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To: qdog who wrote (8992)	3/2/1998 11:40:00 PM
From: Valueman	Read Replies (1) \| Respond to of 152472

How's this for "pulling it all together?" Intelsat is in a trial in Peru, where a town is installing a WLL system(I do not know what type) and Intelsat will link this town's WLL to the telephone system via GEO satellite. Now THAT is an excellent use of available technology to provide instant state of the art infrastructure at a reasonable cost.

To: qdog who wrote (8992)	3/12/1998 10:19:00 AM
From: rhet0ric	Read Replies (1) \| Respond to of 152472

rhet0ric here, back with more stupid technical questions. (Your patience is very much appreciated). The Internet, as you know it, is already riding on TDMA legacy systems. There is a migration to delivery by ATM & Frame relay (which is packetized), but your backbone is still DS-3 and T-1. You're connection to an ISP is still DS0 for modem traffic and ISDN. My question had more to do with the protocol the Internet uses, TCP/IP, than the types of network that the protocol uses. Maybe I'm comparing apples to oranges, but I was asking about the difference between TCP/IP and CDMA or TDMA rather than between one network format and another. Maybe what you're saying is that CDMA and TDMA are network formats, not protocols. Let's take an example of a chunk of information, whether it's someone speaking a sentence into a Q or TDMA phone or me submitting this response to SI, and then describe how the various methods ensure that the message gets from A to B. (TCP/IP is the only one of the three I feel that I understand, so if my description of C/TDMA are totally off, feel free to make fun of me). TCP/IP: breaks the message up into packets, codes each packet with the destination IP address and the sequential number of the packet, and sends them off. CDMA: breaks the message up into packets, codes each packet with the destination address and the sequential number of the packet, and sends them off. TDMA: establishes a connection with the receiver and sends the message, which gets broken up into time-divided chunks depending on the bandwidth usage of others speaking at the same time. You can see, given my understanding, why I thought that CDMA and TCP/IP were more closely related than TCP/IP and TDMA. However, CDMA is a better system when it comes to spectral efficency and a bit more robust in the interference department than TDMA. Ultimately, the technical details above don't matter as much as the real-life relative capabilities of sending TCP/IP packets over CDMA or TDMA. Should I take it from your comments above that CDMA is a better carrier of TCP/IP packets than TDMA? (I ask all this because I see an eventual convergence of wireless and Internet technologies, and I want to know which wireless technologies are better positioned for that convergence). thanks, rhet0ric