Installation Manual Part 7

FCC ill: CDG-ARTU EXHIBIT C
MAGNASTAR C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
The temporary service disruption handset text message is generated by the handset itself and does
not originate from the ARTU as do all other handset messages. This message is generated by the
handset if power and ground are present but the handset is missing the clock, sync or data. The
message may also appear if the data to the handset is corrupted. If this message appears, check to
verify that the ARTU has not detected a fault condition or is running power-up BIT. This can be
done by viewing the fault (red) light on the front of the ARTU. If the ARTU fault light is
illuminated then a fault has been detected or is running power-up BIT. Power-up BIT should not
take longer than five minutes to complete. If after enough time has passed to allow power-up BIT
to complete, then the handset text message would be displayed because of a fault with the ARTU.
If the temporary service disruption handset text message is present and the ARTU fault light is not
present, then check the handset and CDBR cabling in the aircraft..
TEMPORARY
SERVICE
DISRUPTION
RevS
9-35