Handset controls

Handset illumination

The display is automatically illuminated when there is an incoming call or a key is pressed. The display illumination automatically switches off after ten seconds if no key is pressed.

Key Lock

Use the Key Lock feature to disable key input and prevent any accidental operation.

Turning on Key Lock:

Menu

1. Press the Menu soft key.

#2. Press the # key.

Turning off Key Lock:

OFF

1. Press the OFF soft key.

#

2. Press the # key.

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Nortel Networks 4025 manual Handset illumination, Key Lock