From fork-admin@xent.com Wed Oct 2 11:48:04 2002 Return-Path: Delivered-To: yyyy@localhost.example.com Received: from localhost (jalapeno [127.0.0.1]) by jmason.org (Postfix) with ESMTP id 66AE716F1A for ; Wed, 2 Oct 2002 11:47:37 +0100 (IST) Received: from jalapeno [127.0.0.1] by localhost with IMAP (fetchmail-5.9.0) for jm@localhost (single-drop); Wed, 02 Oct 2002 11:47:37 +0100 (IST) Received: from xent.com ([64.161.22.236]) by dogma.slashnull.org (8.11.6/8.11.6) with ESMTP id g923MHK23416 for ; Wed, 2 Oct 2002 04:22:18 +0100 Received: from lair.xent.com (localhost [127.0.0.1]) by xent.com (Postfix) with ESMTP id E59702940F3; Tue, 1 Oct 2002 20:22:02 -0700 (PDT) Delivered-To: fork@example.com Received: from axiom.braindust.com (axiom.braindust.com [64.69.71.79]) by xent.com (Postfix) with ESMTP id F364529409C for ; Tue, 1 Oct 2002 20:21:16 -0700 (PDT) X-Envelope-To: fork@example.com Received: from ianbell.com (194125.aebc.com [209.53.194.125]) (authenticated (0 bits)) by axiom.braindust.com (8.12.5/8.11.6) with ESMTP id g923LJGT006774; Tue, 1 Oct 2002 20:21:20 -0700 Subject: Re: Wifi query Content-Type: text/plain; charset=US-ASCII; format=flowed MIME-Version: 1.0 (Apple Message framework v546) Cc: Damien Morton , , To: Eugen Leitl From: Ian Andrew Bell In-Reply-To: Message-Id: <32BAD95E-D5B6-11D6-AD37-0030657C53EA@ianbell.com> Content-Transfer-Encoding: 7bit X-Mailer: Apple Mail (2.546) Sender: fork-admin@xent.com Errors-To: fork-admin@xent.com X-Beenthere: fork@example.com X-Mailman-Version: 2.0.11 Precedence: bulk List-Help: List-Post: List-Subscribe: , List-Id: Friends of Rohit Khare List-Unsubscribe: , List-Archive: Date: Tue, 1 Oct 2002 20:22:36 -0700 X-Spam-Status: No, hits=-6.1 required=5.0 tests=EMAIL_ATTRIBUTION,IN_REP_TO,KNOWN_MAILING_LIST, QUOTED_EMAIL_TEXT,REPLY_WITH_QUOTES,T_QUOTE_TWICE_1, USER_AGENT_APPLEMAIL version=2.50-cvs X-Spam-Level: I think what you're looking at with the dual antenna mounts is a diversity antenna. It won't work too well with one hooked up to the pringles can and the other hooked up to a regular rubber duck. -Ian. On Tuesday, October 1, 2002, at 01:04 PM, Eugen Leitl wrote: > > 1) reinforced concrete shields like the dickens; wood lots less so > 2) line of sight is best (o'really?) > 3) if you want to boost range, use directional aerials, not omnis > > Direct line of sight (no trees, no nothing) can give you ~10 km with > well > aligned directional aerials (and, say, no sleet, no locusts, nor rain > of > blood). If you want to fan out afterwards, use a bridge of a > directional > coupling to an omni. 802.11a should shield within building lots more > than > 802.11b, ditto line of sight with lots of precipitation inbetween. > > On Tue, 1 Oct 2002, Damien Morton wrote: > >> I just bought a LinkSys BEFW1154v2 Access Point Router for $150 >> (http://www.linksys.com/products/product.asp?grid=22&prid=415). Im >> doing >> some dev work on a Symbol PocketPC device with built in 802.11b. >> >> In this 600 sq ft pre-war New York apartment it goes through 2 or 3 >> walls, into the hallway and halfway down the first flight of stairs >> before it loses contact with the base station. That's less than 50 ft. >> Inside the apartment, it works just fine. >> >> I just did some further testing - through 2 brick walls the range is >> about 25 feet. The signal also goes through the roof pretty much >> unimpeded. >> >> That said, the Symbol device doesn't have an antenna to speak of, and >> I >> havent done any tweaking to try to extend the range. >> >> The Linksys unit has two antenna mounts - you could leave one as an >> omni >> antenna while hooking up a directional antenna to the other. >> >> You might find that you have to use several access points and/or >> repeaters to get the coverage you want.