Last year (2024), during the intelligent upgrade of the Xiangjiaba Tunnel Complex in Yibin—specifically the Jiang’ao口, Yanmenxi, and Douba sections—Guangwangshi’s industrial-grade, all-scenario networking solution was successfully deployed. Faced with a complex tunnel environment stretching several kilometers, characterized by high humidity, dust, vibration interference, and extreme diurnal temperature variations, Guangwangshi’s solution, thanks to its industrial-grade protection design and reliability, ensured highly stable network operation, laying a solid digital foundation for safe tunnel management and effectively addressing the longstanding issues of frequent failures in traditional network equipment and heavy operational maintenance burdens.
Guangwangshi Solution
To build a smart tunnel network that is “visible, manageable, and controllable,” the project adopted an all‑industrial‑grade network management architecture:
■ Dual-Core Backbone: Two core-layer industrial managed switches were deployed—one featuring 8 electrical ports and 24 optical ports with 40 Gbps uplinks, and the other with 28 optical ports and 8 electrical ports also supporting 40 Gbps uplinks—forming a 10‑Gbps fiber‑optic core backbone that ensures millisecond‑level self‑healing, guaranteeing “zero interruption” on core links.
▷ 10‑Gbps fiber‑optic backbone ring architecture with millisecond‑level self‑healing
▷ Operates reliably across a wide temperature range of -40°C to +75°C, with 6 kV lightning protection and 8 kV electrostatic discharge resistance
■ Regional Aggregation: Four optical/electrical and eight optical/electrical industrial managed switches were used to construct redundant ring networks, enabling converged transport of multiple services such as high-definition video and environmental monitoring.
▷ Automatic switchover upon single‑device failure, with backup links activated within milliseconds
▷ Zero interruption for video surveillance and environmental sensing services; a single faulty device does not affect overall operations
■ Terminal Access: A large-scale deployment of 46 sets of two‑optical‑four‑electrical industrial managed switches precisely covers tunnel‑mounted cameras, sensors, and other devices, resolving both power supply and data transmission over distances of up to 150 meters using a single cable.
■ Intelligent Cloud‑Controlled Hub
The ONV‑NMS management platform, combined with a mobile app, provides dual‑endpoint empowerment:
▷ Platform Side: Visualized management of the entire network topology, with automatic diagnosis of abnormal alerts
▷ Mobile Side: Real-time push notifications of device alarms, triggering immediate operational responses with zero latency
Remote centralized operations reduce costs and boost efficiency, saving over 500,000 yuan annually in on-site inspection expenses.
Hardcore Technical Strength
Military‑Grade Reliability: Operates reliably across a wide temperature range of -40°C to +85°C, with 6 kV lightning protection, IP40 ingress protection, and an aluminum alloy corrosion‑resistant housing, designed to withstand the tunnel’s harsh conditions of high humidity and abundant dust.
Intelligent Scheduling Engine: Featuring a large cache specifically tailored for security applications, it ensures smooth transmission of 6‑megapixel HD video streams, reducing stuttering rates by 90%.
Three‑Layer Redundant Protection Network: A three‑layer ring topology (star plus tangent rings) provides dual redundancy at both the device and link levels, with fault self‑healing times under 20 milliseconds.
Key Achievements
➤ Year‑round zero‑failure operation: Video streams remain 100% stable even in humid and vibrating environments
➤ Operational maintenance costs reduced by 60%: The corrosion‑resistant metal housing extends equipment lifespan to twice the industry average
➤ Second‑level fault localization: The network management platform continuously monitors the status of 42 access points, boosting repair efficiency by 90%
“From Yanmenxi to Douba Tunnel, there’s a monitoring node every 200 meters—Guangwangshi industrial switches are our ‘underground digital sentinels’!” —said the project’s operations manager.
Why Did Major Infrastructure Developers Choose Us?
Twenty‑Two Years of Building Specialized Transportation Networks:
Industrial ring‑network technology validated in over 300 tunnels nationwide
Leading market share in the security‑transmission sector for six consecutive years
Customization capabilities spanning from desert regions to extremely cold climates
