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PSTN - Public Switched Telephone Network
6:16
YouTubeSunny Classroom
PSTN - Public Switched Telephone Network
Today my topic is Public Switched Telephone System, or PSTN. PSTN is a century-old worldwide connected telephone network. The PSTN topology and class level might be different in different countries but the original design was only for circuit switching analog telephone calls. Nowadays, the backbone of the PSTN is mostly digital, and most local ...
128.1K viewsNov 25, 2018
Public switched telephone network History
Charlie Kirk's widow, Erika, gives first public remarks since husband's assassination
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Charlie Kirk's widow, Erika, gives first public remarks since husband's assassination
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Charlie Kirk's widow, Erika Kirk, makes first public remarks: 'Charlie loved America'
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Erika Kirk makes first public address after husband Charlie Kirk's shooting death
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Erika Kirk makes first public address after husband Charlie Kirk's shooting death
YouTubeNBC News
71.3K views5 days ago
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