Date: Tue, 23 Jan 2001 01:25:31 +0100 From: Brad Knowles <brad.knowles@skynet.be> To: Greg Lehey <grog@lemis.com> Cc: "Michael C . Wu" <keichii@peorth.iteration.net>, Kris Kennaway <kris@FreeBSD.ORG>, freebsd-chat@FreeBSD.ORG Subject: Re: GSM vs. CDMA (was: VCD (was Re: cvs commit: src/sys/dev/ata atapi-cd.c)) Message-ID: <v04220808b6927dd3b3bc@[10.0.1.4]> In-Reply-To: <20010123104225.A16006@wantadilla.lemis.com> References: <200101211447.f0LElEk04073@mobile.wemm.org> <KAECKEJJOLGHAFGGNIKMAELICAAA.res02jw5@gte.net> <20010121145018.A73989@citusc17.usc.edu> <20010121165422.A44505@peorth.iteration.net> <v04220821b691222656eb@[10.0.1.2]> <20010122103136.L93049@wantadilla.lemis.com> <v04220824b69129ce24ec@[10.0.1.2]> <20010123104225.A16006@wantadilla.lemis.com>
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At 10:42 AM +1030 2001/1/23, Greg Lehey wrote: > Nor would it make much difference, since the analogue networks in > Europe are much less well developed than in the USA. Keep in mind that we're talking about one theoretical phone that can supposedly get coverage anywhere in the world. The analog portion would be intended for use primarily in the US, in those places where you can't get GSM, TDMA, or CDMA coverage. > Are you sure that you can get combined GSM/CDMA phones? They'd be > particularly useful in Australia, where we have only partially > overlapping GSM service (in populated areas) and CDMA (in the > Outback). There are no phones which will do both, and a salesdroid > recently told me, full of conviction, that there would never be such a > beast. To the best of my knowledge, there are not currently any combined GSM/TDMA or GSM/CDMA phones. I do recall reading something about a year ago about some new TI DSP chips that were coming out that should make it possible to have a single phone handle every type of network that exists in the world (including even satellite, if you had the right transceiver electronics), but that it probably wouldn't start showing up in actual phones for about another year. I don't recall having read anything about it since. > No. I've never lost one. I've lost two or three. >> I'd much prefer to have the multiple NAM capability in the phone >> itself, and not have SIMs at all. > > It doesn't address the issue I've mentioned. I think multiple NAM capability would address most of what people use SIMs for, and if the phone manufacturers made it easy to transfer NAM information from one phone to another (e.g., just beam it across, as you can share phone number information via infrared with many Nokia phones, or transfer information from one Palm Pilot to another via infrared), then I think that would largely solve the other problems, too. > How do you move your personal phone directory? Personal phone directories should be stored in the phone, and not on the SIM. SIMs don't have enough space for the phone directories (only 100 entries), and they don't allow long enough text labels per entry. Again, if you need to transfer them, do it by infrared. > Ah. Assuming the people know how to do it. The people at the store would obviously know how to do it. Phone manufacturers could make it easy to transfer information like this, and doing so would help address some of the crime associated with cell phones -- you'd no longer have a SIM (or a NAM) frequently being transferred from one phone to another, or the same phone frequently swapping SIMs (or NAMs), and therefore you could use phone fingerprinting techniques to home in on potentially suspicious activity that could warrant further investigation. -- These are my opinions -- not to be taken as official Skynet policy ====================================================================== Brad Knowles, <brad.knowles@skynet.be> To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message
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