Since I have NOT been told the model of the MAIN BASE UNIT of your Panasonic system, I do not know the DETAILS about the Answering Machine.
But if it is like MANY other answering machines, there are several "settings" that can be changed - including the number of rings before the answering machine picks up calls.
Also, most service providers these days offer a "Voicemail System" (feature really) - which is DIFFERENT and SEPARATE from any "Answering Machine" that may be connected to the phone line at your location.
Those too often have "settings" that can be changed.
The REASON for my question - about CHANGING the number or rings and then TESTING - was to determine WHICH system was taking the calls.
If you would like to continue towards a better understanding of an Answering System vs. a Voicemail system, please find and send the model of the MAIN BASE UNIT of your Panasonic - so we can move in that direction.
If you are concerned more about fees charged by the site, use the following link to communicate with the Customer service folks here.
I await your response, Greg A.