Re: Glenbrook - Vandalised Phone

[David Johnson <trainman@ozemail.com.au>]

Dion Williams wrote:

> Dave Malcolm wrote:
>
> > >There was an article on tonight's ABC TV news that the phone the driver of
> > >the IP was attempting to use, had been vandalised.
> >
> > >This may sound like a dumb question, but why don't they use radios?
> >
> > Probably the insecure nature of the radio system.
>
> If you mean by insecure that it can be monitored, I can't see too many
> saboteurs being interested in a rail operations network as opposed to a
> police or emergency services one. Still it is possible. In any case
> surely the incidence and comparative ease of vandalism warrants looking
> at an alternative communications system, if only now that the current
> one has been proved vulnerable.

Insecure in that anyone with a 450MHz transceiver can make transmissions.  If a
signal box was allowed to authorise passing signals at stop over the 2-way radio,
then anyone could sit nearby and start authorising it.


--
David Johnson
trainman@ozemail.com.au
http://www.ozemail.com.au/~trainman/