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 telecommu