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To: Raymond who wrote (8566)	2/16/1998 1:49:00 PM
From: qdog	Respond to of 152472

Telephony is a biased mag these days. Hardly one that I use for technical purposes anymore. In the early days of AMPS, there was serious talk of going digital and not analog. The problem was microelectronics and capacity. Believe it or not, a true 64 Kbps digital channel doesn't not equal a voice analog channel in B/W. GSM was an idea proposed by the French to standardize Europe in what was touted as the next generation wireless. It orginally was designed to be ISDN, which is 64 Kbps. It still could do that, but you will not get any capacity increase vs. AMPS. Quite the opposite, you will get a DECREASE. It is a channelized system that requires guardbands between channels. Spectral efficency is further errode because of this. It's TDMA no matter how you want to slice it and it is inefficent in using spectrum. It is also the least flexibile to adapt to the ever rapidly changing dynamics of the data community. Explain why the big and rapid movement in the traditional wireline to Frame Relay and ATM? Data is the big demand user that is growing expotentially, not voice. I can subrate a 64 Kbps to 8 K channels, but a 8 k channel will not do 14.4 data unless they utilize compression. Sorry you can't but a fully grown watermelon into a Pepsi bottle, unless you do something like crush it up and concentrate it down. However, in theory and practice, CDMA is an on-demand delivery system to the user's needs. BIG ADVANTAGE.

To: Raymond who wrote (8566)	2/16/1998 4:41:00 PM
From: Harvey Rosenkrantz	Respond to of 152472

If I recall correctly from comments made at the meeting,the whole point of the Vodaphone trials was to overlay a cdma air interface on a GSM system, fooling the GSM switch to handle the cdma call and thus capitalizing on the existing GSM infrastructure. I'm not a techie and I may be wrong, but I think that if this is true and your point is correct about the richer protocol being GSM rather than IS-41, this may be a great way to go.

To: Raymond who wrote (8566)	2/17/1998 1:06:00 AM
From: Quincy	Read Replies (2) \| Respond to of 152472

Raymond, I appreciate your knowledge and your insight to GSM. But, how is the GSM MAP protocol going to make my life as a consumer easier? With the QCP2700, every CDMA provider has dual-mode phones available to provide universal coverage. While MAP is superior in ways most customers don't understand (or even the providers), was it such a bad idea to chose IS41 to meet market demands? Your assertion that MAP is the primary reason why GSM leads sounds suspect. Just where is the concentration of GSM? It doesn't appear to be on this hemisphere. I have heard many justifications for the GSM "smart card" and the "smart chip." Can I equate that with "dropped calls?" Do we really change phones that often? Are there smart-chip phones available that don't fail? B-) I do apologize for bringing DECT into this foray. The totaltele article mentioned DECT but only in the sense that the ETSI WCDMA standard would replace DECT in WLL applications. I am losing my memory in my old age. UTRA wants to solve GSM's capacity problem at the expense of coverage. All that for more data? Where is the customer base that can justify the cost of high-rate WLL data in the face of wired economics? Since the hardware is a small part of the cost of a single base station, I don't see how "economies of scale" can help. It still costs the same to erect an antenna, get electrical service, lay the fiber infastructure, get permits, etc... Since base stations rely on a network of their own, when will customer density justify wireless data? As far as GSM in Chile, I wonder how well it will compete cost-wise, as capacity becomes an issue. Did the GSM provider get vendor financing? Chilesat stands to be another contribution to Qcom's profits. Qcom has yet another side-by-side comparison opportunity. I have no problem with it.