Section: 5.5.4 Advice of Charge
Content: The charging data collected from the network elements may be used to provide tariff information concerning the use of services, by both home and visiting subscribers, within the network. The appropriate tariff information to the network elements is distributed by the Advice of Charge supplementary service. The function is specified in TS 32.280[ Telecommunication management; Charging management; Advice of Charge (AoC) service ]  [40]. An alternative mode of AoC can also be used to indicate the occurrence of new charges to the user, e.g. when a monthly allowance is being exceeded, or when a service is requested that is not included in the subscription fees, while others are. This topic is for further study.