Data communication is the exchange of electronic data over some medium like cables or microwaves. Data may be transferred from one device to another by means of any communication medium but before that data may be encoded as digital signals. These digital signals consist of binary digits 0 & 1 and electrical pulses are used to represent binary digits.
Data communications services provide networking solutions for inside campus, including connections between two campus locations.Data communication service like point-to-point circuits provides connection for alarm, bells, and more. Many Australian companies are manufacturing all these kind of products.
Another service called off-campus communication circuits provide data services from a campus building served by the campus wiring distribution system to an off-campus location. You can find details about all data communication related services here.