Filter Tech Innovation by: All Patents (22) Switching (22) Wireless Tech (22) Electronics (19) Phreaking/Hacking (19) Wired Tech (12) Digitization (8) Telegraph (7) Bell Labs Records (436)
Puskas introduces the multiplex switchboard
Tivadar Puskás
1887
Almon Strowger invents the automatic switch
Almon Strowger
Automatic Electric
1889
PDF: Switchboards Bulletin 11
Switchboards Bulletin 11
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Kellogg Switchboard and Supply Switchboards
1915
Crossbar switching introduced
Crossbar switching introduced
Bell Labs
1938
PDF: The Crossbar System Bell Labs
The Crossbar System Bell Labs
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Bell Labs
1939
The Step-By-Step Switch
The Step-By-Step Switch
1951
PDF: Strowger Automatic: A Sixty Year Report
Strowger Automatic: A Sixty Year Report
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Automatic Electric Almon Strowger
1952
PDF: Ericsson 1953 crossbar switching brochure
Ericsson 1953 crossbar switching brochure
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L.M. Ericsson
1953
PDF: No. 3 Toll Switchboard Bul. 5410
No. 3 Toll Switchboard Bul. 5410
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Kellogg Switchboard and Supply Switchboards
1954
A Surreal Look at Telephone Switching
A Surreal Look at Telephone Switching
1958
PDF: Ericsson 1964 electronic switching brochure
Ericsson 1964 electronic switching brochure
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L.M. Ericsson
1964
Electronic Switching System, Central Office Debut (Bell System)
Electronic Switching System, Central Office Debut (Bell System)
AT&T / Bell System
1965
No. 1 ESS switch enters commercial service
No. 1 ESS switch enters commercial service
1965
Under London Trunk Telephone
Under London Trunk Telephone
General Post Office/BT
1968
First 'plugless' digital operator stations (TSPS), in Morristown, NJ
First 'plugless' digital operator stations (TSPS), in Morristown, NJ
AT&T / Bell System
1969
Hoover invents computerized call switching
Erna Schneider Hoover
Bell Labs
1971
PDF: Ericsson 1976 digital switching brochure
Ericsson 1976 digital switching brochure
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L.M. Ericsson
1976
No. 4 ESS digital toll switch deployed
1976
Northern Telecom DMS-100 digital switch
Northern Electric/Telecom
1978
Siemens debuts digital telephone switching
Siemens
1980
Speedy Cutover Service, SXS to ESS (AT&T)
Speedy Cutover Service, SXS to ESS (AT&T)
AT&T / Bell System
1984
SS7 signaling becomes widespread
1991