When The Dialled Line Is Busy Or There Is Not Answer; Reserving A Busy Line; To Answer The Callback Ringing From An Idle Extension - Panasonic KX-NS700 User Manual

PT/SLT/PS
While hearing a busy tone
6
C.Tone
Enter 6.
On-hook.
PT/SLT/PS
While hearing a callback ringing
R.B.Tone
Off-hook. Talk.