Technical data

Appendix
16
Appendix
Troubleshooting
If you have difficulties on your phone’s operation, the suggestions below
should solve the problems:
Problem Possible cause Solution/recommendation
No display, no dial tone Connector cable not making
contact.
Check all cables and plug
connections.
Display too light or too dark. Contrast not set correctly. Adjust the contrast.
No incoming calls being
indicated in the telephone
system.
No call signal connected. Check the programming of
the telecommunication
system.
Buzzing or other interference
in the loudspeaker or
receiver.
Interference from cordless
telephone, cordless headset,
monitor, etc.
Change the location.
The clock shows the wrong
year but date and time are
right.
The date and time are sent by
the telephone network. The
year is not sent.
Set the year manually.
The time and date are
incorrect after a call.
The time and date are not
being sent correctly by your
telecommunication system.
Adjust the clock in your
telephone system.
The LED light is
permanently on.
Incorrect MWI switch
setting.
Move the MWI switch to
SR.
Incorrect or no connection
when dialling from telephone
systems.
The outside line prefix for
the public telephone network
has not been entered.
Enter the outside line prefix.
No caller ID with incoming
call.
Your network provider or
telecommunication system
does not support this
function or the function is
not enabled.
The caller has suppressed the
sending of the call number or
is ex-directory.
The call is from a telephone
network that does not
support the sending of call
numbers.
Ask your network provider
or telecommunication system
manufacturer if the function
is available or if it needs to
be enabled.