from howstuffworks.com
"If people did want to eavesdrop, they could tap into almost any phone line quite easily.
When you open up a phone, you can see that the technology inside is very simple. The simplicity of design makes the phone system vulnerable to surreptitious eavesdropping. In this article, we'll explore the practice of wiretapping to see just how simple it is. We'll also look at a few different types of wiretaps, find out who taps phone lines and examine the laws that regulate this practice. To learn how wiretapping works, you first have to..." (more)
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How a private individual can detect wiretapping... (more)
How a business or government can detect wiretapping... (more)
