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RS-232/V.24 Signals
TD
Transmitted Data. Data going from DTE to DCE.
RD
Received Data. The Data going from DCE to DTE.
RTS
Request to Send. Hardware handshake generated by the DTE to determine if the DCE is ready to
receive data. Expected response is from the CTS line.
CTS
Clear To Send. Hardware handshake by DCE in response to an RTS signal.
DSR
Data Set Ready. The DCE-equipment is powered and usable.
DTR
Data Terminal Ready. The DTE-equipment is powered and usable.
DCD
Data Carrier Detect. A signal from the DCE indicating that a carrier is present on the line.
Simplex
Uni-directional communication.
Start bit
Marks the start of a character at asynchronous communication.
Stop bit
One or more stop bits marks the end of a character at asynchronous communication. Systems that
require more than one stop bit may have problems during communication via modems, since modems
most often remove the second stop bit.
6178-2203
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