Under the provisions of Recommendation D.174 where the chargeable duration of a reversed charge telephone call is determined in the outgoing country, the details of the call should be transmitted promptly to the distant Administration to enable it to perform customer billing and in certain circumstances (see 4.3/D. 170) initiate international accounting.
ITU-T D.176 SPANISH-1997 history
1997ITU-T D.176 SPANISH-1997 Transmission in encoded form of telephone reversed charge billing and accounting information