is the global collection of interconnects originally designed to support circuit-switched voice communication. The PSTN provides traditional Plain Old Telephone Service (POTS), also known as "landline phone" service, to residences and many other establishments. Parts of the PSTN are also utilized for DSL
and other Internet-based network technologies.
One PSTN link supports 64 kilobits per second (Kbps) of bandwidth for data. In residences, the PSTN phone line typically carries this bandwidth over a copper cable. Traditional dial-up network modems utilize nearly 56 Kbps of this bandwidth when connected to a phone line. The PSTN utilizes the SS7 signaling protocol.
Also Known As: Public Switched Telephone Network