carrier detect
The wire in an RS-232C cable that holds the information as to whether the modem senses a carrier. Also called CD.

Dictionary of telecommunications. . 2000.

Look at other dictionaries:

  • carrier detect —    Abbreviated CD. An electrical signal sent from a modem to the attached computer to indicate that the modem is online.    See also Data Carrier Detect; RS 232 C …   Dictionary of networking

  • carrier detect — detection of a carrier signal, detection of a communications tone …   English contemporary dictionary

  • carrier detect threshold — A way of measuring how well a modem can detect valid data over noisy phone lines. It is measured in negative dBm s (decibel milliwatts). The bigger the number (the more negative) the better. For example, 45 dBm is better than 40 dBm. Same as… …   Dictionary of telecommunications

  • Data Carrier Detect — 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… …   Wikipedia

  • data carrier detect — See DCD …   Dictionary of telecommunications

  • Data Carrier Detect —    Abbreviated DCD. A hardware signal defined by the RS 232 C standard that indicates that the device, usually a modem, is online and ready for transmission …   Dictionary of networking

  • Carrier sense multiple access with collision detection — (CSMA/CD), in computer networking, is a network control protocol in which *a carrier sensing scheme is used. *a transmitting data station that detects another signal while transmitting a frame, stops transmitting that frame, transmits a jam… …   Wikipedia

  • Carrier Ethernet — Carrier Ethernet: the extensions to Ethernet necessary to enable telecommunications network providers ( common carriers in US industry jargon) to provide Ethernet services to customers and to utilise Ethernet technology in their… …   Wikipedia

  • Carrier sense multiple access — (CSMA) is a probabilistic Media Access Control (MAC) protocol in which a node verifies the absence of other traffic before transmitting on a shared physical medium, such as an electrical bus, or a band of electromagnetic spectrum. Carrier Sense… …   Wikipedia

  • Carrier Alert — A community service program in which a letter carrier attempts to detect possible illness or accident suffered by the customer (for example, elderly persons or persons with disabilities). When alerted by an accumulation of mail, the carrier… …   Glossary of postal terms

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