From owner-freebsd-chat Mon Jan 22 15:12:33 2001 Delivered-To: freebsd-chat@freebsd.org Received: from mta06-svc.ntlworld.com (mta06-svc.ntlworld.com [62.253.162.46]) by hub.freebsd.org (Postfix) with ESMTP id DB73937B6BD for ; Mon, 22 Jan 2001 15:12:14 -0800 (PST) Received: from dmlb.org ([62.253.135.104]) by mta06-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with ESMTP id <20010122230430.MPOG285.mta06-svc.ntlworld.com@dmlb.org>; Mon, 22 Jan 2001 23:04:30 +0000 Received: from dmlb by dmlb.org with local (Exim 3.03 #1) id 14Kq0k-0000ln-00; Mon, 22 Jan 2001 23:04:30 +0000 Content-Length: 2012 Message-ID: X-Mailer: XFMail 1.3 [p0] on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: Date: Mon, 22 Jan 2001 23:04:29 -0000 (GMT) From: Duncan Barclay To: Brad Knowles Subject: Re: Mobile phone coverage (was: VCD (was Re: cvs commit: src/sys Cc: freebsd-chat@FreeBSD.ORG, Michael C.Wu , Greg Lehey Sender: owner-freebsd-chat@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On 22-Jan-01 Brad Knowles wrote: > At 12:35 PM +1030 2001/1/22, Greg Lehey wrote: > >> That's not the issue here. BTW, for the USA you need a three-band >> phone. That is, incidentally, the only kind of phone which will work >> just about anywhere (I'm not sure about Israel and Korea). > > Uhh, I think you need more than that. Let's count: > > AMPS/NAMPS > US TDMA (1900Mhz? 900Mhz?) > US CDMA (1900Mhz? 900Mhz?) > US GSM (1900Mhz) > European GSM (900Mhz/1800Mhz) > > To which you will be able to add W-CDMA, with the advent of the > 3G networks. Of course, this doesn't begin to address the needs for > analog coverage outside the US -- this is just a list of the > different technologies and frequencies of which I am personally > acquainted. I'd love to see this list get expanded. UMTS/3G is 1920-1980 downlink and 2110-2170 uplink. >> The real issue is competition. One large company would be able to get >> better coverage. > > Coverage is extremely expensive to build. It's much cheaper to > buy. And even then, you don't really try to dot the entire country > side with a tower in each and every square mile (maybe every 1/10th > of a square mile in cities), you just don't bother trying to put up > antennas in the less populated areas, and you live with the fact that > 98% coverage is good enough and the rest of the people can just piss > off. You also build pci and micro cellular basestations that live on light/ utility poles. Nokia, Ericsson and Lucent all do these. Nokias are called MetroCite. >>> Love love 3G+W-CDMA. >> >> And where do I get one? R+D labs! Not mine yet though :-( > Damn good question. I wanna know, too. Duncan --- ________________________________________________________________________ Duncan Barclay | God smiles upon the little children, dmlb@dmlb.org | the alcoholics, and the permanently stoned. dmlb@freebsd.org| Steven King To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message