Quote Originally Posted by Lady's Human
Unless you are using the phone, it is impossible for someone to hear what's going on in the house.

Baby monitors pick up transmissions from radio, (A mike and transmitter in a baby's room) not plain voice.

To listen in on a phone call, a baby monitor would have to be using the exact same frequency and be using the same transmission format as the phone.

So, are you saying that it's highly unlikely? I wouldn't think it possible, but
I don't know for sure.