How to build a wireless LAN 300 meters apart

Pulling optical fiber can solve the problem, and it is necessary to use optical fiber transceivers, which is equivalent to replacing the network cable, after all, the effective transmission distance of the network cable is not as far as that of the optical fiber.

300 meters? It's too far, it is recommended to add a signal amplifier (other LAN settings can be set according to the general setting).

What does it mean that the terminal computer is not a wifi motherboard, and there is no built-in wireless network card? Even if you have it, you can't use it, the built-in network card power of the general notebook is very small, and you can't find the signal at all at 300 meters. Moreover, 300 meters cannot be counted as a straight-line distance, and the loss of the signal due to the blocking of the building must also be calculated.

Buy a high-power wireless router, plus a 5dbi gain antenna, and it is better to have a directional receiving antenna for the farthest terminal.

300 meters is also called LAN? You have enough money to install a so-called LAN to install a new server

Bridging and docking through the WDS function of the wireless router. Set the password, save it, and remember that it must be under the same channel.

WDS stands for wireless distributed bridging function: wireless routers extend network coverage through wireless bridging.

Practical objects:1Multi-room family, the main router is in room A or living room, room B signal can be, room C through the wall too much wireless connection can not be connected, you can place a router in room B to bridge with the main router, because the secondary router only needs power supply without wiring, it is very practical for the family after decoration.

2.Different buildings in the community, within 300 meters of each other (500 meters of a good wireless router), as long as it is unobstructed and visible in a straight line, you can use the WDS function of the wireless router to share the network of the two households!

Structure: Primary route A (that is, the route connecting to broadband) WDS secondary route B, secondary route B can continue to WDS third route C, and so on. The WDS bridging technology only enables WDS on the higher-level route and scans for the next-level route.

Two questions:

Problem 1: The wireless router interconnects with the wireless AP.

First of all: set up the wireless router, fill in the SSID number, encryption method and password to remember the above information (you also need to set the LAN port address, turn on the DHCP service to provide services for the wireless LAN);

Then: set up the wireless AP (fat AP mode, of course). Wireless APs generally use two modes (AP bridge mode and client mode).

1, AP mode: Search for and connect to the front-end wireless router (according to the SSID number, encryption method, and password just remembered); Then, set the SSID number encryption mode and password of the AP transmission signal (to provide wireless access function for customers under the AP). The advantage of being an AP mode is that it not only bridges the signal of the wireless router, but also provides wireless access functions to customers under the AP.

2. Client mode, at this time, the AP can be used as a wireless network card, select Clint mode, then search and connect to the wireless router, and then connect the LAN port of the AP to the computer or switch.

The second problem: building a local area network over a long distance.

If the distance is very far, I recommend using long-distance wireless AP, point-to-point transmission to form a LAN (in the case of no blocking, a long-distance wireless AP transmission distance of less than 500 yuan can reach 5 kilometers, if you are only to use wireless and set up a LAN, I recommend using wireless AP, the AP signal in this band is pure and the interference is very small).

Questions about wireless connectivity:

1. Yes; 2. For specific operation, please refer to the wireless AP manual;

3. Go to the local computer city and ask, naturally there are merchants to help.

Other connection methods can use a huge network cable, which can be measured in the field first.

gl！Supplement: The switch can be replaced with a wireless router.

Hehe, it's not difficult, you will be familiar with it a few more times.

After the DLINK route ADSL is no problem to surf the Internet, connect the AP to it and use WPA-PSK encryption.

There is basically no need to set it on the AP.

Other machines are connected to the switch, and the switch is connected with the AP with an integrated line, and the method is: arrange them in order (Class B: yellow-white, yellow, green-white, blue-white, green, blue-white, green, Zongbai, Zong), and then exchange the exchange. I won't write it, just change it myself.

Of course, you can also turn on DHCP on the DLink router, so that other machines can automatically get the IP.

If you want to save trouble, go and buy a wireless router with a transmission distance of 300 meters.

Ask. However, we now only have 9 computers connected to a 300M TP wireless router, and there will often be two computers that cannot be connected to the route, and there are more computers.

TP's wireless router is well known to everyone, a proper low-end product, 6 or 7 to meet the needs of home of course, no problem, it does not need to continue to enhance performance.

If you have funds, you can consider buying enterprise-level products, and if you don't have funds, you can buy a few more routers.

Whether your dual-WAN router can meet the performance of 30 units should also be considered. Performance is still very important, not just be able to access the Internet, for example, the same is a 100M network. In the Internet café, everyone can be together**.

Normal routers. Such an environment is suitable for the use of wireless, short distance, relatively concentrated, and unobstructed.

One of them is set up as a server, and a LAN can be built.

If you place a router in the middle of two offices, you just need to find a placement point that provides power to the router.

Of course, it's connected with a 'network cable' and a 'router'!

Otherwise, what should I do, if you consider the network speed, then add a signal amplifier every 100 meters, so that you can ensure your network speed!

With coaxial cable thick cable, it is theoretically possible to achieve 500 meters of signal attenuation!

If you are willing to spend money, use a "thick cable", which is very fast and costly, about 1500 yuan as a whole, and it is more complicated.

Wireless support can't go that far, and thin cables can't either).

With two hubs and network cables, it is required to have a stable power supply at 100 or 200 meters, the cost is about 500, and the speed can be guaranteed in megaseconds.

The cost is about 900, and the speed can be guaranteed to be 125 megaseconds.

300 meters has reached the theoretical limit of the Ethernet standard.

So there is definitely a need for a relay in the middle, personally.

If you don't consider outdoor interference, you can add a bridge or any active device in the middle to play the role of signal amplification.

If it is between two offices, there must be outdoor wiring.

Coaxial cable should be the best choice.

300 meters with wireless routing must be unstable, it's best not to buy.

Using a wired route for 300 meters is too far away, and the speed will be lost.

The best thing to do is to find a private user between the two offices. If there is this private user connected to the Internet between your two offices, you can connect him to a router, and then both offices are connected to his home, so that there are only two 150-meter network cables, which will not affect the network speed.

This cabling shouldn't be simple, unless it's wireless. But that can't keep up!

If you use a network cable plus a router and an amplifier, you can, but then the cost is high!

Cables, routers, and amplifiers are sold in places where broadband is installed!

But wiring is definitely not simple!

300 meters, if you use 10m or more fiber to access the Internet, or use an external Internet café, it is not much faster to use the internal network, and the cost is high.

。It's definitely a trick... =_=!

After looking at so many methods, the benefits are not shallow. :) you can also try two homeplugs, which use power lines to conduct signals. However, it may not be as fast as the router relay mentioned above, but it is more convenient and cost-effective.

Do you have to sell it in China? ）

Very simple.

Install a switch (also called a splitter) for Internet accessIn the past, I used to use this in all offices, using one end of a network cable to connect to computer A in office room 1, the other end to connect to a socket of the tap, and use another network cable to connect one end to computer B in office room 2, and the other end to connect to a plug-in of the tap.

In this way, the two computers are connected together through a splitter. That's it"Net"There is no connection to the extranet. You can then put the files you want to share on your computer in their own shared files.

After connecting in this way, you need to set each computer to the same team name, and you can use the online neighbor to connect and view it at any time.

The splitter is very cheap, generally tens of yuan, and the expensive is not enough for a hundred yuan.

The preferred option: buy a cable modem in each office and use the same coaxial cable used in cable TV for about a dollar per meter. The downlink rate can reach about 70 Mbps, which is close to the 100 Mbps of the LAN.

The function of cable modem is to modulate the data of the network cable into the signal that can be transmitted by the coaxial cable, it is recommended to buy a Motorola, the specific model and parameters you can check on the Internet according to your needs, ** in the range of 300-2000.

Alternative: A router (cheap, less than 150 for the cheaper, better ones) is placed in the middle of the two offices, and you only need to find a placement point that provides power to the router.

It is not recommended to use wireless routing: it is slow and prone to packet loss.

Buy an unlimited route and give it a try.

There's no internet, there's no wireless for that long distance.