一个简单的H.323网络电话应用。

PPP拨号上网协议栈，通过串口编程，实现PPP拨号网络底层协议以及TCP/IP协议，主要用于GPRS，CDMA，电话拨号等通信领域。-PPP dial-up Internet protocol stack, through serial programming, PPP dial-up network to achieve agreement and the underlying TCP/IP protocol, mainly for GPRS, CDMA, such as dial-up telephone communications.

不错的手机资料，可能对有需要的朋友有帮助-Good cell phone information that may need to have a friend help

向西门子PLC的数据块DB写入上位机数据，实现PC与PLC间的通信-Siemens PLC to the data blocks DB write PC data, the realization of PC and PLC communication

题为《基于认证和加密技术的安全多媒体传输方案》的硕士论文，发表于核心刊物，我仔细阅读后转化为了ｗｏｒｄ文档格式。-entitled "based authentication and encryption security multimedia transmission program," Master"s thesis, published in the core publications, I read carefully after conversion to word document formats.

这个是GPS信号生成、捕获与跟踪的matlab源代码，对初学者很有帮助。首先生成C/A码，然后进行频域捕获。利用相干与非相干方法进行跟踪。

rtp document , it is useful for learning rtp-rtp document, it is useful for learning rtp

代码使用eVC4.0调试通过，实现了短信发送，接收的功能。运行环境为wince4.1-EVC4.0 through the use of debug code and achieve the SMS send, receive functions. Runtime environment for wince4.1

这里是 Erlang B 公式执行的源代码。它是在 Matlab 环境中使用。它包括三个功能，可以用于计算交通、 渠道和可能性。它支持超过 500 个频道作为输入。

采用C++ Builder开发的GPS接收程序，串口采用SPCOMM控件，能够从接收的数据中读取时间、经纬度。-with C Builder development of the GPS receiver procedures used SPCOMM Serial control, to receive data from the reading time, longitude and latitude.

　ModBus通讯协议分为RTU协议和ASCII协议，下面就ModBus RTU协议简要介绍如下：-ModBus RTU communication protocol into ASCII protocols and agreements, the following agreement on ModBus RTU briefed as follows :