coaxial multiplexer

the coarse coaxial cable. It is a "D" Type 15-pin interface, this is one of the most common ports in the ring or bus network. The router can connect to the 10Base-5 network through a coarse coaxial cable transceiver. But more is the use of external transceiver AUI-to-RJ-45), to achieve the connection with the 10Base-T Ethernet. Of course, you can also use other types of transceiver to connect to the 10 bas

What is a video encoder? Video encoders, also known as video servers, enable an existing analog CCTV video surveillance system to be integrated with a network video system. video encoders play a significant role in installations where your analog cameras are to be maintained. A video encoder makes it possible for an analog CCTV system to migrate to a network video system. it enables users to gain the benefits of network video without having to discard existing analog equipment such as analog CC

confidentiality function. At the same time, you can save the cost of purchasing these computer components. When using BootPay attention to what kind of network operating system you use when using ROM, which usually includes boot ROM for NT and boot ROMUNIX, boot ROM for NetWare, etc. Boot ROM boot chips should be purchased by yourself.EPROMIn the past, the old-fashioned NICs were configured with jumpers or DIP switches to set IRQ, DMA, and I/O.Port equivalent, while the current Nic uses softwar

coaxial cable network (HFCs) technology. Due to the tree structure of the network, it has problems such as transmission reliability, noise, and backhaul channel congestion. With the digitization of telecom services and CATV, The FTTC technology combined with interactive digital transmission is the development direction of HFCs. Using the Cable modem technology to achieve broadband business access, the service is also one of the current broadband acce

What is Smart Community cable used? In the construction of digital communities, cable selection is one of the crucial links. Currently, several schemes are adopted: 1. Twisted Pair wires; 2. coaxial cables; 3. optical fiber cables. In terms of practical application, twisted pair wires have advantages over the last two types of cables due to price factors, but are not suitable for video use. In addition, when the theoretical length cannot exceed 100 me

coaxial cable hybrid network (HFCs) systems, Passive Optical Networks, fiber-to-households, and/or roadside. Wavelength Division Multiplexing As new cable TV technologies are emerging, cable TV providers must meet the needs of increasing bandwidth in the network. From the beginning to the center, the bandwidth needs have been resolved by intensive Wavelength Division Multiplexing (CWDM. Recently, the cable TV supplier's system structure has been tran

network distribution environment, therefore, FDDI interfaces are common in backbone network switches. Now, with the popularization of GE, some high-end gigabit switches are also using this interface.　　4. AUI InterfaceThe AUI interface is used to connect to a coarse coaxial cable. In the early days, the NIC was connected to a hub or vswitch to form a network.The AUI interface is a "D" Type 15-pin interface, used in the ring plate network or bus networ

In a LAN, a switch is a very important network device that is responsible for quickly forwarding data frames between hosts. The difference between a switch and a hub is that the switch works at the data link layer and can be forwarded based on the MAC address in the data frame. This chapter introduces the difference between shared Ethernet and switched Ethernet, and finally focuses on the process of MAC address learning to build MAC Address table, and the principle of forwarding data frames.Shar

a polynomial distribution:　　　　　　　　In the document collection, the probability that each word appears is the required parameter, which can be determined by the EM algorithm so that the model is obtained.2. Bayes Unigram model (Bayesian word bag models)In the word bag model, we simply think that the probability of each word appearing in the document is a constant (that is, the probability of each face of the dice), but the Bayes school does not think so, they think that these probabilities should

-to-noise ratio S/n has no upper limit (of course, the actual channel can not be such), the channel limit information transfer rate C also has no upper limit. The transmission rate of information that can be achieved on the actual channel is much lower than that of Shannon's limit transmission rate. The Nyquist theorem indicates that the rate of transmission of the code element is limited;Shannon formula gives the limit of information transmission rate.eg3：电话系统的典型参数是信道带宽为3000Hz，信噪比为30dB

direction, and if any network segment are severed, all network transmission ceases. A host on a bus network is called a station or workstation. In a bus network, every station receives all network traffic (traffic), and the traffic generated by each station have equal Tran Smission priority. Each network segment is, therefore, a collision domain. In order for nodes to transmit on the same cable simultaneously (simultaneous), they use a media access control technology such as car

corresponds to the IEEE 802.3aq published in 2006. Wavelength 1300 nm, the effective transmission distance in the FDDI network and 100BASE-FX network of FDDI 62.5μm multimode fiber installed before 1990 is 220m, while in OM3 fiber can reach 260m, in connection length, it is inferior to the previous 10GBASE-LX4 specification, But its fiber-optic module has lower cost and lower power consumption than the 10GBASE-LX4 specification. 2.6) 10GBASE-ZR Several manufacturers proposed the transmission di

In the construction of digital community, the choice of cable is one of the most important links. At present, several schemes are: 1, twisted pair, 2 coaxial cable, 3, optical fiber. From the practical application, because the price factor of twisted-pair cable has advantages over the latter two kinds of cable, but because it is not suitable for video demand, combined with the theoretical length can not exceed 100 meters (transmission data), so the la