Wiktionary
n. (context computing English) The movement of data between computers, or between central computers (especially mainframes) and remote terminals.
Usage examples of "data communications".
According to a senior NSA official, by the fall of 2000 only 2 percent of AT&T's voice and data communications were transmitted over microwave towers in the United States.
Originally it had been instituted in response to the need for a single authority to assume overall responsibility for operation of the integrated data communications and computing network that emerged when the military systems were declassified and merged into the already integrated commercial-industrial-scientific complex to form the EARTHCOM net.
Along with providing a secure, efficient communications link, Guardrail could also eavesdrop on radio, TV, cellular, telephone, and data communications for a hundred miles in any direction, and could break in on conversations or broadcast on civil channels or frequencies.