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To: waitwatchwander who wrote (17455)	10/30/1998 7:21:00 PM
From: Clarksterh	Respond to of 152472

NF - Can't one operate a GSM air interface along side a CDMA air interafce and have both coupled to the same network infrastructure? Sure, just as you pointed out can be done with CDMAOne and GSM. But I think Gregg's point is that it needs to be added on, and the old GSM remains 2g. With CDMA-2000 and CDMAOne the old RF equipment just becomes part of the new 3g service - of course in real life I am sure it isn't quite this simple, but it gets the general idea across. Also, it is undoubtedly true that if a customer decides that they don't have enough capacity and need to add new cell sites, the customer can add CDMA-2000 equipment and be sure that all the users will still be happy. The same is not true of W-CDMA and GSM. Mika, I think you mentioned something about a GSM/CDMA phone. I thought Clark had previously stated that that wasn't economical on the cost and battery front. Yes and no. I originally commented on a dual mode CDMA2000 and WCDMA phone, and I said: "Thus a dual mode phone would probably need at least two separate and fairly sophisticated RF and IF systems. This would make a dual mode phone pretty clunky. (Note that the same is true for dual analog/CDMA phones, but the difference is that analog is so simple that the added hardware doesn't add much space or power consumption.)" A dual mode GSM/WCDMA phone is probably somewhat easier that WCDMA/CDMA2000 just because GSM is less complex than CDMA2000, and I wouldn't say that either type of dual mode is impossible - just pretty clunky compared to a single mode phone. However if they can just delay WCDMA long enough (2004?) it may be possible for Gilder's future to set in and do much of both GSM and WCDMA on one set of chips but with different software. Clark