Which statements about PSTN are correct?

The correct answer is based on the understanding of what PSTN (Public Switched Telephone Network) truly encompasses.

PSTN is commonly referred to as POTS (Plain Old Telephone Service), which represents the traditional, circuit-switched telephone network that has been foundational for telecommunications. This designation signifies the basic analog telephone system that emerged in the early 20th century and is still in use today, making it a widely recognized term in the industry.

Additionally, PSTN refers to dedicated circuits, which are established pathways for communication that provide a consistent connection between two endpoints. These circuits are a key feature of the PSTN because they ensure a reliable and continuous service for phone calls, allowing for real-time communication without interruption.

While PSTN and VoIP (Voice over Internet Protocol) technology can sometimes interact, PSTN itself is not fundamentally designed to support VoIP. VoIP leverages internet technology for phone calls, which is separate from the traditional circuit-switched nature of PSTN.

Thus, the combination of the proper associations of both POTS and dedicated circuits confirms the accuracy of the statement, reinforcing why both elements are essential in defining PSTN correctly.