From owner-freebsd-chat  Mon Jan 22 16:19:49 2001
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From: Terry Lambert <tlambert@primenet.com>
Message-Id: <200101230019.RAA05346@usr08.primenet.com>
Subject: Re: GSM vs. CDMA (was: VCD (was Re: cvs commit: src/sys/dev/ata atapi-cd.c))
To: keichii@peorth.iteration.net
Date: Tue, 23 Jan 2001 00:17:47 +0000 (GMT)
Cc: grog@lemis.com (Greg Lehey),
	brad.knowles@skynet.be (Brad Knowles),
	kris@FreeBSD.ORG (Kris Kennaway), freebsd-chat@FreeBSD.ORG
In-Reply-To: <20010121182033.C44819@peorth.iteration.net> from "Michael C . Wu" at Jan 21, 2001 06:20:33 PM
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> GSM is a set of protocol for mobile phones, and so is PCS.
> I tend to think of them as being comparable to TCP vs. UDP.

[ ... ]

> | Don't forget that they have recently started introducing GSM into the
> | USA.  I've found that it works better than the CDMA service.  This has
> | nothing to do with the relative merits of the technology, but with the
> | fact that the service providers learnt that their cell placement was
> | too sparse for the old analogue/*DMA network, and they placed them
> | closer for GSM.
> 
> Yes, I recently switched from AT&T PCS to Voicestream GSM in America.

The salient point is that GSM is not all you need to hook in.

In case this wasn't obvious: don't expect your GSM phone from
outside the US to work in the US, Canada, or Mexico.  The US
GSM system uses a different set of frequencies, so unless your
phone is multifrequency as well as multimode, it won't work.

Actually, I've only seen a couple of phones that are capable of
multimode _and_ multifrequency, and they were very expensive;
you might as well just have two phones...


					Terry Lambert
					terry@lambert.org
---
Any opinions in this posting are my own and not those of my present
or previous employers.


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