31Useful InformationTake special care to follow the safety suggestions listed below.InstallationsEnvironment1) Do not use this unit near water—for example, near a bath tub,washbowl, sink, etc. Damp basements should also be avoided.2) The unit should be kept away from heat sources such as radiators,kitchen range, etc. It also should not be placed in rooms where thetemperature is less than 5°C or greater than 40°C.Placement1) Do not place heavy objects on top of this unit.2) Care should be taken so that objects do not fall onto, and liquids are notspilled into, the unit. Do not subject this unit to excessive smoke, dust,mechanical vibration, or shock.3) Place the unit on a flat surface.Lightning surgeThis unit has already been equipped with a built-in lightning protectioncircuit. However, we recommend that you install lightning protection on thetelephone line, if your area has a high incidence of lightning strikes.To install the above option, please contact your local sales shop.• Lightning damage is not covered in the warranty even if lightningprotection is installed.WARNING:TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THISPRODUCT TO RAIN OR ANY TYPE OF MOISTURE.If there is any trouble, disconnect the unit from the telephone line andconnect a known working phone. If the known working phone operatesproperly, do not reconnect the unit to the telephone line until the troublehas been repaired. If the known working phone does not operate properly,consult with your telephone company.Safety Instructions