FYI, Siklu is half-duplex unlike other radios in the space and has shorter ranges than Bridgewave.
On Fri, Apr 5, 2013 at 5:47 PM, Tom DeReggi <wirelessn...@rapiddsl.net>wrote: > ** > Thanks Sam :-) > > As for 80Ghz..... yes, 80g gets better range than 60ghz because its better > characteristics against oxygen absorbtion, maybe 30% further.. I had worked > with 80 and 60gb quite a bit, the problem was it was just to darn > expensive, for last mile links. 80 and 60 gig can actually go much much > further, the issue is rain fade, where a radio that could go 7miles in the > dry would be limited to 1 mile in the rain. To combat the rain, high power > had to be used. So if the radios are put to close togeather, without the > rain, then they overload the recievers of the other end. So... vendors > usually make different power models hard set to a specific power, tuned to > a minimum and maximum distance. As well few models did adaptive modulation, > because they operated more like dumb models. The embedded CPU boards for > like management generally were out of band from the data path, so hard to > improve with software. > The big challenge with these type systems is that the freq is highly > reflective and they are vulnerable to multipath. The links are super fast > in ideal situation, but the slightest change in environment or alignment > can cause the links to get errors and packetloss, and then TCP throughput > goes to crap. It can be hard to tell when a link is performing like crap, > when the ISP cant remotely run tests through the link, or without smart > tools in the radios to report on such quality. > Because of these challenges, and huge prices of 80Ghz, ISP wer better off > chosing licensed Part-101 Microwave. > > But at $3500 this is a total game changer. The 1ft dishes should be good > for a mile. And they have adaptive modulation, running at QPSK or QAM16, so > one can push the speed on dry days. and survive the eeatehr better on rain > days. Millimeter wave benefits from adaptive modulation more than other > lower bands, because the amount of rain fade is so much higher and > therefore such a higher need to have adaptive modulation on the radio to > cure it. > > If you just look at a single link, Id argue 24Ghz is often a better > choice, now that 24Ghz vendors have some exciting options for us. (You know > who you are SAF, Ubiquiti, Trango, etc). But for an ISP, it really boils > down to colocating. How many radios can you get installed at a tower? 80Ghz > is narrower beam than 24G, and can colocate at a closer angle to an > adjacent radio. But at minimum, its a second freq to use, to double links. > > The falisy with 60hz is that its interference free. Its not in urban > America because the reflections from other radios can cause interference > even though it has a narrow pencil beam. As well interference can actually > occur from 7 miles away in dry even though range is thought to be short > because it is in rain fade conditions. > > The bottom line for Urban Wireless is... We need faster last mile speeds > to serve commercial tenant buildings. UNlicensed links that we used to use > to serve entire buildings or even entire groups of buildings now barely > have enough capacity for a single subscriber. Thank Comcast for selling > 50mb circuits by default for pennies. Wireless backhaul starts to convert > to local fiber aggregation direct to towers. And high speed wireless starts > to migrate to last mile single building. But for ISPs to afford > installing their sales, the last mile radios need to be cheap. 10, 20, 30k > just doesnt cut it. > > But sub $3500, now that gets exciting. A single T1 replacement customer > can fund the ISP's upgrade ROI in a year. I also believe this to be a > strong case for convincing banks, lending to WISPs is a low risk loan. > > > what Im interested in most with the new Siklu radios is knowing whether > they have embedded tools to be able to remotely tell the quality of the > link. To make it easy for ISPs to support remotely. > Many original generation products did not. > > > > Tom DeReggi > RapidDSL & Wireless, Inc > IntAirNet- Fixed Wireless Broadband > > > > ----- Original Message ----- > *From:* Sam Tetherow <tethe...@shwisp.net> > *To:* WISPA General List <wireless@wispa.org> > *Sent:* Friday, April 05, 2013 3:27 PM > *Subject:* [Spam] Re: [WISPA] Siklu Eband -finally affordable > > Wow! > > (partially because of the price drop, but mostly because I haven't seen > Tom post in forever, welcome back) > > I haven't really studied up on 80GHz stuff, but it is my understanding > that you don't have to worry about rain fade, and you have 10GHz of > spectrum to use which should ease co-location issues. > > On 04/04/2013 09:06 PM, Tom DeReggi wrote: > > Its been ages since I've posted, but....this advertisement surely caught > my eye. > > Siklu Eband radios (licenced light) for sub $3500 per link. FINALLY !!! > We can afford to start using this 70G spectrum. > > Some may say not that exciting, considering 24Ghz products have already > hit that price mark and functionality, and can go 3x the distance. > But, I say its exciting, thats one ambitious price drop from where other > 80Ghz products have been priced at ($30k), historically 2-4x over priced > compared to 60Ghz equivellent product, just because of the uniqueness to > license 80Ghz and slight increase in range. Its nice to see someone finally > do it, after I've been screaming for it for the last 10 years. > > Anyway... anyone use the product yet and have feedback? > > > > Tom DeReggi > RapidDSL & Wireless, Inc > IntAirNet- Fixed Wireless Broadband > > > > ----- Original Message ----- > *From:* ~NGL~ <n...@ngl.net> > *To:* WISPA General List <wireless@wispa.org> > *Sent:* Thursday, April 04, 2013 7:55 PM > *Subject:* [WISPA] Bullet M5HP > > What kind of throughput can I expect with a pair of Bullet M5's PTP with > 24 DBI Grids and pure LOS at 2-5 miles? > NGL > If you can read this Thank A Teacher. > And if it's in English Thank A Soldier! > > ------------------------------ > _______________________________________________ > Wireless mailing list > Wireless@wispa.org > http://lists.wispa.org/mailman/listinfo/wireless > > > > _______________________________________________ > Wireless mailing > listWireless@wispa.orghttp://lists.wispa.org/mailman/listinfo/wireless > > > ------------------------------ > > _______________________________________________ > Wireless mailing list > Wireless@wispa.org > http://lists.wispa.org/mailman/listinfo/wireless > > > _______________________________________________ > Wireless mailing list > Wireless@wispa.org > http://lists.wispa.org/mailman/listinfo/wireless > >
<<inline: ATT00001>>
_______________________________________________ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless
