Personal computers used them for connections not only to modems, but also to printers, computer mice, data storage, uninterruptible power supplies, and other peripheral devices.Ĭompared with later interfaces such as RS-422, RS-485 and Ethernet, RS-232 has lower transmission speed, shorter maximum cable length, larger voltage swing, larger standard connectors, no multipoint capability and limited multidrop capability. The RS-232 standard had been commonly used in computer serial ports and is still widely used in industrial communication devices.Ī serial port complying with the RS-232 standard was once a standard feature of many types of computers. The current version of the standard is TIA-232-F Interface Between Data Terminal Equipment and Data Circuit-Terminating Equipment Employing Serial Binary Data Interchange, issued in 1997. The standard defines the electrical characteristics and timing of signals, the meaning of signals, and the physical size and pinout of connectors. ![]() It formally defines signals connecting between a DTE ( data terminal equipment) such as a computer terminal or PC, and a DCE ( data circuit-terminating equipment or data communication equipment), such as a modem. In telecommunications, RS-232 or Recommended Standard 232 is a standard originally introduced in 1960 for serial communication transmission of data. ![]() A DB-25 connector as described in the RS-232 standard Data circuit-terminating equipment (DCE) and data terminal equipment (DTE) network ![]() For RS-232 variants, including the common 9-pin connector, see serial port. This article is about the RS-232, standard.
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