Check out the TV story re: North Carolina State University in Raleigh:
http://abclocal.go.com/wtvd/story?secti ... id=5994256
This one is from Sept. 2007:
They call it "Wolfalert"
Looks very much like ATI, if my eyes aren't too bad. Can't report yet how many there are around campus. 30,000 people on the campus (students, faculty, etc.) in downtown Raleigh.
I've seen some Federal MOD speaker arrays at UNC-Chapel Hill, also. They were supposed to have a test this past Monday, March 17th, but postponed due to memorial service on Tuesday for the murdered president of the student body.