What are the ways of long range LAN connection ?

Black_Maze · Nov 9, 2013

I'm looking for 20 km or 16 miles long connection. Just want to know how can you achieve that distance and if you add the price of those systems, I'll be very thankful to you.

[Optional]
One more question...when you connect an ethernet cable to leds (each 2 +ve -ve wire for each led) , what will the leds do ? will they glow continuously or will they blink ? And how much volt and amp do those cables carry when sending a signal through computer ?

Nicky AB · Nov 9, 2013

Ok so you cant use LAN for this matter (you can use a alot of repeaters if you are going to use LAN. You can use a MAN and you will get a 50KM range.

I dont know how to setup these types of networks (except LAN) so another user has to answer the rest.

bill001g · Nov 9, 2013

What exactly the leds do vary a lot form device manufacture to manufacture. To get the details of ethernet there are wiki pages that describe the rules. This is all based on a IEEE standard. In general ethernet works by measuring a differential voltage between the 2 leads in a pair. There is extremely little current passed unless you have PoE ports and that is a totally different method to get it to even turn on.

To go 20km you must use fiber if you want any speed. There are copper solution but they are telco types of solutions..ie t1 or e1 type stuff. The equipment is not real expensive maybe $500 total for a couple gig switches with the proper optic. Even the fiber itself is not horrible expensive. What is outrageously expensive is getting the fiber buried. If you would own the land all the way and there were no roads ect you would still have to pay someone to dig a 20km trench. When you start needing to go though a city just the permits will cost thousands of dollars and then the costs or horizontal boring. You could easily be looking at half a million dollars to run 20km.

If you are realistically thinking about this your best bet is to contact the cable companies and see who leases dark fiber in your area. You could then have short parhs run into your building to the nearest provider point. Still you should expect a charge of near 10k/month for the lease.

Black_Maze · Nov 9, 2013

bill001g :

What exactly the leds do vary a lot form device manufacture to manufacture. To get the details of ethernet there are wiki pages that describe the rules. This is all based on a IEEE standard. In general ethernet works by measuring a differential voltage between the 2 leads in a pair. There is extremely little current passed unless you have PoE ports and that is a totally different method to get it to even turn on.

To go 20km you must use fiber if you want any speed. There are copper solution but they are telco types of solutions..ie t1 or e1 type stuff. The equipment is not real expensive maybe $500 total for a couple gig switches with the proper optic. Even the fiber itself is not horrible expensive. What is outrageously expensive is getting the fiber buried. If you would own the land all the way and there were no roads ect you would still have to pay someone to dig a 20km trench. When you start needing to go though a city just the permits will cost thousands of dollars and then the costs or horizontal boring. You could easily be looking at half a million dollars to run 20km.

If you are realistically thinking about this your best bet is to contact the cable companies and see who leases dark fiber in your area. You could then have short parhs run into your building to the nearest provider point. Still you should expect a charge of near 10k/month for the lease.

Nope...that price is way out of this universe for me...
I've seen that there are wireless solutions like 'Air Max', they set up dishes and get connection up to 40 km...can you give me little bit more information on that ?

bill001g · Nov 9, 2013

Yes you can use point to point wireless. The key issue here is clear line of site. You must be able to see the other end clearly with nothing in the way. The next problem is you must worry about the curve of the earth at those distances and the spread of the signal beam. This is called fresnel zone. What this means is you likely are going to need some pretty big radio towers on each end. I would bet over 50ft but if you have a large building in the way or large trees it may be even more. The calculators I found told me 100ft but I may have entered the data wrong. A 50ft self standing tower is about $1500 and the 100ft on is about $4500 but that is just the tower you need big holes full of concrete and it depends if you dig the holes and mix the concrete yourself or pay someone. I would suspect at least another $1000 for the concrete.

Black_Maze · Nov 9, 2013

bill001g :

Uhm...I asked about the radio, not the radio towers....
And don't worry about the height, I'll find my own ways.
Just tell me about the radio (cheaper would be better...if possible)

bill001g · Nov 10, 2013

The brand you mentioned is fine you just have to find ones that are rated for the distance you want. The radios cost nothing compared to the towers which is why i went there. I can promise it will not work without towers or very tall buildings on both ends.

Black_Maze · Nov 10, 2013

bill001g :

I also found these.
Costumers say that they give up to 3 bars signal at 10 miles range with out any obstacles. If I use both of these at each end, then I might get a 5 bar signal only for 38 dollars ! But not sure if I should try these because these are Chinese products, and you never know when they get broken down....What do you think ?

bill001g · Nov 10, 2013

What a joke. There are toys designed to look like direction antenna. The key to knowing its a lie is they do not provide graph that show the output pattern of the antenna. Go to ubiquiti site and look at the antenna graphs they have. Also look at the physical size of the antenna. Most ones to go the distance you want are huge, the best ones are like 2ft x 4ft. This toy has a 6 inch so called dish. I suspect it is plastic decoration and completely non functional.

I have used the smaller airgrid antenna from ubiquiti that cost about $70 each but I would never try to go 20km with them. The other thing in the fine print you have to watch for is it may go 20km but only at 1mbs or something. To get say 10mbs you may only be able to go 10km.

Black_Maze · Nov 18, 2013

bill001g :

Okay, so I've found one, which looks good and doesn't look like 'toys' (and also lot cheaper than ubiquiti). How is it ?

And also, I want to know about this. Do you think that this actually works ? and I live in a city, that's why I have some doubts on its ability to catch wifi in a densely populated area. so, should I try it ?

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What are the ways of long range LAN connection ?

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