Unify OpenScape 4000, User Manual

Page: 248 / 256

Fixing problems 245
Fixing problems
Caring for your telephone
• Never allow the telephone to come into contact with coloring, oily or aggressive agents.
• Always use a damp or antistatic cloth to clean the telephone. Never use a dry cloth.
• If the telephone is very dirty, clean it with a diluted neutral cleaner containing surfactants, such
as a dish detergent. Afterwards remove all traces of the cleaner with a damp cloth (using water
only).
• Never use cleaners containing alcohol, cleaners that corrode plastic or abrasive powders!
Troubleshooting
Pressed key does not respond:
If the phone is locked, selected dialing keys on the OpenScape Key Module 600 cannot be used.
This also applies even if an emergency number is saved on this key. Check whether your tele-
phone is locked (The following message appears on the screen: "Phone locked. To unlock enter
the PIN."). If the phone is locked, enter your PIN to unlock it.
The phone does not ring on call:
Check whether the ringer is deactivated (see icon in the status bar on the display

page 27). If it
is deactivated, activate the ringer.
You cannot dial a number:
Check whether your telephone is locked (The following message appears on the screen: "Phone
locked. To unlock enter the PIN."). If the phone is locked, enter your PIN to unlock it.