Troubleshooting - Ericsson Dialog 4223 Professional User Manual

Troubleshooting

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Troubleshooting
If your phone is out of order, you can initiate a telephone self-test to
check whether there is a fault in the phone or in the system. You
can also separately check the firmware revision state of your
phone.
To initiate a telephone self-test
Dialog 4223 Professional:
Press (see display).
If
PhoneSet
Press (see display).
Up
Press to frame
Press (see display).
The display shows the firmware revision state and
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 self-test 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 should be there.
Press the left most 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
automatically finished after about 30 seconds.
is not shown, press
more...
Local Test Mode
Dialog 4223 Professional/Dialog 4225 Vision
until it appears.
(see display).
Selftest OK
, the self-test is
Exit