I was watching Contact, my favorite movie last night, and noticed that Ellie, when she's in The Machine and Control asks if she's doing alright, she replies reading you five by five. On Buffy, they couldn't figure out what Faith meant by it. Five by five is a radio communications expression that means 'loud and clear'. One of the fives represents the S units of reception strength. The other five is a rating of the signal clarity, so Five by five is a good, clear signal. In any event, I'm so happy that Kent was around to hear Ellie, even if the signal was one by one.