When I hang up my landline phone after being on a call, it immediatly rings once from an unlisted number. I have been looking around on the internet and have discovered that there are devices that once attached to your phone line need to be called by the person tapping them to activate the tap. This is probably all done automatically, and if someone does have my phone tapped their system must really suck because its doing this. I just need to know from someone familiar with counter surviellance, or telephone technology if this is the case? Thanks