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Originally Posted by James Henry
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Cable systems in the UK have a range between 5 and 30MHz, 5 and 40MHz, 5 and 55MHz and in some cases 5 and 65MHz for upload use. Not all of this band is going to be usable due to the much higher ingress present in the upstream path.
The download spectrum can be as much as (in some areas) 54MHz to 880MHz.
Just a minor point that isn't as apparent as the specifications on the google searches you're doing to get the cable info.
Seems a little asymettrical to me in any case.
NTL's 2xx series modems are DOCSIS 2 compatible, they just appear to be skipping it and going to 3 instead.
I'd quite like to see higher upstream speeds, and think there should be some room there to increase them. Making them symettrical to help with torrent ratios isn't really an incredible commercial enticement to spend the required cash though.
FYI ntl's upstreams aren't even 10Mbit line rate  Some Telewest areas with their magnificent 384kbps upstream on 10Mbit are however.
Moral of this story - upstream use is disproportionate to downstream use, another incentive to not offer symettrical services.
BTW you forgot to mention that sustained uploading on Optimum Online tends to cause them to reduce your upload to 128kbps for a while or until you phone in. Doubt that they'd tolerate torrenting at full pelt. |
i must appologise, when i said "thats so wrong, at least generally labeling cable as less capable in the upload department." it was not my intention to imply that docsis cable is infact 'symmetrical' its clearly not, hence why that US firm is trialing that Narad Networks tech.
my intent was mearly to point out that given the upload and download rates we have had available to us so far, then that ment that the current docsis1 could be considered from at least from an end-users POV as capable of appearing 'symmetrical' even if its not really, and in that sense is just a capable as others old tech.
i dont get this constant bringing up of torrents all the time, it most be possible to produce a package to sell to these people at an extra cost to offset and encurage more profit. perhaps a simple 'pay as you go' paypoint account that you top up at any local shop, then have them go to the special NTL website/server to switch their cable modems over to the seperate channel or whatever for the hour or whatever they payed for, just one option of many to make it profitable and convenient i'd think.
what about offering them a second cable modem install on a special rate with say a 512k/512k ?, and/or 1m/1m wonder if there would be takers, not to mention it might be a good way to recycle the old modems as the new ones come into service.
your also in favour of better upstream, as im i, and probably a lot more, dont you think that many of these new video streaming devices and more i'v already mentioned have the potential to match or even exeed this ISP torrent aversion in taking the available bandwidth ?.
when you said "FYI ntl's upstreams aren't even 10Mbit line rate
Some Telewest areas with their magnificent 384kbps upstream on 10Mbit are however." i dont get it, are you saying that for instance the wythenshawe's baguley centre nynex/C&W/NTL network or cables is in some way lacking shall we say ?, whats wrong and what needs replacing ?.