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Technology Stocks : LAST MILE TECHNOLOGIES - Let's Discuss Them Here -- Ignore unavailable to you. Want to Upgrade?

To: Kenneth E. Phillipps who wrote (1946)	8/24/1998 11:24:00 AM
From: DenverTechie	Read Replies (1) \| Respond to of 12823

I'd be more than happy to look at this Nortel article for you. Will probably be a few days, I'm snowed under right now on a hot project for TCI in the San Fran Bay area. Get back to you later.

To: Kenneth E. Phillipps who wrote (1946)	9/18/1998 3:52:00 PM
From: DenverTechie	Respond to of 12823

Ken, this is finally responding to your T1 Replacement article posted on 8/22. At the risk of seeming flippant, this is a pretty good example of propaganda on the part of NORTEL. While it is true that channelized/TDM systems have a hard time with the IP world, the Y2K problem emphasized in this article is overhyped. The cost to upgrade this equipment to Y2K is not tremendous and recently purchased equipment is already Y2K compliant. However, if you are in the market for an upgrade anyway, besides the Y2K problem, then the NORTEL suggestion could make some sense. To answer some your questions directly: 1. I saw no reference in the article to WDM, which is a high capacity fiber based technology, but many to WAN. I think that is what you are referring to. 2. An ATM WAN enterprise network switch is a small switching platform with an ATM backplane that usually will have many different front end interfaces to X.25, frame relay, etc. protocols that will come into multiple locations at a company "enterprise". The ATM part of the name consolidates all of the different types of traffic as in voice, data, video and converts it all into cells for transmission on a common medium. Constant bit rate (like voice) and variable bit rate (like data) traffic all travels together in ATM. This is different from T1/T3 muxes which are strictly channelized and optimized for voice traffic. Data is "shoe-horned" into the channel structure and the bit rates are specified and fixed and totally inflexible whereas ATM is very flexible. Hope that helps. Let me know if you have any follow up questions.