Prev

Next

Characteristics and differences between RS485 and RS232 RS232 and RS485 have always been the weak current common interface, but there are a lot of people do not understand the difference between them is not very thorough.   I. overview of RS485   RS-485 serial bus is widely used when the communication distance is tens of meters to thousands of meters. RS-485...

更多文章

What is M2M? As is known to all, besides providing more broadband speed and quality, 5G is characterized by the application of the Internet of things (IoT) from the demand and design stage. In order to adapt to different applications, mobile communication technology with no wiring, high coverage and high reusability has become an important...

更多文章

The similarities and differences between industrial... 1. definition of industrial 4G router and industrial switch   Industrial 4G router:   Industrial 4G router is a network device responsible for path finding. It provides users with communication by finding the least communication from multiple paths in the interconnection network. Industrial 4G router...

更多文章

4g router features of E-lins Technology With the development of new communication technologies and the continuous improvement of network efficiency and function of wireless communication, 4G has been widely used. 4G industrial-grade wireless routers are playing an increasingly important role in the applications of various industries, and the price is getting...

更多文章

E-Lins Industrial router applications Industrial-grade routers as Internet network layer communication equipment application in all walks of life, brought a lot of convenience for our industry. "E-Lins" introduce the application of industrial router scenario analysis.   1 The self-service terminal network   E-lins industrial router networking...

更多文章

twitter

3G/4G路由器合理的设计方案

文章目录 : 产品文章

3G/4G路由器合理的设计方案
本路由器的设计是基于三个模块来实现的,分别为3G模块、WiFi模块和Linux硬件平台,。3G模块的功能是利用运营商的无线数据卡进行PPP拨号,使得路由器能通过运营商网络连接至互联网。WiFi模块的功能是使得无线网卡工作在AP(Access Point)模式,并配置动态主机配置协议的脚本文件,来建立一个2.4 GHz的WiFi无线局域网。Linux硬件平台模块的功能主要有两个方面,一方面要支持无线网卡和无线数据卡的驱动,另一方面要通过嵌入式Linux系统中的iptables数据包过滤系统将无线局域网和3G/4G网络连通。智能终端等设备通过WiFi信道接人到该路由器所提供的无线局域网中,分配到一个IP地址之后,则通过该无线局域网的网关进行数据包的接收和发送,而该网关则通过3G/4G模块上的网络拨号接口来接收和发送数据包至3G/4G 网络,从而实现了该路由器的设计方案。

发表评论

You must be logged in to post a comment.