ITU-T Rec. D.36 (1991) – GENERAL ACCOUNTING PRINCIPLES APPLICABLE TO MESSAGE HANDLING SERVICES
FOREWORD
1 Scope
2 Introduction
3 Service aspects
4 General model for accounting
    4.1 General definition
    4.2 Presentation of the model
5 Principles for accounting
    5.1 Assumptions
    5.2 General principles
    5.3 Accounting for specific cost elements
    5.4 Service specific principles
        5.4.1 Optional user facilities
        5.4.2 Delivery to a user agent (UA) belonging to an ADMD
        5.4.3 Transfer to a private management domain (PRMD)
        5.4.4 Telex delivery
        5.4.5 Fax delivery
        5.4.6 Physical delivery
        5.4.7 Teletex delivery
        5.4.8 Transit
        5.4.9 Non-delivery notifications
6 Accounting formulae for services
    6.0 General
    6.1 Delivery to UAs and transfer to PRMDs
    6.2 Deliveries made via access units
        6.2.1 General
        6.2.2 Accounting methods
    6.3 Time as an element in accounting
7 Settlements
ANNEX A – Abbreviations
ANNEX B – Glossary
B.1 destination ADMD
B.2 octet
B.3 originating ADMD
B.4 OSI layers
B.5 component rates
B.6 total outpayment
ANNEX C – Account statement
ANNEX D – Example account
D.1 Direct terminal route: USA (A) to UK (B)
D.2 Indirect terminal route: Japan (A) to UK (B) via USA (A)
D.3 Transit route: USA (A) to France (C) via UK (B)
D.4 Direct terminal route: USA (A) to UK (B)