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

To: DenverTechie who wrote (1606)	7/20/1998 4:54:00 PM
From: P.T.Burnem	Read Replies (1) \| Respond to of 12823

I'm a professional engineer working on "last mile" solutions for telecommunications companies nationwide. I would be more than happy to answer technical questions the thread would post to me. Great! I suspect that the peak bandwidth of the average phone cable is well below its theoretical max (due to crosstalk, among other things). Could you give us an idea of how many 1.5Mb/S xDSL channels could be squeezed into a real-life phone cable? Thanks, PTB

To: DenverTechie who wrote (1606)	7/20/1998 5:29:00 PM
From: MikeM54321	Read Replies (1) \| Respond to of 12823

"If a 1.5 Mb/s service is offered by your phone company, you have 1.5 Mb/s dedicated to your line, guaranteed availability at that speed." DenverTechie, Thanks for your response. I've got a question I've been wondering about concerning ADSL. Is this service delivered via a circuit switched or packet switched network? It is just hard for me to believe that 1.5Mb/s can be delivered under real world conditions, unless it's sent over a traditional circuit switched voice network. Thanks, MikeM(From Florida)

To: DenverTechie who wrote (1606)	7/22/1998 8:20:00 PM
From: MikeM54321	Read Replies (1) \| Respond to of 12823

"DSL is a dedicated service technology. If a 1.5 Mb/s service is offered by your phone company, you have 1.5 Mb/s dedicated to your line, guaranteed availability at that speed. Cable modem technology, on the other hand, is a shared service and as usage in the network goes up, the speed goes down." DenverTechie, I have another more straight forward question to ask, if you don't mind. I've always wondered about this and now is my chance to finally get an answer. I think we've all experienced times when we go to make a voice call and we get a message saying, "Sorry. All circuits are busy. Please call again later." I read something like, if 30% of my neighbors made a call at the same time, I wouldn't be able to. If 30% signed up for 24x7 xDSL service, wouldn't we overwhelm the local CO? So if xDSL is a 24x7 service, then how can it be dedicated and guaranteed? I believe you may say, "xDSL It's a packet-switched service so it won't overwhelm the local CO." But if it is, then it's not really, "dedicated" as in a true "dedicated" POTS circuit-switched voice connection. What am I missing? Thanks, MikeM(From Florida)