400mw into a rubber duck (usually almost no gain) is probably fine. There are plenty of radios that are certified at 400 mw. Unless the rubber duck is 10 dB, I think you are fine.
One that comes to mind is the Tropos 5210 mesh node. It even has 2 7.4 dBi antennas on it. It's ERP is supposedly 4 watts - which is way too much, still for a mesh with 30 nodes per sq mile, and has to be turned down anyway. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Matt Larsen - Lists Sent: Wednesday, February 21, 2007 4:06 PM To: WISPA General List Subject: Re: [WISPA] multi-radio Wi-Fi base stations Hmmmmm...... My understanding is that 400mw radios are generally not FCC compliant. If that is the case, then there are a lot of telcos that have been selling non-compliant equipment in the form of those DSL modems that they sell to their customers. Just a thought. Matt Larsen vistabeam.com John J. Thomas wrote: > The Telcos all over are deploying 400 mW units-anything that says 2WIRE is 400 mW. > > John > > >> -----Original Message----- >> From: Lonnie Nunweiler [mailto:[EMAIL PROTECTED] >> Sent: Thursday, February 15, 2007 09:12 PM >> To: 'WISPA General List' >> Subject: Re: [WISPA] multi-radio Wi-Fi base stations >> >> Precisely why X2 cloaking is so important. It doubles the number of >> channels and X4 gives 11 of them back to us. X4 gives about 7 mbps >> with non compressible data and over 12 mbps with compressible data. >> Better than a standard B model with perfect conditions. >> >> The other thing to keep in mind is that all of those channel 6 units >> attached to ADSL lines are typically unused or lightly used. They >> connect with an ADSL line and thus cannot even begin to consume the >> total air time. >> >> The Telco here is distributing units with 400 mW radaios whether the >> client even wants wireless in their home. It does not even phase a >> cloaked connection so we are OK with it. >> >> Lonnie >> >> On 2/15/07, Marlon K. Schafer <[EMAIL PROTECTED]> wrote: >> >>> There USED to be three non overlapping channels. Now channel 6 >>> overlaps with every third house in many markets :-). >>> Marlon >>> >>> ----- Original Message ----- >>> From: "Lonnie Nunweiler" <[EMAIL PROTECTED]> >>> To: "WISPA General List" <wireless@wispa.org> >>> Sent: Thursday, February 15, 2007 10:10 AM >>> Subject: Re: [WISPA] multi-radio Wi-Fi base stations >>> >>> >>> >>>> Standard Wifi has 3 channels that do not overlap. X4 cloaking has >>>> 6 channels that do not overlap and X4 cloaking has 11 channels that >>>> do not overlap. >>>> >>>> We use 4 WLM-54G radios in a WAR4 and have seen no great issues >>>> unless two active radios are on the same channel. I am not sure >>>> about 6 but I know for sure that 4 works fine. Incidentally the >>>> SR9 has almost NO leakage. Even with the cards side by side they >>>> will not link up. In order to get anything from them you need a pigtail and an antenna. >>>> >>>> Lonnie >>>> >>>> On 2/15/07, Marlon K. Schafer <[EMAIL PROTECTED]> wrote: >>>> >>>>> I'd recommend against that idea Matt. ALL devices leak some >>>>> energy. And the amount of interference you'll create for yourself >>>>> at inches vs. feet is amazing. If you can keep things 3 feet >>>>> apart there is much less energy, small small fractions in fact. >>>>> >>>>> Alvarion with their FHSS gear can get away with such things >>>>> because they can always stay enough hopping channels away from >>>>> near by radios. FHSS has >>>>> 72 >>>>> (or is it only 70?) channels to choose from. WiFi has basically 2 >>>>> these days. >>>>> >>>>> Where this one gets hard to explain is that people build such >>>>> critters, test them in the lap and then say that they work. Life >>>>> will change dramatically however, once installed into a working >>>>> system AND with the addition of real customers with real traffic. >>>>> >>>>> laters, >>>>> marlon >>>>> >>>>> ----- Original Message ----- >>>>> From: "John Scrivner" <[EMAIL PROTECTED]> >>>>> To: "WISPA General List" <wireless@wispa.org> >>>>> Sent: Wednesday, February 14, 2007 11:24 AM >>>>> Subject: Re: [WISPA] multi-radio Wi-Fi base stations >>>>> >>>>> >>>>> >>>>>> I thought you were already working with Deliberant on just such >>>>>> an animal. >>>>>> Where are you guys with that? I know they have a dual radio unit >>>>>> capable of >>>>>> 5 GHz and 2.4 GHz in the same box. >>>>>> Scriv >>>>>> >>>>>> >>>>>> Matt Liotta wrote: >>>>>> >>>>>> >>>>>>> We don't do much Wi-Fi, so I figured I would ask the list. If I >>>>>>> wanted to deploy a number of Wi-Fi radios at the same location >>>>>>> what kind of setups are available? I am looking for something >>>>>>> where I can deploy one physical box that has multiple radios as >>>>>>> opposed to a single box per radio. >>>>>>> Ideally, it would be something modular where I can have a >>>>>>> variable number of radio interfaces by simply adding cards. >>>>>>> >>>>>>> Does anything like that exist? >>>>>>> >>>>>>> -Matt >>>>>>> >>>>>> -- >>>>>> WISPA Wireless List: wireless@wispa.org >>>>>> >>>>>> Subscribe/Unsubscribe: >>>>>> http://lists.wispa.org/mailman/listinfo/wireless >>>>>> >>>>>> Archives: http://lists.wispa.org/pipermail/wireless/ >>>>>> >>>>> -- >>>>> WISPA Wireless List: wireless@wispa.org >>>>> >>>>> Subscribe/Unsubscribe: >>>>> http://lists.wispa.org/mailman/listinfo/wireless >>>>> >>>>> Archives: http://lists.wispa.org/pipermail/wireless/ >>>>> >>>>> >>>> -- >>>> Lonnie Nunweiler >>>> Valemount Networks Corporation >>>> http://www.star-os.com/ >>>> -- >>>> WISPA Wireless List: wireless@wispa.org >>>> >>>> Subscribe/Unsubscribe: >>>> http://lists.wispa.org/mailman/listinfo/wireless >>>> >>>> Archives: http://lists.wispa.org/pipermail/wireless/ >>>> >>> -- >>> WISPA Wireless List: wireless@wispa.org >>> >>> Subscribe/Unsubscribe: >>> http://lists.wispa.org/mailman/listinfo/wireless >>> >>> Archives: http://lists.wispa.org/pipermail/wireless/ >>> >>> >> -- >> Lonnie Nunweiler >> Valemount Networks Corporation >> http://www.star-os.com/ >> -- >> WISPA Wireless List: wireless@wispa.org >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> >> > > > -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
