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To: Pullin-GS who wrote (28551)	12/22/1997 4:22:00 PM
From: hal jordan	Respond to of 61433

Paul-- I'm curious about your take on ATM for the residential broadband market. It looks more and more likely that Ethernet over ADSL is going to lose out in favor of PPP over ATM over ADSL. Many vendors manufacturing ATU-Rs are seeing the limitations of strictly RFC1483 implementations and are edging towards the Microsoft (Kwok) penned pre-standard. What are your thoughts about this market? Cable also looks like it is edging towards ATM for HFC networks. If you believe that high-speed residential broadband access through either xDSL or cable is going to be big business by the year 2000, then ATM should be the standard WAN transport scheme to carry that bandwidth over the pipes. Lend me some of that CCIE expertise on the following subject too: xDSL transport of ethernet frames back to the CO whereupon a DSLAM converts it to ATM versus an end to end ATM stream from ATM NIC (or RFC 1483 compliant ATU-R) to the DSLAM. Drawbacks on either scheme? I'm thinking the Ethernet frames lack traffic shaping and can overshoot the line rate therefore promoting cell loss after the PCR is reached. Hal