Panasonic Digital Super Hybrid System Reference Manual page 12

If there is any trouble, unplug the extension line and connect
a known working phone. If the known working phone
operates properly, have the defective phone repaired by one
of the specified Panasonic Factory Service Centres. If the
known working phone does not operate properly, check the
Digital Super Hybrid System and the Internal extension
wiring.
Keep the unit away from heating appliances and electrical
noise generating devices such as fluorescent lamps and
motors.
The unit should be kept free of dust, moisture and vibration,
and should not be exposed to direct sunlight.
Panasonic Business Systems U.K.
Panasonic House, Willoughby Road, Bracknell,
Berkshire RG12 4FP
Printed in UK
E&OE
KX-TD1232E/SLT
Others
Do not use benzene, thinner, or the like, or any abrasive
powder to clean the cabinet. Wipe it with a
soft cloth.
WARNING:
TO PREVENT THE RISK OF FIRE OR ELECTRIC
SHOCK, DO NOT EXPOSE THIS PRODUCT TO RAIN
OR ANY TYPE OF MOISTURE.
12 Issue 1