PP Presentation

• RS-449 has signal ground, send common and receive common, TxD, RxD, RTS, CTS, DSR, DTR, RI (ring indicator) etc. It is like RS-232-C (and CCITT V.24) with 30 pins (on a 37 pin connector). Rs-232-c defines 21 signals (on a 25 pin connector).

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