AT&T SYSTEM 25 Manual page 121

Turning On a Message Waiting Light Without Ringing the Voice Terminal
1 Lift the handset and listen for dial tone.
Press
2
The light next to this button turns on.
Dial the PDC.
3
4 Listen for confirmation tone and then hang up.
The light next to this button turns off.
Message Waiting Light While Talking to the Person
Turning Off a
1 If the light is on, press
The light next to this button turns off.
Hang up.
2
Turning Off a Message Waiting Light Without Ringing the Voice Terminal
1 Lift the handset and listen for dial tone.
Press
2
The light next to this button turns on.
Dial the PDC.
3
The light will remain lit.
4 Listen for confirmation tone and then press
The light next to this button turns off.
Hang up.
5
3-4 Attendant Features
.
[ATT MSG]
[ATT MSG].
[ATT MSG].
again.
[ATT MSG]