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Plain old telephone service
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==See also== {{Portal|Telephones}} * [[25-pair color code]] * [[Basic exchange telecommunications radio service]] * [[Category 1 cable]] * [[Dual-tone multi-frequency signaling]] * [[Local telephone service]] * [[Managed facilities-based voice network]] * [[Network interface device]] * [[Publicly Available Telephone Services]] * [[Registered jack]] β the type of telephone jack common in most of the world for single-line POTS telephones * [[Twisted pair]], used as cabling in POTS
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