Building-to-Building link. Is this likley to work?

Hi,
Please see the attached drawing that represents what I'm trying to achieve.


There is a builing between the two that Im tryng to connect that blocks line of sight however the distance is short and I have cisco gear(BR340 wireless bridges) with 100mw radios and I can get some good antennas. My question is, is this even worth trying and if so what sort of antennas should I use and how should I position them.

Any comments would be greatly appreciated.

Regards,
Rhys

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It wouldn't be a good signal, it may work for a while but may cause problems.

Can you not mount the aerial on the front of your buildings? I.e. to go around the tall building inbetween instead of over it?

looks like a trial and error might be you best bet. I agree with Noodles, I have found directional antenna unreliable unless you have line of sight. Have you already got the AP's? if so you could try just placing next to an open window on each building first to test and see if you can bridge them. If this did work, a couple of 8dBi omni antenna on the outside of the building may work may work. From the picture it looks like there is a small line of sight down the back of the buildings, is this an option?
You really need to do a site survey with the equipment you plan to use and try different locations, as it is impossible to say for sure that it will work without line of sight.
All the best
Dale

I agree with Dale, if that diagram is even roughly to scale then that clear LoS path along the back might do it for you. If you already have the gear, give it a shot and experiment until you find a method that works well.

Yeah sorry guys, should have drwan it better, there is no way to do anything at the back of the builing. So if I'm goona give it a shot I should try omi driection in the front windows, rather than pointing a directional at a builing on the other side of the road in an attepmt to bounce the signal? As you can tell I don't know too much about RF!

What type of antennas do the Cisco units come with as stock? Give it a try with those, you have nothing to lose and it will help you locate the best site to install or even tell if it will work or not. Maybe then you could replace with a directional antenna to reduce multipath interference and although I've never tried bouncing signal before, I can't see why it wouldn't work for a short distance.

I just have the normal rubber antennas. The only problem is that I'm in Auckland and the site in question is in Wellington, I need to make sure I'm as well prepeared as possible. Has anyone else had experience bouncing signals off other buildings or have I really got the wrong end of the stick on this one?

Thanks heaps the replys.

I understand Terabeam devices offer good non-LOS, my coy just purhased some equipment from them and it works pretty ok. If u havet gotten ur equipments yet, it wont be a bad idea to contact them.

The tall buildings between the low ones you want to connect, how high is it compared to the two? Try facing the antennas skywards tilting at an angle like u want to get a point using any non-LOS equipemnt. Just make sure you use a non-LOS device.

Good hunting!