The actual symbol frequency being used to transmit data. The term baud rate is often used incorrectly as an equivalent to bits per second (bit/s, bps or b/s). For example, both ITU-T V.22bis (2400 b/s) and V.22 (1200 b/s) modems transmit data at 600 bauds, but V.22bis modems use four bits per symbol and V.22 modems use two.