Abbreviation for Data Carrier Detected, a signal used in serial communications; sent by a modem to its computer to indicate that the modem is on line and ready for transmission. DCD is a hardware signal sent over line 8 in RS-232 connections. DCD is also called RLSD (Received Line Signal Detect).
Data Carrier Detect. An RS-232C signal that indicates the modem is receiving a carrier signal from a remote modem.
Data Carrier Detect. Indicates to the terminal device that the modem is receiving a valid carrier signal from a remote modem. The carrier is a tone at a specified frequency.
A control signal, defined in the RS-232 standard, generated by DCE to indicate that it is receiving a valid signal.
Data Carrier Detect. This tells the computer whether or not the modem is connected to another modem.
Data Carrier Detect. An RS232 input line that is generally held high by a modem while a data connection is active. See also: RS232
ata arrier etect. A signal sent to and indicating to a computer that a modem is connected and ready for transmission.
Data Carrier Detect. A signal defined by RS232. It is a signal that passes from the DCE to the DTE to show that the modem has established a valid connection with the remote system.