Abstract
The AXE (Automatic Exchange Electric) switching system was the first fully automated digital switching system, and it converted speech into digital (i.e., the binary language used by computers). Ericsson developed it in 1977, and Ericsson’s competitors were still using the slower and less reliable analog systems. AXE had a modular system design, which made the system flexible and capable of evolving over time for use in different types of exchanges. New functionality could be added, and existing modules updated or replaced.
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Notes
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This is the information hiding principle that was introduced by Parnas in the early 1970s.
References
Meurling J et al (2001) The Ericsson Chronicles. 125 years in telecommunications. Informationsforlaget, Sweden
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O’Regan, G. (2018). AXE System. In: The Innovation in Computing Companion. Springer, Cham. https://doi.org/10.1007/978-3-030-02619-6_11
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DOI: https://doi.org/10.1007/978-3-030-02619-6_11
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