[William Terrell]

How by having their voice telephone conversations taped because they are receiving incoming calls from known terrorists residing in another country?

No, by misdialing a number of a known suspected terrorist number, or someone whose number is recorded as having called a known suspected terrorist number.

[marajade]

"No, by misdialing a number of a known suspected terrorist number, or someone whose number is recorded as having called a known suspected terrorist number."

You are terribly confused by the whole thingy. In the case quoted by you above, a warrant initiated by the executive branch and approved by the judicial branch would be required in order for it to happen.