Information technology. Telecommunications and information exchange between systems. Private integrated services network. Specification, functional model and information flows. Route restriction class additional network feature1 Scope This International Standard specifies the Route Restriction Class additional network feature (ANF RRC), which is applicable to various basic services supported by Private Integrated Services Networks (PISN). Basic services are specified in ISO IEC 11574. ANF RRC permits a Route Access Class (RAC) to be associated with a call to indicate its entitlement to use certain facilities during routeing. Additional network feature specifications are

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