Aastra DT4x2 for MX-ONE User Guide EN User Manual Page 128

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  • TROUBLESHOOTING
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Troubleshooting
DT412/DT422/DT432128
Keys locked
Unlock
The key pad is
locked.
Press Menu key
followed by
*.
No System
Cannot connect to
the network, the
phone is not
registered or out of
range.
Contact system
administrator.
Fault / Display Probable cause Action or
comment
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