On Sun, Jan 18, 2004 at 01:40:46PM -0800, Nano Nano wrote: > On Sun, Jan 18, 2004 at 04:18:48PM -0500, Brett Carrington wrote: > [snip] > > I'd guess the cable modems are ignoring data not meant for you > > specifically. The actual cable line still carries all data however and > > it's just a simple matter of modulating/demodulating it. > > Just how much bandwidth are those cables capable of carrying? > > I've always wondered: is every cable channel coming to my house > simultaneously, plus all this broadband traffic? I seem to recall > hearing the number "155 megabit" sometime. Are they using most of it? > > It seems like when they planned cable television in the 1970's they > sure planned in a whole heck of a lot of capacity. Yes all the channels and the traffic are coming on the same wire. Each channel is at a different frequency (kind of like for regular antenna reception), and the tv picks out whichever channel you want. Well they planned at least 100 hundred channels of fullscreen analog video so that's quite a bit of bandwidth, and they're only using the cable a short-distance nowadays for the local-loop, with the main connections being fibre-optics, etc. Bijan -- Bijan Soleymani <bijan@psq.com> http://www.crasseux.com
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