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Technology Stocks : Qualcomm Moderated Thread - please read rules before posting
QCOM 174.01-0.3%Nov 14 9:30 AM EST
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To: John Biddle who wrote (20014)3/6/2002 9:47:33 PM
From: engineer  Read Replies (3) of 196650
 
Jeez....You shoulda been a systems engineer.

Exactly.

On teh flip side,

A multimode phone which does GSM and CDMA1x can use any of the available netowkrs around the world if it has a SAIM/RIM card in it and follows the GSM call protocol. It would not care (technically speaking) if it were on a GSM network, a CDMA network or a GSM1x network, provided the phone had teh right network protocol software in it to handle all the differnt call mdoels for all these systems.

So, what can each of them do?

GSM1x can overlay systems where they have GSM to provide higher capacity.

GSM1x can be overlaid in countries where they have both GSM and CDMA if the carriers wanted to have it that way.

Dual mode phones could be used to roam if

1. they went to a country which was entirely GSM and tehy wanted to use it there.

2. They went to a country which was entirely CDMA1x and they wanted to use it there.

3. A GSM1x system.

4. Any mixture of the above.

Note that also if they have GSM in the phone and WCDMA in the phone, they would cover just about all the air interfaces around. Adding UMTS would guarantee that they would make a call (technically speaking again) anywhere in the world.

(on your other question....they have gsm channels which are each like 30 Khz wide, so they can drop out some of them to get to 1.25 Mhz wide slot and then put in ONE CDMA 1X carrier. this way they can keep like 10-15 gsm users and 40 CDMa users on the same 10 Mhz spectrum at the same time)

Now for the last sticking point.

You can use your Visa Card almost ANYWHERE in teh world wihtout any kind of giant check or barrier. Why can't carriers allow worldwide raoming from a billing and acceptance point of view? Why are we in teh dark ages for this, when the wireline guys have gotten it right (hint: has to do with a few coutr rulings FORCING the wireline guys to do it..).
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