RS-232 / RS-422 / RS-485
RS-232 - overview of RS-232 standard
The RS-232 is a popular communications protocol for connecting computers to modems and varied peripherals. Here is a complex of useful information, instructions, tips & tricks, datasheets and etc. You can find pinout of the standard connectors, what is HANDSHAKING, wiring with IC's from MAXIM - MAX232.
RS-232 Signals Functional Description
In this article you will find a functional description of RS-232 signals.
Hungarian
Polish
Russian