Panasonic KX-TES824 User Manual page 38

1.2 Making Calls
PT/SLT
While hearing the DND tone
2
R.B.Tone
Enter 2.
• If you hear the DND tone, enter "2", and then hear a busy tone, the called extension is
busy. You can use the Automatic Callback Busy feature.
38 User Manual
Talk.