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DWDM/CWDM interface to work with optical transmission. The performance was constantly improved. It supports RPR networking technology, MPLS, and fast Spanning Tree Protocol, the integrated data, voice, and video services that can be managed and Intelligently Based on the IP platform will be gradually implemented, qoS, security, content distribution, MPLS, and other business features and solutions support will be the ultimate direction of Ethernet dev
"Water peaks", the entire band from 1, 260nm to 1, 620nm can be used, and through the use of economical and practical coarse Wavelength Division Multiplexing (CWDM) technology, data transmission rate can be expanded in the future and other services can be provided. When the data center needs to be quickly configured or reconfigured, The SYSTIMAXInstaPATCHPlus system is undoubtedly the best choice. It has the features of high density, factory connecti
, but rather a straight line, that is, the line sequence at both ends of the jumper is identical, but it does not mean that as long as the line sequence is the same, for the 100Mbps network uses 100Mbps Exchange method, Refer to the previous chapter of this tutorial for details. One more note is that the cascade between the hub devices is usually done through a cascading port, and that the interconnection between routers and hubs is done through a normal port. In addition, the router and hub dev
Topic Links:ah haha, dot me dot MeTest Instructions:A region of the Arctic has n villages (1≤n≤500), each of which is represented by a pair of integers (x, y), of which 0≤x, y≤10000. In order to strengthen linkages, it was decided to establish communication networks between villages. The communication tool can be a radio transceiver, or it can be a satellite device. All villages can have a radio transceiver
transceiver lamp "Normal", the user is God, I believe you once, but still not pass ah, suspicion is the user firewall or internal network problems, let users restart equipment, and then contact the user. The phone rang again, looking for someone, OK! Give a turn, just hang up the phone, telecommunications pass to the phone, ask us to do not network export access, I said do not need, this brother really dedicated, have to grind with me, I am anxious!!
fault phenomenon cannot clearly determine whether it is a software fault or a hardware fault, and there is no comparable device for reference. Therefore, the comparison method and replacement method cannot be used, and only the exclusion method can be used for troubleshooting. Because the fault is related to the call and has nothing to do with the user and does not affect other calls of the user, the user circuit and switching system factors can be ruled out. However, according to the call proc
through specific software. Next, let's take a look at the router's LAN and WAN connection ports.1. LAN interfaceAccording to the interface name, we can see that these interfaces are mainly used to connect routers and LAN, because the LAN type is also diverse, therefore, the LAN interface type of the router may be diverse. Different networks have different interface types. Common Ethernet interfaces include AUI, BNC and RJ-45 interfaces, as well as FDDI, ATM and optical fiber interfaces, the fol
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
signals for transmission in optical fiber. It uses optical fiber transmission devices mainly for video optical terminals and optical fiber transceiver. The video optical transceiver is mainly used for analog camera signal transmission. It has low signal loss, low noise and distortion, and high transmission quality, suitable for long-distance transmission. Fiber optic t
first out queue) FISC (fast Instruction Set Computer, fast Instruction Set Computer) Flip-chip (chip reversal) Flops (floating point operations per second, floating point operation/second) FMT (fine-grained multithreading, pure multi-thread elimination) Fmul (floationg point multiplication, floating point multiplication) Fprs (floating-point registers, floating point register) FPU (Float Point Unit) Fsub (floationg point subtraction, floating point subtraction) GfD (Gold finger device, Gold fin
Chapter 3 LAN principlesLAN technology mainly corresponds to the physical layer and data link layer of the OSI reference model, that is, the network interface layer of the TCP/IP model. The physical layer of a LAN specifies the physical and electrical properties, mechanical properties, and connection labels of devices, cables, and interfaces that provide services to the LAN. Common such standards include: For 10BASE5 coaxial coarse cable and transceiver
Debug fiber Interface interface with FPGA:Due to the needs of the project, the previous period of time debugging the optical fiber interface, recording some design experience.In the design, FPGA is used to control optical fiber module to complete the transmission of optical fiber data, FPGA uses Xilinx company's Spartan6 lx45t, because of its internal 2 GTP transceiver, can be used as a variety of communication protocol (Gigabit Ethernet, Pci-e,sata,
protocol stack send function, to achieve data wireless transmission③ Receive: Receive node calls the protocol stack wireless receive function, realizes the wireless data receivesSince the protocol stack encapsulates these functions, it is convenient for us to use them. Here is the protocol stack wireless send function:A better application of the protocol stack requires a detailed understanding of the specific role and significance of these functions and their parameters provided by the protocol
are no special application requirements, it is advisable to select the device in these two companies.Hardware Resources for 5.1.2 devicesHardware resources are important criteria for device selection. Hardware resources include logical resources, I/O resources, cabling resources, DSP resources, memory resources, phase-locked loop resources, serial transceiver resources, and hard-core microprocessor resources.The need for logical resources and I/O res
number of tasks of Integrated Wiring. However, twisted pair wires have weak anti-aging capabilities, and only one image can be transmitted at a time. Therefore, it is suitable for video surveillance of network cameras in medium and short distances, with relatively scattered camera points, or with relatively close but concentrated points, such as banks, hotel chains, supermarkets, or university campuses. Optical fiber.Optical Fiber Transmission has the following advantages: long transmission dis
parabolic surface, so that the antenna is located in the parabolic surface of the internal reflection focus, through the electromagnetic waves reflected in the focus of the formation of energy concentration, thereby enhancing the electromagnetic signal transceiver, To achieve enhanced signal in a specific direction. The key to making a simple gain antenna is to find a more regular metal parabolic surface and compute the focus position of the parabo
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
multicast distribution service, is a broadband point-to-point access system that can access voice, data and video services. LMDS system using millimeter wave transmission, working in the 20-40ghz band, can provide up to 155.52Mbps user access rate, known as a "Wireless optical fiber" access system. In addition, the LMDS system supports all major voice and data transmission standards, such as ATM, TCP/IP, and MPEG-2.The *LMDS system adopts a kind of honeycomb structure configuration, by which on
Vro interfaces are very important for network connection and routing functions. Here we will give a comprehensive explanation of vro interfaces and connection knowledge. A vro has powerful network connection and routing functions. It can be physically connected to a variety of different networks, which makes the router interface technology very complex, the more high-end router interfaces there are, the more network types it can connect. Vro ports include LAN ports, WAN ports, and configuration
channels are supported. The new-generation ADSL access technology supports up to four bearer channels and four delay channels, while the first-generation ADSL supports up to three bearer channels and two delay channels ). You can configure the frame structure latency and bit error rate (BER. The first generation of ADSL access technology has a fixed error code of 10. Because the BER is fixed, the line must maintain this BER indicator from start to end. Once the BER is greater than 10, the speed
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