Phone system notes

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Mobile style

See Electronics notes/Cell phone notes

Landline style

POTS usually refers to Plain Old Telephone Service - often meaning in context of phones or acoustic modems, and in the last case often in contrast with broadband internet.

PSTN (Public switched telephone network) carries a similar meaning.

Connecting phones or modems together



Devices on a line

Notes on basic service, phone line switching, and dialing