When were rotary phones replaced?

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Tags

1. #telephone
2. #introduced
3. #debut
4. #replaced
5. #first
6. #button
7. #commercial
8. #pittsburgh
9. #installed
10. #which
11. #rotary
12. #carnegie
13. #phone
14. #outside
15. #pennsylvania
16. #greensburg
17. #november
18. #decades