AASTRA 4222 Office for MX-ONE (TSE) User Guide EN - Manual (Page 87)

87 Dialog 4220 Lite/Dialog 4222 Office
Installation
Install key panel (optional)
(Dialog 4222 Office phone only).
1 Fasten the connector in the bottom of the hole using a finger or
a blunt tool. Make sure the connector fits before pressing it
down.
2 Press where the arrows are pointing, until you hear a “Click”
sound.
3 Install the stands as shown in the picture in section “Stand
positioning”.
Note: The key panel must be of type DBY 419 01, and it can
only be used in newer versions of the exchange.