A computer system and techniques are disclosed that provide support for the operations of a modern telecommunication services provider. The computer system includes several software modules arranged in layers that are configured to provide services, such as a data access, workflow, and business-management...http://www.google.com.tw/patents/US7882209?utm_source=gb-gplus-share專利 US7882209 - Tiered and modular approach to operational support systems
