<p dir="ltr"><br>
On Mar 22, 2014 9:25 PM, "Nicolás Echániz" <<a href="mailto:nicoechaniz@altermundi.net">nicoechaniz@altermundi.net</a>> wrote:<br>
><br>
> El 04/07/13 05:00, Joseph Bonicioli escribió:<br>
> > Links of that distance are very common in our network (AWMN). Attika in<br>
> > Greece is not flat resulting to many links that are over 10 20 or even 50Km.<br>
> > Moreover since we got access to TV channel installations we have a lot of<br>
> > long distance links to other areas of Greece and with other wireless<br>
> > communities . It will be pointless to point some out. They are many and I<br>
> > own a couple of them.<br>
> ><br>
> > Do not over analyze. Maths never fail you (FSL calculations) and rocket<br>
> > dishes are fine for 40Km. With 34dbi dishes at both ends you will get -71db<br>
> > signal with no Tx power at all. If you add 5-10db Tx power you will be well<br>
> > in the good performance zone of -61 to -66.<br>
> > If you are in a noiseless environment you will be thrilled to find that the<br>
> > performance will be "just" as good as in your test room.<br>
> > You can also find cheaper alternatives. Get yourself a couple of good solid<br>
> > reliable 120cm offset dishes, a couple of feeders that we can provide you if<br>
> > you need to and you are ready.<br>
> ><br>
> > On the other hand don't consider anything less than the biggest gain<br>
> > (biggest dishes) and most reliable hardware you can get. You will have to<br>
> > compensate for bad weather in the winter making the link harder due to<br>
> > conditions, harsh environment may punish hard you equipment and of course<br>
> > unreliable hardware/software will make you travel a lot. The difference<br>
> > between some extra cash for something a bit more reliable and traveling<br>
> > expenses is big.<br>
> ><br>
> > And don't worry about details like alignment. Those things nowadays if you<br>
> > have not broken something in your equipment are a breeze with the tools that<br>
> > you get.<br>
> > Plan for other details if you are going somewhere far or on a mountain.<br>
> > Cables, extra tools, insulation material, things that make your life and the<br>
> > experience pleasurable, communication equipment, ropes, toolboxes, people :)<br>
> ><br>
> > Go play, take some pictures and let us know the results! Good luck!!!!<br>
><br>
><br>
> We finally got around to finishing our first long distance (50Km) link<br>
> and it's working great.<br>
> Thanks joseph for the hints and optimism :)<br>
><br>
> We published a small blog post (in spanish and english):<br>
> <a href="http://blog.altermundi.net/article/completamos-el-enlace-de-50km/">http://blog.altermundi.net/article/completamos-el-enlace-de-50km/</a><br>
><br>
> with some details on link conditions, quality and photos.</p>
<p dir="ltr">I am impressed. Was the link really 50 Mbit in both directions simultaneously? Are you using airos or OpenWrt?</p>
<p dir="ltr">Got Bufferbloat? What does a rrul test look like? (See netperf-wrappers)</p>
<p dir="ltr">How well does it work in rain?</p>
<p dir="ltr">> Cheers!<br>
> Nico<br>
><br>
><br>
> ><br>
> > -----Original Message-----<br>
> > From: <a href="mailto:battlemesh-bounces@ml.ninux.org">battlemesh-bounces@ml.ninux.org</a><br>
> > [mailto:<a href="mailto:battlemesh-bounces@ml.ninux.org">battlemesh-bounces@ml.ninux.org</a>] On Behalf Of NicoEchaniz<br>
> > Sent: Monday, June 17, 2013 4:41 AM<br>
> > To: Battle of the Mesh Mailing List<br>
> > Subject: [Battlemesh] recommendations for 40Km Link<br>
> ><br>
> > Hi guys,<br>
> ><br>
> > Here in Quintana (Argentina) we are planning a 40Km link to connect three<br>
> > community networks in the region to the nearest Internet Exchange in Cordoba<br>
> > City.<br>
> > Our longest link so far is 16Km and it works very well (40Mbps) using<br>
> > AirGrid M5 27dbi.<br>
> ><br>
> > For this occasion we are planning to use Ubiquiti Rocket M5 + 34dbi dishes.<br>
> > There is clear LOS between both ends; link calculation seems fine but I'd<br>
> > like to ask about your experience with this kind of long shot high<br>
> > performance links.<br>
> ><br>
> > Any recommendations based on real-world deployments?<br>
> > Are you using these Rocket routers for long links?<br>
> ><br>
> ><br>
> > Cheers,<br>
> > Nico<br>
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</p>