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Technology Stocks : Cisco Systems, Inc. (CSCO)

CSCO 78.16

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Dec 26 9:30 AM EST

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To: Techplayer who wrote (26514)	6/22/1999 9:38:00 AM
From: The Phoenix	Read Replies (1) of 77400

Brian, I dont' think the article was written by anyone that is very well informed. First DSL and Cable do not preclude ATM or IP. They are different OSI layers. You can run ATM over either...and IP as well. In fact the G.lite specification is wrapped around ATM SVC's. The issue with G.lite is that there is not enough bandwidth (per the spec.) to deliver more than one broacast signal to the home. So, if you have two TV's you'll both have to watch the same thing. <g>. Cable on the other hand has been moving towards DOCSIS which at it's core is IP. Cable has more bandwidth and can deliver more channels (simply by nature) than can G.lite..thus that would appear to favor the cable companies. I suspect that since the MSO's have more to lose that they will rally beind HDTV and they'll do it with the infrastructure that their currently begining to deploy which is DOCSIS 2.1...which includes QoS on IP. The RBOC's still are too worried about bandwidth and charging for bandwidth..they still don't get the service based pricing model..as was evidenced by the aritcle you posted. So, I guess the argument over IP versus ATM is moot. The bigger issue is which Layer 1 technology DSL, or Cable can reach all the homes with quality HDTV service (both cable and DSL are struggling with thier own infrastructure issues), and then what higher layer protocols are they predisposed to. I would not make an issue of IP dropping packets since IP has put mechanisms into place which assure timely delivery of packets. One thing I believe is fairly certain...there is no chance that a carrier will run a T3 ATM VC to each and every home in the US which is what they'll require to run multiple broadcast CBR video streams. Wanna talk about bandwidth... CBR is the worst offender of bandwidth use....OK..maybe rtVBR.....still.. the issue I don't believe is IP versus ATM in this case. OG

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