Project Name: Interlock Control System of China HSR
Products Deployed: RES-3242GC-E
On October 26, 2010, the Shanghai–Hangzhou High-Speed Railway, also known as the HuHang High Speed Rail, had opened. The Shanghai–Hangzhou High-Speed Railway is 202 km long, stopping at Minhang, Songjiang, and Jinshan Districts of Shanghai City, plus the cities of Jiaxing and Hangzhou in Zhejiang Province. This rail line, with 8 train stations 2 turnouts, is coordinated by HuHang Intercity Station of Shanghai Customer Specialist Center.
The system requires the implementation of the CLC (central logic controller) for each regional section to communicate with the main station – for collectively handling communications with the main station, as well as station-to-station(scene) interface. Additionally, the station also has implementation of the ZLC (zone logic controller), which handles emergency control terminal and other equipment. The ZLC exchanges information with the central station via the secret redundancy channel, forming "regional computer network system loaded with ability for live emergency control".
This project uses 20 ORing RES-3242GC-E Ethernet switches. Two of these ORing Ethernet switches are placed at each train station for dual-link network redundancy. Each RES-3242GC-E is connected to 2 servers for RAID 1 redundancy. Different units of RES-3242GC-E are inter-connected in 2x2-and-get-2 hardware redundancy, and the communications among all sub-stations and the main station are carried through the SDH transmission network of Ministry of Railways.