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To: Keith Hankin who wrote (1197)	1/20/1998 7:56:00 PM
From: Bob Zacks	Read Replies (2) \| Respond to of 29970

Can someone comment on the article .It sounds very confusing to me . How is todays Msft INTC announcment going to effect @Home? They make it sound as if you can now get high speed over a common phone line. Very misleading. Also, that was some timing for an announcment. wired.com

To: Keith Hankin who wrote (1197)	1/20/1998 11:41:00 PM
From: Altec	Read Replies (3) \| Respond to of 29970

>>> I read that cable modem speeds depend on how many >>> users are using the lines at the same time, while this >>> is not the case with DSL. IS this right? >>NO, this is fundamentally wrong (and pure DSL marketing B.S.). > No, this is not pure DSL marketing B.S. The problem is that much of > the existing cable was setup with only broadcast in mind and not > for Internet access, whereas everyone phone lines are inherently > setup for bi-directional, point-to-point. This is one of the main > reasons why the cable to the home needs to be upgraded, so that > there is no performance bottleneck into the home. Ummm, nope again. The cable upgrades are to enable bi-directional access to the home, not to address a "performance bottleneck into the home". DSL's bidirectional point to point is (heavily) concentrated in the CO into a DSLAM where it's loaded onto a circuit bound for the overloaded Internet through an ISP. Overloading ratios for DSL are typically 100:1 or more (meaning 100+ "1.5 mbps" DSL users sharing a single 1.5 mbps T-1). The advantages of dedicated 'point-to-point' DSL is a fallacy. Instead, @Home users share a much larger bandwidth on the neighborhood coax segment, and they've got an architecture specifically designed for high-speed. In comparison, DSL is a joke. I suggest you re-read the 'xDSL myths' piece on the @Home site (www.home.net), or check out the discussions on comp.dcom.xdsl (where the 100+:1 DSL concentration was discussed in detail recently). --Altec

To: Keith Hankin who wrote (1197)	1/21/1998 1:49:00 PM
From: ahhaha	Respond to of 29970

DSL suffers from the same condition bidirectional notwithstanding. If the system load is great enough the DSL connection slows and is far more vulnerable to retransmission. The transmission speed drops substantially in order for error correction and to avoid data loss. Part of the problem is that a voice connection can't tolerate this disruption so that if data and voice are piggy-backed, failure of the combined signal has a residual effect of disrupting the voice component, so all lines slow as the load increases. ATHM gets around some of the excess load problem with the RDC and headend setup that is the hallmark of the ATHM solution. This isn't talked about much, but TWX doesn't have a comparable solution. As far as cable existing plant is concerned, the so-called broadcast unidirectional transmission quality of fibre is only limited in upstream. It takes HFC to achieve near downstream speeds. Upstream speed is not very important now. It is difficult to say to what extent, say, TCI has upgraded its existing system to HFC. I know my office building was repulled a year ago, and I didn't know then why they were doing it. In many cases TCI only replaced coax with low grade fiber, but that is still good, bidrirectional and far superior to DSL. TCI's intent is tv low grade interactivity like video on demand, email, some form of shopping. TCI could care less about net access because this is a minority of the potential interactive market. The net would be eventually helped with substantially higher upstream speeds, but this isn't important for the TCI strategy and in most cases not important for the net, so they put in mediocre and cheaper fiber. As fas as comparing cable and DSL goes, all you need to do is sit down to an ATHM loaded PC and play with it then do the same with the best DSL solution. It's a no brainer, as Melissa McAuliffe would say.