Hello, I’m Nathan, and I’ll be assisting you today. My livelihood depends on your positive feedback, so your satisfaction is my highest priority.
Sorry to hear you’re having trouble.
My apologies for any delay in getting you an appropriate reply. Your question was mistakenly routed to the computer category here, but you've now been reassigned to me, a phone tech.
I have to disagree with the prior tech. If the phone system has been working well up until now, this is not likely to be a wiring issue, and there is no need to tear into the walls.
You have a cordless phone system, and both are working off of the same base station and ultimately the same all jack.
A more important question for diagnostic purposes would be: Do you have any other phone, outside of the panasonic cordless system, that you can use to test the line (On any available wall jack)? A basic corded or wall phone would be ideal. If you can test that, we can diagnose this more reliably.