In telecommunications, RS-232 (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). It is commonly used in computer serial ports. A similar ITU-T standard is V.24.
Reference:
http://en.wikipedia.org/wiki/RS-232
Reference:
http://en.wikipedia.org/wiki/RS-232
