131Dialog 4223 Professional/Dialog 4225 Vision
Troubleshooting
Dialog 4225 Vision:
Å Select PhoneSet in the top menu (see display).
Down or Up Press to frame Local Test Mode (see display).
Select Press (see display).
The display shows the firmware revision state and
Selftest OK
for a few seconds. If there is something wrong, a fault message
appears. Inform your system administrator about the fault
message.
All the key lamps on the phone and connected extra key panels
should be switched on during the selftest to indicate that each key
lamp is OK.
After a few seconds the display is checked (the display is
completely dark). The display is OK when there are no light dot(s) or
line(s). The light frame around the display is supposed to be there.
Exit Press the most left display menu key to exit (see display).
(However the text is not visible when the display has turned black,
the exit feature is still on that menu key).
Note: If you do not press
Exit, the selftest is automatically
finished after about 30 seconds.
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