Search results
Results from the WOW.Com Content Network
The Strowger switch has three banks of contacts. Toward the upper end of each shaft are two ratchets. The upper one has ten grooves, and raises the shaft. The lower one has long vertical teeth (on the other side, hidden). The Strowger switch uses two telegraph-type keys on a telephone set for dialing. Each key requires a separate wire to the ...
AT&T Long Distance was the primary customer for the switch. Driving development from the customer's perspective was AT&T VP Billy Oliver. [4] Previous tandem switching systems, primarily the No. 4 Crossbar switch, used analog voice signaling. The decision to switch in a digital voice format was controversial at the time, both from a technical ...
Almon Brown Strowger (/ ˈ s t r oʊ dʒ ər /; February 11, 1839 – May 26, 1902) was an American inventor who gave his name to the Strowger switch, an electromechanical telephone exchange technology that his invention and patent inspired.
Telephones were manufactured at that facility from 1935 to 1953, when Automatic Electric sold the cable plant and built a 33-acre, $1.5 million telephone factory at 100 Strowger Boulevard. [5] The Strowger Boulevard factory was sold to BC Tel (as Microtel) in 1979, then was owned by Nortel (as Brock Telecom) from 1990 to 1999; it closed in 2002 ...
PBX switchboard, 1975. A telephone switchboard is a device used to connect circuits of telephones to establish telephone calls between users or other switchboards. The switchboard is an essential component of a manual telephone exchange, and is operated by switchboard operators who use electrical cords or switches to establish the connections.
The director telephone system was a development of the Strowger or step-by-step (SXS) switching system used in London and five other large cities in the UK from the 1920s to the 1980s. A large proportion (c. 70% to 80%) of telephone traffic in large metropolitan areas is outgoing traffic, and it is distributed over many exchanges.
The second fundamental Bell patent for telephones expired on January 30, 1894, which provided an opportunity for independent companies to provide telephone services, although some had been established before that date. The Strowger Automatic Telephone Exchange company had been formed on October 30, 1891.
Strowger may refer to: Strowger switch , automatic telephone exchange equipment Strowger Automatic Telephone Exchange Company , the company that manufactured Strowger switches