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GSM-R user procedures (cab radio Version 2)

The person with ‘Lead Responsibility’ will be responsible for re-establishing

communication, for example, in the case of a communication involving a signaller and

driver, the signaller would be responsible for re-establishing the communication.

If you are not the person with ‘Lead Responsibility’, then you must wait to be contacted by

the person with ‘Lead Responsibility’.

2.7 Call waiting and call hold

If someone using a cab radio is already involved in a call of an equal or higher priority,

they will be alerted to the incoming call and may:

 ignore the incoming call and continue with the call (the incoming call will be rejected

after a set time, or the caller will hang up).

 end the ongoing call which will automatically connect the incoming call. or

 place the ongoing call on hold (telling the other party that they will be put on hold) and

accept the incoming call. Once the second call is answered the user may swap

between both calls. A call will remain on hold until the second call has been ended, at

which point the call on hold will be automatically re-connected (it is important that the

driver announces to the other party that the call is being re-continued).

2.8 Identifying who is making the call or who is being called

The identity of the caller and the called party will be shown on the cab radio display. The

form that this takes depends on the information that is available to the cab radio at the

time. For example, if an outgoing call is made by pressing the call signaller button, the cab

radio will look up the number of the signaller that the call is routed to (from the Network

Rail phone book) and display the listed signaller’s name (for example, Glasgow Panel 1).

 The identity of the called party will be displayed once the call is connected and either

a corresponding entry is stored within the cab radio’s phonebook or the fixed terminal

sends its identity to the cab radio.

Similar information is shown on the fixed terminal in the form of a train’s TRN (assuming

the cab radio has been registered) or the stock number of the traction unit (if it has not

been registered). The train’s last reported position stored within the signalling system is

also shown or, if this is not available, the name of the cell area is shown.

2.9 Call divert

Call divert provides the option of forwarding incoming calls to another number. However,

this function must not be used as there is currently no operational requirement for it.

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Siemens NRN 67 Series Especificaciones Pagina 16