Okay, if the problem still continues, it is not a panasonic issue. This is a fault in the line.
You'll need to contact your phone (cable) company, and they will need to send a tech out to check the equipment on their end.
If you need more information, just let me know.
Otherwise, to clarify how the site works, regarding your comment about the payment:
I am an independent technician and I've spent my personal time, unpaid, in a good faith effort to assist with the question for which you solicited my services. I am only paid for my efforts when customers such as yourself leave positive feedback for my work. Again I apologize there is not a better outcome here, though this is really beyond either of our control - in cases such as this I'm limited to diagnosing and explaining the problem.
I do hope you’ll consider leaving a positive rating for me, rather than “shoot the messenger”, so that I may get credit for my time spent in good faith to answer your question accurately.