Carrier Of Record
Carrier of Record (or COR) for telecommunications, refers to the entity that provides PSTN The public switched telephone network (PSTN) provides infrastructure and services for public telecommunication Telecommunication is the transmission of information by various types of technologies over wire, radio, optical, or other el ... (Public Switched Telephone Network) service for an E.164 number. The exact definition of who and what is a COR is ultimately the responsibility of the relevant national regulatory authority. See also * Outline of telecommunication References Telephony {{telephony-stub ...
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Telecommunications
Telecommunication is the transmission of information by various types of technologies over wire, radio, optical, or other electromagnetic systems. It has its origin in the desire of humans for communication over a distance greater than that feasible with the human voice, but with a similar scale of expediency; thus, slow systems (such as postal mail) are excluded from the field. The transmission media in telecommunication have evolved through numerous stages of technology, from beacons and other visual signals (such as smoke signals, semaphore telegraphs, signal flags, and optical heliographs), to electrical cable and electromagnetic radiation, including light. Such transmission paths are often divided into communication channels, which afford the advantages of multiplexing multiple concurrent communication sessions. ''Telecommunication'' is often used in its plural form. Other examples of pre-modern long-distance communication inclu