This is contrast to parallel communication, where multiple bits of data are sent at a time using multiple data lines. Originally, the DTEs in RS32 are electromechanical typewriters and DCEs are modems. RS232 uses serial communication, where one bit of data is sent at a time along a single data line. RS232 is one of the oldest serial communication standards with ensured simple connectivity and compatibility across different manufacturers. RS232 was introduced in 1960’s and was originally known as EIA Recommended Standard 232. DCE stands for Data Communication Equipment or Data Circuit Terminating Equipment and an example for DCE is a modem. Here, DTE stands for Data Terminal Equipment and an example for DTE is a computer. RS232 defines the signals connecting between DTE and DCE. RS232 is a Serial Communication Standard developed by the Electronic Industry Association (EIA) and Telecommunications Industry Association (TIA). RS232 is one of the most widely used techniques to interface external equipment with computers.
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