Editing Multiplexing (section)

===Telephony===
In [[telephony]], a [[customer]]'s [[local loop|telephone line]] now typically ends at the [[remote concentrator]] box, where it is multiplexed along with other [[telephone line]]s for that [[neighborhood]] or other similar area. The multiplexed signal is then carried to the [[telephone exchange|central switching office]] on significantly fewer wires and for much further distances than a customer's line can practically go. This is likewise also true for [[digital subscriber line]]s (DSL).

[[Fiber in the loop]] (FITL) is a common method of multiplexing, which uses [[optical fiber]] as the [[Backbone network|backbone]]. It not only connects [[Plain old telephone service|POTS]] phone lines with the rest of the [[PSTN]], but also replaces DSL by connecting directly to [[Ethernet]] wired into the [[home]]. [[Asynchronous Transfer Mode]] is often the [[communications protocol]] used.{{citation needed|date=June 2018}}

[[Cable TV]] has long carried multiplexed [[television channel]]s, and late in the 20th century began offering the same services as [[telephone companies]]. [[IPTV]] also depends on multiplexing.