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Originally Posted by aspdd watsrr
A question then that I read somewhere else but no-one ansered!
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NTLââ‚Âà ‚¬ÃƒÂ¢Ã¢â‚¬Å¾Ã‚¢s new tiers consistently offer a 10:1 ratio between downstream and upstream havenââ‚ƚ¬Ã¢â€žÂ¢t NTL moved over to 3.2Mb and MC28 cards meaning that each upstream can be 8 X 3.2Mb = almost 26Mb.As docsis downstreams are only 27Mb why cant NTL offer a more symmetrical service?
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LOL I love it when people look up a few buzzwords and try to make out they have a clue.
Firstly MC28 cards offer 2 downstreams and 8 upstreams, that would suggest 4 upstreams per downstream, wouldn't it?
Secondly 3.2Mb? Erm, no, moved to 3.2MHz wide upstreams, which offer after overheads about 4.4Mbps a piece.
Third DOCSIS downstreams aren't only 27Mbps they can be 27 or 38.
Fourth, MC28 cards actually reduce the upstream bandwidth available per downstream most of the time - they are there where areas are using lots of downstream compared to upstream, and have certainly not replaced the MC16 cards.
Finally can't offer a more symettrical service because in some areas even with 10:1 ratio on downstream to upstream upstreams get maxed well before the downstream. Due to statistical contention 4x4.4Mbit doesn't go nearly as far as 1x17.6.