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Circa 1909. "White House pantry." Harris & Ewing glass negative. View full size.
Built into the wall behind the call station is what looks to be a dumbwaiter, complete with a three button control -- presumably for Up, Down and Stop.
On the bottom shelf, probably blue. As if women wearing full-length skirts in 1909 didn't have enough to think about while doing their daily chores, those carpet wrinkles could cause some serious falls. Behemoth cupboard would have needed a stepladder to get into. Or did folks just stand on the counter like my kids used to??
Again, a call device on the wall, last seen in the Efficiency Kitchen. This one has a lot more call stations, 36 to be exact.
[I think it's more like 24. - Dave]
This is on the first floor apparently according to pictures here.