At 22:00 2001-01-26, you wrote:
>Gustaf Rosell wrote:
> > At 19:03 2001-01-26, you wrote:
> > >With a tri-band GSM phone I can get service in most countries that have
> > >some cell-phone network, the most important exception being Japan. A
> > >dual-mode phone might correct that, but if I'm not mistaken this phone
> > >only supports the 900 MHz GSM band. That means it won't work in the US
> > >(and maybe other countries if they only use the 1800 MHz band). I
> > >wonder what the target market is for this phone, and how large that is?
> > Quite large. Western Europe, large part of Eastern Europe, larger
> > parts of Asia with important locations like Hong Kong, Singapore,
> > Australia and Malaysia. The most important exceptions are South Korea,
> > South America and North America.
>That's surely the area in which it can be used, not the target market.
>I understood that it would only be sold to Japanese residents.
> > So for a travelling Japanese user it is quite useful. It's a pity
> > that it's an inferior phone.
>Well I was wondering how many Japanese travellers go mainly to those
>places and not to the US. (And isn't the PDC system usable outside
>Japan, e.g. in Hong Kong?)
A lot. But I would expect that there may be a 3xGSM/1xPDC in the future.
> > I know that one of the manufacturers are working on a 6 band phone with a
> > target weight of 180 g. 3xGSM, 2xCDMA, 1xPDC.
>You are confused.
Most likely. But not that much in this matter. You are somewhat rightish in
that TDMA is a digital radio technology, but it is also a standard (IS-54),
the preferred 2/2,5G of AT&T until DoCoMo came and shaked things around.
GSM and PDC are TDMA derivates. With CDMA I guess they meant cdmaOne/PCS
according to the IS-95B standard on 800 and 1900 Mhz respectively.
>CDMA and TDMA are different techniques for multi-
>plexing radio signals; they are not specific phone systems. GSM uses
>TDMA and I believe PDC uses CDMA.
>I do not speak for Roundpoint; any opinions I express are my own.
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Received on Sat Jan 27 00:17:06 2001