各种协议RFC文档，主要是通信协议，对于通信协议的研究学习很有帮助-RFC documents of various protocols, communication protocol, communication protocol learning helpful

联通彩信网关协议文档与代码，告诉你怎么通过联通彩信网关给用户下发手机彩信-Unicom MMS Gateway Protocol documentation and code, to tell you how to send via MMS Gateway Unicom MMS users under