[clug] Transact Progress(?)

Brian Morris brian at netspeed.com.au
Fri Aug 22 15:07:52 EST 2003

It 'sort of' could be done in theory...

An MPEG2 video stream (which is what the TransTV is delivered over) requires
between 2 and 6 Mb/s of bandwidth per channel depending on resolution and
audio.  Most Fox channels require a little over 2Mb/s, Prime requires
5Mb/s - go figure ;-)

Potential ADSL speed drops off significantly beyond about 1.5km due to
transmission loss.  If you were nearby to the exchange (say 500m) on a good
line you may be able to get as much as 6Mb/s but good luck if you are
further out than that.

Having said that, it wasn't long ago that we could only get 14.4k out of a
dial-up modem so it is quite possible that additional performance could be
sucked out of the same ADSL line in the not to distant future.  DSLAMS used
to take up a big chunk of a 19" rack, now you can get a "pizza box" sized
DSLAM that support up to 36 ADSL lines at 8mb/s each  :-)

Regards,   Brian.

----- Original Message ----- 
From: "Andrew Pollock" <andrew-clug at andrew.net.au>
To: "Brian Morris" <brian at netspeed.com.au>
Cc: "Andrew Pollock" <andrew-clug at andrew.net.au>; "Irena and Richard
Jenkins" <rjenkins at alphalink.com.au>; <linux at lists.samba.org>
Sent: Friday, August 22, 2003 2:02 PM
Subject: Re: [clug] Transact Progress(?)

> On Fri, Aug 22, 2003 at 12:48:00PM +1000, Brian Morris wrote:
> > > AFAIK TransACT has ceased their rollout per se. I've heard they're
> > > investigating leasing unbundled local loop (ULL) instead.
> >
> > I think this is pretty close to correct, but ULL will not deliver TV.
> > sales force (door knockers) are now 'seconded' to ActewAGL to flog their
> > products.
> >
> > Read into that whatever you want :-)
> I think you could do TV over ULL, it's just never been done before. It's
> "dark" copper, you could run whatever you like over. AFAIK, TransACT comes
> into the home in copper as well. I'm not up on the ins and outs of
> TransACT's transmission methods, but I can't on the face of it see a
> reason for TV *not* to work over ULL in my limited understanding of it.
> Andrew

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