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The table below groups together the answers to the most frequently asked questions concerning the RT4 audio/telephone.
The TRAFFIC INFO
On starting, it is several minutes before the system begins to receive the
along the route are not
indicated in real time.
In certain countries, only major routes (motorways, ...) are listed for the
The time taken to
The performance of the system may slow down temporarily if a CD is
calculate a route
sometimes seems
calculated.
longer than usual.
longer than usual.
Does the emergency call
No, European regulations impose the presence of a SIM card in order to
function work without a
make an emergency call.
SIM card?
My SIM card is not
The RT4 accepts 3.3 V SIM cards, the old 5 V and 1.8 V SIM cards are not
recognised.
recognised.
After changing a wheel,
The RT4 GPS audio/telephone uses the wheel rotation information to
the system loses its
location.
minutes, this recalculation may affect the quality of the locating function.
The location on the
On starting, the initialisation of the GPS may take up to 3 minutes to
map is incorrect or
receive more than 3 satellites correctly.
inaccurate.
The altitude is not
displayed.
Depending on the geographical environment (tunnel, ...) or the weather,
the conditions of reception of the GPS signal may vary.
256
RESPONSE
SOLUTION
symbols on the map).
This phenomenon is normal. The system is
Wait until the CD has been copied or stop the
copying before starting the guidance function.
Insert a valid SIM card in the slot on the RT4 GPS
audio/telephone.
Contact your telephone operator.
Wait until the system has completed its
recalculation.
Wait until the system has started up completely.
Check that there is a GPS coverage of at least
3 satellites (long press on the MENU button, then
select AUDIO/TELEPHONE DIAGNOSTICS, then
GPS COVERAGE).
This phenomenon is normal. The system is
dependent on the conditions of reception of the
GPS signal.
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