Generally capped at 20 kbps, though modern hardware often pushes this to 115.2 kbps or higher.
Understanding this relationship is crucial. If you connect a DTE device to a DCE device, you use a "straight-through" cable (Pin 2 to Pin 2, Pin 3 to Pin 3). If you connect two DTE devices (e.g., two PCs), you must use a "null modem" cable, which crosses the transmit and receive lines so the two devices can talk.
Revision F remains the active standard today, serving as the definitive reference for serial communication design.
While the TIA EIA-232-F specification does not strictly mandate a specific connector size, it strongly implies the use of the DB-25 connector. However, modern implementations frequently use the smaller DB-9 connector.
The standard, issued in 1997, is the latest revision of the widely known "RS-232" serial communication interface. It defines the mechanical, electrical, and functional characteristics for serial binary data interchange between Data Terminal Equipment (DTE) (e.g., a computer) and Data Circuit-terminating Equipment (DCE) (e.g., a modem) . Electrical Characteristics
