SummaryRecommendation 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. |