[Battlemesh] recommendations for 40Km Link

Mitar mitar at tnode.com
Thu Jul 4 08:09:03 UTC 2013


Hi!

And don't forget to have a BBQ once you are on the top of the mountain
and you deployed your first link. :-)

And yes, share photos and experiences afterwards!


Mitar

> Links of that distance are very common in our network (AWMN). Attika in
> Greece is not flat resulting to many links that are over 10 20 or even 50Km.
> Moreover since we got access to TV channel installations we have a lot of
> long distance links to other areas of Greece and with other wireless
> communities . It will be pointless to point some out. They are many and I
> own a couple of them. 
> 
> Do not over analyze. Maths never fail you (FSL calculations)  and rocket
> dishes are fine for 40Km. With 34dbi dishes at both ends you will get -71db
> signal with no Tx power at all. If you add 5-10db Tx power you will be well
> in the good performance zone of -61 to -66.
> If you are in a noiseless environment you will be thrilled to find that the
> performance will be "just" as good as in your test room. 
> You can also find cheaper alternatives. Get yourself a couple of good solid
> reliable 120cm offset dishes, a couple of feeders that we can provide you if
> you need to and you are ready.
> 
> On the other hand don't consider anything less than the biggest gain
> (biggest dishes) and most reliable hardware you can get. You will have to
> compensate for bad weather in the winter making the link harder due to
> conditions, harsh environment may punish hard you equipment and of course
> unreliable hardware/software will make you travel a lot. The difference
> between some extra cash for something a bit more reliable and traveling
> expenses is big.
> 
> And don't worry about details like alignment. Those things nowadays if you
> have not broken something in your equipment are a breeze with the tools that
> you get.
> Plan for other details if you are going somewhere far or on a mountain.
> Cables, extra tools, insulation material, things that make your life and the
> experience pleasurable, communication equipment, ropes, toolboxes, people :)
> 
> Go play, take some pictures and let us know the results! Good luck!!!!
> 
> -----Original Message-----
> From: battlemesh-bounces at ml.ninux.org
> [mailto:battlemesh-bounces at ml.ninux.org] On Behalf Of NicoEchaniz
> Sent: Monday, June 17, 2013 4:41 AM
> To: Battle of the Mesh Mailing List
> Subject: [Battlemesh] recommendations for 40Km Link
> 
> Hi guys,
> 
> Here in Quintana (Argentina) we are planning a 40Km link to connect three
> community networks in the region to the nearest Internet Exchange in Cordoba
> City.
> Our longest link so far is 16Km and it works very well (40Mbps) using
> AirGrid M5 27dbi.
> 
> For this occasion we are planning to use Ubiquiti Rocket M5 + 34dbi dishes.
> There is clear LOS between both ends; link calculation seems fine but I'd
> like to ask about your experience with this kind of long shot high
> performance links.
> 
> Any recommendations based on real-world deployments?
> Are you using these Rocket routers for long links?
> 
> 
> Cheers,
> Nico
> _______________________________________________
> Battlemesh mailing list
> Battlemesh at ml.ninux.org
> http://ml.ninux.org/mailman/listinfo/battlemesh
> 
> _______________________________________________
> Battlemesh mailing list
> Battlemesh at ml.ninux.org
> http://ml.ninux.org/mailman/listinfo/battlemesh
> 


More information about the Battlemesh mailing list