Dialog 4223 Professional - Manual (Page 105)

105 Dialog 4223 Professional
Troubleshooting
Troubleshooting
If your phone is out of order, you can initiate a telephone selftest to
check whether there is a fault in the phone or in the system. You
can also check the firmware revision state of your phone.
To initiate a telephone selftest í *4
Press and hold simultaneously until a ring signal is heard.
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 panel)
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. #
Press to exit.
Note: If you do not press
#
, the selftest is automatically
finished after about 30 seconds.