I don't care how many QAMs your radio can do, if you don't have the SNR,
you don't get the bandwidth.
We replaced some UBNT 3.65 sectors with the 3.6 450. Obviously the 450
won. Nearly the same signal and noise levels. I don't know what it is
about the UBNT 3.65, but it just sucks.
Yep, the 450 is expensive, but it works.
On 4/19/2015 7:32 AM, Mike Hammett wrote:
That's fine. The less usable spectrum you have, the more you need to
optimize what you have. The more middle of nowhere it doesn't matter
what you do. the more you have neighbors, the more you have to plan
more carefully and use better gear. You know I operate in the Chicago
metro area. You know I have a dozen WISP competitors (last time I
counted), not to mention the same private users that you mention. I
know a busy airspace.
I don't put as much into Jim's findings regarding the ePMP as you.
802.11ac is 33% - 38% more efficient than N. The ePMP still isn't a
great performer in Jim's charts, but it gets a heck of a lot closer.
Now put two of the PtMP platforms tested on the same tower and see who
wins. Two of them back to back and ePMP is still only using 20 MHz,
while the others are using 40 because they can't be using the same
frequency back to back.
It'd be interesting to see how the 450 stacks up. I'm not likely to
deploy 450, but would like to see how it compares.
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
<https://www.facebook.com/ICSIL><https://plus.google.com/+IntelligentComputingSolutionsDeKalb><https://www.linkedin.com/company/intelligent-computing-solutions><https://twitter.com/ICSIL>
------------------------------------------------------------------------
*From: *"Josh Reynolds" <[email protected]>
*To: *[email protected]
*Sent: *Sunday, April 19, 2015 1:49:46 AM
*Subject: *Re: [AFMUG] Very interesting post..
Except those competitors don't sync with you, and it's very often that
our clients don't actually have the strongest signal to our tower, but
somebody else's.
Many of our clients see 15-20 APs, and many more are hidden because
they are 30 or 40MHz wide channels. There are environments much, much
worse than ours.
GPS sync is good *in certain environments, in certain situations*, but
it is not this mythical magic bullet that allows you to be a lazy
operator.
Also, by the results today, the only real viable solution on the
market at this time that does have GPS sync in a PtMP configuration
does piss poor in adjacent channel interference environments, which is
exactly the type of environment I'm in.
Josh Reynolds
CIO, SPITwSPOTS
www.spitwspots.com
On 04/18/2015 08:11 PM, Mike Hammett wrote:
The more competitors, the *MORE* you need sync.
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
<https://www.facebook.com/ICSIL><https://plus.google.com/+IntelligentComputingSolutionsDeKalb><https://www.linkedin.com/company/intelligent-computing-solutions><https://twitter.com/ICSIL>
------------------------------------------------------------------------
*From: *"Josh Reynolds" <[email protected]>
*To: *[email protected], "Mathew Howard" <[email protected]>
*Sent: *Saturday, April 18, 2015 8:51:00 PM
*Subject: *Re: [AFMUG] Very interesting post..
AF absolutely has sync?
As far as AirMaxAC, sure, no sync.. At this time.
In the end though, there are a lot of operators that simply don't
care about sync.
Eventually in many markets it will come to a point when you simply
run out of clean frequency, ie: using one or two or three per
tower won't cut it, due to competitors, cell offload, etc. In that
scenario where GPS sync is virtually useless (because you're
picking the best freq per direction), its pretty obvious that
there are a few radios that would currently excel in that scenario.
There are many places where we are, for instance, where multiple
competitors, city and state links, federal, etc have towers less
than a mile from us. Having the ability to "shrug off" that
adjacent and co channel noise is critical for us.
On April 18, 2015 4:52:38 PM AKDT, Mathew Howard
<[email protected]> wrote:
This test ignores a few kind of important details... the UBNT
and Mikrotik AC radios have no ability to sync, which gives
them a significant disadvantage. also, the Mimosa radios are
(theoretically) capable of higher throughput since they are
the only ones with the ability to use two 80mhz channels...
granted, it's pretty rare that is actually possible in the
real world, but if you had synced Mimosas everywhere, it could
be done. He's also using a $499 ePMP radio, when he should be
using a $200 Force110 PTP.
That said, the conclusion the the AF5x is the best is probably
right :P
On Sat, Apr 18, 2015 at 5:55 PM, Ken Hohhof <[email protected]
<mailto:[email protected]>> wrote:
If your criterion is performance in the presence of a
signal on a different frequency 30 dB stronger than the
desired signal, this analysis is relevant. Also, this
seems to be the scenario airPrism is designed to address.
But how often would this occur? Even if the interference
is from another non-synced transmitter on the same tower,
you’d think directional antennas would knock the
interfering signal down to less than 1000 times the
desired signal.
I guess this could be realistic if you have a point to
point link in the same band as a sector, so that a giant
dish at the other end is pointed right at your sector.
*From:* Josh Reynolds <mailto:[email protected]>
*Sent:* Saturday, April 18, 2015 5:34 PM
*To:* [email protected] <mailto:[email protected]> ; Seth Mattinen
<mailto:[email protected]>
*Subject:* Re: [AFMUG] Very interesting post..
Horseshit, read the article. Did you miss the portion
where Jim said "it's the exact same chip that's in the RM5"?
I would have liked to have seen the RM5 in this test as a
baseline, but ignoring the results simply because it's N
tech in the EPMP is silly. Not only does the throughput
drop, but the LEVEL it degrades at is only "bested" by the
B5C in a few of the tests. N or not, that's a very poor
result.
I would love to see other tests posted on this from other
people, its always nice to have multiple sources to remove
any potential level of bias.
Jim did an excellent job on this and should be commended.
On April 18, 2015 2:26:50 PM AKDT, Seth Mattinen
<[email protected] <mailto:[email protected]>> wrote:
On 4/18/15 2:49 PM, Peter Kranz wrote:
Very interesting shootout comparing AF5X, AC-Lite,
AC PTP, EPMP-1000, B5c and RB922
https://community.ubnt.com/t5/airMAX-Stories/Radio-Shootout-Pt-2-let-s-try-a-whole-bunch-of-them/cns-p/1232309
Dude didn't seem to catch that the ePMP is an N radio and
dismisses it
as worst of the worst. Looks to me like it would probably hold
up
comparably to its AC counterparts if you take that into
consideration.
~Seth
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my brevity.
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Sent from my Android device with K-9 Mail. Please excuse my brevity.
