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サマリー
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あらすじ・解説
The Public Switched Telephone Network (PSTN) has been at the heart of our business communications, providing reliable voice and data services for over a century. This traditional network, with its analogue technology and copper wires, has likely been a dependable part of your daily operations, too. However, with evolving technological demands, the PSTN is set to be switched off by early 2027.