Aeronautical Radio Incorporated, ARINC, was founded in 1929. The company was owned jointly by four of the major airlines and its purpose was to provide in-flight communications between aircrews and various company facilities.
It made sense to have a separate company to handle routine communications so that each company did not have to establish their own network of ground communications stations. By using the ARINC network, a flight crew at cruise between San Francisco and Portland, for example, could get a phone patch to speak with their dispatcher in Chicago.
