In our case, we have a 41 mile shot pushing 50 mbps fdx with a PTP600, using 3 and 4 footers....
For us to go licensed, we would need 6 ghz (rain zone) and would need at least 8 footers on each end... Huge diferrence! Gino A. Villarini [email protected] Aeronet Wireless Broadband Corp. tel 787.273.4143 fax 787.273.4145 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Matt Larsen - Lists Sent: Friday, April 10, 2009 1:22 PM To: WISPA General List Subject: Re: [WISPA] High Throughput Licensed vs. Unlicensed Jeff, I think you have made a fine point. I realized about a year ago that with the cost of licensed links coming down, there wasn't a lot of reason to look at the high-end UL radios anymore. When a StarOS or MT setup will deliver 30-50meg of FD throughput at a very low cost, the next logical step is to go with a 100MB licensed link. I have a couple of my consulting clients that have been dumping their Moto BH links in favor of StarOS because it is cheaper and quite a bit faster, but we have also found a few situations where we need more speed, and going licensed just makes way more sense than spending that much money on a UL link. I do see Travis's point about the longer range shots, however. I've got a 35, 45 and 65 mile shots with StarOS and they work just fine but only put out about 18-25meg at those distances. That's enough for me, but I can see where you would want more capacity and I suppose that within that narrow definition, a PTP600 would be better than a licensed link. Matt Larsen vistabeam.com Travis Johnson wrote: > Jeff, > > First let me say we LOVE our Trango licensed links. However, the one > issue you are not taking into account is distance. I just did a path > calc on a 73 mile 5ghz link we have now using a PTP600 and it looks > really good.... there is no way to do that shot with 11ghz (believe > me, if I could I would). > > So, distance may be a limiting factor when considering licensed vs. > unlicensed. We won't talk about my 32 mile, 18ghz licensed link (using > 2ft dishes) with 99.99% reliability. ;) > > Travis > Microserv > > Jeff Ehman wrote: >> Since it is Friday and I am bored >> >> Here's some interesting points >> >> 11 GHz Licensed Radio >> - 220 Mb (110 FD): -76 dBm >> >> PTP600 >> - 300 Mb (150 FD): -59.1 dBm >> - 200 Mb (100 FD): -68.1 dBm >> >> 12 Mile Shot - Availability for both systems using 2' dishes is >> 99.999% -- but we may need larger dishes for 5 GHz to account for >> interference and noise (while in the licensed band, interference and >> noise doesn't exist) >> >> Assuming no noise for PTP600 >> - 2' (28 dBi) Dishes on both sides - Aggregate Throughput - 200.68 Mb (~100 Mb Full Duplex) >> - 4' (34 dBi) Dishes on both sides - Aggregate Throughput - 287.69 Mb (~140 Mb Full Duplex) >> >> Now, since the PTP600 requires 30 MHz of spectrum and BOTH polarities, it's safe to assume that generally speaking, we should plan for a minimum thermal noise floor of -80 dBm - adding that into the equation, our calculation now shows the following >> - 2' (28 dBi) Dishes on both sides - Aggregate Throughput - 109.03 Mb (~50 Mb Full Duplex) >> - 4' (34 dBi) Dishes on both sides - Aggregate Throughput - 197.61 Mb (~100 Mb Full Duplex) >> >> 11 GHz Licensed Radio (no noise to worry about) >> - 2' (34.3 dBi) Dishes on both sides - Aggregate Throughput - 220 Mb (110 Mb Full Duplex) >> >> *NOTE: Licensed radios transmit and receive on SEPARATE >> frequencies...so round trip latency is ~0.4 milliseconds (~400 >> microseconds) per hop >> >> >> Now, let's look at cost >> PTP600 with 2' Dual Pol antennas and misc stuff: $14k PTP600 with 4' >> Dual Pol antennas and misc stuff: $16k Licensed Radio with 2' Dishes >> (Software Upgradable to 300 Mb Full Duplex) and FCC License: $12k >> >> >> >> -Jeff >> CTI >> "There is a Difference" >> >> >> -----Original Message----- >> From: [email protected] <mailto:[email protected]> >> [mailto:[email protected]] On Behalf Of Gino Villarini >> Sent: Friday, April 10, 2009 11:20 AM >> To: WISPA General List >> Subject: Re: [WISPA] High Throughput Licensed vs. Unlicensed >> >> >> IMHO the PTP600 is the best UL radio in the market... >> >> >> Gino A. Villarini >> [email protected] <mailto:[email protected]> Aeronet Wireless >> Broadband Corp. >> tel 787.273.4143 fax 787.273.4145 >> >> -----Original Message----- >> From: [email protected] <mailto:[email protected]> >> [mailto:[email protected]] On Behalf Of Brad Belton >> Sent: Friday, April 10, 2009 11:08 AM >> To: 'WISPA General List' >> Subject: Re: [WISPA] High Throughput Licensed vs. Unlicensed >> >> >From what I understand the PTP600 is an OFDM "best effort" radio. >> >If >> >>> the RF >>> >> environment is favorable then it will pass data. If not then it >> slows down and/or starts dropping packets. >> >> I believe the PTP600 is also a HDX radio, is it not? Not trying to >> be adversarial...just interested in learning more about any UL radio >> that can produce 150Mbpd FDX as reliable as a licensed radio set. >> >> Anyone have a PTP600 manual they can send me? >> >> >> Brad >> >> >> -----Original Message----- >> From: [email protected] <mailto:[email protected]> >> [mailto:[email protected]] On Behalf Of Gino Villarini >> Sent: Friday, April 10, 2009 9:59 AM >> To: WISPA General List >> Subject: Re: [WISPA] High Throughput Licensed vs. Unlicensed >> >> Just the PTP600 that I think off ... 30 mhz >> >> >> Gino A. Villarini >> [email protected] <mailto:[email protected]> Aeronet Wireless >> Broadband Corp. >> tel 787.273.4143 fax 787.273.4145 >> >> -----Original Message----- >> From: [email protected] <mailto:[email protected]> >> [mailto:[email protected]] On Behalf Of Brad Belton >> Sent: Friday, April 10, 2009 10:54 AM >> To: 'WISPA General List' >> Subject: Re: [WISPA] High Throughput Licensed vs. Unlicensed >> >> Ok, I'll bite. What UL radio set is going to produce 150Mbps FDX and >> at what RF spectrum cost? >> >> >> Brad >> >> >> -----Original Message----- >> From: [email protected] <mailto:[email protected]> >> [mailto:[email protected]] On Behalf Of Jeff Ehman >> Sent: Friday, April 10, 2009 9:02 AM >> To: WISPA General List >> Subject: [WISPA] High Throughput Licensed vs. Unlicensed >> >> All, >> >> This post is for those looking at putting in high throughput >> unlicensed radios. I can talk all day about the advantages of >> licensed (guarantee of 35-40db fade margin for starters) but I want >> to throw out some real world numbers I am seeing. Don't get me >> wrong, there is always a place for unlicensed radios (speed to >> deploy...licensed takes 4-6 weeks to build, and you can move the >> radios without relicensing) but there are other options on the high >> capacity side right now. Check out everything below because the >> pricing for licensed has come down tremendously over the years. Just something to mull over this weekend. >> >> THIS IS ALL IN APPLES TO APPLES. >> >> ~110mbps Licensed Radio >> Radio + 2 foot dished + Coordination = $9,995.00 FCC Fees = $650 per >> side = $1,300.00 >> 2 Power Supplies and 2 POE Adaptors = ~$638.00 TOTAL PRICE ALL IN = >> ~$11,933.00 >> >> ~150mbps Unlicensed Radio >> 150mbps Connectorized Radio Link = ~$11,000 Dual Pol Antennas + Coax >> Jumpers = ~$400.00 TOTAL PRICE ALL IN = $11,400.00 >> >> -Jeff >> CTI >> "There is a Difference" >> >> >> --------------------------------------------------------------------- >> --- >> ---- >> ---- >> WISPA Wants You! 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