
RSSB Page 82 of 87
GSM-R user procedures (cab radio Version 2)
9.10 Cab radio error messages
Whilst using the GSM-R cab radio you may encounter certain failure or error messages. Table 4 explains the meaning of these messages and,
identifies possible causes and potential solutions.
The back-up battery is being
charged following discharge through
use.
The battery back-up was used and has
become discharged.
The back-up battery will charge when
power is again available, no action is
required by the driver. Press Text
button at the end of the journey to
check the battery is ok.
A dialled phone number is busy with
another call.
The phone number dialled is busy.
Or (if in a group call), it shows that
another person in a group call is
speaking.
The PTT button has been activated in a
group call when another driver is
speaking.
Keep trying (releasing and
reactivating the PTT) until you can
speak. Wait for the speaking driver to
finish by saying “Out”.
An attempt to deactivate ‘Divert All
Calls has failed.
There are a number of possible causes
mainly relating to communication
between the cab radio and the GSM-R
network.
An attempt to send a DSD alarm
message has failed.
The DSD message failed to reach the
person it was meant to.
Not necessary as the message is a
reminder.
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