H OTS POT GATEWAY246 The Subscriber InterfaceAuthorization and BillingAs a gateway device, the HSG enables plug-and-play access to broadband networks.Broadband network solution providers can now offer their subscribers a wide range ofhigh speed services, including access to the Internet. Of course, a high speed Internetconnection is not free – subscribers pay an access fee, based on the duration of theirconnection. Additionally, subscribers may want to take advantage of the solutionprovider’s local network services (for example, purchasing goods and local services).In either case, the subscriber is required to pay. And naturally, subscribers expect topay only for the services rendered to them.In any environment, billing is a complex process. It requires accurate data collectionand reconciliation, a means to validate and protect the data, and an efficient methodfor collecting payments.The HSG offers powerful billing support functionality called “Authentication,Authorization, and Accounting.” This feature (also known as AAA) employs acombination of command routines designed to create a flexible, efficient, and securebilling environment. For example, when a subscriber logs into the system, theirunique MAC address is placed into an authorization table. The system thenauthenticates the subscriber’s MAC address and billing information before allowingthem to access the Internet and make online purchases.
