POTS lines are the old copper telephone lines that have provided residential and business telephone service since Alexander Graham Bell invented the telephone in 1876.
POTS (Plain Old Telephone Service) is an acronym used by telecommunication carriers to refer to these traditional telephone lines. POTS lines are used for more than just regular voice calls. They also service analog devices like security alarms, fire alarm panels, FAX lines, building and gate entry systems, public safety emergency phones on campuses, elevator lines, point-of-sale systems and more.
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