Tech Stuff - RS-232 Cables, Wiring and Pinouts
Pin No. Name Dir Notes/Description 1 DCD IN Data Carrier Detect. Raised by DCE when modem synchronized. 2 RD IN Receive Data (a.k.a RxD, Rx). Arriving data from DCE. 3 TD OUT Transmit Data (a.k.a TxD, Tx). Sending data from DTE. 4 DTR OUT Data ......