For folks who might be interested to know more;

ARINC defines a series of standards for Avionics Systems and Communications - https://en.wikipedia.org/wiki/ARINC

ARINC 429 is the most widely used data bus standard for aviation. Electrical and data format characteristics are defined for a two-wire serial bus with one transmitter and up to 20 receivers. The bus is capable of operating at a speed of 100 kbit/s. - https://en.wikipedia.org/wiki/ARINC_429