SIP: Session Initiation Protocol具体的讲解了rfc2543

利用VB写的多线程通讯工具，可以很好的解决串口通讯数据量巨大时阻塞的问题，而且对学习怎样用vb写多线程有很大的帮助-VB write multi-threaded communication tools, can solve serial data communications at a huge obstruction to the problem, but learning how to use Visual Basic to write multithreaded be of great help

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.

special cdma document2

rs232控制的程序，很好用的，推荐给大家。-RS232 control procedures, very good use, and recommend to everyone.

Digit core phone 源代码-Digit core phone source code

xmodem协议源码实现 -The source of xmoderm protocol

文档主要描述TMS320C5000系列DSP的bootloader技术，讲述了不同的引导方法，对于实际工程应用很有帮助-The main document describes the TMS320C5000 series of DSP

gps mgr-gps manager

基于Pocket PC 利用红外接口与手机通讯的C#程序,可以通过Pocket PC来管理手机-A C# program of Pocket pc communicate with mobile telephone using infrared ray. It can mangage mobile telephone by pocket pc.

基于C51及SL811读写U盘的开发文档资料,包括芯片数据手册,测试命令及测试工具,电路原理图,配合基于C51及SL811读写U盘的源程序C51_SL811_ModeDisk_Program就可以产生完整的U盘读写模块-Based on the C51 and U disk read and write SL811 development documentation, including the chip data sheet, test orders and test tools, circuit schematics, with the SL811 to read and write based on the C51 and U disk C51_SL811_ModeDisk_Program source can produce a complete U-disk read-write Module