opnet tutorai for beginners

PSK31方式通信C++编写的原代码,可以通过声音传递数据.-PSK31 way communication C++ Prepared the original code, you can transfer data through the voice.

串口读写 -Serial reading and writing

电力电子电路matlab仿真程序，丰富实用，即学即会。-Matlab power electronic circuit simulation program, rich in practical, that will learn.

Serial communication

用vb6实现与plc通信的Beckhoff实例

VC编写传输文件程序，使用Socket，能够传输任何类型的文件，使用时需要修改IP地址-VC prepared to transfer files, the use of Socket to transfer any type of document, need to revise the use of IP addresses

OPC服务器的lib开发包，可以使用它快速开发出opc server-OPC server lib development kits, can use it to quickly develop server Oligomeric Proanthocyanidins

定义主机正在通讯闪灯信号，定义主机通讯传送握手信号，接收子程序，延时子程序-definition mainframe communications are flashing light signals, definitions mainframe handshake signal transmission, the receiving subroutine, delay subroutine

OPNET仿真实例，有助于初学者的快速学习。-OPNET simulations help beginners learn fast.

软电话 从功能分为：服务器端和客户端 服务器：记录所有客户的信息，对客户的登陆、注销等请求进行响应 客户端：利用UDP协议与服务器和被叫或主叫客户端进行通讯 点对点通讯中的请求和响应消息是通过SIP协议来完成传输的，音频信息（压缩后）是同构RTP协议来完成传输的-Soft phone functionality is divided into: server-side and client-server: a record of all customer information, customer landing, write-offs, such as in response to client requests: the use of UDP protocol with the server and the called or caller client communication point of point communication in the request and response messages through the SIP protocol to complete the transmission, audio information (compressed) is isomorphic RTP protocol to complete the transmission