Yeah, they just leave trainloads of passengers (sorry - “customers”, “clients”, whatever) stranded in the dark without any information about what’s happening - much better, eh?
Tony
> On 9 Mar 2023, at 09:53, TP historyworks@...> wrote:
>
> I wonder how the metro gets by without the controllers talking to the drivers. Oh wait.
>
> Tony P
>
> On Thursday, 9 March 2023 at 09:42:03 UTC+11peterm...@... http://gmail.com/ wrote:
> COntroller duplication, update one and leave the standby on the previous software version and fail over to the older version.
>
>
> On Thursday, 9 March 2023 at 09:01:12 UTC+11 Matthew Geier wrote:
> On Wed, 8 Mar 2023 at 17:39, Tony Galloway a...@... <>> wrote:
> Wasn’t that long ago there was no 2-way radio, digital or otherwise, and trains ran just fine.
>
> Now everything stops without it - what a joke.
>
> Must be that wonderful ever onwards “march of progress” that makes everything work so much better.
>
> Someone (a group of managers more like it) has written the operation of the train radio system into the SMS and made it a 'vital' system so if that system is not operational, they are not meeting all requirements for 'safe operation'.
> Never mind the railways ran for 100 years without radios and fancy digital trunked comms systems.
>
> Seems the concept of a driver looking out the front window and observing the status of the signal lamps beside the track is no longer considered 'safe'.
> There was no suggestion that interlockings had failed, or the actual train control systems were down, what they lost was the network-wide GSM-R-based train radio system. They couldn't talk between operations control and trains in the field.
>
> I observed the Cronulla branch being operated as a shuttle during the outage, showing some initiative on the part of Sutherland station master to take local control of the Cronulla branch. I've seen reports that Blacktown did the same for the Richmond branch.
> I just hope the relevant staff now don't get reprimanded for 'unsafe operations' for showing some initiative to keep things running. Not all station staff are safe working qualified anymore - I do wonder how they will formally withdraw the qualifications from SMs that still hold safe working qualifications, preventing any further local control initiative taking on their part again.
>
> They did a software update of the train radio controllers on the weekend. I suspect that update wasn't tested under a full load of a busy system - or tested long enough - the new software having a 'slow leak', so that it only works for a few days - then falls over.
> Vital systems should have redundant controllers with the software of each written by different teams so that the two don't have the same bugs. But that's expensive - doing all your R&D twice.
>
>
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