1410 Bridges link fail

[rguzman.plannet]

Hi,

I have a point to point link of 9.27 km using 1410 bridges and AIR-ANT58G28SDA-N antennas as per the documentation that would be an easy to deploy link and it should work at 54 Mbps, eventhough it drops the link, it's so slow and the power measurments indicate -70 dbm (aprox) right under the antenna which is at 9 m height.

This is not the first time I have troubles with 1410 bridges, the other two times I had to change them for 1310 bridges. I wonder if it has to do with some configuration tunning like, external antena gain, link distance or anything else? By the wat this is ocurring in México don't know if that might be worth of taking into consideration in order to deploy a 1410 link.

Please let me know if you need to know any other information to figure out the scenario.

Thanks in advance!

Roberto.

[Stephen Rodriguez]

My google-fu finds that Mexico should support you using 5.725 - 5.825, doc is 2003 though.

That's a pretty beefy antennae, and it's a dish.  How did you align the two antennae?

you may also want to look at the range calculator, which is below.

http://www.cisco.com/en/US/prod/collateral/wireless/ps5678/ps458/prod_technical_reference09186a00800a912a.xls

Cheers,

Steve

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[Stephen Rodriguez]

Take a look a the specs of that antennae. IT's a parabolic dish with a narrow beam

http://www.cisco.com/en/US/prod/collateral/wireless/ps7183/ps469/product_data_sheet09186a008022b11b.html

4.75°H, 4.75°V is the beam width.  if you are standing 9m below the antannae, -70 is pretty impressive, since you're getting bleed signal. 

What does the signal look like up by the antennae? What errors are you seeing in the logs on the bridges?  Are there any trees that could be blown into the way?

Cheers,

Steve

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[rguzman.plannet]

Hi,

Thanks I already have that calculator. The antennas instalation, and alignment were hired from a third party that is specialist on those tasks.

I don't think it has to do with distance, let's say it may be matter of alignment, eventhough if you are standing up right under the antenna you should read at least -44 dbm aprox and we are getting -72 aprox. I wonder if there is any physical considerations that may be affecting the power that the antennas are transmitting at.

Thanks!