Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
On Panasonic-made phones of the KX- line, there is usually a setting for 'key beep' (or a similar term), and so forth. Without looking up your particular model, I cannot be sure of that, so I am now researching your model's settings.
Thank you for your patienc... depending upon various factors, my answer may be posted within 5 to 20 minutes from now.