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

To: lml who wrote (7419)	6/26/2000 12:50:00 PM
From: Frank A. Coluccio	Respond to of 12823

Mike, Your take is essentially correct. And lml went a ways to expand on it. Video on Demand (VoD) 'does' leverage the capabilities of switched digital video (SDV), although they are not one and the same in feature definition. One is a platform (SDV), and the other (VoD) is one of among many "services" that can be supported by SDV. The other 'prominent' service being regular programmed video. SDV is also capable of supporting OVS, open video services, where the user can select programming from other providers who are not a part of the MSO's or ILEC's main staples. But this form of open (OVS) networking did not take off the way it was perceived during the early Nineties, and it appears now that Internet Video over IP (albeit in many cases supported by ATM at the lower layer) will probably fill this void. I'd enjoy reading comments on this subject. Whatever happened to OVS? VoD implies a stored program that is not necessarily being broadcast but is available on the basis of individual user whims. Note: When I stated that VDSL was not a broadcast and select form of transmission, I was referring to the loop section only. As lml points out, b&s does in fact exist, but on the backbone to the RT, not from the RT to the residence. ------- lml, You asked: "... you seem to address this issue by implying that an HDTV signal consumes the same approximate bandwidth as an analog signal. Is this correct?" Regular NTSC program video, when compressed in MPEG format, can be represented adequately with 6.3 Mb/s (T2 speeds), or by 3.x Mb/s (T1-C speed), depending on the nature of the broadcast and the quality proposition that the provider allows. It can also be super-fine at 12 or 25 meg. "What is the bandwidth range of VDSL? The range seems quite broad, and I defer to you guys here for the "full monty" on this issue. Is 25M bps the low end? Is 50M bps the high-end?" I don't know if "everyone's" conformed to this convention, but I've seen vdsl characterizations ranging anywhere from 12 Mb/s to 52 Mb/s, sometimes accompanied by distance criteria, where at the low end (12 Mb/s) the residence would be farthest away, and at the high end (52 Mb/s) closest, within several thousand feet. HTH. FAC

To: lml who wrote (7419)	6/26/2000 2:58:00 PM
From: MikeM54321	Read Replies (1) \| Respond to of 12823

"I was told that an HDTV signal consumes about 3 channels of bandwidth, not 5." lml- What I read was a single HDTV channel takes the place of 4 or 5 DTV channels. Conincidently, 1 analog channel can be replaced with 4 or 5 DTV channels. So if an MSO went to an all digital system(which won't happen for awhile), then the MSO would be able to offer 4 or 5 times the channels being broadcast via analog today. So what's that? About 500 useless content channels!<g> So the bottom line is, IF MSOs converted to a fully HDTV network(which won't happen for a LONG time), then going to digital would have no benefit to today's analog MSOs(in terms of increasing channel count to their customer). Kind of a funny coincidence. -MikeM(From Florida)