AASTRA 4223 Manual Do Utilizador

Troubleshooting

132

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.

Press (see display).
If 

 is not shown, press 

 until it appears.

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.

(However the text is not visible when the display has turned black, 

the exit feature is still on that Menu key).