Industrial routers achieve permanent online status primarily through the integration of various high reliability and redundancy mechanisms in their design. Below is a detailed explanation of these mechanisms, using the SR800 4G/5G router as an example:

Built-in Watchdog Chip

The Watchdog Timer, a hardware monitoring circuit, keeps a close eye on the device’s operational status. If the device malfunctions or crashes, the Watchdog chip, upon not receiving a “heartbeat” signal within a set interval, automatically reboots the device, restoring normal system operation. This mechanism ensures swift self-recovery and continuous online presence in case of faults.

Industrial  5g router SR800

PPP Data Link Layer Status Detection

PPP (Point-to-Point Protocol) is used for data packet transmission over serial links. Industrial routers communicate with network operators’ base stations via PPP. PPP’s status detection mechanism continuously monitors the connection state of the data link. Upon detecting a link disconnection, the router automatically attempts to re-establish the connection, ensuring sustained network availability.

ICMP Heartbeat Packets

ICMP (Internet Control Message Protocol) heartbeat packets are used to monitor network connectivity. The router periodically sends ICMP Echo requests (Ping requests) and waits for responses from the target device. If a response is not received within the expected timeframe, the router identifies a network anomaly and automatically restarts relevant services or reconnects to the network to restore communication stability.

Dual SIM Card Slots

Industrial  5g router SR800

The SR800 router features dual SIM card slots, allowing users to insert two SIM cards from different operators. In the event of network issues with one SIM card, the router can seamlessly switch to the other, ensuring uninterrupted network operation. This redundancy significantly enhances network reliability.

Multi-Network Backup

The SR800 router supports not only 4G/5G networks but also Wi-Fi and Ethernet interfaces. These network interfaces can back each other up. When one network fails, the router automatically switches to another available network, ensuring continuous data transmission.

VRRP Dual-Router Intelligent Switching

VRRP (Virtual Router Redundancy Protocol) is a protocol for router redundancy. The SR800 router supports VRRP, enabling two routers to form a virtual router group. If the primary router fails, the backup router automatically takes over, ensuring continuous network service. This mechanism prevents single points of failure and enhances system reliability.

Remote Maintenance and Fault Diagnosis

Industrial  5g router SR800

The SR800 router supports remote maintenance and fault diagnosis. Engineers can remotely access the router to monitor its status in real-time, troubleshoot, and repair faults. Even if engineers are not on-site, they can promptly address issues, ensuring stable device operation.