Norstar ul 824_dr5.pdf - TextFiles.com

10 BenefitsBenefitsSecurityIn the Capabilities section of Administration programming, thereare several ways of protecting your system fromunauthorized access.Class of ServiceClass of Service refers to the capabilities that provides tousers who access the system from the public or private network.The Class of Service includes:lfilters that restrict dialing on the line, andan access package, which defines the set of line pools thatmay be accessed and whether or not the user has access tothe paging feature.The Class of Service that is applied to an incomingremote-access call is determined by:the filters that you apply to the incoming trunk, or bythe Class of Service password that the caller used to gainaccess to the system.In cases where is not applied to incoming calls, the remotecaller can change the Class of Service by dialing the DNand entering a Class of Service password.To program Class of Service passwords, see Administration inthe Programming chapter.Dialing filtersYou can use dialing filters to restrict the numbers that may bedialed on any external line within your system. You mayspecify up to 100 dialing filters for the system. A dialing filterconsists of up to 48 restrictions and their associated exceptions.ModularInstaller Guide