Exp	Description: SBC is one of the largest telecommunications companies in the world. SBC offers communications products and services ranging from local and long distance telephone services to wireless communication internet access, High-tech network solutions and data communications. The project was involved in customization and testing of Amdocs VOIP billing system. Various SBC clients for voice over Internet communications use SBC’s Wireless network. SBC is using Amdocs ensemble for billing this clients. Other features and functionality of this billing module which were tested are price plan, billing, ordering, provision and finance.