strange dial tone

[wireless]

My landline is giving off a strange dial tone. Something like a continuous droning . Occurs on my cordless Panasonic phones and my kitchen wall phone. Swapped phones around and unplugged them still the same droning …Cannot receive or make call with this racket going on !

Any suggestions.


More... (https://forum.telus.com/t5/Internet-Home-Phone/strange-dial-tone/m-p/121642#M30059)