I said, "Hey, Mary, this is Carl Randolph from Engineering in San Ramon. I have a circuit I’m tracing, and it appears to originate from your office." Apparently I was on solid ground all around, since Mary didn’t hesitate, asking me for the trunking information. I gave it to her, and she put me on hold while she checked. Since phone phreaks rarely targeted toll switches, she didn’t even bother to verify my identity.