Voice Communication

PSTN: Public Switched Telephone Network
A detailed overview of the Public Switched Telephone Network (PSTN), its history, functionality, and modern-day relevance with comparisons to ISDN.
VoIP: Technology for Making Voice Calls Over the Internet
Voice over Internet Protocol (VoIP) is a transformative technology that enables voice communication over the internet, offering cost-effective and versatile alternatives to traditional telephony.

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