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data carrier detect (DCD)

Data Carrier Detect (DCD) is a carrier identifier (CD). It is a control signal generated by the data transmission equipment (DCE) indicating that the data terminal equipment (DTE) can receive data

. For modem connections

, it isa signal

with afrequency suitable for the modem

. The DCD signal is unidirectionally directed and is transmitted from the data terminal equipment to the data transmission equipment. It can only assume the logical states High or Low and is used in RS-232-C, for example. In the 9-pin Sub-D connector of RS-232-C, pin 1 is assigned with the DCD signal, in the 25-pin it is pin 8.

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Englisch: data carrier detect - DCD
Updated at: 04.06.2011
#Words: 79
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Translations: DE