Abstract: A method of processing capacity information is disclosed. The capacity information relates to data capacity in a data network in which a consumer circuit is carried on, and consumes bandwidth made available by, a bearer circuit. The method comprises storing, in a network information database, an entity representing the bearer circuit, and associating capacity information with the bearer circuit entity specifying a first bandwidth quantity defining a quantity of bandwidth made available by the bearer circuit. Also stored is an entity representing the consumer circuit, and capacity information is associated with the consumer circuit entity specifying a second bandwidth quantity defining a quantity of bandwidth allocated to the consumer circuit.