Panasonic KX-TEM824 User Manual page 35

To cancel all message waiting indications left at another extension
PT
D.Tone
Off-hook.
To lock/unlock message waiting indications
PT/SLT
7
Off-hook.
Enter 70.
7 0 3
Enter 70.
Enter 3.
lock code
0
lock code
Enter lock code (4000–9999)
2 times to lock or one time to unlock.
extension no.
Dial extension number.
lock code
Lock
OR
Unlock
1.2 Making Calls
C.Tone
Enter #. On-hook.
C.Tone
On-hook.
Enter #.
An SLT user can enter "0"
instead of "#".
User Manual 35