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Technology Stocks : The New Qualcomm - a S&P500 company

QCOM 155.82

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Jan 23 9:30 AM EST

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To: Clarksterh who wrote (3897)	12/2/1999 10:50:00 PM
From: engineer	Read Replies (1) of 13582

N, I tihnk you missed why I responded to you, I guess. the channels are all quickly assigned as packet channels and thus do not stay assigned when no data is used. They can be deassigned or assigned very fast as the demand queueing goes up or down. the channels are not "circuit switched" at all, but rahter assigned as packets are needed. Once the modem has a single traffic channel going, it can decode all 64 Walsh streams in parrallel since these are very simple to decode from each other. the reason the MSM3000 can only do 6 is that it must store up all the symbols for a whole frame and decode all 6 serially using hte same DSP engine. It has to do with memory on the chip and space tradeoffs. So assigning a new Walsh channel to use is just a bit in the forward paging channel and the modem can get the next packet with any of hte 6 channels used. I was disagreeing with the "circuit switched" part of your post. I believe that the call will always maintain a single call channel and if no data is going back and forth, it will transmit at the lowest rate.

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