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The advantage of using wireless data transmission module... Data transmission can be simply divided into two major types: wired (including the installation of optical cables, cables or leased telecommunication lines) and wireless (including the establishment of dedicated wireless data transmission system or the borrowing of CDPD, GSM, CDMA and other public network information platforms).     In...

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Industrial-grade 4G router TCP/IP network architecture 1. Layering of TCP/IP network system   TCP/IP (TransmissionControlProtocol/InternetProtocol), transmission control protocol/Internet protocol. It was developed by the defense advanced research projects agency in the 1970s, and was later integrated into UNIX and popularized. It emerged in the 1980s as the Internet's...

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The structure of 4G DTU The main function of DTU is to transmit data from remote devices back to the background center via wired/wireless. Different data transmission modes of DTU include all-network-connected DTU, GPRS DTU, WIFI DTU, CAN DTU and 4G DTU. Today, we will have a look at the structure and work flow of DTU.   To complete...

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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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关于全网通工业路由器Dampening的原理

Category : 产品文章

•为了防止路由频繁抖动。BGP利用Dampening机制,将这种频繁抖动的工业路由器路由有条件的加以抑制。

•增强了路由的稳定性,但不牺牲表现良好的(well-behaved)全网工业路由器路由的收敛时间。

•BGP默认不启用Dampening,需要手一启用。

•Dampening仅对EBGP邻居传来的路由起效。

•Dampening的原理:

当在工业路由器上启用Dampening后,如果有一条路由up->down,工业无线路由器会对这条路由记录一个惩罚值,每down一次,惩罚值加1000,当惩罚值达到start suppress(开始抑制)值时,这条频繁抖动的工业级无线路由器路由被抑制。一条被抑制的路由不会被使用,也不会传递。

Dampening为每一条前缀维护了一个全网通路由器路由抖动的历史记录。

Dampening算法包含以下几个参数:【4g路由器

• 历史记录――――当一条路由flaping后,改路由就会被分配一个惩罚值,并且它的惩罚状态被设置为history。

• 惩罚值(penalty)――――路由每flaping一次,这个惩罚值就会增加。默认的路由flaping惩罚值为1000。如果只有路由属性发生了变化,那么惩罚值为500。这个值是硬件编码的。

• 抑制门限(suppress limit)――――如果惩罚值超过了抑制门限,改路由将被惩罚或dampen。全网通工业路由器路由状态将由history转变为damp状态。默认值的抑制门限是2000,它可以被设置。

• 惩罚状态(damp state)――――当路由处于惩罚状态时,工业4G路由器在最佳路径选择中将不考虑这条路径,因此也不会把这条前缀通告给它的对等体。

• 半衰期(half life)――――在一半的生命周期的时间内,工业级全网通路由器路由的惩罚值将被减少,半衰期的缺省值是15分钟。路由的惩罚值每5秒钟减少一次。半衰期的值可以被设置。

• 重用门限(reuse limit)――――路由的惩罚值不断的递减。当惩罚值降到重用门限以下时,改路由将不再被抑制。缺省的重用门限为750。工业级4G路由器每10秒钟检查一次那些不需要被抑制的前缀。重用门限时可以被配置的。当惩罚值达到了重用门限的一半时,这条前缀的历史记录(history)将被清除,以便更有效率的使用内存。

• 最大抑制门限/最大抑制时间――――如果路由在短时间内表现出极端的不稳定性,然后又稳定下来,那么累计的惩罚值可能会导致这条工业LTE路由器路由在过长的时间里一直处于惩罚状态。这就是设置最大抑制门限的基本目的。如果工业级LTE路由器路由表现出连续的不稳定性,那么惩罚值就停留在它的上限上,使得路由保持在惩罚状态。最大抑制门限是用公式计算出来的。最大抑制时间为一条路由停留在惩罚状态的最长时间。默认为60分钟(半衰期的4倍)可以配置。

• 最大抑制门限=重用门限×2(最大抑制时间÷半衰期) 由于最大抑制门限为公式算出来的,所以有可能最大抑制门限≤抑制门限,当这种情况发生时,dampening的设置是没有效果的。如重用门限=750,抑制门限=3000,半衰期=30分钟,最大抑制时间=60分钟。按照这样的工业全网通路由器配置,算出来的最大抑制门限为3000,与抑制门限一样,因为必须超过抑制门限,才能对路由进行dampening,所以这时dampening的设置没有效果。

全网4g通路由器】被抑制的全网工业级路由器路由不会传给本地,也不会传给其他EBGP邻居

•Half-life Time : 15 m 半衰期(一个半衰期降为原来的一半)

•Reuse     : 750 降到这个值以下,重新开始启用路由

•Start Suppress : 2000 升到这个值以上,开始抑制

•Max Suppress Time : 60 m (4×15) 最大抑制时间

了解工业级路由器Classless与Classful路由协议

Category : 产品文章

大家都非常清楚,可以将一个IP网段划分成多个子网,子网的掩码可以是任意位数,比如将一个10.0.0.0/8的大网划分出10.1.1.0/24,10.1.2.0/24,10.1.3.0/24等等,划分出来的更小的网络叫做子网,而原来的大网络叫主网,也称为主类网络,A类地址掩码必须为8位才是主类网络,B类地址掩码必须为16位才是主类网络,C类地址掩码必须为24位才是主类网络。

无论是主网还是子网,都会被工业路由器放入路由表,只是某些工业LTE路由器路由协议不能精确传递子网而已,但只要路由协议传递了子网和掩码,工业级路由器就一定会将其放入路由表中。

支持子网的功能被称为Classless,支持Classless可以与子网很好的协作,如果不支持子网,则被称为Classful,所以,一个路由协议是工作在Classless还是Classful,直接关系到全网路由器路由信息中是否存在精确的子网信息,如RIP和EIGRP,并且这些功能可以在协议中手工开启或关闭。4g DTU

路由协议有Classless与Classful的说法,而IOS本身也有运行在Classless还是Classful的说法,IOS是工作在Classless还是Classful,并不影响路由表中是否有子网条目,也就是说,IOS工作在Classless还是Classful,并不影响工业3G路由器路由表的建立,工业级LTE路由器路由表不会有任何区别,但是,Classless与Classful会决定工业无线路由器转发数据包的进程,影响如下:

对于某个主类网络,如10.0.0.0/8,当工业全网通路由器路由表中存在其中部分子网,如10.1.1.0/24和10.1.2.0/24,当工作在Classless时,对于已经知道的子网,工业级无线路由器会将数据包精确地发送到相应出口,而对于并不知道的子网和其它所有未知目标网络,如10.1.3.0/24和30.1.1.0/24,如果存在默认路由的话,工业级4G路由器便将他们全部发送到默认路由所指示的出口;但是当全网通路由器工作在Classful时,工业级全网通路由器知道了子网10.1.1.0/24,就始终会认为其它所有10.0.0.0/8范围内的子网都应该真实存在于网络中,会认为10.1.2.0/24、10.1.3.0/24等等都存在于网络中,只是自己没有详细路由,这时,当路由器收到去往10.1.1.0/24的数据包时,可以正常转发,但是如果收到去往10.1.3.0/24和30.1.1.0/24的数据包,当路由表中存在默认路由时,去往30.1.1.0/24的数据包会被发送到默认工业级3G路由器路由指示的出口,而去往10.0.0.0/8中的未知子网10.1.3.0/24的数据包则被全部丢弃而不走默认路由。

由以上情况可以看出,工业4G路由器工作在Classful时,如果知道了某个主类网络中的部分子网后,其它所有未知子网的数据包将被全部丢弃而不转发,即使存在默认路由,也不会转发,而其它主类网络的数据包还是会正常转发。IOS的Classless与Classful可以通过命令ip classless和no ip classless开启或关闭。

标签:4g路由器   无线路由器

E-Lins CPE and Devices for Wireless M2M

Category : 产品文章

  1. Industrial Class Router for 2G/3G/4G Mobile Cellular networks;

H685 series – single sim

H685m series – single sim

H820 series – single sim

H700 series – dual sim single module

H720 series – dual sim dual module

 

2.  Industrial Class Modem for 2G/3G/4G Mobile Cellular networks;

M300 series

M400 series

 

3.  Wireless Backhaul AP & CPE

WAP100 series

WAP200 series

WAP300 series

E-lins launches New LTE Cellular Router

Category : 产品文章

E-Lins is based on the M2M field (Machine to Machine,Man to Machine), developed full expansion of 4G/3G & 2G mobile cellular device.We has introduced the H820t router.the latest addition to its range of LTE cellular routers. This VPN router’s integrated LTE/HSPA+ modem uses cellular networking for broadband Internet connectivity (up to 100 Mbps download and 50 Mbps upload). The integrated 802.11n wireless LAN radio module provides completely wireless local networking at 450 Mbps. This device also supports Power over Ethernet as per 802.11at. With five VPN channels as standard (optionally 25), the H820t 4G operates as a central IPSec VPN gateway offering highly secure AES encryption and digital-certificate support. H820t have five Ethernet interfaces,which can also be used to connect to external ADSL or VDSL modems and complies with the IEEE 802.11agn standard and operates in the 2.4- or 5-GHz band.its own settings for DHCP, DNS, routing and firewall.

The Best Wi-fi Router

Category : 产品文章, 伊林思产品FAQ

E-lins H820 Dual Band Wireless Router

E-lins wireless router offers excellent Wi-Fi performance and ease of use at a low cost. H820 upports 802.11ac and offers super performance. It comes with a nice mobile-app-enabled Web interface that’s easy to use.and lots of features for industry and businesses.

The latest Wi-Fi standard, 802.11ac, has been greatly anticipated thanks to the much faster speeds it supports. Everyone can benefit from a good 802.11ac router because they all support the current Wireless-N standard too. try one of these 802.11ac routers that are here now.

 

E-lins Industrial router Offer Safe and Stable Wireless Data Transmission

Category : 产品文章, 伊林思产品FAQ

E-lins H700 Industrial router Offer Safe and Stable Wireless Data Transmission.
Nowadays, 3G internet service has become a basic demand. And the 4G LTE, which offers a faster internet service, is the following mainstream. LTE(Long Term Evolution)is the standard for wireless communication of high-speed data transmission, it’s also the evolution of GSM/EDGE and UMTS/HSPA. LTE can highly enhance the performance of transmission capability and network speed. America now is the leading country of using LTE service, which is available in 486 cities. Providing the high-bandwidth transmission is one of the LTE advantages, it fully meets the requirements of high-speed telecommunication. LTE also benefits in data transmission of the high-speed railway application. Moreover, it can be fully implemented in highway utilization, station side/on-board surveillance, real-time voice and video transmission, mobile internet, aero-applications, etc. Wireless routers are widely applied to the Intelligent City System: electricity distribution system, the wireless data transmission of surveillance system, water treatment plant monitor and control system, highway bridge prier monitor system, bank service, and etc.

For the large requirement in the market,E-lins technology is pleased to release this industrial grade router series with 3G and 4G LTE.two sets of SIM cards, while one SIM card malfunctioned, the other one can immediately turns on its back up function and lower the risk of data lost or fail transmission.

World’s fastest 4g router in E-lins

Category : 产品文章, 技术相关

E-lins 4G LTE router speed: Max. 100Mbps downlink, 50Mbps uplink
E-lins’s latest network upgrade, ‘LTE Advanced’ (built by Sierra FDD and ZTE TDD),‘LTE Advance’ uses a technology called ‘carrier aggregation’ which allows mobile signals to be carried across different spectrum simultaneously. Currently, access to E-lins’s Advanced network, which will be rolled out commercially beyond Tech City early next year.
The new network we’re switching on in Tech City uses the spectrum that we acquired in the Ofcom spectrum auction earlier this year, and is the first part of an infrastructure that can meet the future demands of an increasingly data-hungry nation.

E-lins Secure Broadband 4g Router and Gateway for Remote Monitoring

Category : 产品文章, 伊林思产品FAQ

E-lins H685 is built for security, speed, reliability and versatility to meet the ever-changing needs of fixed and mobile enterprise broadband M2M applications. With a high performance, yet low-power, embedded processor, the H685 is an adaptable and economical platform for 3G and 4G broadband routing and cellular gateway functions. The H685 product line features an open Linux operating system, user programmable applications, four power management sleep modes and both high-speed and digital physical interface options.

The H685′s a leading provider of wireless products, services and solutions, announced today its newest enterprise data product, a high-speed broadband router and gateway messaging unit that provides reliable and secure 3G and 4G network connectivity for 24/7 always-on operation of remote-fixed and mobile machine-to-machine (M2M) deployments. Welcome to our website learn more!

New 4G M2M Router

Category : 产品文章, 伊林思产品FAQ

E-lins H685t is a new 4G/LTE router with wifi,built on components that meet industrial requirements , with a low price but with unlimited features.The router can be mounted on a DIN rail with a separate bracket . It is powered by 12 VDC and has a rich support for different LTE bands, it can communicate via LTE at 800, 900 , 1800, 1900 , 2100 and 2600 MHz. Is not 4G on the spot then transferred router to 3G and then 2G. As for 4G so the router has a theoretical maximum speed of 100 Mbit / s download speed and 50 Mbit / s upload speed , but also for 3G offers the great performance by up to 42 Mbit / s download speed and 5.7 Mbit / s upload speed.

In order to reach these speeds , use of dual external antennas , three antennas included in the package , two for 4G and one for wifi. Because the router has an antenna plug of SMA type antenna can be replaced with more powerful antennas , which can be an advantage in such fixed installations.

Dual Sim 4G Router for Japan

Category : 产品文章, 伊林思产品FAQ

Series: H750 Router (industrial grade, dual sim one modem, LAN RJ45*3+WAN RJ45*1, option: RS232/RS485); One sim work online, the other standby, switch freely, cold standby failure backup each other
Detailed spec link1: http://www.szelins.com/download/H750_Datasheet_Eng.pdf
Detailed spec link2: http://www.e-lins.com/EN/download/H750_Datasheet_Eng.pdf
VPN(PPTP, L2TP, IPsec, GRE), SNMP; DDNS, DHCP, NAT/NAPT, Web, Auto-dial, always online, watch-dog, POE(Option);
Cellular/WAN RJ45/WiFi Client supports cold failover;
Option feature:
1) WiFi 802.11b/g/n (working as AP, Bridge Repeater, client)
2) GPS
3) Serial port for DTU feature (Serial to Cellular Gateway), RS232 or RS485 to select one
4) DC input 5V~50V (default is DC5V-40V)
5) dynamic route (D-route) for RIP, OSPF, BGP, Zebra
6) Internal battery 8000mAH (Model name is H700)

UMTS/HSPA/HSUPA/HSPA/HSPA+/DC-HSPA+ (WCDMA/FDD): 850/1900/2100 MHz, option for 850/900/1900/2100Mhz/1700Mhz/AWS;

3G TD-SCDMA: 2010~2025MHz/1880~1920MHz

 

Quad-band EGSM 850/900/1800/1900;

 

CDMA1x/EVDO: 800/1900Mhz, option for 450Mhz;

Cellular Band Supported.

4G FDD LTE:

Band 1–2100Mhz

Band 2–1900Mhz

Band 3–1800Mhz

Band 4—AWS(1700/2100Mhz)

Band 5–850Mhz

Band 7–2600MHz

Band 8–900Mhz

Band 12–700Mhz

Band 13–700(B13)Mhz

Band 17–700(B17)/AWS

Band 19—800Mhz

Band 20–DD800Mhz

Band 21

Band 25 –1900Mhz G Block

Band 28 – 700Mhz

Band 31– 450Mhz
Other FDD band…

4G TDD LTE (TD-LTE):

Band 41 – 2500/2600Mhz

Band 40 — 2300Mhz

Band 39 – 1900Mhz

Band 38 — 2600Mhz

Other TDD band…

Notes: 4G LTE is new. There are many different band and frequencies. Please confirm the detailed band and frequency with your carriers before order.