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To: Geof Hollingsworth who wrote (279)	9/21/1999 6:30:00 PM
From: Bernard Levy	Read Replies (1) \| Respond to of 792

Hi Geof: I agree with all the names on your list (CSCO/MOT, NT, LU, NN, and Siemens/P-Com). To this list, I would add: GMH: they appear poised to win a big P-MP contract from Winstar. Apparently some of the technology originated from earlier classified work. It is also worth noting that satellite operators have a long experience in the area of wireless networking. Triton Systems: used by ARTT for its wireless fast Ethernet ring architecture in San Jose. Its technology has also a military origin (from LMT, I believe, but my memory may be faulty on this point). Further down the road, Ensemble Communications in San Diego will probably have cutting edge products, but I am not sure when they will be hitting the market. The key debate right now in LMDS deployment is point to multipoint versus ring-like or mesh-based networks. A number of publications have recently featured articles arguing that mesh-based architectures are preferable, such as the article telecommagazine.com The main criticism of P-MP in the article is that ``it fails to offer all the available bandwidth to all users all the time.' But the article does not mention is that because Ethernet is contention based, wireless fast Ethernet is not much better. It is true that early P-MP systems relied on frequency division multiplexing or time division multiplexing, but newer wireless ATM software really allocates the entire bandwidth on a statistical contention basis. My reservations vis a vis ring-like architectures is that they seem to be targeted at fairly large buildings, the kind that might ultimately be connected with fiber. P-MP is more focused on the small building market, which is the sweet spot of the broadband wireless market. Best regards, Bernard Levy