(1) Data Circuit-terminating Equipment. In a data station, the equipment that performs Functions such as signal conversion and coding, at the Network end of the line between the data terminal equipment (DTE) and the line, and may be a separate or an integral part of the DTE or of intermediate equipment. (2) The interfacing equipment that may be required to couple the data terminal equipment (DTE) into a Transmission circuit or Channel and from a transmission circuit of a channel into the DTE. (3) Data Communications Equipment. Any equipment that connects to Data Terminal Equipment (DTE) to allow data transmission between DTEs. A Modem is a type of DCE.

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