关于数字电视mpeg-2业务信息方面的书，非常详细（差不多是规范翻译过来的），通俗易懂。除了印刷效果一般般外，其他的都还满意。值得工程技术人员参考-on digital TV MPEG-2 business information, the book is very detailed (almost a literal translation norms), accessibly. In addition to the general effect as printing, other are

sipXtapi is a comprehensive client library and software development kit (SDK) for SIP-based user agents. It includes SIP signalling support as well as a media framework. A complete and very feature rich softphone can be built easily by adding a graph

sip开源协议 sip开源协议-sip protocol sip open source open-source agreement

VoIP Softswitch ebook for SI