Thanks a lot -- that's a great help. And no, we weren't looking for rf from the infinity tranmitter, I knew they run on the phone line, but we were looking for other bugs. And I'm also aware of the great number of telemarketer autodialers (used to have one myself with a hardwired voice mailbox but didn't use it for telemarketing), but it was the timing of these cals that aroused our suspicions. That and the really frequent phone company truck. Good to know about the possible out of the building, we'll have to start checking that out.