Am I being told to stop immediately or make an emergency stop ? There is a difference from my perspective.
In this case, an emergency stop. (Obviously, not all Urgent calls will be for emergency purposes and the vast majority won't be).
Urgent call + signaller notifying you of emergency + instruction to stop immediately = individual emergency stop. According to our briefings.
Even the documentation I posted states to only respond to the urgent call if safe to do so.
In an emergency, we don't have to wait for you to respond. As soon as the call connects, we can start issuing the instruction to stop. The only verbal response required from you is to confirm that you are stopping.
Our briefing is that if you guys want us to stop in an emergency then REC. Why would you make a voice call to stop us in an emergency ? You no longer need to. That's how the old CSR way worked.
We're being briefed slightly differently, then - which is slightly concerning (if not surprising :roll

.
Re CSR, you must be remembering a different system to me. In an emergency, we would use one of two emergency stop text message functions (see
6.2 and 6.3). Quick, easy and no verbal instructions required. Yes, it was possible to make an emergency general call, but I've never heard of a signaller doing so in preference to the text message options (if used at all, it tended to be for broadcasting information following a general stop text message). Why would you?
The lack of a comparable individual emergency stop text message function on GSM-R is a glaring omission, IMO. I'd be fascinated to hear why the Strathclyde Trial deemed it unnecessary.
What that appears to me is that an operational decision is being made over one of absolute safety. We have the same trouble. Drivers are afraid to hit the big red glowy thing because of the disruption it causes. In an emergency, the emergency system is not being used. Doesn't that defeat the object of having a simple solution to stop everything ? The big red button takes the decision out our hands. See an emergency, stop everything.
It's more nuanced than that. Our grade hasn't received any criticism for using RECs so we're not afraid to employ them in the way that some drivers - sadly - might be. Neither are we worried about causing delays - it's a given following an emergency, and TDA just lump all the minutes into the incident TIN. But there may be safety concerns regarding other trains: if it's a baking hot day, do I want several crowded main line trains potentially marooned in a red zone area with no air con for an hour, when the emergency only directly affects a branch line service on a different route, several miles away?
As for the emergency system not being used, I can only repeat: we have been briefed that an Urgent call plus appropriate verbal instruction has the status of an individual emergency stop. For us, the distinction isn't 'emergency or non-emergency call'; but 'what type of emergency call'?.
The link I provided also states we need to acknowledge the the emergency stop using the ST button
I had no idea that you are required to do this following a REC. As 68000 says, we don't receive them!
There was an incident where the Driver made an REC in this situation. The call is public broadcast so had obvious implications. It was decided that the REC should be terminated and then the Driver spoken to individually. There is a document setting out that procedure somewhere. It's the same situation with your branch line example too. Does the Driver need to stop all trains or does he make the urgent call and ask for lines blocked, current isolation* etc ?
Interestingly, this
is something that has filtered through to us - or at least to my place. Our Boss has asked us to deal with sensitive inbound RECs in exactly this way: by closing down the REC and speaking to the affected driver individually. We have also had to take this approach on a couple of occasions when an inbound REC hasn't worked properly (ie we can speak to all drivers in the area
except for the one who actually initiated the call).
But there is a clear difference between a REC which then transitions to an Urgent call, and using Urgent right from the beginning. IMO for a Person Hit By Train on a double track, electrified main line, there is no debate whatsoever - the driver should be hitting the red button. In my case, another running line was affected and
some other trains were involved; using Urgent merely resulted in wasted time while we dealt with the various other parties who should already have known what was going on. Luckily I had a shift manager and colleagues to chip in, but at a single-manned box the unnecessary increase in workload could be a major pain.