Installation ManualH3C S7500 Series Ethernet Switches Chapter 1 Product Overview1-18Note:For the S7500 series, a board with pink edges can be inserted only into a slot indicatedby a pink area on the fan tray, and a board with purple or green edges can be insertedonly into a slot indicated by a purple area.1.5.3 BackplaneThe backplane of the S7500 series is located in the integrated chassis and implementshigh-speed data exchange and management & control signal exchange betweenSRPUs and LPUs. The backplane in the S7500 chassis supports XG high speed bus.The backplane has the following functions:z Providing communication channels for signal exchange between boardsz Supporting online insertion and removal of boardsz Supporting slot auto-identificationz Connecting to the power modules to provide distributed power supply for LPUsand SRPUsz Connecting to fan tray and power monitoring signal cablesz Supporting switchover between the active and standby SRPUs (only for theS7506R)(1) (2)(3)(4)(1) SRPU socket (2) Fan tray socket(3) PWR socket (4) LPU socketFigure 1-11 Backplane of the S7503
