need to first understand what Cable Modem?1 Cable Modem the concept Cable Modem is also known as a Cable Modem. It is a terminal device for high-speed data access through the hfc-cable TV network. It consists of a tuner, interpreter, pulse modulated device, processor, and interface. After the Cable Modem is installed on the user end, it can

ends of a line must be made using the same standard. It is best to use only one standard network cable on the same HUB or switch. (2) When only two computers do not use hubs or switches, The 586A standard is adopted for one end of the line and 586B standard is adopted for the other end. Because the Ports 1 and 2 of the NIC are used to send data, while the ports 3 and 6 are used as the receiving data pins. The two different standards correspond to values 1, 2, 3, and 6. (3) No matter how close t

wires and the cost is significantly lower than WiMAX, but over time, once the development of WiMAX significantly reduces the cost, DSL technology will be threatened to be eliminated by WiMAX technology. Ii. WiMAX and Cable Cable Modem technology can be divided into two-way symmetric Transmission and non-symmetric Transmission. The symmetric transmission rate is 2 Mbit/s ~ 4 Mbit/s, up to 10 Mbit/s. The downlink rate of asymmetric transmission is 51 Mbit/s, and the uplink rate is 500 Kbit/s ~ 31

display screen. However, if you cannot transmit the video content to the display screen, everything is blank! In the real world, buildings were built at least in the 1980s S, and are generally not designed for the cabling requirements of the Information Age. Cabling slots and channels are generally crowded. Cables required to support high-definition videos (VGA or XGA at least) (for example, coaxial cables connected at the top of a 5 BNC connector or

To build a new broadband community, we have many options, including the Ethernet access scheme, ADSL access scheme, Cable Modem and hfc-network scheme, and optical fiber access scheme. How should we choose these access solutions? Different solutions vary in application scenarios. Let's take a look at the features of several access solutions. High-speed Ethernet solution In the broadband access technology, Ethernet has become the most widely used local network transmission method. It uses baseba

Different access network solutions have different application fields, and different technologies are used at the same time. Various technical solutions have their own advantages and disadvantages. How to choose a suitable solution, users need to think carefully. To build a new broadband community, we have a lot of options, including Ethernet access network, ADSL access network, Cable Modem, and HFC network, and optical fiber access network. How should we choose these access solutions? Different

I. Optical Fiber1. OverviewThe optical fiber is similar to the coaxial cable, but there is no mesh shielding layer. The center is the glass core of light transmission. In multimode optical fiber, the core diameter is 15mm ~ 50mm, roughly equivalent to the hair width of a person. The diameter of the Single-Mode Optical Fiber Core is 8mm ~ 10mm. The outside of the core is surrounded by a glass envelope with a lower refractive index than the core to keep

cable splitters that provide thoughtful cable protection during installation. The instructions In the box can provide various services or clear identifiers for each room. The box also provides connection ports for various types of distribution frames, and the connections for various distribution frames are easy to install and maintain. Therefore, after the In HouseTM series are packed on the cable end, all types of distribution frames with clear identifiers are displayed, and the cables are hid

With the extensive use of computers, network and Integrated Wiring have naturally become a hot topic. Correct design and layout of a network system not only improves the speed and reliability of communication, but also greatly improves the work efficiency; in cabling, the carrier for signal transmission-transmission media must be used. In a complete and stable network environment, the selection and correct utilization of transmission media are required, it is the basis for the long-term stabilit