What does POTS Stand For?
POTS or Plain Old Telephone Service describes the oldest form of public telecommunications infrastructure and is based on analog signal transmission and formed the basis of the PSTN which was then advanced to include both POTS and ISDN and now SIP.
As a phrase, POTS has become less and less common place. This is mainly due to larger carrier networks focusing more on IP based communications combined with the increase in popularity of cloud-based business communication solutions. As a result, POTS is now historically important but as most businesses have already transitioned to their communications away from analog and ISDN solutions in favour of SIP and cloud, it is referenced less and less.