[LINK] Battery back-up mandatory for NBN?
rchirgwin at ozemail.com.au
Mon Oct 25 12:34:34 EST 2010
On 25/10/10 12:15 PM, Jan Whitaker wrote:
> At 11:38 AM 25/10/2010, Richard Chirgwin wrote:
>> The answer is, "both". Everyone's forgetting that Tasmania is a pilot.
>> The documentation for the pilot sites should be read in that context: we
>> do not know if all of the procedures for NBN Tasmania will be adopted
>> nationally. That's the reason for a pilot - the outcomes of the pilot
>> provide input to the rest of the rollout.
> I think there may be a bit of 'blind man and the elephant' going on
> here. There are a few issues that need to be unpacked: system
> batteries and local premises. I don't know the engineering design to
> get a picture of either.
> What we do know is current copper services provide power the end
> equipment on the analog system so if your street power goes off, you
> still have a phone. But new end user equipment would not??
> If a mobile phone battery goes dead, it needs a replacement, but if
> the tower to which it is connecting dies, there is still no service.
OK, the ten second primer.
Your phone is powered by 48V dc from the exchange, supplied over the
copper. In larger exchanges, Telstra backs this up with both batteries
and diesel generators; in small exchanges, it's batteries only. If you
have a PSTN phone - not a cordless! - this is directly powered from the
The NBN network termination unit is not exchange powered: it's powered
from your home mains. If you want backup, you need a battery. It's
Back at the exchange end, backup will fall on NBN Co's shoulders - after
all, the exchange belongs to NBN Co.
So it's not that tough an issue; and if people want the battery backup
to be mandatory and NBN Co's responsibility, then they're quite free to
put that view to the USO inquiry.
> Melbourne, Victoria, Australia
> jwhit at janwhitaker.com
> blog: http://janwhitaker.com/jansblog/
> business: http://www.janwhitaker.com
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