General Charging and Accounting Principles for Supplementary Services Associated with International Telecommunication Services Provided over the Integrated Services Digital Network (ISDN) - Charging and Accounting in International Telecommunication Servic
This Recommendation sets out the general principles for charging and accounting to be applied by Administrations for the provision of supplementary services associated with international telecommunication services provides over the ISDN. These services are defined in the relevant ITU-T Recommendations.