For about a year we have had a problem with incoming calls. When a caller leaves a message and ends the call the answerphone makes a high-pitched whining sound for exactly 30 seconds and records this too. It does this after every message and always for 30 seconds.
Our answerphone is 6 years old so we bought a new answerphone but experienced the same problem. We took both our answerphones to a friend’s house to test them on his landline and had no problem with either of them.
I have found our very old BT answerphone and tested that at our home but it also recorded the 30 second whining sound.
So the problem is not with our phones. I have tried a new phone cable. I have tried plugging the phone into 3 different phone sockets including the Master socket but experience the 30-second whining sound at all of them.
It’s driving us mental. What can we do?
