I think you'd have a lot of trouble trying to co-locate those. We were able 
to get something working several years ago using XR9's (total of three 
radios) but we had to separate them horizontally by 40 feet and use a dish 
on one of the radios to get anything that worked. One of the three was in 
PTP rather than PTMP and we had to put that one in managed mode. And 
recently a third-party showed up in the area with some sort of remote 
well-head monitoring gizmo and messed everything up again. Overall a very 
touchy and annoying installation process.

Tom S.

----- Original Message ----- 
From: "Jay Weekley" <par...@cyberbroadband.net>
To: "WISPA General List" <wireless@wispa.org>
Sent: Thursday, August 22, 2013 9:08 AM
Subject: Re: [WISPA] Latest trend for heavy wooded areas


> I've heard that it's difficult to impossible to get more than one
> Ubiquiti 900 ap on tower regardless of channel separation. Have others
> found this to be true?
>
> Robert wrote:
>> Funny (or not depending upon your point of view ) thing is that the best
>> results for throughput/penetration with 900Mhz was with the original
>> SR9's from UBNT.  Better throughput by 2-3x than XR9 but less
>> interference resistance but being able to run smaller channels with the
>> same throughput made up for that.  All that was from before 900 rollout
>> from the utilities and the 900 band turning into complete junk when the
>> power meters do updates and other heavy usage..  We tried the other UBNT
>> gear with not nearly the same results, but with and without external
>> antennas.
>>
>> On 08/22/2013 07:20 AM, Josh Luthman wrote:
>>> Ubnt 900 apparently has extremely poor nlos for 900 MHz.  I've heard
>>> this a handful of people but haven't tried it myself.
>>>
>>> Josh Luthman
>>> Office: 937-552-2340
>>> Direct: 937-552-2343
>>> 1100 Wayne St
>>> Suite 1337
>>> Troy, OH 45373
>>>
>>>
>>> On Thu, Aug 22, 2013 at 10:03 AM, Mike Hammett 
>>> <wispawirel...@ics-il.net> wrote:
>>>> How is it junk? IIRC, everyone I've asked that claimed a given 900 MHz
>>>> system was junk had a poor RF environment.
>>>>
>>>>
>>>>
>>>> -----
>>>> Mike Hammett
>>>> Intelligent Computing Solutions
>>>> http://www.ics-il.com
>>>>
>>>> ________________________________
>>>> From: "Erik Anderson" <erik.ander...@hocking.net>
>>>> To: "WISPA General List" <wireless@wispa.org>
>>>> Sent: Thursday, August 22, 2013 8:49:55 AM
>>>>
>>>> Subject: Re: [WISPA] Latest trend for heavy wooded areas
>>>>
>>>> 98% of our terrain is heavily wooded. Ubiquiti 900 is junk (but their 
>>>> other
>>>> products perform quite well when they can be used). Cambium 900 is 
>>>> better.
>>>> Out limited experience with whitespace has been good. All of these
>>>> technologies have very low bandwidth.
>>>>
>>>> On 8/22/2013 12:04 AM, Chris Fabien wrote:
>>>>
>>>> What are you guys deploying lately in heavily wooded areas? We've used 
>>>> both
>>>> Cambium pmp320 Wimax and UBNT M900, with mixed results on both. We just 
>>>> put
>>>> up a 130ft tower in a heavily wooded river valley area, leaning towards 
>>>> the
>>>> UBNT solution but hate putting money into something I'm not really 
>>>> satisfied
>>>> with.
>>>>
>>>>
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>>>>
>>>>
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>
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