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BusinessPhone — Dialog 4223 Professional / Dialog 3213
Installation
Install key panels
1
Remove the small plastic plate, marked DSS, i.e. with a
screwdriver and connect the cable.
2
Attach key panel unit.
3
Secure with screws and install stand.
Note:
All key panels must be of type DBY 419 01 (three or
four key panels can only be used in newer versions of the
exchange).