Sounds like a case for using 3.65 for your BH links. Good engineering around channel assignment and width and polarity would give you a lot of combinations.
-----Original Message----- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Eric Rogers Sent: Saturday, October 31, 2009 12:19 PM To: WISPA General List Subject: Re: [WISPA] Backhaul Questions Ok, so maybe 40 miles is out, seeing is how my links are only 12. I was looking at 5.4 solutions because my 3 mile hops have lots of 5.8 and I am running out of spectrum. Without frequency reuse via GPS or HSS, I have to move to another frequency. 5.4 seemed like it might be a viable option for the short hops, and use 5.8 for the long hops, or even 2.4 with dishes. So MT guys, with a 411 AH, and R5H, you can see speeds up to 30M with low jitter? Eric -----Original Message----- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Jerry Richardson Sent: Saturday, October 31, 2009 2:53 PM To: WISPA General List Subject: Re: [WISPA] Backhaul Questions 40 miles @ 5.4? How is that possible with a 30dB EIRP max limit? Sure you could use a 36dB dish but I can't see how you can turn the power down enough to stay in compliance. Jerry -----Original Message----- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Mike Hammett Sent: Saturday, October 31, 2009 11:45 AM To: WISPA General List Subject: Re: [WISPA] Backhaul Questions Well, depending on what the radio was certified with, you could theoretically go 40 miles in 5.4 GHz. I'm not sure I'd put those antennas on a Rohn 25, though. :-p MT 20 MHz can go 35 megs or so, depending on board HP and RF conditions. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com -------------------------------------------------- From: "Eric Rogers" <ecrog...@precisionds.com> Sent: Saturday, October 31, 2009 8:30 AM To: "WISPA General List" <wireless@wispa.org> Subject: [WISPA] Backhaul Questions > Ok guys...Looking for both Mikrotik experience and others. We currently > have a Mikrotik backhaul between each of our towers using NStreme and we > have been extremely happy with the performance. We recently upgraded a > tower because we were hitting 15M or so during peak times and was afraid > it couldn't handle much more. We upgraded that backhaul to a Motorola > PTP for future capacity. > > > > The questions: > > > > MT Gurus: > > Each backhaul ranges in distance, each ranges from 3 miles (3 backhauls) > and the rest are about 12 miles (5 backhauls). Since we have been using > Mikrotik, I have reliably seen up to 10 Meg, and I am afraid 15 Meg is > pushing the envelope on a 20 MHz channel. > > > > How much capacity can I reliably push on a 20 MHz channel using NStreme? > > > > Other Gurus: > > I understand the following are loaded questions, but budget is around > $1000-3000 range and the capacity needs to be around the 60Meg mark (30 > each way or without a defined 1:1 guarantee, capability to flex and be > able to push 30M each way). > > > > If I start upgrading to larger backhauls on busy links, what type of > equipment should I look at? > > What can support VoIP? > > Anything that GPS times for frequency reuse? > > Anything work in the 5.4GHz range at a 12 mile distance? > > > > Eric Rogers > > Precision Data Solutions, LLC > > (317) 831-3000 x200 > > > > > > ------------------------------------------------------------------------ -------- > WISPA Wants You! 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