Re: Goodbye Telstra, Hullo ACTEW (FYI)
Bernard Robertson-Dunn (brd@netinfo.com.au)
Thu, 09 Oct 1997 14:22:30 +1000
Robin Whittle wrote:
>
> "Bill D'Arcy" <billg@netinfo.com.au> forwarded some material
> regarding data transmission over power wires.
>
> There are fundamental physical issues to do with the high frequencies
> needed for high speed data communications, and the fact that overhead
> power wires are an excellent antennae (both for receiving
> interference and transmitting these high frequency signals) which
> make the whole idea impossible, as far as I can see.
>
> I would love to be proven wrong on this, but since all I have heard
> is marketing guff, I still think that for data rates much beyond a
> few tens of thousands of bits per second - to be shared
> presumably by hundreds of homes - power lines are not a practical
> means of transferring data. This includes the data rates required
> for telephony.
You might have to read the info very carefully (as for all marketing
info).
The original posting from "Bill D'Arcy" <billg@netinfo.com.au> said:
> Having "fixed the fuzz" of electrical interference on power lines, the
> companies said they could shunt data -- and possibly voice -- over power
> lines into the home at up to one megabit per second.
Maybe we are only talking about into the home, not the whole way from
the
home to the power station. As there is also talk about fibre, maybe
the plan is to have fibre to nodes on the final three phase 415/240v
transformer and mains cable into the home.
Just guessing.
--
Regards
brd
+-------------------------+
|Bernard Robertson-Dunn |
|Canberra Australia |
|brd@netinfo.com.au |
+-------------------------+