AASTRA DT390 for BusinessPhone User Guide EN - Manual (Page 100)

1424-EN/LZT 103 091 Uen D 2010-02-12 100
T ROUBLESHOOTING
18 Troubleshooting
This chapter contains information on how to solve common operational
problems, see table 5 on page 100, and warnings, see table 6 on page
100, you may receive. Go through the following lists if you encounter any
problems. If the checklists do not solve the problem, contact the system
administrator. If others have similar problems, there may be a system
error.
Table 5 Operational problems
Table 6 Error or warning messages
Fault Probable cause Action or comment
No display The battery level is
low or the phone is
defective. Charge the battery.
No ringing
The mute icon is
shown in the display,
or ringer volume set
to silent, or the phone
is defective.
Make a long press on
, or increase
volume.
Signal strength icon
off Out of system
coverage area or the
phone is defective. Enter coverage area.
Call is switched off
after 2 seconds The phone is
defective. Contact the system
administrator.
Display shows Probable cause Action or comment
Enter PIN
The phone’s lock is
activated. Enter the required
PIN code. If you have
lost the PIN code,
configure a new or do
a factory reset in
WinPDM.
No access
The network is in
range, but no access
rights. Switch off the phone
and then switch it on
again.