Autocall is more common in 1990s era construction, particularly schools. EST Genesis and Integrity signals are becoming more common in some parts of the county.
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I don’t know about Autocall, because it looked like they possibly fell from the face of this planet in the 1990s, if not some time before!
But, it looks like during the 1980s and possibly the 1990s, Federal Signal owned Autocall.
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I am talking about Grinnell/Autocall and Thorn-Autocall here. These systems mostly have FOS 6120 horn/strobes or even Wheelock EHSs or MTs!