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5603 Wireless Handset User Guide
5
Tips for your Comfort and Safety
Don't cradle the handset!
Prolonged use of the handset can lead to neck, shoulder, or back discomfort, especially if you
cradle the handset between your ear and shoulder. If you use your phone a lot, you may find
it more comfortable to use a headset. See the section on headset usage elsewhere in this guide
for more information.
Protect your hearing
Your phone has a control for adjusting the volume of the handset receiver or headset. Because
continuous exposure to loud sounds can contribute to hearing loss, keep the volume at a
moderate level.
Frequency Range
The handset is a radio transmitter and receiver. When it is on, it receives and sends out radio
frequency (RF) energy. The handset operates on different frequency ranges depending on
market and employs commonly used modulation techniques:
•EU: 1880 - 1900 MHz
•USA: 1920 - 1930 MHz
•LA: 1910 - 1930 MHz
Exposure to Radio Frequency Signals
This device complies with FCC SAR limit of 1.6 W/kg. The maximum SAR value measured
when used at the ear is 0.067 W/kg. The telephone has also been tested when worn on the
body using belt clip, maximum measured SAR value in this configuration is 0.04 W/kg.
Environmental Requirements
• Only use the handset in temperatures between 0C to +40C (32F to 140F).
• Avoid exposing the handset for direct sunlight or close to other heat sources.
• Keep the handset away from excessive heat and moisture.
• Do not expose the handset to open flame.
• Keep the handset away from strong electromagnetic fields.
Chemical Resistance
The alpha and numeric characters printed on the exterior of the handset have been tested and
found resistant to chipping, fading or wearing off when the handset is treated with common
cleaners and disinfectants or perspiration. The following chemicals have shown no harmful
effect:
• 3% Hydrochloric Acid