CCITT V24 Circuit Definitions
Circuit 102 - Signal Ground or Common Return
This conductor establishes the signal common return for
interchange circuits.
Circuit 103 - Transmitted Data
The data signals originated by the DTE, to be transmitted
via the data channel to one or more remote data stations,
are transferred on this circuit to DCE.
Circuit 104 - Received Data
The data signals generated by the DCE, in response to data
channel line signals received from a remote data station,
are transferred on this circuit to the DTE.
Circuit 105 - Request to Send
Controls the data channel transmit function of the DCE.
Circuit 106 - Ready for Sending
Indicates whether the DCE is conditioned to transmit data on
the data channel.
Circuit 107 - Data Set Ready
Indicates whether the DCE is ready to operate.
Circuit 108/1 - Connect Data Set to Line
Controls switching of the signal-conversion or similar
equipment to or from the line.
Circuit 108/2 - Data Terminal Ready
Controls switching of the signal-conversion or similar
equipment to or from the line.
Circuit 109 - Carrier Detect
Indicates whether the received data channel line signal is
within appropriate limits, as specified by the relevant
recommendation for DCE.
Circuit 110 - Data Signal Quality Detector
Indicates whether there is a reasonable probability of an
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