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Integral 33/55
Setting the handset
Lighting
MM588 and MM780 handsets have an illuminated display and keypad.
MM780 Ex T4 handset has an illuminated display.
Menu Set telephone
Menu Lighting
Select the type of lighting, e.g. off . You may choose between
off and automatic (lighting is switched on automatically when the handset is
used).
Confirm.
The functions
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