Strowger system

Strowger system

[′strō·gər ‚sis·təm]
(communications)
An automatic telephone switching system that uses successive step-by-step selector switches actuated by current pulses produced by rotation of a telephone dial. Also known as step-by-step system.
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References in periodicals archive ?
Marconi has on several occasions in recent times implied that they have been at the the old Strowger Works in Edge Lane since 1912 and made the old Strowger System.
By 1912 a new company, the Automatic Telephone Manufacturing Company, was set up at the site to manufacture automatic telephone exchanges using the Strowger system, which was quickly established as the UK exchange standard by the Post Office.
This is in sharp contrast with our existing System X exchanges, which require equipment the size of a tennis court to handle 50, 000 subscribers, and the old Strowger system, which needed an exchange the size of a football pitch.
That compares to an old exchange the size of a football pitch being needed to cope with 100,000 telephones using the old Strowger system,also built in Liverpool until 1985.