Siemens NRN 67 Series Spezifikationen Seite 72

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GSM-R user procedures (cab radio Version 2)
The radio will attempt to de-register the stuck registration when the drivers control
panel is re-activated.
9.4 Temporary loss of coverage
Searching networks
1A26
Please wait
9.4.1 No Network message
No network
1A26
If the train is in transit and it comes onto a cell which is allowed it will normally
automatically rejoin the last network it was on. If it is unable to establish the last network it
was on for some reason (eg corruption above) then the user may have to manually
reselect the network through the menu.
However, if the radio is on an "allowed" cell (display showing GSM-R GB) and then
reselects to an "unallowed" cell, it gets response from the network to say it [the radio] is
not allowed to connect to the network then in this scenario it will display "searching
networks please wait" (See section 9.4) until it reselects to an "allowed" cell where it will
show the network name again,
9.5 Loss of signalling-system based call routing
The cab radio will not be aware of network problems that affect signalling-system based
call routing. However, if the fault has been reported to the signaller you should receive a
broadcast call from the signaller alerting you to the fault when entering the failure area.
If you receive a broadcast (or other communication) informing you of such a failure you
should treat the area as a ‘dial-up’ area (as described in section 2.5) and only contact the
Although the GSM-R system provides full
coverage of the rail network, there may be times
when there is a temporary break in coverage, for
example a base station fault. There will be a
warning tone sounded through the loudspeaker
and a message ‘searching networks please wait’
on the display.
If there is a break in coverage you should report it
to the signaller at the next appropriate opportunity
(in other words, when it is safe to do so), unless
you have previously been advised of the coverage
loss.
This message only appears in version 2 software
when the radio attempts to connect to the network
and either:
Receives a corrupted or un-intelligible
message or
Receives no response at all.
Is denied access.
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