4G Router with Ethernet for Industrial IoT and M2M Connectivity

E-Lins 4G router with Ethernet solutions are designed for industrial IoT, M2M, remote access, and in-vehicle networking applications where wired devices require cellular connectivity. The H685 Series combines Ethernet networking with built-in cellular access and can be configured with Wi-Fi, VPN, serial communication, digital I/O, GPS/GNSS, remote management, and multi-WAN functions according to project requirements.

These routers can connect local equipment such as PLCs, RTUs, CCTV cameras, sensors, meters, controllers, industrial switches, computers, kiosks, vending machines, power-control equipment, and vehicle devices to a mobile network. Available functions and interfaces depend on the selected H685 model, cellular module, firmware version, and project configuration.

How to Choose a 4G Router with Ethernet

When selecting a 4G router with Ethernet, buyers should evaluate the connected equipment, cellular network requirements, installation environment, remote-management method, and required connection redundancy. The correct model is determined by the overall project network architecture rather than cellular speed alone.

• Confirm the required Ethernet configuration, including the number of LAN and WAN ports, whether switchable LAN/WAN ports are required, and whether a fixed-line WAN backup is part of the network design.
• Confirm the deployment country, mobile carrier, required LTE bands, LTE category, SIM-card type, and whether legacy 2G or 3G fallback is needed.
• Determine whether cellular, Ethernet WAN, and Wi-Fi client failover, failback, load balancing, or bandwidth link bonding is required for the target site.
• Identify any connected industrial equipment that requires RS232, RS485, digital input/output, console access, GPS/GNSS, Wi-Fi, or additional antenna connections.
• Review VPN, firewall, authentication, routing, port-forwarding, and remote-access requirements with the project IT team or system integrator.
• Confirm the required power-input range, passive PoE requirement, dual or tri power input, vehicle ignition sensing, mounting method, and operating conditions.
• Specify whether the router will be managed through web UI, SMS, SSH, Telnet, SNMP, TR-069, API, or the E-Lins Network Management System.

Application Scenarios

A 4G router with Ethernet is commonly used when wired field equipment needs internet access, remote monitoring, private-network communication, or a backup connection without relying only on fixed broadband. The H685 Series is suitable for distributed deployments where local Ethernet devices need to communicate with a cloud platform, server, control center, or remote maintenance system.

• CCTV security surveillance and remote video monitoring
• AMR, smart metering, power control, energy monitoring, and utility networks
• PLC, RTU, SCADA, industrial automation, and remote-control systems
• Vehicle, fleet, mobile command, and in-vehicle communication projects
• Vending machines, retail terminals, kiosks, ATM-related equipment, and digital signage
• Water management, water scheduling, environmental monitoring, weather monitoring, and street-light control
• Traffic systems, oil-field monitoring, postal services, banking-related equipment, and remote infrastructure
• Compact embedded M2M and IoT equipment requiring cellular and Ethernet connectivity

Core Connectivity and Network Functions

The H685 Series combines cellular connectivity, Ethernet networking, and optional Wi-Fi functions for industrial communication projects. Depending on the selected configuration, it can use a SIM card to access 2G, 3G, and 4G LTE networks, connect to an Ethernet WAN source, and use Wi-Fi client connectivity as an additional network source.

For projects requiring connection continuity, the router supports configurable cellular, Ethernet WAN, and Wi-Fi client connection paths. A primary link and one or more backup links can be defined so that the router can switch to an available backup connection if the primary connection fails. Supported connection-management functions include failover, failback, WAN failure detection, auto-dial, keep-alive functions, LCP checking, ICMP checking, and a built-in watchdog.

• Built-in industrial cellular modem with SIM card slot for multi-carrier 2G, 3G, and 4G LTE connectivity, depending on the selected module.
• Ethernet LAN and WAN connectivity for local equipment, fixed-line internet, cable, DSL, T1, satellite, and Metro Ethernet applications.
• Wi-Fi functions including access point, client mode, Wi-Fi as WAN, and Metro Wi-Fi support on compatible configurations.
• Cellular, WAN RJ45, and Wi-Fi client failover and failback options for multi-link network continuity.
• Load balancing and bandwidth link-bonding functions on supported configurations.
• LTE Advanced support with SIM-based auto-carrier selection, depending on the selected modem and project configuration.
• Cellular and Wi-Fi MIMO support with external antenna connections.
• Real-time device and data-usage alert functions for supported management configurations.

Failover, Load Balancing, and Link Bonding

For a failover deployment, a project can use a cellular SIM connection together with an xDSL line, Ethernet WAN connection, or Wi-Fi access point connected to the internet or a private network. When the configured primary connection is unavailable, the router can switch to a backup connection according to the selected failover rules. This configuration is useful for sites that require an alternative communication path for remote monitoring or control.

For load balancing and link bonding deployments, the H685 Series can use the embedded cellular module, RJ45 WAN connection, and Wi-Fi client connection together on supported configurations. Load balancing distributes traffic between available network interfaces based on configured rules. Link bonding can combine two or more links for redundancy or increased throughput, depending on the enabled function and network configuration. Actual results depend on the available carrier, WAN, Wi-Fi, and destination-network conditions.

Industrial Design and Environmental Protection

The H685 Series is designed for industrial and embedded networking applications that require a compact router with a metal enclosure, installation flexibility, and protection features for electrical and field deployment conditions. The product information includes an alloy-metal case with an IP30 protection standard and support for vibration- and shock-related installation conditions.

Built-in protection features include transient-voltage protection, reverse-polarity protection, over-current protection, and over-voltage protection. The product can be used in industrial cabinets, equipment housings, remote field stations, vehicles, and other installations where power quality and physical installation conditions need to be considered.

Integrated Modem, SIM Card Slot, and Industrial Interfaces

The H685 Series uses a built-in industrial cellular modem and SIM card slot to provide direct wireless communication through compatible mobile networks. The cellular module, LTE category, supported network standards, and frequency-band version should be selected according to the destination country and carrier requirements.

In addition to Ethernet connectivity, the product information includes serial communication, digital I/O, console access, external antenna connections, optional GPS/GNSS, and Wi-Fi functions. These options allow the router to communicate with industrial controllers, meters, sensors, alarm systems, legacy serial devices, and other field equipment.

• RS232 and RS485 serial communication through terminal connection.
• Four digital input/output ports for monitoring and control applications.
• Console port for local configuration and maintenance access.
• External SMA antenna connectors for cellular antennas, Wi-Fi antennas, and optional GPS antennas.
• UIM/SIM card slot compatible with 1.8 V and 3 V UIM/SIM cards.
• Optional GPS/GNSS support for vehicle, fleet, mobile asset, and location-related deployments.
• Wi-Fi support for local wireless device connection, maintenance access, or Wi-Fi-as-WAN network design.

VPN, Routing, Firewall, and Access Control

The H685 Series supports secure remote-access and private-network configurations through available VPN, routing, firewall, and authentication functions. Buyers should define the required network topology, required VPN protocol, remote server or headquarters environment, authentication method, and access-control policy before selecting the final configuration.

• VPN options including IPsec, PPTP, L2TP, GRE tunnel, OpenVPN option, DMVPN option, IPsec over L2TP, VPN pass-through, certificate support option, dynamic site-to-site VPN with NHRP, and VTI tunnel support.
• Routing functions including OSPF, BGP, RIP, VRRP, virtual server, port forwarding, IP passthrough, NAT, static routing, policy-based routing, and IPv6 option.
• Security features including SPI firewall, zone-based object firewall, RADIUS, TACACS+, 802.1x Ethernet authentication, MAC filtering, IP filtering, content filtering, website filtering, and per-client web filtering.
• Service and protocol controls including port blocking, service filtering, protocol filtering, WAN ping control, and supported application-layer gateways.
• LAN and WAN management functions including DHCP server, client, relay, DNS, DNS proxy, DDNS, UPnP, DMZ, multicast proxy, QoS, VLAN 802.1Q, and LAN/WAN affinity.

Power Input, Passive PoE, and Vehicle Applications

The H685 Series supports wide-range DC power input, passive PoE, and dual or tri power input configurations. These functions are intended for fixed industrial equipment, control cabinets, remote stations, and vehicle-related projects where a backup power path or different installation power source may be needed.

For vehicle applications, the provided product information includes reverse-polarity and transient-voltage protection according to ISO 7637-2, ignition sensing with automatic ON and time-delay OFF, and fuse requirements based on the installation voltage. The correct power version, PoE requirement, fuse rating, and wiring method should be confirmed for the final installation.

Desktop, Wall-Mount, and DIN-Rail Installation

The H685 Series can be installed by desktop placement, wall mounting, or DIN-rail mounting. This installation flexibility supports use in industrial cabinets, equipment housings, remote stations, vehicles, and embedded communication systems. Buyers should confirm the available mounting accessory and installation dimensions for the selected configuration.

GPS and GNSS Support

GPS/GNSS support is available for projects that require location information, route tracking, mobile asset management, or vehicle-related communication. The required GPS/GNSS function, antenna type, antenna position, and related application software should be confirmed according to the selected model and project design.

Remote Management and Device Monitoring

The H685 Series supports local and remote management through web GUI, API, CLI, SSH, Telnet, SMS, TR-069, SNMP, and the E-Lins Network Management System. Available management functions include local configuration, remote WAN management with access control, modem configuration, firmware update, data-usage monitoring, device alerts, diagnostics, profile backup, profile recovery, and remote maintenance functions.

Compatible E-Lins communication terminals can be connected to the E-Lins Network Management System for centralized monitoring, configuration, update, diagnosis, maintenance, and control across distributed locations. NMS availability, subscription requirements, supported device models, and the required management functions should be confirmed for each project.

OEM and ODM Configuration Support

E-Lins Communication Co., Ltd. provides OEM and ODM support for 4G router with Ethernet projects. Available customization depends on the selected H685 hardware platform, cellular module, destination market, order quantity, software requirements, and whether the project requires new hardware or firmware development.

• Product logo, housing marking, product labels, serial-number labels, barcode labels, and outer-carton marking.
• Customized packaging, user manuals, quick-start guides, language versions, and accessory combinations.
• Regional cellular module selection, LTE frequency bands, carrier-related settings, APN settings, and network or band lock options where supported.
• Default firmware configuration, VPN settings, management parameters, remote-management settings, and preloaded configuration files for batch deployment.
• Available Ethernet, Wi-Fi, GPS/GNSS, RS232, RS485, DI/DO, PoE, power-input, antenna, and mounting options based on the selected hardware platform.
• Customized warranty service arrangements, subject to final project confirmation.

New mechanical structures, non-standard interfaces, special firmware functions, additional carrier requirements, or project-specific certification requirements may require technical evaluation, prototype development, sample validation, and additional lead time.

About E-Lins Communication Co., Ltd.

E-Lins Communication Co., Ltd. develops and manufactures cellular networking products for M2M, IoT, industrial, commercial, and vehicle connectivity projects. The product range includes 4G and 5G industrial routers, cellular modems, Wi-Fi routers, industrial network switches, serial gateways, and control and communication devices.

For industrial 4G router with Ethernet applications, E-Lins Communication Co., Ltd. provides standard and project-based configurations that combine LTE connectivity with Ethernet networking, remote management, VPN, serial communication, digital I/O, Wi-Fi, GPS/GNSS, and different power-input options. Product selection should be based on the target network, deployment environment, connected equipment, and required project functions.

FAQ

What is a 4G router with Ethernet used for?

A 4G router with Ethernet connects local wired devices to a cellular network. It can be used for remote monitoring, internet access, private-network communication, and remote maintenance of equipment such as PLCs, cameras, meters, controllers, sensors, switches, kiosks, vending machines, and vehicle devices.

Can the H685 Series use cellular, Ethernet WAN, and Wi-Fi connections together?

The provided H685 Series information lists cellular, WAN RJ45, and Wi-Fi client failover, failback, load balancing, and bandwidth link-bonding functions. The available connection modes depend on the selected configuration, firmware, and network design.

Does the H685 Series support VPN for remote access?

Yes. The listed VPN options include IPsec, PPTP, L2TP, GRE tunnel, OpenVPN option, DMVPN option, IPsec over L2TP, VPN pass-through, certificate support option, dynamic site-to-site VPN with NHRP, and VTI tunnel support. The required VPN protocol and topology should be confirmed before model selection.

Which industrial interfaces are available?

The product information lists Ethernet, RS232, RS485, four digital I/O ports, console access, cellular antenna connections, Wi-Fi antenna connections, optional GPS antenna connection, and SIM card support. The available interfaces should be confirmed for the selected H685 model.

Can the H685 Series be installed in vehicles?

Yes. The product information includes in-vehicle application support, wide-range DC input, dual or tri power input, ignition sensing, reverse-polarity and transient-voltage protection, and vehicle-related fuse requirements. The exact power version and wiring method should be confirmed for the vehicle installation.

What information is needed to select a 4G router with Ethernet?

Please provide the target application, deployment country, mobile carrier or required LTE bands, expected quantity, Ethernet-port requirement, WAN backup requirement, Wi-Fi requirement, GPS/GNSS requirement, serial or DI/DO requirement, power-input range, mounting method, VPN protocol, remote-management requirement, and any logo, packaging, firmware, or documentation requirements.

Information to Prepare for an Inquiry

For an accurate product recommendation, sample evaluation, or quotation, please provide the target application, deployment country, mobile carrier or required LTE bands, expected quantity, required Ethernet-port configuration, and required interfaces. Details regarding Wi-Fi, GPS/GNSS, RS232, RS485, DI/DO, VPN, remote management, power input, passive PoE, vehicle installation, mounting method, operating environment, product labeling, logo files, packaging, technical documentation, and sample requirements can also help confirm the appropriate configuration.

H685 Series 4G Router with Ethernet Specifications

Specifications may vary by selected H685 model, cellular module, LTE category, regional frequency bands, firmware version, hardware interfaces, and optional functions.

• H685 4G Router Datasheet

H685 Series Order Model

Refer to the model definition below to identify the cellular modem, regional frequency-band version, and hardware configuration of the H685 Series.