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{{Short description|Communications system component}}
[[File:Terminaladapter X.21.jpg|thumb|Terminal adapter for X.21]]
[[File:RS-232 POTS DTE DCE.svg|thumb|Two ''data stations'' (''terminals'', ''stations'') each comprised of a DCE and a DTE, connected via a network. ]]
A '''data circuit-terminating equipment'''<ref name="TIA_1997_232F"/> ('''DCE''') is a device that sits between the [[data terminal equipment]] (DTE) and a [[data transmission circuit]]. It is also called '''data communication(s) equipment'''<ref name="EIA_1969_RS232C"/><ref name="DIN_44302"/> and '''data carrier equipment'''.{{cn|date=May 2013|reason=The definition of DCE I have seen most often over the decades is Data Communication Equipment. I would like to see more *historic* references for the various definitions.}} Usually, the DTE device is the [[Terminal (telecommunication)|terminal]] (or [[computer]]), and the DCE is a [[modem]].
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