[LINK] super-fast cable broadband (1)
chris at sw.oz.au
Fri Mar 13 01:44:49 EST 2009
On Thu, Mar 12, 2009 at 02:01:55PM +0000, stephen at melbpc.org.au wrote:
> Telstra today announced that its hybrid fibre coaxial cable broadband
> network in Melbourne will be upgraded to 100Mbps - more than triple the
> current peak speed - by Christmas.
What the release doesn't say:
1) The HFC network is a shared resource - the mythical 100Mbps is only
possible if no-one else on your cable segment is using anything and
then only under ideal conditions. If Telstra push ADSL users onto
their HFC network to keep their monopoly over the last mile, then
the bandwidth experience is likely to be much less than 100Mbps.
2) The HFC uplink speed is a max 2Mbps upstream with DOCSIS3.0 - and
there may be a handful of upstream channels to share with the other
punters on your coax cable segment. I suppose there's a better
chance of getting VOIP and torrent type services going with a shared
piece of 2Mbps than with the 128Kbps of DOCSIS2.0 but it's still pretty
shabby when compared to ADSL, leaving aside Annex-M uplink speeds.
You'd have to be an idiot to migrate from ADSL to HFC - say, a typical
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