最近大家一起玩彩信，玩的真是不亦乐乎，关于PDU编码的一些知识看标准看的头晕，顺便找个开源的MMSC研究研究：

http://www.mbuni.org/index.shtml

Mbuni is a fully-fledged Free/Open Source Multimedia Messaging Service (MMS) gateway. It includes both core network MMS switching (i.e. MMSC) capabilities as well as messaging gateway (i.e. MMSC infrastructure integration) features, and is suitable for operators and MMS VAS providers.