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What are the wireless connection technologies of the... Internet of things (iot) applications have been deeply rooted in our lives. The E-Lins H685 industrial-grade router is a small industrial-grade wireless router with single or double LAN ports. TDD/ fdd-lte, 4G, 3G, GPRS network optional. Besides, what are the wireless connectivity technologies for the Internet of things?   1....

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The use of industrial wireless routers Industrial-grade wireless router adopts high performance 32-bit industrial-grade ARM9 communication processor, which is widely used in finance, electric power, postal, water conservancy, environmental protection, meteorology and other industries.   Industrial router is mainly used in intelligent transportation,...

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Cascade and stack of industrial-grade 4G routers The most basic star Ethernet architecture, the actual star enterprise network may be much more complex than this. This renaturation is not only reflected in how high-end network equipment, how complex configuration, more importantly, the performance of network switching level is more complex. Industrial routers and firewalls...

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The difference between 4G router and 4G DTU 4G industrial wireless router and 4G DTU are also used for wireless network data transmission of industrial equipment. But there are also significant differences between the two, and the differences between the two are mainly from the appearance of the interface, the use of methods and the application environment.   1....

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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...

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工业4G路由器网络控制能力从哪些方面提高?

文章目录 : 产品文章

  传统工业4G路由器无法同时保证性能和控制功能。控制功能是由一系列规则所提供的,举例来说可能是优先权、拒绝访问或提供记账数据。当数据包进入工业4G路由器时,这些相关的规则也同样作用于数据包。在基于软件的路由器中,这些规则被存储于一个软件数据库内,每个数据包通过时都必须与该数据库进行核对。这正是问题的根源:处理路由功能的微处理器还必须查询数据库,此时数据包不会被发送,因而双卡路由器的转发能力较低。

  新一代交换式工业GPRS路由器不会遇到这种问题,因为查询和控制功能都是在硬件中实现的。交换式路由器性能与控制功能结合起来的关键在于ASIC能够读阅每一数据包内容的多少。

  ASIC能够收集到的关于每一数据包流量的信息越多,可作用于该数据包流的控制水平就越精细。每一次的客户机/服务器对话都会在客户机与服务器之间产生一串数据包。工业级GPRS路由器这些数据包构成的数据流可分别在OSI第二、三或四层进行识别。每层都会提供关于该流的更为详细的信息。管理一个网络的最基本的工作就是控制这些网络流量。在第2层,数据流中的每个数据包通过源站点和目的站点的MAC地址加以识别。在第3层,工业CDMA路由器数据流通过源和目的网络地址被识别,控制数据流的能力仅限于源/目的地址对,如现在市场上的被称为第3层交换机的交换式工业级CDMA路由器。如果一台客户机正在同时使用同一服务器上的多个应用程序,则第3层信息就不会对每一应用程序流作出详细描述,这样就无法为每个数据流逐一实施不同的控制规则了。

  传统全网路由器器都具有阅读第4层报头信息的能力。实际上,传统工业全网通路由器中的大部分高级控制特性都是在第4层上实现的。例如,在基于软件的工业级全网通路由器中,第4层信息被用来建立安全过滤器,这在控制网络流量的过程中是一个重要组成部分。但是对于基于软件的全网通路由器来说,由于前面所述的理由,对数据包的深入阅读将会极大地牺牲性能。的确,在许多基于软件的工业路由器中,当启用安全过滤器时,性能最多可下降70%。

  工业路由器      无线路由器

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