Siemens NRN 67 Series Spezifikationen Seite 49

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RSSB Page 49 of 87
GSM-R user procedures (cab radio Version 2)
GSM-R GB 1A26
Salisbury Panel 1
Connected Urgent
If the number you are calling is busy, or the call fails for any reason you will hear an
appropriate tone instead of the ringing tone and the display will show the same messages
as those for the point-to-point call (section 7.3.1).
7.3.6 Railway emergency group call
In a critical situation, for example if you see an incident that causes the line to become
unsafe, you must make a railway emergency call to stop trains and contact the signaller
immediately.
The railway emergency group call is made by pressing the emergency button. Anyone
using GSM-R in the emergency group call area will receive the group call (see section
7.1.3).
You must STOP your train when making an emergency call to ensure you remain in the
group call area and are able to complete passing your message. If you continue, you may
exit the group call area and you will drop out of the call.
Remember a railway emergency group call must be treated as shown in the rule book
relating to phrases when using a radio in which only one person can be heard at a
time.
The railway emergency group call area will always include at least one signaller and
an operations controller. The signaller who controls the area concerned (Lead
Signaller) will normally be responsible for responding to the call. However, if for any
reason the correct signaller is unable to respond, then the responsibility for
responding to the railway emergency group call passes to one of the other fixed
terminal users, for example, the operations controller.
The effect of a railway emergency group call will be widespread. This is because
emergency group call areas cover large areas, for example, the smallest emergency group
call area will be that covered by three base stations, about 18 kilometres (approximately
11 miles).
Once you have pressed the red button you will not be able to cancel the call being set
up.
When the signaller answers the call, the display will
change to show the call is connected.
To make a railway emergency group call, you must
press the railway-emergency group call (red) button.
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