Panasonic KEY TELEPHONE User Manual page 54

5. Communicating Within Your Office
2. Do one of the following
To cancel DND . . .
For your extension
For another extension
3. Replace the handset or press the ON/OFF key.
54
Do . . .
Enter the Cancel DND code (default = 720).
a. Enter the Cancel DND Set by Other Phone code
(default = 750).
b. Dial the extension number.
Key Telephone User Guide