The (Recommended Standard 232) is a standard for serial binary data signals connecting between a DTE (Data Terminal Equipment) and a DCE (Data Circuit-terminating Equipment). The RS232 standard describes a communication method where information is sent bit by bit on a physical channel.

Below links provides detail information about Serial and Pinout:

  1., this page provides information about introduction to specifications, bit streams, physical properties, and error detection.
  2., this page from contains detail information about serial scope of standard, history, limitations, role in modern personal computers, voltage level, connectors, pinouts, signals and cables, RTS/CTS handshaking, 3-wire and 5-wire , signal rate selection, loopback testing, timing signals, secondary channel and related standards.
  3., included in this page explanation about serial layout, S232 serial pin assignment, RS232 DB9 to DB25 converter, RS232 serial loopback test plugs, RS232 null modem cables, Spy / monitor , Serial printer cables, and Yost RS232 on RJ45 standard.

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