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To: w molloy who wrote (9293)	3/18/1998 3:47:00 PM
From: Teegir	Read Replies (2) \| Respond to of 152472

CDMA, TDMA and GSM air interfaces were all envisioned to have 'data' capability. It took GSM 8 years to get around to handling 'fax' via a data stream. You can get 'messaging' in GSM/PCS-GSM already, and in TDMA and NB AMPs as well - very short paging type messages. Data at slow speeds takes lots of system resources, and most people aren't going to pay 10-50 cents/min at 4.8 or 9.6 kb/sec. As to radio, everything is analog once it hits a modulator - everything mentioned. CDMA provides better, clearer service over TDMA and AMPS. US-GSM(in some PCS systems) is nice, but not as efficient as CDMA. All have good/bad points, so useless to argue as to which is 'superior' unless you define all the parameters of interest first! Providing a service, just not an 'air interface' for data is what people want. Lots of people have tried to deliver EMail over radio, and all have flopped because every corporate internal system is different.