Panasonic KX-TD612NZ User Manual page 185

T7436/T7235
Features
Press "Features".
C.Tone
On-hook.
User Manual
OR
NEXT
Rotate Jog Dial or
press "NEXT" until the
following is displayed.
COS Primary (ext)
COS Secondary (ext)
Press "COS Primary" or
"COS Secondary".
Operator Operation
extension no. extension no.
Enter
extension number.
185