Editing Telecommunication circuit (section)

==Definitions==
A telecommunication circuit may be defined as follows:{{cn|date=September 2019}}

* The complete path between two terminals over which one-way or two-way communications may be provided.
* An electronic path between two or more points, capable of providing a single or multiple [[channel (communications)|communication channels]].
* An electronic closed-loop path among two or more points used for [[signal]] transfer.
* The [[transmission media]] and any intermediate equipment between [[data terminal equipment]].<ref>{{cite standard |institution=[[Institute for Telecommunication Sciences]] |number=[[Federal Standard 1037C]] |url=https://www.its.bldrdoc.gov/fs-1037/fs-1037c.htm |archive-url=https://web.archive.org/web/20220122224547/https://www.its.bldrdoc.gov/fs-1037/fs-1037c.htm |archive-date=22 January 2022 |title=Data transmission circuit}}</ref>

In operational terms, a telecommunication circuit may be capable of transmitting information in only one direction (''simplex'' circuit), or it may be bi-directional (''duplex'' circuit). Bi-directional circuits may support half-[[Duplex (telecommunications)|duplex operation]], when only one end of the channel transmits at any one time, or they may support full-duplex operation where independent simultaneous transmission occurs in both directions.<ref name=freeman>{{Cite book|title=Fundamentals of Telecommunications|last=Freeman|first=Roger L.|publisher=John Wiley & Sons, Inc.|year=1999|isbn=0471296996|url-access=registration|url=https://archive.org/details/fundamentalsofte0000free}}</ref>