Panasonic KX-TEA308 User Manual page 122

2.1 Control Features
To erase
PT/SLT
Off-hook.
122 User Manual
7 2 2
common BV OGM no.
Dial common BV OGM
Enter 722.
number (01–24).
0
C.Tone
Enter 0. Enter #.
An SLT user can enter "0"
instead of "#".
On-hook.