When the decoration was completed, the cable was not pulled in place? Before I talked about wireless WDS bridging, this article provides another solution —— power cat (power adapter). When we see the cat in the power cat, we should probably understand what is going on. Modem, Chinese called modem, commonly known as "cat". The role of a cat is to convert (modulate) one signal into another medium, and the other party receives the signal and converts (demodulates) it into the original signal. The ADSL broadband cat that we often see is the cat that transmits signals on the telephone line and converts the signal transmitted on the network line; the light cat is the cat that converts the optical signal and the network signal. The power cat is naturally a cat that converts between the network signal and the signal on the strong electric line in the home. The technology for transmitting the network signal on the strong electric line is PLC (Power Line Communication), that is, power line communication. Since it is a cat, there is a modulation side, there must be a demodulation side, so the power cat needs at least one pair. Here, Baoyun will call this pair the main cat and expander for the time being. The main cat has at least one network cable interface, which is used to connect the ADSL cat, optical cat, router or switch network cable; some main cats also have a LAN port (LAN port), which can be directly connected to the router, switch or The computer is wired. Most of the main cats are a small router, but this router will simultaneously convert the network signal into a power line signal and send it to the strong wire. Let's go one step further, a main cat with router function, and then add her wireless function, it becomes a wireless router nature of the main cat, tp-link HyFi products are of this nature (the main cat is also called wireless The router is up). Since it is equipped with a wireless router function, there is no need for an expander, and a separate main cat can be used. Let's talk about the expander. There can be only one expander or multiple, that is, one main cat with multiple expanders. The expander can be plugged into any socket and panel under the same meter, thus achieving the purpose of not extending the network cable or using wireless bridge to expand the network coverage. The main cat and the expander need to be paired “, the matching method is not the same for each brand, and the friends carefully read the manual. There can be multiple main cats and multiple expanders under one meter. After pairing, do not interfere with each other (specify different network names in the configuration management interface), but the actual use effect is not tested, and you can't talk about it. The expander usually has a network port, which can be connected to a computer, a router, a switch, etc.; also has a wifi function attached to the expander. After the wifi function is added, the SSID is usually the SSID number on the main cat, and does not need to be separately configured. The main cat and expander with wireless router function also has a management configuration interface. This configuration interface is on the main cat. The expander generally does not need to be configured (only need to be paired). We have already understood the role of the power cat and the features that will be added to the products on the market. Next, we will talk about some problems and precautions that will be encountered during the actual use. The stability of the power cat depends largely on whether the signal of the strong power is pure. If the home needs to switch the high-power electrical appliances frequently, and often plug the plug on the socket, etc., the power line signal will have a large interference, so the manufacturer's manual is generally It is recommended that the main cat and extender be plugged into separate panels to minimize interference. But even then, there will still be time to drop. This is also the main problem of current power cats. In short, the power cat has certain requirements for the strong electric environment. This is also the reason why some people feel good and some feel bad. In addition, power cats have the difference in data transmission speed on the power line, such as 200M, 300M. If you have wireless capabilities, the manufacturer will also provide wireless speed indicators. Power cats between different brands, some can be mixed, the manufacturer's instructions are generally noted. Finally, if you plug the power cat into a filter-equipped power strip, this can be a disaster because the signal from the power cat is filtered out by the patch panel filtering function or causes serious interference. This article comes from [system home] www.xp85.com Related articles recommended: 1. How to remove WiFi barriers, enhance WiFi signal 2. Wireless router and portable WIFI signal transmission distance 3. Make WIFI signal more stable! WIN7 wireless hotspot setup tutorial