Bedienungsanleitung Panasonic KX-UDT121 (Seite 11 von 66) (Englisch)

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and installers using this technology for calls to or

from the PSTN refer to ITU E Model requirements

in the design of their networks. The overall aim is to

minimise delay, distortion and other transmission

impairments, particularly for those calls involving

cellular and international networks, which already

suffer extensive delay.

Echo cancellation

• Echo cancellers are not normally required in the

Telecom PSTN because geographic delays are

acceptable where CPE return loss is maintained

within Telepermit limits. However, those private

networks making use of Voice over IP technology

are required to provide echo cancellation for all

voice calls. The combined effect of audio / VoIP

conversion delay and IP routing delay can cause

the echo cancellation time of ³ 64 mS to be

required.

PTC200 6.11.1 (3) All Customer Equipment (fail

safe requirements)

• Under power failure conditions this appliance may

not operate. Please ensure that a separate

telephone, not dependent on local power, is

available for emergency use.

For users in Singapore only

For Users in Hong Kong only

For Best Performance

Operating Range

• The range of operation depends on the topography

of your office, weather, or usage conditions,

because signals are transmitted between the CS

and the handset by radio waves.

• Normally, you get greater range outdoors than

indoors. If there are obstacles such as walls, noise

may interfere with your telephone calls. In

particular, high metal shelves or reinforced concrete

walls will restrict your operating range.

• A handset may not work when it is too far from the

CS depending on the structure of the building.

• We strongly suggest you hold the bottom half of the

handset to ensure better call quality. Because, the

antenna is located in the upper half of the handset.

Noise

Occasional noise or interference may occur due to

electromagnetic radiation from objects such as

refrigerators, microwave ovens, faxes, TVs, radios, or

personal computers. If noise disturbs your telephone

calls, keep the handset away from these electrical

appliances.

Environment

• Keep the product away from heating appliances

and devices that generate electrical noise, such as

fluorescent lamps and motors. These noise sources

can interfere with performance of the product.

• Do not place the product in rooms where the

temperature is less than 0 °C or greater than

40 °C.

• To avoid damage, charge the battery only in

temperatures ranging from 5 °C to 40 °C.

• Allow 10 cm clearance around the product for

proper ventilation.

• Avoid environments with excessive smoke, dust,

moisture, mechanical vibration, shock, or direct

sunlight.

• The apparatus is designed to be installed and

operated under controlled conditions of ambient

temperature and a relative humidity.

Routine Care

• Unplug the charger from the AC outlet before

cleaning.

• Wipe the product with a soft cloth.

• Do not clean the product with abrasive powder or

with chemical agents such as benzine or thinner.

• Do not use liquid cleaners or aerosol cleaners.

• Clean the terminal of the charger periodically.

Document Version 2012-11 Operating Instructions 11

Important Information

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