4 Important NotesSoftware updateDuring a software update, the phone must not be disconnected from the power supply unit and/orthe LAN. An update action is indicated by messages on the display and/or by flashing LEDs.Care and cleaning instructions• Never spray the phone with liquids as the penetrating fluids may lead to malfunctions or damagethe device.• Do not use substances such as alcohol, chemicals, solvents, or scouring agents, as these sub-stances may lead to surface damage.Clean the phone with a soft and slightly damp cloth.Online documentationThis document along with additional information is available online at: http://www.unify.com/ Support.Technical notes, current information about firmware updates, frequently asked questions, and lotsmore can be found on the Internet at: http://wiki.unify.com/.License informationMore information about the EULA and Open Source licenses you can find on the Web interfacesection ”Licenses” page 155.Installation location information• The telephone may be operated only using the LAN cabling inside a building. The device shouldbe connected to the IP infrastructure using a shielded LAN cable: Cat-5 for 100 Mb/s or Cat-6for 1000 Mb/s. In the building installation, make sure that the shield of this cable is earthed.• The telephone is designed for operation in a protected environment within a temperature rangeof 5 °C to 40 °C.• Do not install the telephone in a room where large quantities of dust accumulate; this can con-siderably reduce the service life of the telephone.• Do not expose the telephone to direct sunlight or any other source of heat. This is liable to da-mage the electronic components and the casing.• Do not install the telephone in bathrooms or shower rooms.
