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网关和路由器之间的区别 网关是充当转换代理的计算机系统或设备。网关是两个系统之间的转换器,它们使用不同的通信协议,数据格式或语言,甚至是完全不同的体系结构。与简单传达信息的网桥不同,网关重新打包它们收到的信息以满足预期系统的需要。那么网关和路由器之间的区别是什么? 网关和路由器之间的区别如下: 路由器的作用是连接不同的网络并传输信息。根据用途,可分为:接入,企业级,骨干级,太比特,多WAN和3G无线等。 网关 网关可以是路由器,交换机或PC。对于同一网段内的通信,不必涉及网关。只有当主机和非本地网段设备通信时,才需要将所有数据包发送到网关设备,然后通过网关设备转发或路由它们。 路由器是一个网络层系统。一般来说,市场上的路由器分为两类,一类是单协议路由器,另一类是多协议路由器。路由器可以转换数据格式,成为与协议不同的网络互连的必要设备。 网关与路由的关系可以表示为:网关是网络连接的基础,路由是网络连接的桥梁。 路由器使用静态或动态路由来确定网络之间的最短路径。静态路由需要管理员手动设置,动态路由USES协议以动态发现网络之间的路径并确定最短路径。通常,静态路由用于小型网络,动态路由用于大型复杂网络。 现在,路由器集成了网关功能,因此路由器也具有网关功能。 网关和路由器之间的区别 从网关和路由器的定义来看,如果只连接两个网络,则只需要一个网关。 假设只有两个网络:网络A和网络B. 为了使网络A和网络B能够通信,只使用网关连接两个网络,因为只有两个网络,并且不需要确定网络之间的最短路径。 如果需要连接多个网络,为了确保网络的可靠性,需要将网络结构设计为完整网络或部分网络。通过这种方式,网络之间的通信需要两个设备,网关和路由器。由于当前路由器集成了网关的功能,因此只能使用一个设备路由器。

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The difference between a gateway and a router A gateway is a computer system or device that ACTS as a transformation agent. A gateway is a translator between two systems that use different communication protocols, data formats, or languages, or even completely different architectures. Unlike Bridges that simply convey information, gateways repackage the information...

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工业路由器的VPN VPN通常是指虚拟专用网络,它只是在公共网络上建立的专用网络,用于加密通信。 VPN功能是在加密数据包时实现目标地址转换和远程访问。因此,工业VPN路由器非常适合项目的数据传输安全要求。工业路由器是在普通路由器的基础上增加的工业要求,而工业VPN路由器是在工业路由器的基础上增加的VPN功能。为什么工业路由器会设置VPN功能?那么VPN功能的好处是什么? VPN工业路由器 VPNS允许您在复杂的公共网络中工作而无需担心安全性。当然,这也是工业VPN路由器的基本功能; 2.可以解决多台设备同时组网,随时使用VPN功能的问题。登录后不再需要繁琐的操作,并且需要连接每个设备。只要你切换网络,就可以选择使用或不使用VPN功能来达到开箱即用的效果; 3,一些连接设备联网,一些需要使用本地网络,一些使用VPN网络,这样可以错开使用; 4.工业VPN路由器可以连接多个终端和一个账号,不再担心VPN账号会限制连接终端的数量; 工业路由器 5.市场上大多数工业路由器已经支持VPN中的PPTP连接模式,而万无一失的操作设置不再是专家的专利。 VPN在工业,商业和民用领域非常受欢迎。它们可以使网络传输更安全,更专业,更自由。工业VPN路由器的分类工业VPN路由器的常见分类是PPTP,L2TP,IPSEC。最常见的是PPTP协议。如上所述,市场上的大多数工业路由器都具有PPTP安全协议,即点对点隧道协议。使远程用户能够通过拨入ISP,直接连接到Internet或通过其他网络安全地访问企业网络。...

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Why would industrial routers set up VPN capabilities Industrial router is the industrial version added on the basis of ordinary router, while industrial VPN router is the VPN function added on the basis of industrial router. VPN generally refers to a virtual private network, which is simply a private network established on a public network for encrypted communication. VPN...

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告别SIM卡,eSIM时代到来! SIM卡是(Subscriber Identification Module ),也称为用户身份识别卡、智能卡,GSM数字移动电话机必须装上此卡方能使用。 在电脑芯片上存储了数字移动电话客户的信息,加密的密钥以及用户的电话簿等内容,可供GSM网络客户身份进行鉴别,并对客户通话时的语音信息进行加密。 为解决SIM卡槽占用大量手机空间的难题,SIM的尺寸经历了三种变化: 标准卡:尺寸为...

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Wireless M2M Solution for Traffic

Category : 其他

Wireless M2M Solution for Traffic

Smart Traffic is a new type of transportation of information, intelligence and socialization, making use of advanced tech, including information, communication, and control. Car satellite positioning system is quite a good example. GPRS/CDMA network could also be applied to position buses, taxies, trucks, to master the overall situation for monitor and dispatch

Wireless M2M Solution for Financial System

Category : 其他

Wireless M2M Solution for Financial System

POS (Point of Sales) real-time service system is the important base of realizing commercial automation.China’s banks have set up their own systems of cable access to POS systems, but the cable POS machines are always restricted by space and telecommunication lines, which make it hard to achieve the goal that card consumption can be quick and checked at anytime and anyplace. The access way of GPRS wireless POS machines can solve the problem that POS machines can only be used on some fixed occasions, which makes POS machines not restricted by the telecommunication, and now it has been widely accepted by customers, such as, hotels, gas companies, bus companies, highway authorities, banks, distribution centers, passenger ticketing centers, taxation departments, delivery companies, and mobile sales offices, etc.

Wireless M2M Solution for Water Conservancy

Category : 其他

Wireless M2M Solution for Water Conservancy

Hydrological station is a site to collect basic water information, the basis for hydrological work. With basin’s rapid economic growth and population growth, conflict between water supply and demand is more and more prominent.  Real-time hydrological data, collected by hydrological station, is in great demand. The use of digital video surveillance system, to collect data, image, sound, video, improves accuracy. Hydrological stations spread widely and remotely. Thus, it’s impossible to use of wired or fiber communication to delivery data. In contrast, wireless communication wiring is simple, convenient, and the cost is relatively low, saving a lot of investment. E-Lins Router series is a smart choice for hydrological application

Difference in between LTE FDD and TDD?

Category : 其他

What is difference in between LTE FDD & TDD?

In both LTE FDD and LTE TDD, the transmitted signal is organized into subframes of 1 millisecond (ms) duration and 10 subframes constitute a radio frame. Each subframe normally consists of 14 OFDM symbols (12 OFDM symbols in case of the so-called Extended Cyclic Prefi).

Although the frame structure is, in most respects, the same for LTE FDD and LTE TDD, there are some differences between the two, most notably the use of special subframes in TDD. Another difference is the other subframes are allocated either for uplink transmission or for downlink transmission.

In case of FDD operation, there are two carrier frequencies, one for uplink transmission (fUL) and one for downlink transmission (fDL). During each frame, there are consequently 10 uplink subframes and 10 downlink subframes and uplink and downlink transmission can occur simultaneously within a cell.

In case of TDD operation, there is only one single carrier frequency and uplink and downlink transmissions in the cell are always separated in time. As the same carrier frequency is used for uplink and downlink transmission, both the base station and the mobile terminals must switch from transmission to reception and vice versa. Thus, as a subframe is either an uplink subframe or a downlink subframe, the number of subframes per radio frame in each direction is less than 10.

Check further info at www.e-lins.com for 4G LTE info.

Embeded module MC73xx

Category : 其他

AirPrime MC73XX and EM73XX embedded modules deliver high speed, LTE connectivity for integration into smaller, thinner devices. Available in both MC (PCI Express Mini Card) and EM (PCI Express M.2) form factors, these modules feature multi-operator support, allowing PC OEMs to address worldwide markets, and for end-customers to choose or change their network providers without purchasing new devices.

The MC7355 /EM7355 is built for North America, the MC7305 / EM7305 for Europe, and the MC7330 / EM7330 for Japan.

Air Interface LTE
HSPA+
GSM
GPRS
EDGE
CDMA (MC7355 only)
Peak Download Rate 100 Mbps
Peak Upload Rate 50 Mbps
Regulatory Approvals MC/EM7355: FCC, PTCRB, CDG, NCC
MC/EM7305: CE, GCF, NCC
MC/Em7330: JATE/TELEC
Carrier Approvals Planned: AT&T, Verizon, Sprint, Telstra, Vodafone, NTT Docomo
USB USB 2.0 High Speed
Flash LED Output Yes
SIM Interface 1.8V or 3V
Antenna Diversity Yes
Location Solution A-GPS
GPS XTRA
Glonass
Standalone GPS
Management Services No
Host OS Compatibility Windows 8
Windows 7
Linux
Device Dimensions MC: 51 x 30 x 2.75mm
EM: 42 x 30 x 2.3mm
Temperature Range -25°C to +60°C

Version for Industrial Class Cellular Mobile Modem

Category : 其他

Nowadays wireless mobile modem and serial to gateway modem become an important part of wireless M2M system.

Mobile Modems contain different version.

1. GPRS Modem – Back compatible to GSM

2. EDGE Modem – Back compatible to GPRS/GSM

3. CDMA Modem – Back compatible

4. HSDPA Modem – Back compatible to EDGE/GPRS/GSM

5. HSUPA Modem – Back compatible to HSDP/EDGE/GPRS/GSM

6. HSPA Modem – Back compatible to HSUPA/HSDPA/EDGE/GPRS/GSM

7. HSPA+ Modem – Back compatible to HSPA/HSUPA/HSDP/EDG/GPRS/GSM

8. EV-DO Modem – Back compatible to CDMA1x

9. 4G LTE modem – Back compatible to 3G/2G

Interface: RS232 or USB or RS485 or RS422 or TTL

Speed and bandwidth of networks

Category : 其他

As we know, there are different types of networks for mobile networks.  Here we list the speed to compare,

GPRS Downlink 85.6 kbps, Uplink 42.8 kbps
CDMA Downlink/Uplink 153.6kbps
EDGE Downlink 236.8 kbps, Uplink 118 kbps
UMTS Downlink/Uplink 384 kbps
HSDPA Downlink 7.2 Mbps, Uplink 384k bps
HSUPA Downlink 7.2Mbps, Uplink 5.76Mbps
HSPA+ Downlink 21/42Mbps, Uplink 5.76Mbps
EVDO Rev0 2.4Mbps downlink, 153.6kbps uplink
EVDO RevA 3.1Mbps downlink, 2.4Mbps uplink
EVDO RevB 14.7Mbps downlink, 5.4Mbps uplink
TD-SCDMA 2.8Mbps
4G LTE 100Mbps downlink, 50Mbps uplink

Mobile Data Networks Understanding 2.5G vs 3G vs 4G

Category : 其他

Real 4G comes? Let’s understand what real 4g and fake 4g.

Some people call HSPA+ as 4G, actually there is a real definition of 4G networks.

Ever since Some carriers launched their HSPA+ 4G data services in some countries a lot of people have been saying “it’s not ‘real’ 4G”. But what is ‘real’ 4G anyway? Who decides what 4G ‘is’? Let’s look at the mobile networks that have been deployed, from GPRS 2G to 4G HSPA+.

Just to answer the question of who controls the classification “4G” – the International Telecommunications Union (ITU), a body created under the United Nations regulates the global telecommunications industry. One of the core mandates of the ITU is to establish worldwide telecommunications standards, and they determine the official classification (2G/3G/4G) of mobile data networks such as GPRS, EDGE, HSPA+, WiMAX, etc.

The Best Wireless Router for Industrial

Category : 其他

Buying the right wireless router is a real task, sometimes. With the new 802.11ac standard floating around in the wings, and a seeming endless line of variations in routers, which one is best for you? I think it is E-lins H685 Industrial router.
industrial router
As far as security, you’ll find WEP, WPA, WPA2, and WPA2-Enterprise protecting your network with everything backed up by a Qualcomm chipset.Four band,High speed! Support VPN: PPTP, L2TP, IPSec, GRE, Tunnel (PPTP client, L2TP client, IPSec client, IPsec server),Support RS232 or RS485 port.Welcome to our website to know more!

4 reasons why 4G hasn’t scale up in India

Category : 其他

4 reasons why 4G hasn’t scale up in India
One,Challenges for deploying 2300 MHz TD-LTE: The spectrum band licensed for BWA in India (TD-LTE on 2,300 MHz) has only been deployed in around 20 countries including Hong Kong, Australia and South Africa; the band lacks ecosystem support, device choices and network scale. Of the overall 1,000 devices launched by manufacturers for LTE, only 100 are suitable for the mode licensed in India. As a result, Indian operators have had to consider offering LTE services to a Wi-Fi router which in turn connects Wi-Fi-ready devices. The band is also weaker in offering in-building coverage compared to other modes of LTE.
Two, Better backhaul: Backhaul connections currently lack the coverage and quality required to render 4G services effective. Without the backhaul service to carry data at the same speed, the benefit of the 100 mbps connectivity offered by 4G cannot be realised by the end user. Over the last few years, Indian operators have invested heavily in rolling out fibre; we are now beginning to see scale and agreements falling into place.
Three, Combining data with voice: The advantage of offering super-high-speed data connectivity bundled with mobile voice is that the 4G service needn’t have to compete directly with fixed alternatives on price alone. Telecom regulations now allow an entity to hold a universal access licence to offer mobile voice. So, provided the BWA player has access to voice spectrum, it can now bundle high speed data and voice together.

Four,Capital constraints: A number of operators have put priority on deploying 3G first, due to capital and management constraints. And, in general, India’s capex to sales ratio has come down to 12-14 percent, while it is 22-25 percent for other emerging Asian countries such as China.