EIA-specified physical interface, with associated electrical signaling, between Data Circuit-terminating Equipment (DCE) and Data Terminal Equipment (DTE); the most commonly employed interface between computers and modems. Now known as EIA/TIA-232.
A set of standards specifying various electrical and mechanical signals for interfaces between computers, terminals, and modems. In personal computer world, the original PC and PC/XT used the 25-pin RS-232 With the introduction of the AT-class personal computers, the serial connector was reduced to the 9-pin version.
In asynchronous transmissions, a recommended standard interface established by the EIA. The standard defines the specific lines, timing and signal characteristics used between the computer and the peripheral device,and uses a 25-pin or 9-pin DB connector. RS-232-C is used for serial communications between a computer and a peripheral such as a printer, modem, digitzing tablet, or mouse. The maximum cable limit of 50 feet can be extended by using very high quality cable, line drivers to boost the signal, or short-haul modems. RS stands for recommended standard, and the C denotes the third revision of that standard. RS-232-C is functionally identical to the CCITT V.24 standard.