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In a Public Switched Telephone Network (PSTN), the primary types of media used for voice communication include copper twisted pair cables, which are the most common for residential phone lines, and fiber optic cables, which provide higher bandwidth and quality for long-distance communication. Additionally, coaxial cables are sometimes used in hybrid networks that combine telephony and internet services. Satellite links can also be part of PSTN infrastructure, particularly for remote areas. Each medium has its own characteristics in terms of bandwidth, distance, and signal quality.

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5d ago

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