The number 5 crossbar dial telephone switching system

@article{Korn1950TheN5,
  title={The number 5 crossbar dial telephone switching system},
  author={F. A. Korn and James G. Ferguson},
  journal={Transactions of the American Institute of Electrical Engineers},
  year={1950},
  volume={69},
  pages={244-254}
}
  • F. Korn, J. G. Ferguson
  • Published 1950
  • Physics
  • Transactions of the American Institute of Electrical Engineers
The Number 5 Crossbar System is the newest switching system to be installed for use with dial telephones. It is capable of operation with all present local, tandem, and toll switching systems. It can be used for as few as four digits in a subscriber number, or as many as 11 digits may be used to code the called subscriber completely 
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8 Citations

8 Citations

Crossbar Tandem System
  • R. Collis
  • Physics
    Transactions of the American Institute of Electrical Engineers
  • 1950
THE RAPID mechanization of the local telephone plant throughout the Bell System, together with the continuous expansion of subscriber dialing areas, has made necessary the development of an automatic…
Automatic switching for nation-wide telephone service
A plan for automatic long-distance switching, which ultimately will embrace the whole of the United States and extend into Canada and perhaps Mexico, has been formulated and important steps have been…
An experimental remote controlled line concentrator
Concentration, which is the process of connecting a number of telephone lines to a smaller number of switching paths, has always been a fundamental function in switching systems. By performing this…
Signaling systems for control of telephone switching
Telephone signaling is basically a matter of transferring information between machines, and between humans and machines. The techniques developed to accomplish this have evolved over the years in…
Automatic toll switching systems
  • F. F. Shipley
  • Engineering
    Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics
  • 1952
THIS paper deals primarily with the major switching centers required for the nationwide automatic switching plan. These are called control switching points (CSP's) and are supplied with switching…
A Field Study of the Electrical Performance of Separable Connectors
A three-year study of separable electronic connectors in operating telephone equipment was conducted to determine failure mechanisms and rates of presently used designs. The study of nine different…
Distributed Digital Control: System Architecture for Power, Energy and Utility Applications
Fundamentals of the automatic telephone message accounting system
  • J. Meszar
  • Engineering
    Transactions of the American Institute of Electrical Engineers
  • 1950

References

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Crossbar dial telephone switching system
IT IS the purpose of this paper to describe briefly the crossbar dial-telephone central-office switching system which has recently been developed by the Bell System for use in large cities. Sixteen…
Crossbar Toll Switching System
IN AUGUST of 1943 a new mechanical toll switching system was placed in service in Philadelphia. It was designed by engineers of the Bell Telephone Laboratories and of the department of operation and…
Multifrequency pulsing in switching
Applications of multifrequency pulsing in switching are described in this article. Today, many installations of this type are being made in cities throughout the nation. This system permits operators…
Fundamentals of the automatic telephone message accounting system
  • J. Meszar
  • Engineering
    Transactions of the American Institute of Electrical Engineers
  • 1950