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Technology Stocks : Covad Communications - COVD

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To: Robert T. Miller who wrote (172)	7/14/1999 6:01:00 PM
From: Frank A. Coluccio	Read Replies (1) of 10485

Robert, the only point I'd like to make is that in certain instances it is actually possible for a DSL user to wind up sharing central office aggregation resources (on the backplane) when subscribing to a DSL service, if their service provider is using an Ethernet frame-based DSL concentrator instead of a Bellcore type of DSLAM which employs ATM switching in the backplane. Look to RBOCs and the larger national DSL plays to use the Bellcore model, and look to some of the smaller ISPs and other specialized providers (some CLECs) to use the concentrator variant. Also, several of these manufacturers also allow for dynamic host configuration protocol (DHCP) which effectively leases out IP addresses on the fly, instead of administering static ones. The latter were originally designed for campus and in-building use (such as shared tenant scenarios) but some ISPs have elected to go with them due to their more affordable price tags. FWIW. Regards, Frank Coluccio

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