AT&T gave feds access to all Web, phone traffic, ex-tech says (2007)
seattletimes.com
seattletimes.com
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"The diagram showed splitters glass prisms that split signals from each network into two identical copies. One copy fed into the secret room. The other proceeded to its destination"
Maybe that's the source for the Prism name?
But I don't think this is directly related to the Prism program though, since the Prism slides don't mention AT&T
Sensage was purchased by KEYW, a government contractor. All I know is that Common, Series A, and Series D were all big goose eggs ... $0.0000000.