AT&T SYSTEM 25 Manual page 77

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Turning On a Message Waiting Light While on a Coverage Call
1
Answer the call and take a message.
2
If the light beside the button is off, press
3 Hang up.
Turning On a Message Waiting Light While Not on a Coverage Call
1
Lift the handset and listen for dial tone.
2
Press
3
Dial the PDC of the voice terminal you want to signal.
4 Listen for confirmation tone and then hang up.
Turning Off a Message Waiting Light
1
Lift the handset and listen for dial tone.
2
Press
Dial the PDC of the voice terminal you want to signal.
3
4
Listen for confirmation tone.
5 Press
Hang up.
6
2-64 Voice Terminal Features
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