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GSM-R user procedures (cab radio Version 2)

 If it is not possible to register the cab radio then you may need to revert to an

alternative secure method of communication for the passing or receiving of

operational instructions, as shown in the rule book.

 If it is not possible to register the cab radio then there is a risk of voice calls and

operational text messages being routed to the wrong signaller. Always check the cab

radio display to be sure you are connected to the correct signaller and confirm the

identity of the person you are speaking to once communication is established.

To register the cab radio, you will need two pieces of information that make up the

registration code. These are:

 a four-digit train reporting number (headcode) and

 the identity of the signal at which the train is standing (the location code).

 Note at some locations an alias plate will provide the required location code (see 4.3)

or wildcard location code (99x).

Once you have this information, you can register the cab radio.

6.2.1 Train reporting number (Headcode)

The TRN, is provided by your company, normally printed on your ‘driver’s diagram’ (or

equivalent).

6.2.2 Location Code

Because TRNs are not unique nationally, and the GSM-R network is a national

communications system, it is necessary for the network to be able to differentiate between

trains during the registration process, so as to prevent registration failures due to duplicate

TRNs. This is achieved by entering information relating to the location from which you are

attempting to register, thus making the registration code an almost unique 7-digit number.

Before trying to register a cab radio, you will need the last three digits of the signal at

which your train is standing (the train must be stationary for this to work). If the signal has

fewer than three digits, you will need to add a zero at the beginning.

In certain places alias plates will be installed for registration

purposes (see Figure 6).

There will also be instances where you will have to enter a wild card number for the

location code of the format 99X, where ‘X’ depends on where you are or the route you will

be taking after registering. This is covered in more detail in section 6.2.4.

 Before you can successfully register using a normal location code in a signal assisted

call routing area, the TRN must have been entered into the relevant signal berth on

the train describer and the train must be standing in that signal berth when you

be returned.

Where two or more trains are sharing a platform or siding the driver of the second train to

depart must not register the cab radio using the signal number until the first train has

departed and the signal has returned to danger.

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Siemens NRN 67 Series Especificaciones Pagina 33