• Plug the power cord firmly into an AC outlet. Otherwise, it can cause fire or electric shock.CAUTIONFor All Telephone Equipment• The product should be kept free of dust, moisture, high temperature (more than 40 ℃), and vibration, andshould not be exposed to direct sunlight.• Unplug the product from the wall outlet before cleaning. Wipe the product with a soft cloth. Do not cleanwith abrasive powders or with chemical agents such as benzine or thinner. Do not use liquid cleaners oraerosol cleaners.For the Control Box• The power supply cord is used as the main disconnect device. Ensure that the AC outlet is located nearthe equipment and is easily accessible.• Slots and openings in the front, back and bottom of the cabinet are provided for ventilation; to protect itfrom overheating, these openings must not be blocked or covered. The openings should never beblocked by placing the product on a bed, sofa, rug, or other similar surface while in use. The productshould never be placed near or over a radiator or other heat source. This product should not be placed ina sealed environment unless proper ventilation is provided.• When this product is no longer in use, make sure to detach it from the rack.• To protect this unit from static electricity, do not touch any external connectors of the unit.NoticeFor All Telephone Equipment• Read and understand all instructions.For the Control Box• Keep the unit away from heating appliances and devices that generate electrical noise such asfluorescent lamps, motors and televisions. These noise sources can interfere with the performance ofthe unit.NoteFor All Telephone Equipment• Never attempt to insert wires, pins, etc. into the vents or holes of the product.1.1.2 Important Safety InstructionsWhen using your telephone equipment, basic safety precautions should always be followed to reduce therisk of fire, electric shock and injury to persons, including the following:• Do not use the product near water, for example, near a bathtub, wash bowl, kitchen sink, or laundry tub,in a wet basement, or near a swimming pool.1.1.2 Important Safety Instructions10 Operating Manual