Kansas City Standard - The Original 300 Baud Standard

The Original 300 Baud Standard

The original standard recorded data as "marks" (one) and "spaces" (zero). A mark bit consisted of eight cycles at a frequency of 2400 Hz, while a space bit consisted of four cycles at a frequency of 1200 Hz. A word, usually one byte (8 bits) long, was recorded in little endian order, i.e. least significant bit first. 7-bit words were followed by a parity bit.