详细介绍了Modem和PC机之间的通讯原理、方法，以及编程实例

用MODEM拔号的C语言源代码范例-dial-up modem using the C language source code examples

SIM300的详细资料。用户手册和AT指令都有。 希望对你有用。-SIM300 details. User manual and have AT commands. Hope that useful to you.

YModem 的上传协议。 可做C 等相关参考。 -From the YModem agreement. Do C and other related reference.

开发gprs的AT命令文档，-Gprs development of the AT command document,

This documentation of 288LCD modem-This is documentation of 288LCD modem

AT V8指令集-AT V8 instruction set

cSharp使用线程下载支持pda项目 cSharp使用线程下载支持pda项目-support the use of thread c# download pda project c# support the use of threads to download pda project

采用dpsk方式调制的直扩信号 -DPSK modulation methods used Direct Sequence Spread Spectrum Signal

gprs协议栈代码.所谓协议栈就是对信息进行多次封装和解封的过程，以便能够在不同的实体间传送信息。本源代码来自Indian Institute of Technology-gprs protocol stack code. The so-called agreement is the right information Stack several Packaging, and the course was cleared, to the various entities to disseminate information. Source code from the Indian Institute of Technology

gsm模块AT指令代码-gsm AT command module code