Liang-Chang Yu, Tai-Liang Chen, Wei-Zu Yang. The implementation of prepaid services over the SIP-based VoIP network. In ITRE 2005 - 3rd International Conference on Information Technology: Research and Education, June 27-30 2005, Hsinchu, Taiwan, Proceedings. pages 151-155, IEEE, 2005. [doi]
Abstract is missing.