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Date: Thu, 16 Aug 2001 13:34:28 -0400 From: Leo Bicknell <bicknell@ufp.org> To: Greg Maxwell <gmaxwell@martin.fl.us> Cc: Leo Bicknell <bicknell@ufp.org>, "'nanog@merit.edu'" <nanog@merit.edu> Message-ID: <20010816133428.A99783@ussenterprise.ufp.org> Mail-Followup-To: Leo Bicknell <bicknell@ussenterprise.ufp.org>, Greg Maxwell <gmaxwell@martin.fl.us>, Leo Bicknell <bicknell@ufp.org>, "'nanog@merit.edu'" <nanog@merit.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <Pine.GSO.4.33.0108161315500.21079-100000@da1server.martin.fl.us>; from gmaxwell@martin.fl.us on Thu, Aug 16, 2001 at 01:28:46PM -0400 Errors-To: owner-nanog-outgoing@merit.edu On Thu, Aug 16, 2001 at 01:28:46PM -0400, Greg Maxwell wrote: > I just ran some quick numbers, and a unlicenced 20mile link like that > would be possible, but I wouldn't sell it.: > > 1.75mw -> 36dBi antenna -> freespace -> 36dBi antenna -> reciever + mis > losses, has an EIRP of about 3.9 watts (legal). > > You'd have about 15db of link margin, and that's much too little for a > reliable link IMO. That's why I suggested two 10 mile links. :-) There are a large number of people in the 10-14 mile range with reliable links, and very few people pushing further. That said, some guy in NZ got around 35 miles as I recall using off the shelf parts. It no doubt exceeded FCC regs though, but that's not an issue for him. -- Leo Bicknell - bicknell@ufp.org Systems Engineer - Internetworking Engineer - CCIE 3440 Read TMBG List - tmbg-list-request@tmbg.org, www.tmbg.org
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