ITU-T Rec. D.11 (11/1988) SPECIAL TARIFF PRINCIPLES FOR INTERNATIONAL PACKET-SWITCHED PUBLIC DATA COMMUNICATION SERVICES BY MEANS OF THE VIRTUAL CALL FACILITY
Preamble
1 Definition
2 Principles for the application of charges
2.1 Chargeable calls
3 Tariff components
3.2 Network access component
3.3 Network utilization component