E-Lins Technology

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H685f Gigabit 5G Router

Simple product description of H685f 5G router.

The E-Lins H685 series is a compact, Gigabit Ethernet, ruggedized 3G/4G/LTE/5G cellular networking solution designed for mission-critical connectivity in the most challenging environments. It is qualified for M2M (Machine to Machine), IoT (Internet of Things) and In-Vehicle applications. Super mini size suitable for embedding applications.

In addition to the robustness, reliability, security, friendly-using, the H685 is competent to be engineered to protect against extreme temperatures, humidity, shocks, vibrations, dust, reverse polarity, and transient voltage, which is widely used in more than twenty industrial fields, such as CCTV security surveillance, AMR, vehicle, retails, vending machines, power control, water schedule, traffic, oil field, weather forecast, environmental protection, street lamp control, post, bank and many other fields.

What key features H685f supports?

u  Multi-carrier 2G/3G/4G LTE/5G support with SIM card slot;

u  E-SIM is supported;

u  LAN/WAN Gigabit Ethernets * 2

u  Cellular/WAN RJ45/WiFi client failover and Load Balance (Bandwidth link bonding)

u  Supports LTE Advanced with SIM-based auto-carrier selection

u  Cloud-managed (with NMS network management system), TR-069, Web management, SMS, SSH/Telnet/Command, SNMP

u  WiFi (802.11 a/b/g/n, 2.4Ghz)

u  Certified 3G/4G/LTE enterprise/industrial grade internal modems

u  Built-in transient and reverse polarity voltage protection, over-current and over-voltage protection;

u  5-40V DC voltage input range (5-60V DC option), Dual Power Inputs / Power Failover;

u  GPS / GNSS support

u  Serial Port

u  DI/DO port * 4

u  Supports Ethernet (T1, DSL, Cable, MetroE), WiFi as WAN, and Metro WiFi

u  Ruggedized to ensure always-on connectivity

u  Create real-time alerts to monitor uptime

u  Offer secure, guest WiFi to passengers

u  Advanced security, VPN, and stateful firewall to protect sensitive data

u  Robust Metal Case is ruggedized for vibration, shock

u  Desktop, Wall-mount and Din-rail mount of installation

u  External antenna connectors for high gain antennas replacement

u  MIMO supported

 What Typical Topology H685f is used in detailed applications?

 What Detailed features H685f can support?

Main Feature

WAN

Cellular 2G/3G/4G LTE/5G (FDD/TDD)(SA/NSA)

WiFi as WAN

Failover/Failback and  Load Balance (Bandwidth bonding)

Advanced Modem Failure  Check

IP Passthrough

WAN ports support Cell/Static IP/DHCP/PPPoE (on  demand, keep alive, schedule, manual, standby)

LAN

DHCP Server, Client, Relay

DNS and DNS Proxy

DDNS

UPnP

DMZ

Multicast/Multicast Proxy

QoS (DSCP and Priority Queuing)

MAC Address Filtering

VLAN 802.1Q

WiFi

802.11 a/b/g/n/AC

Up to 64 connected devices

WPA2 Enterprise (WiFi)

Hotspot/Captive Portal

SSID-based Priority

VPN  AND ROUTING

IPsec Tunnel, PPTP, L2TP, GRE Tunnel, OpenVPN  (option), DMVPN (option);

OSPF/BGP/RIP, Virtual Server/Port Forwarding, IPv6  (option), VRRP;

MANAGEMENT

E-Lins Enterprise Cloud Network Management System  (NMS)

Web UI, API, CLI/SSH/Telnet

Data Usage Alerts (router and per client)

Advanced Troubleshooting (support)

Device Alerts

SNMP

SMS control

TR-069

SECURITY

RADIUS and TACACS+ support

802.1x authentication for Ethernet

Certificate support

ALGs

MAC Address Filtering

Advanced Security Mode (local user management  only)

Per-Client Web Filtering

IP Filtering

Content Filtering (basic)

Website Filtering

Zone-Based Object Firewall with host address (IP  or FQDN), port, and mac address

Other Details: NAT, SPI, port blocking, service  filtering (FTP, SMTP, HTTP, RPL, SNMP, DNS, ICMP, NNTP, POP3, SSH), protocol  filtering, WAN ping (allow/ignore)

OPTIMIZED IP COMMUNICATIONS

Automated WAN Failover/Failback support

WAN Affinity and QoS allow prioritization of VoIP  services

Advanced VPN connectivity options to HQ

SIP ALG and NAT to allow VoIP and UC  communications to traverse firewall

MAC Address Filtering

802.1p/q for LAN QoS segmentation and treatment  of VoIP on LAN

Private Network support (wired and 4G WAN)

Firmware update

support firmware update locally, remotely (LAN,  WiFi and OTA WAN) and NMS (Network Management System) option;

DI/DO (Digital Input and  Output)

4 ports, 0-3.3V. Support status monitor via SMS  and Email;

Option: customers can order E-Lins switch control  board (5-40VDC supported)

Others

Cellular and WiFi MIMO supported;

Syslog (local and remote);

DDNS;

DNS proxy;

Optimized EMC design;

Real-time clock (NTP, support update with defined  hours);

WAN/LAN/Memory statistics;

Local/remote profiles backup and retrieve;

Modbus is supported;

Feature Details

Redundancy and Load  Balancing

Failover/failback with 5G, 4G, 3G, 2G; WAN  failure detection, VRRP;

Auto-dial feature, keep alive link;

LCP, ICMP check;

Built-in watch dog;

Cellular (2G/3G/4G/5G),  RJ45 WAN (xDSL, DHCP, Fixed IP), WiFi client three line redundancy;

Option Feature: Ethernet with rule selection,  advanced load balancing options (round robin, spillover, data usage, rate)

Intelligent  Routing

UPnP, DMZ, virtual server/port forwarding,  routing rules, NAT-less routing, wired or wireless WAN-to-LAN IP passthrough,  route management, per-interface routing, content filtering, IP filtering,  website filtering, per-client Web filtering, local DHCP server, DHCP client,  DHCP relay, DNS, DNS proxy, Split DNS; ALGs: PPTP, SIP, TFTP, FTP, IRC; MAC  address filtering, Dynamic DNS, LAN/WAN affinity, VLAN 802.1Q (coming Q4),  STP, enterprise routing protocols: BGP/OSPF/RIP, multicast proxy support, IP  setting overrides, IPv6 support option;

Management

web-based GUI (local management), optional RADIUS  or TACACS+ username/password; remote WAN web-based management w/ access  control (HTTP, HTTPS); SNMP v1, v2c, & v3; CLI over SSH, SSH to serial,  SSH to telnet; API; one-button firmware upgrade; modem configuration, update,  and management; modem data usage w/ alerts, per-client data usage; custom AT  scripting to modems; SMS; TR-069;

Option: Enterprise Cloud Network Management  System (NMS): cloud-enabled management and application platform  (subscription-based);

VPN

IPsec – Tunnel, NAT-T, and transport modes;  connect to E-Lins, Cradlepoint, Cisco/Linksys, CheckPoint, Watchguard,  Juniper, SonicWall, Adtran and others; Hash (MD5, SHA128, SHA256, SHA384, SHA512),  Cipher (AES, 3DES, DES) , IPSec over L2TP support;

GRE tunneling;

PPTP support;

L2TP, L2TP over IPSec support;

VPN pass-through;

OpenVPN support (option);

DMVPN (option);

Certificate support (option);

multiple networks supported in a single tunnel,  site-to-site dynamic VPN with NHRP; VTI Tunnel support;

SMS,  SMS Control and Alarm

Receive  and Send the SMS;

WAN  Cell APN configuration via SMS;

SMS/Voice  Control and Alarm. SMS or Call to control router to be online, offline, reboot,  signal and status monitor; SMS is default feature, Voice is option;

SMS  text sending and receiving;

If you have cases requires a 5G single sim router, you can consider model H685f; any further details just freely contact with E-Lins Communication Co., Limited.

For more information, please visit E-Lins Technology!

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E-Lins 4G Router Load Balancing Between Dual Sim

Load balancing (Load Balance) is a kind of cluster servers or network equipment technology. Load balancing allocates specific services (such as network services and traffic) to multiple servers or network devices to improve service processing capability and ensure high service availability. The basic concepts of load balancing include real services, real service groups, virtual services, scheduling algorithms, and persistence. Common load balancing scenarios include SLB and link load balancing.

Based on the existing network structure, load balancing provides a cheap and effective method to expand the bandwidth of network devices and servers, increase the throughput, strengthen the network data processing ability, improve the flexibility and availability of the network. Note that a load balancing device is not a basic network device but a performance optimization device. For network applications, load balancing is not necessary at the beginning. When the traffic volume of network applications continues to increase and a single processing unit cannot meet the load demand, the network application traffic bottleneck will occur.

Why do you need load balancing?

Take scenes from our own lives. We often have to go to some crowded places, such as subway stations, train stations, cinemas, banks and so on. Whether buying tickets or queuing for admission, these places will generally set up multiple service points or entrances. In most cases, the nearest entrance will be crowded if there is no one to guide it. The service points or entrances that are far away are much looser. If these queuing people can be well dispersed to each entrance, it will greatly shorten the queuing time. Load balancing acts as a coordinator to evenly distribute requests from these users.

The LB function of the E-Lins router can be used for any two cells, wired WAN or Wi-Fi client. In addition, only dual modem dual sim routers can support Cell and Cell.

E-Lins dual modem dual sim 4G router also supports sim switch. Only one of the two modem works and the other one standby. E-Lins routers also support failover between wan, Wi-Fi, and cells. If LB is enabled, both sim switch and failover must be turned off.

Industrial design of E-Lins router: rail mounting, gold-plated housing, industrial-grade high-speed 4G module.

The industrial router is installed with guide rails, and small holes are reserved on the side to directly hang industrial clips and install them on the guide rails. At the same time, you can also freely combine the mounting ears for installation, which is convenient for fixing equipment and reducing transmission interference; the gold-plated shell improves appearance protection The high-speed industrial-grade 4G module provides corresponding protection for the harsh environment of severe cold and high temperature. At the same time, it is equipped with a 32-bit high-performance processor to transmit high-definition Video, high-definition pictures and other front-end collection information transmission is more high-speed and stable.

For more information, please visit E-Lins Technology!

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How Popular of a Hotspot?

What is hotspot? Nowadays it is very popular in life and industrial area. A hotspot is a physical location where people may obtain Internet access, typically using Wi-Fi technology, via a wireless local area network (WLAN) using a router connected to an internet service provider.

In some projects, an industrial 4g router is required to work as a Wi-Fi hotspot. Industrial router’s performance is very stable while using in many applications.

There are public and private hotspots. Public hotspots may be created by a business for use by customers, such as coffee shops or hotels. Public hotspots are typically created from wireless access points configured to provide Internet access, controlled to some degree by the venue. In its simplest form, venues that have broadband Internet access can create public wireless access by configuring an access point (AP), in conjunction with a router and connecting the AP to the Internet connection. A single wireless router combining these functions may suffice.

Private hotspots may be configured via a smartphone or tablet with a mobile network data plan to allow Internet access to other devices via Bluetooth pairing or if both the hotspot device and the device/s accessing it are connected to the same Wi-Fi network.

People can use a laptop or other suitable portable device to access the wireless connection (usually Wi-Fi) provided. Of the estimated 150 million laptops, 14 million PDAs, and other emerging Wi-Fi devices sold per year for the last few years, most include the Wi-Fi feature.

In the other hand, hotspot also brings some potential security issues in actual usage. Security is a serious concern in connection with public and private hotspots. There are three possible attack scenarios. First, there is the wireless connection between the client and the access point, which needs to be encrypted, so that the connection cannot be eavesdropped or attacked by a man-in-the-middle attack. Second, there is the hotspot itself. The WLAN encryption ends at the interface, then travels its network stack unencrypted and then, third, travels over the wired connection up to the BRAS of the ISP.

Depending upon the set up of a public hotspot, the provider of the hotspot has access to the metadata and content accessed by users of the hotspot. The safest method when accessing the Internet over a hotspot, with unknown security measures, is end-to-end encryption. Examples of strong end-to-end encryption are HTTPS and SSH.

Some hotspots authenticate users; however, this does not prevent users from viewing network traffic using packet sniffers. Some vendors provide a download option that deploys WPA support. This conflicts with enterprise configurations that have solutions specific to their internal WLAN.

Often free hotspots operate in two ways: Using an open public network is the easiest way to create a free hotspot. All that is needed is a Wi-Fi router. Similarly, when users of private wireless routers turn off their authentication requirements, opening their connection, intentionally or not, they permit piggybacking (sharing) by anyone in range.

Closed public networks use a HotSpot Management System to control access to hotspots. This software runs on the router itself or an external computer allowing operators to authorize only specific users to access the Internet. Providers of such hotspots often associate the free access with a menu, membership, or purchase limit. Operators may also limit each user's available bandwidth (upload and download speed) to ensure that everyone gets a good quality service. Often this is done through service-level agreements. There are many detailed applications of commercial hotspot, such as a captive portal/login screen/payment. A payment option using a credit card, iPass, PayPal, A walled garden feature that allows free access to certain sites.

Major airports and business hotels are more likely to charge for service, though most hotels provide free service to guests; and increasingly, small airports and airline lounges offer free service. Retail shops, public venues and offices usually provide a free Wi-Fi SSID for their guests and visitors.

No matter you decide to buy a home-use router or an industrial router, now hotspot feature is basic and it seems that our daily life becomes relay on it.

For more information, please visit E-Lins Technology!

[elinstechnology]

Application of Dual Sim 5G Router in Transformer Monitoring

Transformer is an important and expensive key equipment in power system, which undertakes voltage conversion, electric energy distribution and transfer. The normal operation of transformer is an important guarantee for the safe and reliable economic operation and power supply of power system. Therefore, it is necessary to prevent and reduce the occurrence of transformer failure or accident to the maximum extent.

But because the transformer runs for a long time, it is impossible to avoid faults and accidents completely. Transformer faults and accidents are caused by a variety of reasons, the correct diagnosis and early prediction of the fault, it has more urgent practical and important.

Remote real-time monitoring of transformer operation parameters and status can achieve:

Prolong the service life of the transformer

Implement early fault detection

Help to develop a more reliable maintenance plan

A supplement to conventional experimental methods

Dual sim 5g router is used to build a stable and reliable wireless communication network based on wireless communication operator network, and the transformer is monitored in real time. Its design idea is: based on the characteristics of gas detection module transformer insulation characteristics of gas in oil concentrations, through CAN bus transfer to the main control module, main control module according to the set to determine whether a transformer fault early warning, and then through the industrial wireless router to transfer data to the monitoring center, so as to realize the function of remote monitoring.

Combining real-time operating system and wireless network technology, applied to the remote monitoring of transformer, online monitoring of the concentration of the dissolved gas in transformer mineral insulating oil, using wireless transmission technology to transfer data to the monitoring center for processing, can greatly improve the stability and safety use of electricity, prevent major accidents, It can effectively solve the problem of unified management and monitoring of power facilities caused by geographical dispersion, relieve the management pressure of users and improve management efficiency.

The industrial wireless router has strong anti-interference ability, and the EMC detection has obtained the third-party certification. With strict lightning protection, overvoltage protection, easy to build a stable and reliable wireless data transmission network within a short period of time, in the field of intelligent power has a wide range of applications, help partners in the field of remote monitoring transformer to create high economic and social benefits.

E-Lins has 2 model of 5g router, H685f and H900f.

From processing chips, communication modules to electronic components, the design and manufacture of the routers adopts high industrial standards, ensuring that the product can operate stably for a long time even in harsh environment without fear of challenges.

Strong metal shell, no fan heat dissipation, IP30 protection, wide temperature and voltage, EMC level 4 or 3, can withstand extreme temperature, voltage instability, high electromagnetic radiation, rain and dust attack and other harsh conditions, to ensure the continuous communication between the remote device and the monitoring center.

For more information, please visit E-Lins Technology!

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Introduction for traffic violation capturing system

The capturing system based on 5G router solves the networking difficulties. For example, it is difficult to pull optical fiber, difficult to check and manage, difficult to construct wired network, and high operating cost.

Urban road traffic safety is an important branch of urban public traffic safety. With the widespread application of motor vehicles, all kinds of illegal incidents related to motor vehicles begin to breed and spread, and the derived road traffic safety problems are increasingly becoming an important constraint factor in social and economic development.

Collection, statistics and analysis of road traffic accidents, it is found that most of the traffic accidents are caused by motor vehicles running illegally, especially in the intersection or sections of the accident caused by motor vehicles running red light accounted for the largest proportion.

The construction of an automatic record system for running red lights, continuous automatic detection and recording of motor vehicles running red lights, and punishment of motor vehicles running red lights through legislation are important means to curb motor vehicles running red lights, thus improving the urban road traffic environment and enhancing the safety factor of public travel.

At present, there are some pain points in the industry, for example, the distance between the optical fiber is long, which is not suitable for pulling. ; The number is large and the troubleshooting management is difficult. ; It is difficult to construct the wired network and the operation cost is high.

The capturing system is mainly composed of capturing machine and light supplement lamp. The capturing machine is connected with 4G/5G wireless routing of East Use Technology through network cable, and the captured pictures are transmitted to the traffic police department in real time through wireless network. The traffic police system monitors and manages all the capturing points on the scene through network.

The system consists of three parts:

Front end: the front end intelligent capturing system is mainly composed of hd cameras set up at the scene.

Communication: Consisting of 5G router modems, images captured at the scene are sent to the traffic police system through high-speed 4G/5G wireless network through 5G devices.

Background: the traffic police system will sort out and analyze the pictures sent back from the scene, and deal with the corresponding violations accordingly.

The system features and advantages: solve the networking problem, not constrained by geographical conditions. ; Manage and monitor onsite devices in a unified manner through wireless. ; Wireless wiring, low operating costs. ; High specification industrial design, cold and high temperature resistance, stable and reliable.

Nowadays, E-Lins 5G router H900f and H68f are available. They can work in many areas globly with simply just a sim card.

They support multiple working modes such as WIFI AP, AP Client, repeater, repeater bridge and WDS (optional); VPN like IPsec, PPTP, L2TP are also supported.

For more information, please visit E-Lins Technology!

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How to choose a suitable 4G cellular router

4G cellular connections are widely being used by businesses to connect their sites to the internet or to other sites on their Wide Area Network (WAN). Using 4G can be very useful if you need sites connected fast, or in remote places, or perhaps for backup or disaster recovery scenarios. A 4G connection for businesses almost invariably involves the use of a 4G router that contains one or more slots for SIM cards, plus the means to connect cellular aerials and the local area network (LAN) of the site.

There are so many types of 4g routers in market supporting various kinds of features. In order to purchase a suitable 4g router for your application, you should take the time to consider some of the following questions…

What’s the router used for? Not all 4G routers are created equal – so depending whether you’re using a router for business or leisure is going to decide the level of capability you require. One of the big differences to consider from the outset is whether you need a device that’s able to use more than one cellular connection to provide an internet connection. If you’re a business user then the answer here is likely to be a yes – and the feature you’re looking for is referred to as a ‘multi-SIM’ capability. Performance and reliability is the primary reason multi-SIM is appropriate for businesses, If your end users or customers rely on stable and robust communication, then the cost of a slow or intermittent connection might run to far more than inconvenience. 4G routers that use only 1 SIM are targeted at leisure users or business sites with few users for whom performance is less of an issue.

Be Aware Of The Multi-SIM/SIM Failover Difference There’s a big distinction between a router that offers multi-SIM capability and one that offers merely a SIM failover service. If the router you’re looking at has two SIM slots it doesn’t necessarily mean it offers two cellular connections – instead, it might just mean that there’s room for a ‘back up’ sim should the primary cellular connection experience a service issue. Routers that offer true multi-SIM technology combine 2 or more connections – and in some instances can bond 2 or more SIMs to provide a high capacity connection. If you’re not sure how many SIMs will suffice, consider what’s needed for you network applications to run – and check against connection speed of the SIMs you’re planning to use.

Is SIM Bonding Or Load Balancing Right For Your Business? When using more than one SIM, depending on the types of application you’re running, you’ll need to decide whether bonding or load balancing your cellular connections is right for you. If you’re bonding, you’re essentially using the router technology to combine all of your 4G connections into one – whereas with load balancing you’re attributing a single connection to each application or end user. Owing to its stability, many companies favor bonding to increase internet speed – and since it’s unlikely that you’re ever going to be using the full capacity of your connection, any issues with a single connection aren’t noticeable.

Do You Have Priority Applications That Must Run? A lot of businesses have core applications that have to run for service to be provided. It’s not just dropped connections that cause application issues, you might have applications for which a slowed connection can cause problems. This can especially be the case if you have real-time applications. If this is the case for you, looking for a router that offers traffic prioritisation at the point of configuration is a good idea. You’ll be able to make sure mission critical applications continue to run, even if others are slowed or halted.

How Important Is Reporting On Data? Relying on the different carriers to provide accurate information on your data use can sometimes prove taxing – for many this isn’t done as standard, so takes time and effort if you want to get certain figures. If you’re keen on keeping an eye on data use then finding a router with built-in reporting capabilities can be very helpful. In doing so you can compile crucial information on budgets, application use and much more.

Do You Need To Access Your Network Wirelessly? There are a variety of reasons that wireless access to your network can be helpful – the physical setting of your network might require it, guest users might not want to (or be able to) plug an RJ45 cable into their device, printers and other network peripherals might be awkwardly located – and so forth. Not all 4G routers offer a wireless connection – but some do, so if your business could benefit from the flexibility that brings, be sure to check – it’s not always built in.

Will You Be Connecting To Devices That Are Inconvenient To Provide Mains Power To? 4G routers will often be connected to a small switch, a wireless network access point or other low power equipment. When you’re connecting small sites, vehicles and outdoor locations it is sometimes inconvenient to plug all of these into mains power. In these situations, it simplifies the installation if you can power them over an Ethernet cable, using Power Over Ethernet (POE). If you’re in this situation, you might want to consider looking for a router that can provide power to other equipment via Power Over Ethernet. Not essential – but a nice feature to take advantage of if you’ve got the need.

If your cases or projects are used in M2M&IoT fields, E-Lins’ series 4G M2M routers will be good choice for you, maybe you can take a short view of their products from their website.

For more information please visit E-Lins Technology!

[elinstechnology]

5G industrial router works for advertising machine

With the development of urbanization, the scale of the city is getting bigger and bigger. Digital signage and large advertising screens are all over every corner of the city, ranging from large screens on the top of buildings to small billboards on the side of the road.

With the continuous development of modern technology, the application of wireless communication technology and digital display technology is increasing. With the integration of network and multimedia technology, digital signage has been widely used in telecommunications, finance, shopping malls, public places, outdoor billboards and other fields.

It mainly uses modern multimedia technology, wireless communication technology, etc. to connect multiple terminals to the Internet, allowing the data release platform to interact with each terminal in real time, and realize the functions of remote release of new programs, real-time monitoring of terminal status, and multi-point interaction.

The system includes front-end data release terminal, state acquisition terminal, wireless data transmission equipment, platform data release and state monitoring system and other components.

The front-end equipment mainly realizes the real-time release and display of advertisement and other data, and the real-time collection of terminal operation status. The real-time status is collected and transmitted to the platform, and the platform sends various program information to each terminal to realize remote release and monitoring functions.

The wireless communication part mainly uses a wireless 5G mobile router to transmit data through the operator’s 3G/4G/5G wireless network.

The system mainly provides the function of remote real-time release of program data, the function of real-time remote monitoring of each terminal status, and the multi-point interactive function. and other functions.

Through the wireless communication method of 5G router, it is convenient, fast and low cost.

The system has strong capacity expansion.

Industrial-grade transmission equipment, stable and reliable, with low failure rate.

Ignoring distance restrictions, unified management can be performed on terminals across the country.

E-Lins 5G router H900f and H68f are available now. They have excellent firewall function, support IP and MAC address binding, virtual host, port mapping function, content filtering and other functions.

They support multiple working modes such as WIFI AP, AP Client, repeater, repeater bridge and WDS (optional);

As for WIFI, they supports WEP, WPA, WPA2 and other encryption methods, supports RADIUS authentication, MAC address filtering and other functions;

Support a variety of online and offline trigger modes, including SMS, voice phone ringing, serial data, network data triggering, and scheduled online and offline modes; APN/VPDN supported;

E-Lins 5G routers also support multi-channel DHCP server and DHCP client, DHCP binding MAC address, DDNS, firewall, NAT/NAPT port mapping and conversion, DMZ host, QoS, traffic statistics, real-time display of data transmission rate and other functions;

They also have SPI firewall, VPN traversal, access control, URL filtering function, etc.;

Today our products have been widely used in the M2M/IoT industry in the IoT industry chain, such as logistics express cabinets, charging piles, industrial automation, industrial control, earthquake monitoring, meteorological monitoring, telemetry, instrument monitoring, agriculture, forestry , water, coal, petrochemical and other fields.

For more information please visit E-Lins Technology!

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The core skills of 4g wireless industrial router with Ethernet

At present, the market performance of core routers is very good. The system switching capability and processing capability of high-speed core routers are an important manifestation of their ability to be different from general core routers.

At present, the backplane switching capacity of high-speed core routers should reach more than 40Gbps. At the same time, even if the system does not provide OC-192/STM-64 interface temporarily, it must support this interface without upgrading existing interface cards and general components in the future. . In terms of device processing capability, when the system is fully loaded, all interfaces should be able to process short packets at wire speed, such as 40 bytes and 64 bytes, and at the same time, the switching matrix of high-speed core routers should be able to process at wire speed without blocking The exchange of all interfaces, regardless of the type of traffic.

Throughput Throughput is the packet forwarding capability of the core router. Throughput is related to the number of core router ports, port rate, packet length, packet type, routing calculation mode (distributed or centralized), and test method, and generally refers to the ability of the processor to process packets. The packet forwarding capability of the high-speed core router is at least 20Mpps. Throughput mainly includes two aspects: Overall throughput The whole machine refers to the packet forwarding capability of the whole machine, which is an important indicator of the equipment performance. The job of the core router is to select the route according to the IP packet header or MPLS mark, so the performance index refers to the number of forwarded packets per second. The throughput of the whole machine is usually less than the sum of the throughput of all ports of the core router. Port throughput Port throughput refers to the port packet forwarding capability, which is the packet forwarding capability of the core router on a certain port. Usually two test interfaces at the same rate are used. Generally, the test interface may be related to the position and relationship of the interface. For example, the test throughput between ports on the same card may be different from the throughput value between ports on different cards.

Routing Table Capability Core routers usually rely on established and maintained routing tables to determine packet forwarding. Routing table capacity refers to the limit of the number of routing table entries contained in the routing table. Since the core routers that implement BGP on the Internet usually have hundreds of thousands of routing table entries, this item is also an important manifestation of the capabilities of the core routers. In general, high-speed core routers should be able to support at least 250,000 routes, providing at least 2 paths per destination address on average, and the system must support at least 25 BGP peers and at least 50 IGP neighbors.

Backplane Capability Backplane refers to the physical path between input and output ports. The backplane capability is the internal implementation of the core router. The traditional core router uses a shared backplane, but as a high-performance core router, it will inevitably encounter congestion problems. Secondly, it is difficult to design a high-speed shared bus. Therefore, the existing high-speed core routers generally Designed with interchangeable backplanes. The backplane capability can be reflected in the throughput of the core router, and the backplane capability is usually greater than the value calculated based on the throughput and the test packet length. However, the backplane capability can only be reflected in the design, and generally cannot be tested.

Packet loss rate The packet loss rate refers to the proportion of data packets that cannot be forwarded due to lack of resources in the core router under a stable and continuous load in the data packets that should be forwarded. The packet loss rate is usually used to measure the performance of the core router when the core router is overloaded. The packet loss rate is related to the length of the data packet and the frequency of packet sending. In some environments, it can be tested and simulated after adding routing jitter or a large number of routes.

Time delay The delay refers to the time interval from the first bit of the data packet entering the core router to the last bit being output from the core router. This time interval is the processing time of the core router operating in the store-and-forward mode. Latency is related to both packet length and link rate, and is usually tested within the core router port throughput range. Delay has a great impact on network performance. As a high-speed core router, in the worst case, the delay for IP packets of 1518 bytes and below is required to be less than 1ms.

Back-to-back frames The number of back-to-back frames refers to the number of packets when the most packets are sent at the minimum frame interval without causing packet loss. This metric is used to test the core router caching capability. For a core router with wire-speed full-duplex forwarding capability, the value of this indicator is infinite.

Delay jitter Delay jitter refers to delay variation. Data services are not sensitive to delay jitter, so this indicator is usually not an important indicator for measuring high-speed core routers. For services other than data on IP, such as voice and video services, this indicator is only necessary to test.

For more information please visit E-Lins Technology!

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Why need use 4G router

5G is coming, but nowadays 4G is still the main trend worldwide. Why 4G network is so important in nowadays? And what advantages does 4G LTE router owns?

We will look into some of the use cases that 4G routers might be good solutions. We will also highlight some of the potential shortcomings of a 4G router for certain applications. Overall, we would like to dive deep into the aspects that matter when choosing a 4G router. Let’s begin:

4G networks are inherently unpredictable. This means, even though in ideal locations, times and environments, the performance of a 4G modem can be fantastic, there is no guarantee of achieving that result every single time. As a matter of fact, because of the fast-fading, slow-fading, network congestion and many other factors, your performance may vary with only a few second, or within a few millimeters. So it is safe to assume the 4G networks are unpredictable.

The carriers you use make a difference. Some carriers have the largest coverage area, some carriers have the best urban performance, some are better in rural etc. So you should usually expect variation on the performance based on carriers. It is not uncommon to see one carrier outperform one in a certain location at a certain time, while the following day the roles may reverse.

With all these base level factors in mind, let’s investigate what factors and features you should consider in a 4G router:

1) What is your applications?

This is perhaps the most important factor in determining the features you need to look for in a 4G router: how will you be using the 4G router? Is this for a retail store as a back up on an existing primary wired connection (imagine the backup Internet for a POS register)? Is the 4G router going to be used in a specialty vehicle (imagine a police car with surveillance cameras)? Or will you be using the 4G router as an alternative residential Internet access?

If you are considering using a 4G router as a primary Internet connection for every day usage in a residential environment, you are probably a year or two early as the cost of the data has still not gotten to levels where you can replace your wired Internet line with a 4G router. A 4G router should be considered only when you have no other wired Internet options in your house. For this type of simple setups, a 4G router that can house a single wired WAN and a single 4G connection will be a good choice. We recommend 4G router with built-in modems so that you can use an external antenna for best coverage.

2) Do you have an industrial use for the 4G router?

In case your goal is to leverage 4G router in an industrial application, such as a backup connectivity for a branch office, or as a primary connectivity for a mobile or temporary office, then your 4G router needs to support some advanced features including firewall, broadband bonding and application centric optimizations. Ideally, you can have the 4G router capability within your primary router. In this setup your wired line can failover on to a bonded set of 4G connections. Bonding 2 or more 4G wireless connections will provide not only a wider bandwidth and higher throughput, but will also provide self-healing capabilities for the traffic going over 4G networks. Think of it as adding another lane onto your high-way. Compared to a single lane high-way, a 2 lane high-way will always outperform. Broadband Bonding feature will give your cars driving on that highway to dynamically switch lanes, so to speak and therefore shielding network problems, fluctuations and outages from your applications. This naturally brings up our next aspect to consider.

3) Will your 4G router be your primary or failover connectivity

IF your 4G router is going to be carrying your traffic all the time, i.e. will be your primary means of Internet connectivity for your office, specialty vehicle or similar, then we highly recommend 4G routers with more than 2 cellular 4G connections. Going back to our high-way analogy, this will mean a larger capacity highway to carry more cars with ease. For failover only scenarios, where the 4G connections need to keep the connectivity alive for only limited time, having only 2 connections might be enough. We still caution against a single 4G failover for the following reason.

4) Will you benefit from carrier diversity?

In cases where you have single 4G connection in your 4G router, you are essentially putting all your eggs into a single basket and if that basket (i.e. carrier) goes into a trouble state, and that is almost unavoidable in wireless environments, then your failover insurance failed you. For these reasons we suggest at least 2 cellular connectivity at a bare minimum. Increase that number as a function of the mission criticality of your connectivity to the Internet to 3, 4 or beyond.

5) What type of environment will the 4G router be used in?

It is important to have ruggedized 4G router in case you will be using the device in harsh environments. Certain environments may even require their specific certifications, such as installation in trains where certification for train installations is a must have for your 4G router both for performance against temperature range, vibration tolerance etc, as well as for safety reasons.

6) What good to have features do you need?

The 4G router can also have some additional features such as firewall, layer 7 filters, DHCP server, advanced QoS and others. It is important to match these additional features with your requirement list to make sure you are getting the best matching 4G router for the job at hand.

7) What is your return on your investment on your 4G router?

Last but not least, you should look at the investment recovery time, by looking at the savings that the 4G router will provide by eliminating down-time for your business. Depending on the cloud services that your business depend on for business critical applications, in most cases, a 4G router will pay for itself within weeks if not sooner. None-the-less it makes sense to go over that calculation to make sure your investment is a wise one.

For more information, you can freely contact with E-Lins Communication., Limited.

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Functions and Applications Descriptions of 5g Cellular Modem

What is 5G CPE? What are the functions and application scenarios of 5g cellular modem.

5G CPE belongs to a 5G terminal equipment. It picks up 5G signals from carrier base stations and converts them into Wi-Fi or wired signals to connect more local devices -- phones, tablets, computers -- to the Internet. The full name of CPE is Customer Premise Equipment, which the industry likes to call "Customer Terminal Equipment." Premise is the Premise of customer preinstallation. By "front", it means that it always stands "in front" of the user's device. Its role, is the mobile communication signal (4G, 5G, etc.) or wired broadband signal, conversion cost local area network signal, for user equipment use.

The 5G CPES on the market are very similar to the "light cat" features of fiber optic broadband in our homes. In essence, the Light Cat is a type of CPE. The difference between the "Optical Cat" and 5G cellular modem is that the "Optical Cat" connects up to the carrier's fiber-optic access network device, while the 5G CPE connects to a 5G base station.

5G CPE products all use the same or similar 5G chips as 5G phones, have strong 5G connectivity, support SA/NSA networking, and are compatible with 4G/5G signals. In terms of speed, 5G CPE and Light Cat are on a par. But 5G CPE is an enhanced version of the "light cat, the advantage lies in its mobility and flexibility.

It wouldn't be much fun to say that a CPE just boosts a Wi-Fi signal, since Wi-Fi routers can do that, too. Where it's really cool is that it can do secondary relaying of cell phone signals, such as 5G/4G signals. It turns the 5G/4G signals it receives into Wi-Fi signals and feeds them to nearby devices. CPE is used to relay carrier network signals.

Although operators have extensively carried out the layout of 5G base stations so far, and achieved considerable results, industrial data collection places are often located in remote mountainous areas and reservoirs, which makes 5G signal coverage relatively weak and unstable. Through the 5G CPE industrial gateway, the signal is relayed twice to expand the coverage of THE 5G network, so that the monitoring area is covered by the 5G network, which is convenient for data collection and transmission.

In addition to 5G signal relay function, 5G CPE industrial gateway also has the following functions:

With stronger computing power, fast speed, strong function, support edge computing, but also with face recognition and video depth analysis capabilities.

Supports built-in lithium battery power supply and four POE ports to provide stable power for external devices. Unique built-in battery design and power supply capability of peripherals can continuously power the device in case of unexpected power failure.

Industrial grade metal shell, durable and reliable quality; High EMC electromagnetic compatibility, strong electromagnetic environment stable work, through THE EMC level test, to ensure the stability of transmission, super moisture, lightning protection, electromagnetic interference to adapt to all kinds of harsh environment.

Contact us for more info about E-Lins 5G CPE, 5g cellular modem.

Visit E-Lins Technology for more details!

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The Application of 5g Mobile Communication Network

The so-called 5G network refers to the fifth-generation network in the development of mobile communication networks. Compared with the previous four-generation mobile networks, the 5G network shows more enhanced functions in the actual application process, and theoretically its transmission speed can reach tens of gigabytes per second, which is hundreds of times faster than the 4G mobile network. For the 5G network, it shows more obvious advantages and more powerful functions in the actual application process.

5G network belongs to a new type of network, its penetration rate is still relatively low, and further research and development are still needed. For any kind of network, network security issues are very important factors, and the same is true for 5G networks, so 5G network security issues need to be paid more attention. As 5G network researchers, we should strengthen our understanding of 5G network security and pay more attention to actively solve 5G network security problems and grasp its development direction, so as to achieve a more ideal development of 5G network, so that it can be widely used in the future application.

The main application is listed:

(1) High-speed data transmission.

Nowadays, 4G network communication has been widely used in people's daily life and work. 5G network communication is based on this to improve the efficiency of data transmission. The transmission speed reaches 3.6G/s, which not only saves a lot of space, but also improves network communication. Security of Services. At present, the network communication technology is still developing, and the data transmission rate will be greater than 10G/s in the near future. Under this premise, remote control applications will be widely used in people's lives. In addition, the 5G network communication delay is short, about 1ms, which can meet the practical application of remote control with high precision requirements, such as vehicle automatic driving, electronic medical treatment, etc., through the shorter network delay to further improve the remote control of 5G network communication Control the security of the application and continuously improve various functions.

(2) Strengthen network compatibility.

For different networks, compatibility has always been a common problem faced by their development links. Only by solving this problem can the market share of the corresponding technology be greatly increased. It's just that the current situation shows that no network communication technology has good compatibility, and even if there is, there are serious limitations. However, one of the most significant features and advantages of 5G network communication is its strong compatibility, which can meet the normal use of different devices in the application and development of network communication, and effectively integrate networks of different types and stages, greatly increasing the application of 5G network communication. It can realize the compatibility of different network systems at different stages, greatly reduce network maintenance costs, save costs, and obtain maximum economic benefits.

(3) Coordinate and rational planning.

The mobile market is developing rapidly. There are various communication systems in the market. If 5G network communication wants to stand in the fierce market competition, it is necessary to coordinate and rationally plan various network systems, coordinate management of multi-standard networks, and let users in different environments. Get premium service and experience. Although 5G network communication has the advantages of communication technologies such as 3G and 4G, it is necessary to realize the cooperation of multiple networks in order to maximize the advantages of 5G network communication. Therefore, in the process of applying 5G network communication, the central resource manager is used to facilitate users Decoupling from data, optimizing network configuration, and achieving the goal of balancing load.

(4) To meet business needs.

The fundamental goal of the application and development of network communication has always been to meet the needs of users. From the 2G era to the 4G era, people's needs for network communication have become more and more diversified, and network communication technology has also been improved in various aspects. The application of 5G network communication is bound to be It is also necessary to meet user needs, optimize user experience, and achieve full network coverage without dead ends. No matter where users are located, they can enjoy high-quality network communication services, and whether in remote areas or cities, the stability of network communication performance can be ensured. In the future application and development, one of the most important goals of 5G network communication is to achieve the stability and independence of network communication services without being affected by factors such as region and traffic.

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How 4G router helps highway surveillance works efficiently

As a link of video surveillance system, dual sim 4G router can help highway surveillance efficiently and conveniently

Solar power supply system of video monitor as another application of photo voltaic power generation system, because of its access to basic electricity from the set in remote areas of point to point the way of the regional restrictions, compared with the traditional way of power supply cost savings and use of low cost, has been applied to more and more in the construction of expressway electromechanical system.

With the gradual formation of the expressway network, in order to formulate and implement emergency plans, reduce road congestion, prevent traffic accidents and improve the service level, from the perspective of economy, energy saving, environmental protection and shortening the construction period, the customer will build a solar-powered expressway whole-process monitoring system. The system consists of solar array, battery pack, industrial 4G wireless router, solar charge and discharge controller, inverter, transformer, camera and optical terminal machine.

The network transmission layer is composed of field network switching equipment, network lines, station control layer network switching equipment, industrial dual sim 4g router, etc., which provides interconnection and communication of the whole station operation and monitoring equipment. The main function of the industrial 4G router is to transmit various monitoring data from the field equipment layer to the monitoring platform, which provides remote diagnosis, maintenance functions, alarm information and reports in line with the upper management system to realize the integration of management and control.

Highway solar power monitoring system can monitor personnel in the remote control room can see the various types of equipment running status is normal, can be issued in a timely manner through the wireless network parameters to modify equipment operation instruction, to realize automatic traffic incident, accident detection alarm and 24 hours of video, real-time to the operation of each subsystem itself in transmitted to the monitoring center in time, To ensure the normal operation of the whole monitoring system, save labor costs, and achieve higher work efficiency.

E-Lins has IP68 grade outdoor router H820QO, which adopting the latest hardware system platform, using the Linux software system and using the latest technology to develop a brand new, more excellent Internet of Things wireless communication router product. Using industrial design standards, it is mainly used in data transmission services for industry users. H820QO supports IP67/IP68 waterproof and dustproof, suitable for outdoor use, and can optional support dual-band WiFi or tri-band WiFi. IP68 makes it particularly suitable for outdoor unattended areas, such as smart grid, wireless monitoring of car charging piles, remote meter reading wireless networking, automatic wireless monitoring of power distribution network, wireless monitoring of transmission line status, power distribution network solutions, community intelligence Substation networking solutions, charging pile solutions, etc. H820QO supports multiple online and offline trigger modes, including SMS, voice call ringing, serial data, network data trigger, and scheduled online and offline modes; It also support APN/VPDN; VPN client (PPTP, L2TP, IPSEC, GRE, OpenVPN, DMVPN); VPN server (IPSEC, PPTP, L2TP, OpenVPN)

If need more info about IP68 H820QO outdoor router, contact us freely.

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Introduction of DMVPN

Now we hear a word “DMVPN” more and more often, then what is “DMVPN” and what is the advantages DMVPN owning? Here we give a brief introduction of DMVPN.

DMVPN (Dynamic Multipoint VPN) is a routing technique we can use to build a VPN network with multiple sites without having to statically configure all devices. It’s a “hub and spoke” network where the spokes will be able to communicate with each other directly without having to go through the hub. Encryption is supported through IPsec which makes DMVPN a popular choice for connecting different sites using regular Internet connections. It’s a great backup or alternative to private networks like MPLS VPN.

There are 2 important pieces to the DMVPN puzzle:

Multipoint GRE

NHRP (Next Hop Resolution Protocol)

Let me explain these 2 topics…

1.Multipoint GRE

Our “regular” GRE tunnels are point-to-point and don’t scale well. For example, let’s say we have a company network with some sites that we want to connect to each other using regular Internet connections:

Above we have one router that represents the HQ and there are four branch offices. Let’s say that we have the following requirements:

Each branch office has to be connected to the HQ.

Traffic between Branch 1 and Branch 2 has to be tunneled directly.

Traffic between Branch 3 and Branch 4 has to be tunneled directly.

To accomplish this we will have to configure a bunch of GRE tunnels which will look like this:

2.NHRP (Next Hop Resolution Protocol)

We need something that helps our branch1 router figure out what the public IP address is of the branch2 router, we do this with a protocol called NHRP (Next Hop Resolution Protocol). Here’s an explanation of how NHRP works:

One router will be the NHRP server.

All other routers will be NHRP clients.

NHRP clients register themselves with the NHRP server and report their public IP address.

The NHRP server keeps track of all public IP addresses in its  cache.

When one router wants to tunnel something to another router, it will request the NHRP server for the public IP address of the other router.

Since NHRP uses this server and clients model, it makes sense to use a hub and spoke topology for multipoint GRE. Our hub router will be the NHRP server and all other routers will be the spokes.

Here’s an an illustration of how NHRP works with multipoint GRE:

Above we have two spoke routers (NHRP clients) which establish a tunnel to the hub router. Later once we look at the configurations you will see that the destination IP address of the hub router will be statically configured on the spoke routers. The hub router will dynamically accept spoke routers. The routers will use a NHRP registration request message to register their public IP addresses to the hub.

The hub, our NHRP server will create a mapping between the public IP addresses and the IP addresses of the tunnel interfaces.

A few seconds later, spoke1 decides that it wants to send something to spoke2. It needs to figure out the destination public IP address of spoke2 so it will send a NHRP resolution request, asking the Hub router what the public IP address of spoke 2 is.

DMVPN is new tech and we need more time and know well about it. It will become more and more popular in the router’s applications.

E-Lins is also study and developing DMVPN and plan to add this feature in E-Lins’ series routers.

Visit E-Lins Technology for more information.

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Industrial 4g router specification and application

4G router is a high-speed router for the industrial Internet of things. It is compatible with 4G / 3.5g/3gnetworks. With flagship configuration, VPN link, industrial protection and wide temperature design, it can easily establish a high-speed and stable wireless transmission network and provide users with wireless long-distance data transmission function by using public LTE network.

Industrial products have patented technology to maintain system stability to ensure that the equipment is always online; The whole machine adopts metal shell, anti-interference and anti-radiation, and the hardware adopts industrial design; The system is equipped with Watchdog WDT protection and loaded with system monitoring protection SWP (system watch protection); The whole product has passed the European CE certification, the Central Inspection Institute test, the 3000V electric shock test, and all wireless modules have passed the CGD certification or FCC certification or CE certification; After strict design, testing and 10 years of practical application, the product performance is stable and reliable.

Stable and reliable

WDT watchdog design ensures system stability

Complete anti drop mechanism is adopted to ensure that the data terminal is always online

Built in 1.5kV electromagnetic isolation protection for Ethernet interface

RS232 interface has built-in 15kV ESD protection

The SIM / UIM card interface has built-in 15kV ESD protection

The power interface has built-in inverse phase protection and overvoltage protection

Antenna interface lightning protection (optional)

Standard ease of use

Provide standard RS232, Ethernet and WiFi interfaces, which can directly connect serial port equipment, Ethernet equipment and WiFi equipment

Provide standard wired WAN port (support standard PPPoE protocol), which can be directly connected to ADSL equipment

The intelligent data terminal can enter the data transmission state when powered on

Provide powerful central management software to facilitate equipment management (optional)

Easy to use, flexible, multiple working modes

Convenient system configuration and maintenance interface (including local and remote web mode or cli mode)

Support dual link intelligent switching backup function of wireless public network and wired Wan (optional)

Support VPN client (PPTP, L2TP, IPSec and GRE) (Note: only VPN version supports)

It supports mirroring the data of WiFi interface. The mirrored data is sent to the LAN port (one port in lan1, lan2, lan3 and lan4) and does not affect the normal use of the port (optional)

WiFi interface supports WiFi AP, AP client and WDS functions at the same time (optional)

Support a variety of online and offline trigger modes, including SMS, telephone ringing, serial port data and network data trigger online and offline modes

Support APN / VPDN

Support wireless video monitoring and dynamic image transmission

Support DHCP server, DHCP client, DDNS, firewall, NAT, DMZ host and other functions

Support TCP / IP, UDP, Telnet, FTP, HTTP and other perfect network protocols

Application domain editing voice

4G routers have been used in practice, WiFi hotspots, bus WiFi, etc., but others have not been formally applied. The following 3G routers have been used in cases, and the theory is that they can be transferred to 4G routers

Intelligent transportation: 1. High definition electronic bayonet application 2. High definition electronic police application 3. Road wireless video monitoring

Vehicle monitoring: 1. Bus wireless video monitoring 2. Taxi video monitoring 3. Bus video monitoring

Security monitoring: 1. Security wireless mobile detection system 2. Security wireless video monitoring

Industrial monitoring: 1. Site wireless video monitoring 2. Industrial big data transmission 3. Remote crane monitoring and management 4. Elevator remote monitoring

Financial industry: 1. Wireless ATM self-service terminal 2. Coal mine tax monitoring system Wireless POS application

Power industry: 1. Substation 3G video monitoring 2. Transformer remote monitoring management 3. Power line video monitoring

Environmental protection industry: 1. 3G noise monitoring system 2. Pollution source wireless monitoring system 3. Wireless environment monitoring system

Water conservancy industry: 1. Reservoir remote monitoring system 2. Integrated water environment monitoring system

Other industries: 1. Municipal Engineering 2. Petroleum monitoring 3. Agricultural application 4. Wireless WiFi application

Visit E-Lins Technology for more information.

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What is eSIM and how it works?

In the past 30 years, if you wanted to connect a phone or any device to a cellular network you have to insert a physical SIM card. But in nowadays, you have another new option, which is called eSIM.

What is an eSIM? An eSIM is a small chip inside your phone that acts just like a SIM card. It’s not a physical SIM card, so you don’t have to worry about inserting it into your phone or swapping it with other SIMs. To get your eSIM up and running, you simply contact a network that supports eSIMs, and they’ll activate it for you. You can have plans from more than one network stored on your eSIM, but you’ll only be able to use one at a time.  

How do eSIMs work?

Physical SIM has gone from a mini form factor to Micro, to today’s nano SIMs, with eSIMs. We’ll take a look at how it’s possible for the connectivity provided through physical SIMs to move to the digital world of remote eSIM provisioning. But first, we’ll take a quick look at how SIM cards work in general to understand this properly.

SIMs vs eSIMs : Are eSIMs right for you?

Currently, not all devices are installed eSIMs. Since it is a newer technology, and its cost is a bit higher than traditional devices which installed SIMs. Till now only few devices are installed eSIMs and it is still stay at the small stage. Most consumers still choose SIMs meanwhile most devices are still installed SIMs.  

What are the advantages of eSIMs

Some of the main advantages of an eSIMS:

eSIMs give you instant connectivity. No more waiting for a SIM delivery or installing it on the phone. You will be able to get a plan with a few taps.

One phone with many plans. eSIMs let you store as many profiles and plans as you need in one device so you can easily shift between networks. This means you can:

Smaller devices. eSIMs are smaller and don’t need bulky compartments. Those extra millimeters can mean huge gains in thinness for your phone or watch.

Easily to guard eSIM. Users can check the status of eSIM at the platform of eSIM.

Use one number for business and one for personal calls on the same phone

Add a local data plan that starts working from the moment you land when you are outside of the country without switching SIMs.

Have a separate voice, text, and data plans.

What are the disadvantages of eSIMs?

As much as we like eSIMs, and believe this is the way of the future, there are definitely some disadvantages that we have to face:

eSIM won’t work on older phones. Older phone models most probably do not have eSIMs, and you may have to pay a bit more for a newer model. Check out the list of all eSIM compatible devices here.

Data is more difficult to transfer. A physical SIM could store some contact details for you that would move with it as you switched it from one phone to another. With eSIMs, you will have to download and reupload that data.

What are the typical application of eSIM?

Infact all traditional SIMs installed can support eSIM if they are upgraded hardware to meet eSIMs. From cellphone to cellular routers, modems, DVR, cameras, etc.

If you are interested in a eSIM based router, you can visit www.e-lins.com to get more information for this.

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The difference between 4G industrial routers and related products

Industrial 4G routers are mainly used in environments such as industry, power, environmental protection, and smart cities. They can be used in station vending machines, bank numbering machines, parking gates, community express cabinets, etc. It can be seen that industrial 4g routers are commonly used in public areas or factory production lines. So what are the connections and differences between it and ordinary home routers, industrial modems and switches?

The difference between industrial 4g router and 4g router

Similarity: Both are routers and both have routing functions. Both have WAN port, LAN port, 4G signal, SIM card slot. The 4G tariff of the SIM card reflects the 4G signal of the network, and then the wifi signal is sent through the routing function to realize the network of other devices through the wifi signal. Technically speaking, the route is automatically selected and set according to the signal, and the signal is sent in order.

Difference: The application environment is different. Ordinary routers are mainly used in home or small business office environments, with relatively stable working conditions. Industrial 4g routers can be used in relatively harsh environments such as underground, dams, oil fields or seaside. Therefore, it must have hardware protection such as power supply protection, anti-static, anti-lightning strikes, and at the same time have a 24-hour non-stop hardware watchdog.

The difference between 4g router and 4g modem

Similarity: The similarity between industrial routers and industrial modems is that they are both used in industrial environments. Both have realized the transparent transmission of wireless network data and dial-up networking. They are also devices that meet the network requirements of industrial projects. Usually both have hardware protection to provide a hardware foundation for continuous networking.

Difference: The difference between the two mainly comes from the appearance and actual project application. Industrial 4g routers usually have a WAN port or a LAN port, and some devices also have a serial port, which is suitable for project applications that require a serial port connection, usually with a UI configuration interface. The modem usually has no UI configuration interface, and is small in size and has fewer interfaces. If the interface in the project requires a serial port, it is suitable to use a modem device.

The difference between industrial 4g routers and industrial switches

Similarities: The similarity between industrial 4g routers and switches is that they are both used to implement network data exchange. Only the switch is used for the second layer data exchange of the network data link layer, and the router is used for the third-layer device. Data exchange.

Difference: Industrial routers usually have less than 4 LAN ports, which are used for instrument networking by refracting wifi signals; switch LAN ports are generally less than 48, without a wifi module, and are mainly used to access wired devices. They differ in principle (task hierarchy). The data exchanged by the data exchange layer of the network where the switch is located is relatively simple. When industrial routers carry out data transmission, the protocol is rich, so the division of the broadcast domains of the two is also different.

For more details, please visit https://www.e-lins.com/EN/

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Standards for dividing serial interfaces

The two most basic ways of serial communication: synchronous serial communication and asynchronous serial communication.

Synchronous serial refers to the abbreviation of ISP (interface Serial Peripheral), as the name implies, is the serial peripheral interface. The ISP bus system is a synchronous serial peripheral interface, which enables the MCU to communicate with various peripheral devices in a serial manner to exchange information. TRM450 is an ISP interface.

Asynchronous serial refers to UART (Universal Asynchronous Receiver/Transmitter), universal asynchronous receiving/transmitting. UART is a chip whose parallel input becomes serial output, which is usually integrated on the motherboard. UART includes TTL level serial port and RS232 level serial port. TTL level is 3.3V, while RS232 is negative logic level. It defines +5~+25V as low level and -3~-25V as high level. MDS2710, MDS SD4, EL805, etc. are RS232 interfaces. EL806 has a TTL interface.

The serial interface includes RS-232-C, RS-422, RS485, etc. according to electrical standards and protocols. The RS-232-C, RS-422 and RS-485 standards only specify the electrical characteristics of the interface, and do not involve connectors, cables or protocols.

RS-232 also called standard serial port, the most commonly used serial communication interface. It is a standard for serial communication formulated in 1970 by the Electronic Industries Association (EIA) of the United States in conjunction with Bell Systems, modem manufacturers and computer terminal manufacturers. Its full name is "Technical Standard for Serial Binary Data Exchange Interface Between Data Terminal Equipment (DTE) and Data Communication Equipment (DCE)". The traditional RS-232-C interface standard has 22 wires, using a standard 25-pin D-type plug socket (DB25), and later simplified to a 9-pin D-type socket (DB9). Nowadays, 25-pin plug sockets are rarely used in applications. .

RS-232 adopts unbalanced transmission mode, the so-called single-ended communication. Since the difference between the sending level and the receiving level is only about 2V to 3V, its common mode rejection capability is poor. Coupled with the distributed capacitance on the twisted pair, the maximum transmission distance is about 15 meters, and the maximum rate is 20kb /s. RS-232 is designed for point-to-point (that is, only a pair of receiving and transmitting devices) communication, and its driver load is 3-7kΩ. So RS-232 is suitable for communication between local devices.

The full name of the RS422 standard is "Electrical Characteristics of Balanced Voltage Digital Interface Circuit", which defines the characteristics of the interface circuit. The typical RS-422 is a four-wire interface. There is actually a signal ground wire, a total of 5 wires. Its DB9 connector pin definition. Because the receiver adopts high input impedance and the transmission driver has stronger driving capability than RS232, it is allowed to connect multiple receiving nodes on the same transmission line, up to 10 nodes can be connected. That is, a master device (Master), and the rest are slave devices (Slave). The slave devices cannot communicate, so RS-422 supports point-to-many two-way communication. The receiver input impedance is 4k, so the maximum load capacity of the transmitter is 10×4k+100Ω (terminating resistance). The RS-422 four-wire interface adopts separate sending and receiving channels, so there is no need to control the data direction. Any necessary signal exchange between the devices can be done in software (XON/XOFF handshake) or hardware (a pair of separate dual Stranded wire) to achieve.

The maximum transmission distance of RS-422 is 1219 meters, and the maximum transmission rate is 10Mb/s. The length of the balanced twisted pair is inversely proportional to the transmission rate, and the maximum transmission distance is only possible when the rate is below 100kb/s. Only in a short distance can the highest rate of transmission be obtained. Generally, the maximum transmission rate that can be obtained on a 100-meter-long twisted pair cable is only 1Mb/s.

RS485 is developed on the basis of RS-422, so many electrical regulations of RS-485 are similar to RS-422. If all adopt the balanced transmission method, all need to connect the terminating resistor on the transmission line, etc. RS-485 can use two-wire and four-wire methods. The two-wire system can realize true multi-point two-way communication. When four-wire connection is adopted, only point-to-many communication can be realized like RS-422, that is, there can only be one master ( Master) device, the rest are slave devices, but it is an improvement over RS-422, no matter the four-wire or two-wire connection mode, 32 devices can be connected to the bus.

The difference between RS-485 and RS-422 is that its common-mode output voltage is different. RS-485 is between -7V and +12V, while RS-422 is between -7V and +7V. RS-485 receiver The minimum input impedance is 12kΩ and RS-422 is 4kΩ; because RS-485 meets all RS-422 specifications, RS-485 drivers can be used in RS-422 network applications.

RS-485 is the same as RS-422, its maximum transmission distance is about 1219 meters, and the maximum transmission rate is 10Mb/s. The length of the balanced twisted pair is inversely proportional to the transmission rate, and the longest cable length may be used when the rate is below 100kb/s. Only in a short distance can the highest rate of transmission be obtained. Generally, the maximum transmission rate of a 100-meter-long twisted pair is only 1Mb/s

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