On Fri, 6 May 2016 14:59:27 -0700 (PDT), "
wrote:

Some cheap phone on a chip wired phones use a single chip to do double duty. But such a problem as you describe seems unlikely even with that eventuality. And even so, that would mean a bad phone due for landfill.

I'll also try unplugging the electricity next time, for a while. The
wired part of the phone doesn't need it except to make the bell ring
with a louder sound.

But first I'll check out the cordless phone when the corded phone
doesn't work right.

Peter Wieck
Melrose Park, PA