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Troubleshooting
BusinessPhone Cordless DT400/DT410/DT420/DT43094
Troubleshooting
This section contains information on how to solve common
operational problems, and warnings you may receive.
Go through the following lists if you encounter any problems. If this
checklist does not solve the problem, contact your system
administrator. If others have similar problems, there may be a
system error.
Fault / Display Probable cause Action or
comment
The telephone
does not switch on
The battery is low. Charge the battery.
No display The battery is low
or the telephone is
defective.
Charge the battery
or contact system
administrator.
No ringing The Ringer off icon
is on or the
telephone is
defective.
Off icon on =
Turn on the ringing
signal.
Battery icon flashes The battery is low
or the telephone is
defective.
Charge the battery.
Call icon is
switched off after
2seconds
The battery is low
or the telephone is
defective.
Charge the battery
or contact system
administrator.
Lamp shows
steady light
The telephone is
defective.
Contact system
administrator.
Wrong
SIM card
The SIM card is not
compatible with the
software version of
the telephone.
Contact system
administrator.
SIM
missing
The SIM card is
missing.
Insert the SIM card
or contact system
administrator.
94


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