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> > I know, I KNOW. I figured that part out. What I want to know is *why*. At all the drive-throughs I've ever seen, the staff person at the window can *see* if there's a car coming. So what does the weight sensor *do*?
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> Ell"I've waited in the Jack In the Box drive-through long enough to earn an honorary uniform"myruh

Well, i used to work for a Del Taco which had a drive through, and i've noticed that most fast-food places in my area of southern California work about the same...

We could see when a car pulled up, but we couldn't see them once they were in front of the speaker-box. The sensor (whether it was metal or weight) would trigger the intercom system, starting with a loud ding/beep sound and then turning on the outside mic. We could not turn on the communications system ourselves, it was automatic.

Catti"hope this helps"brie