电信集中计费帐务系统需求说明书，需求描述非常规范非常完整，对从事电信行业的开发人员有很大帮助，一般开发人员也可通过此文档了解真正的需求说明书是如何写的，共185页-Telecom Billing System requirements focus on specification, the demand for a very complete descr iption of a very normative, engaged in the development of the telecommunications industry were of great help to developers in general can also be used in this document to understand the real needs of the manual is how to write