Bell System adopts rotary dial switching
1919
Switching Dialing
Dial phones spread to major cities
1920
Dialing
Introduction to the Dial Telephone (AT&T)
1936: Introduction to the Dial Telephone (AT&T)
Dialing
First customer-dialed long-distance call
1949
Dialing
Direct long-distance dialing begins
1951
Dialing
Now You Can Dial
1954: Now You Can Dial
Dialing
Dialing the Nation (AT&T)
1955: Dialing the Nation (AT&T)
Network Dialing
Touch-Tone dialing introduced
1963
Dialing