|Originally posted by Baraxe
Before you go spouting off you should really do your research. I support many ISP's. You will see tons of different speeds and technologies depending on the ISP. Most of the small modern high speed ISP's can do 100MB to a box very close to the home if not directly to the home. They typically do a Gig uplink from the street if Ethernet , or they do a OC-3 or OC-12 uplink to their backbone if it is ATM. If you live in a major metro. you may even see much higher speed uplinks depending on the equipment manufacturer. Yes, most cable modems can't do more than 10Mb/s, but many places have fiber to the home. It really just depends on where you live as to what your infrastructure looks like. My point is that you really can't make any general statement like most cable companies can deliver roughly 45Mb/s accross their networks. I can't name one cable provider I know that is running speeds that low. The slowest I know of are OC-3 155Mb/s ATM links. I can show you several that can do Gigabit speeds, and they could actually deliver it to your door if you were willing to pay for it. All they need to do is swap out their 10/100 card going to your house demark with a gig card, and running fiber or Cat5e into your home.
What part of "I'm discussing HFC networks (i.e., cable modems)" confused you, exactly?
As for me "doing my research", let's not get into a credentials war. You'll lose. Trust me.
Now, if you'll excuse me, I have to go do some more work on the system that we're getting several million dollars from Paul Allen for. Then, I need to do some more work on the covert-channel packet transfer code I'm prepping for BH2k4, and make some headway on the O'Reilly book I'm proposing, now that the galleys for my last book have been sent to the publisher.
 never mind. I don't have time to play games with you. Tell you what: Go learn what a CTMS does, how QPSK and QAM work, and then explain to me how, exactly, you're going to get more than 35-45Mbps out of the last mile. Then, go read up on elementary economics and the practice of overselling, and explain how, exactly, a cableco is supposed to turn a profit without raising rates substantially (and, by substantially, I mean above the $500/mo I could pay now to get a T1 to my door) and provide anything approaching 10Mbps.
I don't care if my ISP has quad-redundant OC-192 sitting a block away from me. As long as there's a CTMS headend, that bandwidth isn't accessible to me as a customer. And guess what, chuckles: every major cable provider uses an HFC architecture incorporating CTMS headends.
So, if you want to continue posturing by running down the litany of OC capacities, be my guest. But it's irrelevant and, franky, amusing. At least until you do it two or three more times. Then it'll just be sad.