Data circuit-terminating equipment
A Data circuit-terminating equipment (DCE) is a device that sits between the
data terminal equipment (DTE) and a
transmission circuit. It is also called data communications equipment and data carrier equipment.In a
data station, the DCE performs functions such as
signal conversion,
coding, and line clocking and may be a part of the DTE or intermediate equipment. Interfacing equipment may be required to couple the data terminal equipment (DTE) into a transmission circuit or
channel and from a transmission circuit or channel into the DTE.
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Data Communication Equipment
<
communications,
hardware> (DCE) The devices and connections of a communications network that connect the communication circuit between the data source and destination (the
Data Terminal Equipment or DTE). A
modem is the most common kind of DCE.
Before data can be transmited over a modem, the DTR (Data Terminal Ready) signal must be active. DTR tells the DCE that the DTE is ready to transmit and receive data.
DCE and DTE are usually connected by an
EIA-232 serial line. It is necessary to distinguish these two types of device because their connectors must be wired differently if a "straight-through" cable (pin 1 to pin 1, pin 2 to pin 2 etc.) is to be used. DCE should have a female connector and should transmit on pin two and receive on pin three. It is a curious fact that many
modems are "DTE" according to the original standard.
(1995-02-28)
(c) Copyright 1993 by Denis Howe
data communication equipment
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