aui transceiver

Linux nic (set Nic speed and mode) Ethtool is a command used to query and set Nic parameters. Summary: ethtool ethX // query ethX network port Basic settings ethtool-h // display ethtool Command help (help) ethtool-I ethX // query ethX network port information ethtool-d ethX // query ethX network port Registration Information ethtool-r ethX // reset ethX network port to adaptive mode ethtool-S ethX/ /query ethX network port receiving and receiving packet statistics ethtool-s ethX [speed 10 | 100

Through the previous few posts. We analyzed the AUI cache, the tool class, the display and loading of the code. Today, we continue to study the source code of AUI, the core Auxiliary tool class in learning.I hope you can learn something in it, ha.DownloadTo download a picture, we imagine what we need: first we have to set up a supported protocol. There is a link to download. Download the image by the corres

ObjectiveIn the past few weeks, I have investigated and researched the security of GSM in many aspects, such as the loopholes in GSM communication protocol. In addition, I have a security audit of the most widely used BTS software in the world today. In this article, I'll show you a few of the vulnerabilities I've found in this open source product that will allow an attacker to invade the base station transceiver (BTS) and remotely control its

logic unit/Function Generator74ls382 arithmetic logic unit/Function Generator74ls384 8-bit * 1-bit complement Multiplier74ls385 four-Serial Multiplier/Multiplier74ls386 2 input four exclusive OR gate74ls390 dual-decimal counter74ls391 dual four-digit binary counter74ls395 4-bit general shift register74ls396 eight-bit storage register74ls398 quad 2 Input Multi-Channel Switch (Dual Output)74ls399 quad-2 Input Multi-Channel converter (with select)74ls422 monostable trigger74ls423 double single ste

characteristic impedance Z0 of the transmission line cable. The RS-485 is recommended to use a 120 Z0 cable, so each end of the cable is usually used 120 resistance for end-to-end connection. Figure 4: RS-485 end-to-end using common mode noise filter. Applications in a noisy environment often use two RC low-pass filters to replace these 120 resistors to enhance the filtering of common-mode noise (see figure 4 ). It is worth noting that the resistance values of the two filters should be equal

electrical port and network device interface, or both ends of the device interface duplex mode mismatch. 2 Twisted-pair cable and RJ-45 head have problems, to detect 3 Fiber connection problem, jumper is alignment device interface, tail fiber and jumper and coupler type match etc. 5. Optical transceiver Connection After the two ends can not communicate 1 fiber connected to the reverse, TX and RX-Connected fiber swap 2 RJ45 interface and external

the port specification when purchasing the device. You only need to select the GBIC corresponding to the required transmission interface, and it is easy to make adjustments as needed. The current GBIC has a Small version (Small Form-factor Pluggable, SFP), also known as mini GBIC (mini GBIC ), The size is about half of the original size, which not only saves costs, but also doubles the port density of network devices. Term 3 Small encapsulation pluggable

, to meet the needs of data communication, has a strong application value. 1 Ethernet-based laser wireless communication system The combination of Ethernet and laser wireless communication can give full play to the advantages of the two systems and improve the application range and reliability of the system greatly. Fig. 1 is a schematic diagram based on one end of the Ethernet laser wireless communication system, and the other end of the structure and the end of the symmetrical state. From

). Note that the IP addresses of the two APS must be in the same CIDR Block and the same channel can be used to achieve wireless connection and resource sharing between the two wired LAN networks, or expand the wired network. It should be noted that both APs adopt oriented antennas. Opinion 2: Use optical fiber Many netizens have agreed to this solution, because the current price of fiber optics is also more than 10 pieces per meter, and the cost of pulling fiber cables between two points is no

work of other nodes;G. Twisted Pair wires are generally not installed outdoors. When a small part is installed outdoors, the casing should be installed in the outdoor part;H. Select the eight-core twisted pair wires. When you install the connectors on your own, the eight wires should be installed properly. Do not install only four wires or cut off the other four wires.Iv. Network Device InstallationHub InstallationA. the hub should be installed in a dry and clean room;B. The Hub should be insta

only used in the most basic 10Base-T Ethernet network, but also in the mainstream 100Base-TX Fast Ethernet and 1000Base-TX Gigabit Ethernet. Although the transmission media they use are of the twisted pair type, they use different versions of the twisted pair type, for example, for the first 10 BASE-T to 6 categories that support BASE-TX gigabit speed, the 100Base-TX in the middle uses the so-called five-category and cat-5e lines. Of course, it can also be six categories. These RJ-45 interfaces

Master the high-end switch cascade to instantly become a master of the network, previously introduced the relevant knowledge. After the publication of the stack and cascade of switches, we have received a number of emails from many readers to discuss with us about the cascade of switches. So we will introduce some related content about high-end switch cascade. High-end switch cascade: optical transceiver connection When optical cables are used for cab

termination resistor.Figure 2 shows an example of the SN75LBC176A transceiver Unit load calculation. Because the device integrates the drive and receiver together to form the transceiver (that is, the driver output and receiver inputs are connected to the same bus), it is difficult to obtain the drive leakage current and receiver input current separately. For ease of calculation, the receiver input impedan

types we see, and it belongs to the twisted-pair Ethernet interface type. It is used not only in the most basic 10base-t Ethernet networks, but also in the current mainstream 100BASE-TX Fast Ethernet and 1000BASE-TX Gigabit Ethernet. Although the transmission media they use are twisted-pair types, but they used different versions of twisted-pair types, such as the 3 line used initially by 10BASE-T to support the 6-class line of 1000BASE-TX gigabit, and the middle 100base-tx to use the so-called