How to network two locations through 130m of trees

Question

I want to network two locations. Their physical distance is around 130m (418 feet) and it is covered with trees. The target link speed should be at least 10Mbit.

I have considered using UTP but its max distance is around 90-100m, also it is not possible to add a switch in the middle, in order to clear/increase the signal.

I am thinking of a WiFi solution using directional antennas with high gain.

Here is a map (from Google). The spots in the map are the exact locations where the hardware will be inside each building, so it is not possible to set the antennas far from there.

Also, note that trees are tall and it is not possible to see the other side even from the roof.

Is it possible to link them using regular hardware (max budget 150€, routers not included)? If you've done something similar please share the hardware used.

Answer 1

The Wikipedia article on Ethernet extender summarizes your possible choices.

I have considered using UTP but its max distance is around 90-100m

That distance restriction is only for Ethernet.
You however are not restricted to using IEEE 802.3 Ethernet for the physical layer.

If you could actually lay UTP cable between the two sites, then you have other choices that utilize the UTP such as T1, HDSL, VDSL etc. But those technologies typically use telco-grade (i.e. expensive) equipment. There are units like this point-to-point extender for self installation, and there's lots of used telco stuff on eBay.

Note that xDSL solutions require only voice-grade copper.
If you want to lay Cat5, the 100m restriction of Ethernet can be overcome with an inline repeater powered by POE, such as this although such a device would require weatherproofing.

Answer 2

Yes. However, it will require some work, and 130m of low loss Cat6e burial grade cable would be far simpler; experience has shown you can get more than 100m with good cable, sans repeaters.

Anyway you will need two high gain antenna attached to the wifi cards or adapters on each end. Each is very carefully aligned and solidly built (wind is not your friend) to point to a passive repeater, which is a pair of high gain antennae connected to each other back-to-back. The passive repeaters pickup signal and send it out again, aimed at the other passive repeater.

PC1 - wifi card - higain antenna - passive repeater 1 - passive repeater 2 - higain antenna - wifi card - PC2

You're now on the verge of being able to use active repeaters, powered off solar cells with batteries, depending on the insolation at your location; but those trees look healthy, so I believe they're getting quite a bit of sunshine, no?

Answer 3

If a 10 Mbit/s link speed is really acceptable, you could use 10-base-2: Ethernet over RG58 cable. The maximum cable length is 185 m so you have plenty of margin within the specs. Direct burial cable is available.

You will need to acquire two old Ethernet hubs, each with 10-base-2 interfaces. These will have one or a few RJ45 jacks (limited to 10 Mb/s) on one side and a BNC jack on the other. Of course, you will use patch cables to connect each of them to a port on one of your existing 100 Mbit or gigabit switches. (This will not slow the rest of your network to 10 Mbit/s.) Or if you have only one machine at the far end just cable it right into the BNC-equipped hub.

Then you'll need whatever length of RG-58A/U cable for the run, terminated with BNC male connectors; two BNC "tee" adapters (these will have one male and two female connectors); and two 50-ohm BNC male terminators. The "tee" connectors and terminators are required. Do not simply run the RG58 cable directly from one hub to the other.

This cable is 50 ohm impedance. Do not try to use RG-59 or RG-6, both in common use for cable TV, baseband video, and digital audio - those are 72 or 75 ohms. They won't work reliably.

At one end only, ground the terminator to the building electrical service ground. (You can get terminators with pigtail leads or other connection points to facilitate this.) Don't let it float, and don't ground it at both ends.

A major concern here is that almost all (maybe all) hubs with 10-base-2 ports are out of production and you will likely have to go with either used ones, or new ones that are made for a very small market (so they will not be cheap). Should they fail, you will have similar issues acquiring replacements. On the other hand the technology is tried-and-true and you will be using it well within its limits.

https://en.wikipedia.org/wiki/10BASE2

http://www.thenetworkencyclopedia.com/entry/10base2/