Installation
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H900t – Dual SIM 4G Industrial Router – Quick Start Guide
Step-by-step quick start guidance for the H900t industrial router.
Installation & Setup
Initial Device Configuration & Setup
Learn the first steps for E-Lins industrial connectivity devices, including hardware preparation, SIM installation, antenna connection, and initial setup.
Installation
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Installation
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H820 – 4G Industrial Router – Quick Start Guide
Quick-start guidance for preparing and configuring the H820 industrial router. Video link to be added
Installation
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How to Install the SIM Card in an E-Lins 4G/5G Router
Locate the SIM slot, insert the card correctly, and avoid the classic seating mistakes. Video link to be added
Installation
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How to Install Antennas for the Best Cellular Signal
Which antenna goes where, and how placement and cable length affect signal quality. Video link to be added
Installation
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How to Connect Power Safely
Power input ranges, polarity, and surge precautions for industrial sites. Video link to be added
Installation
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How to Connect Ethernet — WAN and LAN
Cable your first Ethernet link and understand the port roles. Video link to be added
Installation
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How to Mount on a DIN Rail or Wall
DIN-rail clip and wall-mount options for cabinets and enclosures. Video link to be added
Configuration & Operation
Configuration & Operation Guides
Master the Web UI, APN, network, dual-SIM, Wi-Fi, VPN, serial / I/O, GNSS, and PoE settings that power everyday operation of E-Lins industrial routers and gateways.
Configuration
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How to Configure the Web UI and Admin Access
Log in, navigate the dashboard, and manage user accounts. Video link to be added
Configuration
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How to Configure APN Settings for Your Carrier
Set the correct APN so the router registers on the mobile network. Video link to be added
Configuration
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How to Configure Network Settings — WAN / LAN / DNS
IP modes, routing, DNS, and DHCP for your site topology. Video link to be added
Configuration
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How to Configure Dual SIM and Failover
Primary / backup SIM behaviour and automatic failover. Video link to be added
Configuration
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How to Configure Wi-Fi — SSID, Security, Guest Network
Wireless basics plus isolated guest access. Video link to be added
Configuration
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How to Configure Ethernet Ports and VLANs
Port roles, link settings, and simple VLAN segmentation. Video link to be added
Configuration
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How to Set Up VPN — OpenVPN / IPsec / WireGuard
Choose a VPN type and complete a working tunnel. Video link to be added
Configuration
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How to Configure Serial Ports and Digital I/O
RS232 / RS485 modes and DI / DO wiring for field signals. Video link to be added
Configuration
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How to Configure GPS / GNSS Tracking
Enable positioning and stream NMEA data. Video link to be added
Configuration
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How to Configure and Use PoE
Power downstream devices and verify PoE budgets. Video link to be added
Configuration
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How to Set Up Remote Management
Reach the device from the NMS or cloud platform. Video link to be added
Firmware & Device Management
Firmware & Device Management
Keep every device healthy in the field: firmware upgrades and recovery, OTA updates, configuration backup / restore, and fleet-wide remote management through the E-Lins NMS platform.
Firmware
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How to Upgrade Firmware on E-Lins Routers
Check versions, download the right image, and upgrade safely. Video link to be added
Firmware
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How to Recover Firmware After a Failed Update
Use recovery mode to bring an unresponsive device back. Video link to be added
Firmware
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How to Set Up OTA (Over-the-Air) Updates
Schedule and roll out firmware across the fleet remotely. Video link to be added
Firmware
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How to Back Up and Restore Configuration
Snapshot settings before changes and roll back in minutes. Video link to be added
Firmware
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How to Manage Devices Remotely
Bulk configuration, reboots, and diagnostics over the air. Video link to be added
Firmware
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How to Use the E-Lins NMS Platform
Onboard routers, organize sites, and manage at scale. Video link to be added
Firmware
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How to Monitor Network Health and Alerts
Signal quality, traffic, and event notifications. Video link to be added
Troubleshooting
Troubleshooting & Problem Solving
Search-friendly fixes for the problems field teams hit most — written as the questions users actually type into search.
Troubleshooting
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How to Troubleshoot a 4G/5G Router with No Internet Connection
A systematic checklist from SIM and APN to signal and carrier registration. Video link to be added
Troubleshooting
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How to Fix "SIM Card Not Detected" on an E-Lins Router
SIM seating, carrier compatibility, and PIN-related causes. Video link to be added
Troubleshooting
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How to Improve Weak Cellular Signal in Industrial Sites
Antenna selection, placement, and cable best practices. Video link to be added
Troubleshooting
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How to Fix VPN Connection Failures
Phase 1 / Phase 2 checks, NAT traversal, and firewall rules. Video link to be added
Troubleshooting
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How to Fix "Device Cannot Connect" to the Management Platform
Registration, heartbeat, and firewall / NAT diagnostics. Video link to be added
Troubleshooting
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How to Troubleshoot Ethernet Problems
Link lights, port settings, and cable faults. Video link to be added
Troubleshooting
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How to Troubleshoot Serial Communication Problems
RS232 / RS485 settings, grounding, and Modbus RTU diagnostics. Video link to be added
Troubleshooting
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How to Fix Firmware Upgrade Failures
Image verification, recovery mode, and safe retry. Video link to be added
Troubleshooting
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How to Reset the Device and Recover Settings
Factory reset options and restoring a saved configuration. Video link to be added
Advanced How-To
Advanced Technical How-To Guides
Advanced configuration and integration tutorials that go beyond basic setup — a growing library for engineers and integrators.
How-To
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How to Configure Dual SIM Failover
Policy-based failover with real-world timing benchmarks. Video link to be added
How-To
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How to Set Up IPsec VPN
Site-to-site and road-warrior topologies on E-Lins routers. Video link to be added
How-To
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How to Configure RS485 / Modbus
Wire, map, and poll PLC data over serial with Modbus RTU. Video link to be added
How-To
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How to Use PoE
Power cameras, radios, and sensors over the Ethernet cable. Video link to be added
How-To
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How to Configure GNSS
Tracking modes, geofencing, and NMEA output. Video link to be added
How-To
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How to Connect a PLC
Step-by-step PLC connectivity over Ethernet and serial. Video link to be added
How-To
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How to Set Up Remote Access
Reach PLCs, HMIs, and controllers behind a cellular router. Video link to be added
Related Technical Resources
Keep Learning Beyond Video
When a tutorial is not enough, jump into product documentation, manuals, and the knowledge base — or reach the E-Lins support team directly.
Frequently Asked Questions
Frequently Asked Questions
The most common questions from engineers and installers using the E-Lins video tutorial library.
Everything you need to know about E-Lins video tutorials
The most common questions from engineers and installers using the E-Lins video tutorial library.
Still stuck after watching?
Our support engineers reply to technical inquiries within one business day.
Contact Support →
Finding the Right Video
Which E-Lins products have video tutorials?
Quick-start tutorials for the H900t and H820 series are available now, and new titles are added every month. The library is organized by task — installation, configuration, firmware, troubleshooting, and advanced how-to guides — so you can jump straight to what you need.
How do I find a tutorial for my specific router model?
Browse the five sections above — each card lists the model and topic it covers. For a specific model, start with Installation & Setup and Configuration & Operation, where most model-specific guides live.
Can I request a tutorial that doesn't exist yet?
Yes. Submit a ticket with your model and topic — popular requests are prioritized in our monthly video production plan.
Watching & Access
Are the tutorials available in languages other than English?
Videos are narrated in English with YouTube closed captions (cc). Subtitled versions in more languages are planned, and the E-Lins website itself is available in 13 languages.
The video won't play on my company network. What should I do?
Tutorials stream from YouTube. If your firewall blocks it, ask your IT team to allow youtube.com and youtube-nocookie.com — or follow the step-by-step written guides in the E-Lins wiki instead.
Can I download tutorials for offline training?
Online streaming is the standard, but offline training packages can be arranged for partners and integrators — contact your account manager or submit a support ticket.
Content & Accuracy
Do video tutorials replace the user manual?
No — they complement each other. Videos are the fastest way to get started, while the user manual and wiki carry the complete specifications, CLI references, and default values.
How up to date are the tutorials?
Each tutorial is reviewed and re-recorded when the related firmware changes significantly. Check the Firmware & Device Management section for the latest update workflows.