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![Telephone exchange - Wikipedia, the free encyclopedia](https://www.iarticlesnet.com/pub/img/site/s_27.jpeg)
Telephone exchange - Wikipedia, the free encyclopedia
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日期:2024-08-24
A telephone exchange is a telecommunications system used in the public switched telephone network or in large enterprises. An exchange consists of electronic components and in older systems also human operators that interconnect (switch) telephone subscri...看更多