User guide

Important User Information
DT412/DT422/DT4326
Important User Information
Safety instructions
Save these instructions.
Read these safety instructions before use!
Recommendations
Always keep and handle your products with care
and keep them in a clean and dust-free place.
Proper use and care will prolong the products
life. Use a soft absorbent tissue or cloth to
remove dust, dirt or moisture.
Always ensure that the phone, battery and
charger are used and operated in the
environment for which they are designed.
Operate the phone in temperatures between
0°C to +40°C (32°F to 104°F).
Do not expose your products to
liquid, moisture, humidity, solvents,
strong sunlight, harsh environments
or extreme temperatures, never
above +60°C (+140°F), unless the
product has been specifically
designed and officially approved for such
environments.
Exposure to heat may cause
batteries to leak, overheat or
explode, resulting in fire, burns or
other injuries.
Do not put the product in the
microwave oven: This may cause damage to
either the oven or the product.
Do not attempt to disassemble or
alter any part of the phone, the
charger(s) or the battery-pack.
Disassembly or alteration may result
in electrical shock or irreversible
damage to the equipment.
Only a
qualified service personnel or an authorized
Aastra partner should conduct internal
inspections, alterations and repairs.
Do not expose your product to open flames or lit
tobacco products.
Do not drop, throw or bend your products. This
may cause malfunction or electric shock.
Do not paint your product.
Do not use your product in an area where a
potentially explosive atmosphere exists, unless
the product has been specifically designed and
officially approved for such environments.
To avoid hearing impairment, accept the call
before holding your product (or portable
handsfree device) to your ear.
Disposal of the product
Your product should not be placed in
municipal waste. Please check local
regulations for disposal of electronic
products.