Editing Leased line (section)

{{Short description|Private telecommunications circuit}}
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A '''leased line''' is a private [[telecommunications circuit]] between two or more locations provided according to a commercial contract. It is sometimes also known as a '''private circuit''', and as a '''data line''' in the UK. Typically, leased lines are used by businesses to connect geographically distant offices.

Unlike traditional telephone lines in the [[public switched telephone network]] (PSTN) leased lines are generally not switched circuits, and therefore do not have an associated [[telephone number]]. Each side of the line is permanently connected, always active and dedicated to the other. Leased lines can be used for [[telephone]], [[Internet]], or other [[data communication]] services. Some are [[ringdown]] services, and some connect to a [[private branch exchange]] (PBX) or [[router (computing)|network router]].

The primary factors affecting the recurring lease fees are the distance between [[end station]]s and the [[Bandwidth (computing)|bandwidth]] of the circuit. Since the connection does not carry third-party communications, the carrier can assure a [[Service-level agreement|specified level of quality]].

An ''Internet leased line'' is a premium Internet connectivity product, normally delivered over fiber, which provides uncontended, symmetrical bandwidth with full-duplex traffic. It is also known as an ''Ethernet leased line'', [[dedicated line]], ''data circuit'' or [[private line]].