AT&T announces their designation of 911 as a universal emergency number at a press conference in the Washington (DC) office of Indiana Rep. Ed Roush, who had championed for Congressional support for "one number." AT&T's plan affected only the Bell companies, and not any of the independent telephone companies. Up to this point, the number "911" wasn't mentioned in any literature, and apparently wasn't identified until the press conference. In fact, a Wall Street Journal article written the day before the press conference didn't mention "911" as the number that AT&T selected.
http://en.wikipedia.org/wiki/9-1-1
