On 2/12/2014 6:04 PM, Matt Hoppes wrote:
What are you guys talking about? A 30dB dish with a 0dB radio on it
will easily go 4-5 miles. Or put a 34dB dish on with a -4dB radio if
you want more gain.
Yes, though urban clutter gets in our way. With 5 GHz WLANs becoming
more common, the noise level is higher than it used to be, though not as
bad as on 5.8 where the cable company has decided to hang APs on their
wires. :-(
FWIW I'm looking at the SNMP for one urban PTP400 link, presumably well
situated, that is getting a 64QAM 7/8 signal at a distance of 1.4 miles
(per the radios), with the TX power set to +4 dBm. The PTPs were all
upgraded to DFS. Longer paths tend to converge at lower speeds (QPSK).
But path by path conditions vary.
Sent from my iPad
On Feb 12, 2014, at 17:56, Fred Goldstein <[email protected]
<mailto:[email protected]>> wrote:
On 2/12/2014 5:23 PM, Chuck Hogg wrote:
Yea, but the power levels of some are not likely usable in an
outdoor WISP environment.
A good explanation is at Wikipedia strange enough...
http://en.wikipedia.org/wiki/U-NII
People running equipment in frequencies at a power level higher than
intended is the issue. Also, the 5470-5725 band requires DFS.
Actually, so does 5.25-5.35, as of 2004 or so. It didn't originally,
but when they added the 5.47-5.725 band, which needs DFS, they added
the requirement to the original U-NII-2A band. So
15.407(h)(2) Radar Detection Function of Dynamic Frequency Selection (DFS).
U-NII devices operating in the 5.25-5.35 GHz and5
<http://www.hallikainen.org/FCC/FccRules/2013/5/47-5/section.pdf>.47-5
<http://sujan.hallikainen.org/FCC/FccRules/2013/5/47-5/index.php>.725 GHz bands
shall employ a DFS radar detection mechanism to detect the presence of
radar systems and to avoid co-channel operation with radar systems.
The power level down there is adequate for some applications, like
half-mile links. Lots of old Motorola PTP-400s are legally pumping
+5 to +9 dBm into panels... one urban path is working over 2 miles,
though we're replacing it.
On Tue, Feb 11, 2014 at 6:18 PM, Art Stephens <[email protected]
<mailto:[email protected]>> wrote:
5265-5320
5500-5580
5660-5700
5735-5840
Are these not USA channels?
If am wrong let me know and I will change them.
On Sun, Feb 9, 2014 at 10:04 AM, CBB - Jay Fuller
<[email protected] <mailto:[email protected]>>
wrote:
Forrest...what is your offlist email ?
Sent from my Verizon Wireless 4G LTE Smartphone
----- Reply message -----
From: "Forrest Christian (List Account)"
<[email protected] <mailto:[email protected]>>
To: "WISPA General List" <[email protected]
<mailto:[email protected]>>
Subject: [WISPA] Are we being muscled out of the 5265 - 5700
frequencies?
Date: Sun, Feb 9, 2014 11:53 AM
I'm going to agree with others...
Running outside legal limits doesn't look good to the FCC,
and it sounds like you are definitely running outside the
limits since you are whining about the ability to run your
radios in a mode which seems to have no use than to exceed
the limits.
I will also add that if you're running all your radios
hotter than they should be that your nose floor problem is
most likely self inflicted. My experience over the years
is that radios are designed to run at a specific tx power
and if you're exceeding it you get a lot of out of channel
bleed over. Even if the radios don't do this you are
introducing far more rf than is likely needed causing an
overall rising of the noise floor.
Please don't interpret everyone's ire incorrectly. We've
just all either dealt with an operator like you are now or
have been an operator like you are now. And right now we're
trying to gain credibility with the FCC which is hard to do
when some operators are flagrantly breaking the rules.
Which makes us a bit grumpy.
I'm sure some of your neighbors out there would love to help
you better understand what you are doing to yourself and
help you improve your operations which will in turn improve
your quality of service. Heck, I'd drive over there for a
weekend if my schedule wasn't so packed.
In any case please ask for help in appropriate spots and let
us help you reap the rewards of a correctly and legally
operating network.
On Feb 8, 2014 4:49 PM, "Art Stephens" <[email protected]
<mailto:[email protected]>> wrote:
Recent events make me wonder if the FCC is trying to
muscle wisps out of these frequencies.
Since we are primarily Ubiquiti equipment I can only
speak from that platform.
First the latest firmware update removes compliance test
which for about 40% of our equipment deployed would
render them unusable since 5735 - 5840 runs at - 50dBm
or higher noise levels in our area,
Second is new product released only supports 5735 - 5840.
Seems like DFS is such a pain that manufacturers do not
want to mess with it.
Case in point the new NanoBeam M series only support
5725-5850 for USA.
Worldwide version which we are not allowed to buy or
deploy supports 5170-5875.
Seems the only alternative is to go with licensed P2MP
which makes more money for the FCC and drives the cost
of wireless internet up for both wisps and consumers.
--
Arthur Stephens
Senior Networking Technician
Ptera Inc.
PO Box 135
24001 E Mission Suite 50
Liberty Lake, WA 99019
509-927-7837 <tel:509-927-7837>
ptera.com <http://ptera.com>
facebook.com/PteraInc <http://facebook.com/PteraInc> |
twitter.com/Ptera <http://twitter.com/Ptera>
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Interisle Consulting Group
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