>Not sure what difference this makes, uses the same amount of frequency >and both polls are in the same antenna.
You probability of finding clean spectrum on both polarities drops and your collocation options using cross polarity and channel separation drops too >Why? There is no difference in colocation with Airmax vs. non-airmax, do >you think each chain needs it's own channel or something? They don't. I do know they don't need diff channels, but as stated above, you are very limited on channel selections, and finding the right channel on sector A, means that you limit yourself on sector B, C and D. (thinking you are using 4 sectors per site) Then extrapolate that to 4 to 6 adjacent tower sites and youll be dancing the channel change tune for a while. What happens inf 6 months down the road a Tsunami PTP Link kills 2 of your channels on 1 Tower .... Gino A. Villarini g...@aeronetpr.com Aeronet Wireless Broadband Corp. 787.273.4143 -----Original Message----- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Michael Baird Sent: Thursday, December 31, 2009 1:23 PM To: WISPA General List Subject: Re: [WISPA] Wimax gear Gino Villarini wrote: > You need to take in consideration that the Ubnt AirMax true data > thoughtput is about 70 Mbps in highest modulation and under very low > noise scenario > Ok, well that's probably a good estimate w/20 mhz channel width. > Now take on consideration that it uses dual pol to achieve this so you > limit your colocation options > Not sure what difference this makes, uses the same amount of frequency and both polls are in the same antenna. > Taking that in account, expect 30 to 50 Mbps In a true field > deployment under average noise conditions > Ok, what is wrong with that, sounds great. > And you can only colocate 3 or 4 aps per site, then try to growth your > footprint > Why? There is no difference in colocation with Airmax vs. non-airmax, do you think each chain needs it's own channel or something? They don't. > Compare that to the Canopy 430 line with 45 Mbps per ap with gps sync > and A very broad channel reuse facility > > Sent from my Motorola Startac... > > > On Dec 31, 2009, at 11:20 AM, "Randy Cosby" <dco...@infowest.com> wrote: > > >> Let me throw a couple "devil's advocate" arguments into the mix. >> >> The claim was made that the advantage of Motorola is that you can get >> 100 subs per AP, while a Mikrotik or UBNT solution might get 30-40. >> Based on these assumptions, could the argument not be made that a year >> from now, a 100-subscriber Motorola AP with 14 megabit total capacity >> will be much more over-utilized than a Mikrotik 14meg solution with >> only >> 30-40 subscribers? I'm seeing this already on older Trango AP's with >> 70-80 subscribers. 10meg at 80 subscribers is just too much >> oversubscription with today's usage patterns. >> >> Then you can also look at the fact that the mikrotik can do the 14 meg >> in 10mhz bands, adding more efficiency (yes, gps sync helps even >> more, I >> know!). Then you look at a UBNT offering with, let's say 50 megabit >> in >> 20mhz with just 40 subscribers. You may get more life and get further >> along the growth curve with UBNT. Will it really scale to even 40? >> Dunno.. Sure would like to hear of real world experience, but that >> will >> obviously take time. >> >> Randy >> >> On 12/31/2009 7:48 AM, Rubens Kuhl wrote: >> >>> Ubiquiti's move into the large scale market, whether it will work or >>> not, is just happening now with AirMax. It slows the overall >>> performance to much less than 150+ Mbps, but it might get to the >>> 100/user per-AP scale. 3 or 6 months from now we will know of either >>> large deployments or #ubntfail stories. >>> >>> >>> Rubens >>> >>> >>> ---------- Forwarded message ---------- >>> From: Charles Wu<c...@cticonnect.com> >>> Date: Thu, Dec 31, 2009 at 2:33 AM >>> Subject: Re: [WISPA] Wimax gear >>> To: WISPA General List<wireless@wispa.org> >>> >>> >>> >>> Let's go back to the original thread -- we were talking about how >>> Ubiquiti was "changing the game" with their new $75 AP that does 150 >>> Mb or something (as compared to the Alvarion/Motorolas/WiMAX guys of >>> the world who still don't "get it" with their $3/5/10k APs) -- up >>> until now, it's been my experience that this is an "apples to >>> oranges" >>> debate (heck, couldn't I make the same argument that belkin or dlink >>> has had a super-N mimo AP for $69 at Best Buy for some time now?) >>> >>> That being said, if someone has built such a system, please pipe up >>> and share your experiences -- I'm always interested in learning how >>> to >>> do things better/faster/cheaper... >>> >>> >>> --- >>> --- >>> --- >>> --- >>> -------------------------------------------------------------------- >>> WISPA Wants You! Join today! >>> http://signup.wispa.org/ >>> --- >>> --- >>> --- >>> --- >>> -------------------------------------------------------------------- >>> >>> WISPA Wireless List: wireless@wispa.org >>> >>> Subscribe/Unsubscribe: >>> http://lists.wispa.org/mailman/listinfo/wireless >>> >>> Archives: http://lists.wispa.org/pipermail/wireless/ >>> >>> >> -- >> Randy Cosby >> Vice President >> InfoWest, Inc >> >> 435-674-0165 x 2010 >> >> http://www.infowest.com/ >> >> "Letting off steam always produces more heat than light." - Neal A. >> Maxwell >> >> >> >> --- >> --- >> --- >> --- >> -------------------------------------------------------------------- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> --- >> --- >> --- >> --- >> -------------------------------------------------------------------- >> >> WISPA Wireless List: wireless@wispa.org >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> > > > ------------------------------------------------------------------------ -------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > ------------------------------------------------------------------------ -------- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > ------------------------------------------------------------------------ -------- WISPA Wants You! Join today! http://signup.wispa.org/ ------------------------------------------------------------------------ -------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
