Published: 2026-07-29
Among the mountains of Sanming, Fujian, a quiet upgrade with far‑reaching implications for the power system is underway. Through a series of precise, decentralized fiber‑optic communication construction projects, a more reliable and intelligent grid communication system is being woven, revitalizing the grid deep in the mountains.
I. Project Overview
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The 10 kV fiber‑optic communication access network construction in the Sanming area is not a single large project, but rather a collection of technical pilots and upgrade retrofits carried out in recent years. The development shows a clear technological evolution path: from Youxi County achieving Fujian Province's first wired fiber‑optic communication for pole‑mounted circuit breakers in May 2024, to Jianning County building the first three‑layer network architecture distribution grid in June of the same year, and then to Shaxian District taking the lead in deploying large‑capacity OTN transmission equipment in March 2025. This process has been strongly supported by the municipal government's policy on smart distribution grid upgrades, and has innovatively adopted a "fiber resource swap and sharing" model with telecom operators, efficiently consolidating the communication foundation across the entire region.
II. MRD Involvement
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In this complex and demanding industrial communication environment, MRD industrial switches have provided critical support for the reliable and stable operation of the entire network. Their core value is mainly reflected in the following three aspects:
Rugged and Reliable Industrial DNA: Specifically designed for harsh environments, featuring wide‑temperature operation, interference immunity, and high protection ratings, ensuring uninterrupted stable operation under complex mountain conditions – this serves as the physical foundation of network reliability.
Deep Adaptation to Power Services: Supports critical power protocols, and integrates IP binding and security isolation mechanisms, meeting the dual stringent requirements of real‑time performance and security for production control services.
Key Pivot for Intelligent Networks: As a core node connecting terminals and the master station, it reliably aggregates data and supports advanced distribution automation applications, serving as the network hub that unites distributed sites into an integrated intelligent whole.
III. MRD Related Equipment
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TCC4100-BWRED8
·High‑performance and flexibly configurable switch
·Backplane bandwidth up to 52 Gbps
·Supports ring topology and MRD‑Ring® ring media redundancy protocol based on IEC 62439
·Supports network management via Web browser, CLI, and Telnet
·Supports port‑based VLAN, IEEE 802.1Q VLAN, and GVRP
·Supports QoS (IEEE 802.1P/1Q and TOS/DiffServ)
·Built‑in MicOS real‑time operating system, unified across all MRD™ switches
·Redundant dual‑power input design
·Die‑cast aluminum alloy housing
·Fanless, operating temperature from –40°C to +85°C
The practice in Sanming provides a replicable and reliable model for smart grid development in mountainous areas. This not only consolidates MRD's position as an industry leader, but also sets a benchmark for the industry, demonstrating the core value of building an independently controllable technology system in critical infrastructure.
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