Ericsson DT412 User Manual page 128

Troubleshooting
128
Fault / Display
Keys locked
Unlock
No System
Probable cause
The key pad is
locked.
Cannot connect to
the network, the
phone is not
registered or out of
range.
Action or
comment
*
Press Menu key
followed by .
Contact system
administrator.
DT412/DT422/DT432