May or may not relate to the cause of the failure but the DTRS gear is all
due for replacement in the next few years as part of its normal lifecycle
replacement schedule.
On Tuesday, 14 March 2023 at 17:01:52 UTC+11 Hunslet wrote:
> Doubtless not the same today, but 50 years ago (!), the Department of
> Railways etc was a self-insurer. Didn’t even use the Government
> Insurance Office!
>
> Hunslet
>
>
>
> *From:*tramsdo...@... [mailto:tramsdo...@googlegroups.com] *On
> Behalf Of *Stuart Keenan
> *Sent:* Tuesday, 14 March 2023 4:52 PM
> *To:*tramsdo...@...
> *Subject:* Re: [TramsDownUnder] Follow up on the DTRS failure last week
>
>
>
> Just wondering if it has something to do with their public liability or
> other insurance?
>
>
>
> I imagine that Sydney Trains would have negotiated a reduced premium with
> their insurer once the DTRS was operational as it represents an extra layer
> of safety. I can also imagine the insurer saying something like "Yep, no
> worries we'll lower your premium but you gotta have this radio on 24/7. If
> it stops, so do your trains".
>
>
>
> Anyone know?
>
>
>
> On Tue, Mar 14, 2023, 16:39 Matthew Geier mat...@...>
> wrote:
>
> On 14/3/23 15:30, 'bblun...@yahoo.com' via TramsDownUnder wrote:
>
> I'm not conversant with the system or the failure, but if the problem is
> in the trains' equipment, how does a hand-held radio help? Most crews
> already have hand-held units for voice communications, which I imagine
> would be separate from the train control system.
>
>
>
> The problem appeared to have been network wide, it is hard to believe that
> a couple of hundred trains could fail simultaneously?
>
>
>
> The DTRS terminals in the trains were all OK, they lost the central
> management system due to a networking fault. And for some reason the
> fail-over system failed to fail-over.
>
> Presumably the branch lines that kept operating, the local SM made
> arrangements with the train drivers to use mobile phones. I think guards
> actually have a Sydney Trains issued mobile phones.
>
> As the DTRS is basically a mobile phone network (if you tell your mobile
> phone to scan for carriers and you are near the railway you will see an
> extra network), they could have 'failed over' to a carrier network when
> they couldn't login to Railcorp network. Control wouldn't be able call to
> trains, but they should have been able to 'roam' to Telstra/Optus and make
> outgoing calls in an emergency.
>
>
>
> Seems crews are so micromanaged now that the idea of operating with out a
> 'call all trains' and 'halt all trains' option is unthinkable.
>
>
>
>
>
>
>
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