Fixing Problems
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Fixing Problems
Telephone Maintenance
• 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 con-
taining 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.
Echo Effect
Echoes can occur - sometimes quite distinctly - in the course of a tele-
phone call. This effect is not caused by a product or design fault in your
telephone but rather by the other party's telephone.
Troubleshooting
Pressed key does not respond:
Check whether the key is stuck.
Telephone does not ring:
Check whether the do not disturb function was activated on your tele-
phone ("Do not disturb" appears on the screen). If so, deactivate it
Æ Page 27.
You cannot dial an external number:
Check whether you telephone is locked (US: "Not authorized" UK: "Access
denied" appears on the screen). If so, unlock the telephone Æ Page 64.
No LDAP or WAP functionality, lamps (key LEDs) do not shine or the
external keyboard has no function:
Check whether the plug-in power supply unit is plugged in (except connec-
tion by HFA with "power over LAN").
To correct any other problem:
First contact service personnel. If service personnel is unable to correct
the problem, contact Customer Service.
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