本文首先分析了信息服务系统中各种计费模式，然后对计费的工作流程、计费系统的结构以及计费与外界的接口分别作了详细探讨。

This paper first gives all charging modes for information service system, then describes charging workflow, charging system architecture and charging system interface with other systems.

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在计费信息的分析、产生、收集和输出部分的方案设计过程中，详细讨论了各部分的数据结构及其软件功能。

The data structures and software functions are discussed particularly in the process of the scheme design of the analyzing, producing, collecting and output of accounting and billing information.

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阐述了电话计费系统设计方案和特点，详细介绍了该系统软件组成以及各程序模块的设计和功能。

The design plan and characteristics of the telephone billing system are elaborated. Software composition of the system and the design and function of every program module are introduced.

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