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About: Data Carrier Detect     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatRS-232Signals, within Data Space : dbpedia.org associated with source document(s)

Type: broadcasteryago:Abstraction100002137yago:Communication100033020yago:Signal106791372yago:WikicatRS-232Signals New Facet based on Instances of this Class

Data Carrier Detect, abbreviated as DCD, or alternately Carrier Detect abbreviated as CD, is a control signal present inside an RS-232 serial communications cable that goes between a computer and another device, such as a modem. This signal is a simple "high/low" status bit that is sent "from DCE to DTE", or in a typical scenario, from the peripheral to the computer. It is present on virtually all PC serial ports - pin 1 of a nine-pin (DE9) serial port, or pin eight over a 25-pin (DB25) port. Its purpose varies depending on the device connected, but the most specific meaning is to indicate when a modem is connected to another remote modem via telephone lines.