Search Results for: Articles of cables
the world's circuit-switched telephone networks that are operated by national, regional, or local telephony operators, providing infrastructure and services for public telecommunication . the pstn consists of telephone lines , fiber optic cables , microwave transmission links, cellular networks , communications
satellites , and undersea telephone cables , all interconnected by switching centers , thus allowing most telephones to communicate with each other. originally a network of fixed-line analog telephone systems, the pstn is now almost entirely digital in its core network and includes mobile [ ] and other...
https://en.wikipedia.org/wiki/Public_switched_telephone_network