Panasonic KX-TD816NZ - Manual (Page 108)

2.9 Using the Display Proprietary Telephone
108
Operation
To call back
How to treat the 16th call
Off-hook. Press “CALL.”
When the desired number is displayed
D – PT
CALL
Off-hook. On-hook. Dial 1 to overwrite
or 0 to disregard.
Overwrite
Disregard
1
0
Dial 56.
5 6 OR
D PT
C.Tone