The monitoring of an international sound-programme transmission for charging purposes is carried out at the terminal ISPC of the international sound-programme link.
ITU-T N.18 SPANISH-1988 Referenced Document
ITU-T D.180 Occasional provision of circuits for international sound- and television-programme transmissions Series D: General Tariff Principles; General tariff principles - International sound-and television-programme transmissions Study Group 3*， 2005-09-01 Update