Panasonic · KX-TG/TGF Series
The phone is set to use pulse (rotary) dialing. This is for older phone lines that do not support tone dialing.
Click steps to track your progress.
If you cannot make calls, check the 'Dialing mode' setting (MENU #120) and change it to 'Tone' if your phone line supports it.
Ensure the 'Pulse' setting is selected if you have a rotary/pulse phone line.