Summary

Recommendation ITU-T D.170 sets out the guidelines for preparing the monthly telephone and telex accounts. In particular, it covers the following issues:

•          General remarks on the preparation of accounts;

•          Supply of directories;

•          Accuracy of traffic data in monthly accounts;

•          Estimation of lost accounting records;

•          Traffic sampling;

•          Queries relating to monthly accounts;

•          Adjustments and refunds;

•          Checks of accounting data;

•          Keeping of vouchers;

•          Settlements of accounts.