All the UBNT radios can perform at about the same speed. (assumming they all have the proper link budget for antenna size, and ofcourse understanding 1x1 models are half of 2x2 models). The bigger differenciaters are mechanical, meaning mounting, shileding, cabling, etc.
1) Can the radio mount on strong 2-3/8" mast, or just limited to less than 2" which usually ends up being 1-1/4" mast. 2) Does mounting have a single point of failure? Example comparing smaller Nanobridges (21db) that have only one Ubolt, versus larger Nanobrodges (25db)that have Dual Ubolt. 3) Is cat5 cabling easy and quick to remove or visible, either for verifying health of connection, on roof maintenance, or removal/swap? 4) Is CAT5 securable? For example, the Bullets itself cant really be mounted vertically, without risking crushing case, other than maybe with duct tape :-) If mounting to an Omni, the omni is what gets mounted, and the mount type must be offset enough for bullet clears the mast. Most often Bullets are just mounted direct to the back of panel direct to N connector. The side effect of that is the cat5 connection is extending back out into the open air. Where do you secure the CAT5? A mast may not exist behind the bullet. So the CAT5 just flapps around in the wind, which can weaken CAT5 connections over time. Obviously the CAT5 will get looped around and fastened to the mast eventually, but there is more cable length left unsecured close to teh bellet's connection. Compare that to a rocket, Nanobridge, or Nanostation, where the CAt5 cable shoots stright down directly to the direction of the Mast. This allows cable to be secured with the least amount of strain on the cable from high winds. With bullet if Condensation allows moisure in, where does it drip, based onthe orientation of the Bullet? Compare that to a rocket. We use bullets alot, and I'm not saying they are not adequate, I'm just saying, for critiical links, these little differences make big differences in uptime reliabilty over time. One maintenance trip to an easilly accessible radio is probably more than the cost to upgrade to the higher grade solution. If you wave setup equipment fees, but bill by the hour for house visits thereafter, use the Bullet :-) We used to use Bullet alot because it was single pol. But now that the command exists to disable a pol on the new rockets, we are starting to use Rockets instead. Everything has a trade off. We use the Nanobridge25 dishs most commonly. We hate the CAT5 access for those radios and that it doesn;t fit 2-3/8" mast, but its a trade off we live with to get low price, tight beamwidth w/ good front to back isolation, enough gain for most anything (we can always turn tx power ain down for short links) shooting for high modulation everywhere, small cosmetic look, and double Ubolt for more secured mounting. The comparison I like to make is the Nanobridge25 to the Rocket in an ARQ inclosure. Its the difference between $80 and $225. When it really matters, I'll usually use the ARQ solution, its a bit better. But for most subscriber situations, the Nanobridge is plenty good enough. Almost always, because the Nanobridge only support 2" mast, I have to additionally buy a pole to pole mount, to mount a 1-1/2" pole to the pre-existing 2-3/8" mast to be able to mount the Nano, which is a pain in the neck and more uglier. But even then, the pole to pole mount only costs me $30, and I'm still half the cost of the ARQ solution. When it really matters, and I have a bit more distance and flexibilty cosmetically wise, I'll just use the UBNT 29 dish and Rocket, which is only a $260 solution. The power bridge is really pretty. And its worth paying the higher $300 price tag, if you want it to look pretty, and can survive with only a 2" mount bracket, or dont mind buying an additional pole to pole mount to make it less pretty.. It also allows you to just take it out of the box and install, without the quick fabrication necessary with the ARC/Rocket solution. Allthough I still prefer the ARQ/Rocket solution over powerbridge. Tom DeReggi RapidDSL & Wireless, Inc IntAirNet- Fixed Wireless Broadband ----- Original Message ----- From: "Akinlolu C. Ajayi-Obe" <aajayi...@as-technologies.com> To: "WISPA General List" <wireless@wispa.org> Sent: Monday, March 05, 2012 1:31 AM Subject: Re: [WISPA] UBNT What's the difference in performance between a powerbridge and and airbridge on a 2mile 20MB link. Akinlolu C. Ajayi-Obe AS Technologies Ltd Tel. 234(0)8023258027 -- This e-mail and any attachments are intended solely for the use of the intended recipient(s) and may contain legally privileged, proprietary and/or confidential information. Any use, disclosure, dissemination, distribution or copying of this e-mail and any attachments for any purposes that have not been specifically authorized by the sender is strictly prohibited. If you are not the intended recipient, please immediately notify the sender by reply e-mail and permanently delete all copies and attachments. 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