# plain old telephone service

> English word · Noun

## Definitions
1. A traditional telephony system based on the analog transmission of sound, as opposed to newer alternatives like ISDN or VoIP.

## Etymology
A reinterpretation of the long-standing acronym POTS, originally standing for post office telephone system.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/plain-old-telephone-service