AT&T Definity ISDN 7507 - Manual (Page 41)

Self-Test
✔
To test the lights and 1
ringer of your voice
terminal
2
3
4
5
Press

Select

(while on-hook)
● Green light comes on
Press

Drop

● Self-test begins
● If the test passes, the following will occur;
proceed to Step 3
— You will hear periodic tones if the test is
proceeding correctly
— The green Message light comes on
Once you have heard a tone, you can press each
button that has a light(s). The green light comes on
indicating the button works correctly
Lift the handset; the green light will flutter. Press
each button on the dial pad
[tones in handset]
After the last button press, press the

Select

button, then press the

Drop

button to exit and
return to the calling mode