db25 to rj45

Ethernet Mac (link layer) +phy (physical layer/rtl8201f,88e1111), integrated DM9000,RTL8139CP because of the large amount of network data transmission, whether it is a separate type or integrated, it usually introduces DMA between MAC and PHY. Mac and PHY are separated because the Mac is part of the digital circuit, and the PHY is part of the simulation, responsible for the data received to the MAC layer, the MAC layer will receive the data transferred to the upper layer protocol, such as the IP

router. If you are a wireless network "prawn", then click on the "X" button on the page because it doesn't help you, but if you are a network of wireless routers "white", then the first lesson will be the key to your study trip, do not miss Oh. 　　Section I: Hardware connections Said the most basic wireless router settings, of course, to start from the hardware connection, do not think this is very simple things, if you will Wan/lan mouth, then all the basic settings can not talk about ...

Asus Rt-n12 is a family-oriented product. Its 300Mbps ultra-high speed, strong signal, and with up to 30000 online number, so that peer-to-peer can download high-speed, to ensure that users have super stable network functions such as online. It can be said that Rt-n12 is ASUS to build a family and small business network applicable wireless network new, will give users a rapid and carefree wireless experience. Asus Rt-n12 is a white-dominated hue, surrounded by white-gray foil. A feeling

removable sliding frame, the user can adjust the height of their own servers flexibly to store servers, hubs, disk array cabinets and other equipment. After the server is placed, all of its I/O line from the rear of the cabinet out (all the interface of the rack server is also in the rear), unified placement in the Cabinet of the slot, the general stickers have labels, easy to manage. General wiring cabinets are generally equipped with removable installation column, free to set the installati

Recently read a lot of forums, there are Xu on the sharing of ADSL internet methods. Left to look at the right, we did not give a relatively simple and stable method. In this, I share the experience of ADSL sharing installation.　　One, hardware connection (server only need a net card)Preparation Material:Operating system: Servers Windows2000 persional or server, Windows Me above (for example, in Windows persional);Client Windows persional or Server, Windows Me versionHardware preparation: Both th

computer networks are super five-type twisted-pair and six-type twisted-pair line. Up to 1000Mbps of bandwidth. Usually we're all RJ45 connectors, it is commonly known as the Crystal Head to connect the twisted pair and network port, which in the use of only eight of the core of 4, for two-way transmission (Full-duplex), according to the network port connection at both ends, there will be straight line, crossover line and rollover three species, The

"Jufeng building" office of the tax quoted price is 4599 yuan, also send package, mouse, mouse pad. Sony S13127CCP (powder) notebook uses pink as the main body tone, the top cover, screen border, keyboard border and palm rest are pink, and chocolate key cap color is white, the logo on the top of the metal style, the machine is very in line with the taste of female users; the machine has 1 USB 2.0, 2 USB 3.0 (one powered-powered USB common interface), HDMI, headphone/MIC interface,

Huawei Optical Fiber switches improve performance through the optical fiber expansion module. Colleagues are responsible for the interconnection of Huawei Optical Fiber switches in the company. This is a very large project. Outsiders will be confused. The following are just some of the issues with Huawei Optical Fiber switches, but for beginners who do not know anything, it is enough for you to have a new understanding of the performance configuration of the Huawei optical fiber switch. ◆ Linksy

Optical fiber Broadband Router Function AnalysisType: HFR-1330N-1-1-1 fiber Broadband Router, wan port to fiber interface, no photoelectric conversion, suitable for small office network www.2cto.com main specifications/special functions: HFR-1330 Optical Fiber router is a high-performance router designed for small and medium-sized enterprise network connection, can provide Four 10/100 BASE-TX g RJ45 port and a 100BASE-FX SFP g WAN optical port, flexib

and remove the wall from the ceiling to each information point. All information points are in a dark box. All integrated wiring products use over five categories of yuefeng cabling, that is, cat5e twisted pair wires, cat5e information sockets, cat5e jumpers, cat5e modules, etc., to provide M data transmission speed, it meets the needs of high-speed Ethernet and ATM network data transmission, thus laying the foundation for high-speed data transmission. The following describes the subsystems of t

The testing environment is 3745 plus a support, vwic-2mft-g703 nm-2w, for this module and card, all ios versions of 37 are supported. Test ring cable used: a common straight-through twisted pair wire, rj45 crystal head rj45 and Micron 48 difference to achieve the line order of which is different), a model for the cab-adpt-75-120 cable, see the figure below for details. First start the router, nm-2w en light

. However, if the indicator light is not on, this interface cannot be used. However, this interface is the only hope. Otherwise, we can only transmit the 41MB IOS using xmodem, I am afraid the transmission time is prohibitive.TIPS:The speed of using XMODEM to transmit IOS is a headache. I used XMODEM to transmit a 2950 switch IOS, with a total capacity of about 2 MB. It took two hours. At this speed, it may take up to 30 hours for 41 MB.Since the use of XMODEM transmission IOS is not realistic,

. For more specific application, you can refer to the following article, this article is to study the FWA-3140 as an example, do an application, address:Http://www.panabit.com/document/panabit_bypass.html Iii. Principle Analysis of Bypass implementation The above briefly describes the Bypass control method. The following briefly describes the working principle of Bypass, mainly from the hardware and software aspects. The research object of FWA-3140 series products of inghua 1. hardware layer. In

? I. zoon's meaning and division principles ???? The function of Zoon in an optical fiber storage switch is similar to that of an Ethernet switch VLAN. It is mainly used to divide multiple logical zones in a switch to prevent storage connections of different applications from initiating broadcast packets, improves the utilization of Optical Fiber switches. ???? In principle, zoon must have at least two nodes, which can be based on the vswitch port or the WWN Number of the Optical Fiber adapter (

different, it is very important to find out the role of each port. The vswitch mainly includes a console control port used to configure Internet access parameters, two RJ45 ports connected to the external network, and four RJ45 ports connected to the internal network, both the Intranet and Internet ports belong to the 10/100 Mbit/s adaptive port. After understanding the role of each port, we can now connec

, ST, and LC. Currently, the common electrical interfaces are RJ45, which are used to connect to twisted pair wires and interfaces connected to coaxial cables. However, these interfaces are rarely used. Fc nic: it is also called an optical fiber Nic. Its learning name is Fiber Channel HBA. The transmission protocol is an optical fiber channel protocol, which is generally connected to an optical fiber channel switch through an optical fiber cable. Inte

flexibility of the patch cord from the distribution frame or device to the cable manager. This allows the jumper to maintain excellent external crosstalk performance while maintaining the same bending radius and cabling flexibility as the non-reinforced jumper. 10G 6A UTP BladePatch is a unique RJ45 patch cord that is pluggable without pressing down an external lock. Patented push-pull internal lock structure. When the plug is inserted into the socke

A Network Transformer will be added in the middle when the Ethernet device is connected to RJ45 through the phy. What is the role of this transformer? Theoretically, transformer can be directly connected to RJ45 without being connected. However, the transmission distance is very limited, and when connected to different levels of Network Ports, it will also affect. In addition, the external interference to t

Introduction to the OSI Layer-7 Model OSI is an open reference model for System Interconnection. It is a well-defined protocol specification. The OSI model has a layer-7 structure, and each layer can have several child layers. Next I will briefly introduce these 7 layers and their functions. Layer 7 of OSI is 7 Application Layer telnet, HTTP, FTP, WWW, NFS, SMTP6 presentation layer encryption, asii5 session-layer RPC and SQL4 Transport Layer TCP, UDP, SPX3 network layer IP, IPX2. data link laye

information. Then, locate a joint position in the window box, and upload a hole to the window box. Wear a lens and put it on the lens of RJ45 waterproof head, and then fill in the crystal head. It seems that the RJ45 outlet of this website is not very standard. I am a golden wave crystal head that is used in all kinds of places, you have to polish it to get stuck. (Do not wear a lens. If it is not waterpro