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GSM-R user procedures (cab radio Version 2)

GSM-R GB

Searching networks

Please wait

If the cab radio does not find coverage at all refer to section 9.2.6.

Once the cab radio has found the network it is ready to use (in other words it can make

and receive calls). However, if the display unit is in the cab from where the train will be

driven, you must register the cab radio with the GSM-R network (see section 6.2).

While the cab radio is unregistered, although it can make and receive calls (including

emergency and urgent calls), the signaller will not receive the TRN or additional location

information provided by signalling-system based call routing. In addition, the signaller will

not be able to call you using the TRN and will have to find your train’s stock number from

other systems.

If using the cab radio while it is unregistered you must not use the call signaller or

standing at signal buttons, as the call or message might not be connected to the right

signaller.

An unregistered train is also able to send a DSD alarm message to the signaller so it is

important that (if you are the driver) you register the train to make sure that the message

accurately identifies your train identity and location and is sent to the signaller controlling

the movement of your train.

In certain circumstances it may be necessary to use the cab radio without inserting a

driver’s key.

Provided the driver’s key is out, you can switch on a cab radio by pressing the button

for at least two seconds. However, if the cab radio is not used for a period of 30 minutes it

will automatically switch off.

 If the train is only fitted with a single train radio, but has two associated cab radio

display units, for example, a locomotive, then calls can only be made from one cab

radio display unit at a time.

6.1.3 If the cab radio is already registered when switched on

If the cab radio registration was retained by the previous driver when leaving the cab, then

the registered TRN will be displayed in the top right corner of the radio’s display. If this is

the correct train TRN for your journey then the cab radio is already correctly registered. If

Once switched on the GB GSM-R network

name will be displayed (“GSM-R GB”),

showing that the cab radio has connected to the

GSM-R network.

If the cab radio does not find network coverage,

for example, due to a local network problem or

in an area not yet operating with GSM-R, the

display will show ‘Searching networks, Please

wait’.

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Siemens NRN 67 Series Spezifikationen Seite 30