The 9-port Gigabit Ethernet (GEN) Switch Fabric Module (Model Number 3CB9FG9) is optimized for use in the SuperStack II 4007 7-slot chassis. The module has six non-blocking Gigabit Ethernet ports that connect directly to the chassis backplane to provide high-speed, low-latency connectivity between SuperStack II 4007 interface modules. Its front panel features three non-blocking Gigabit Interface Converter (GBIC) interface ports that accept optional GBIC transceivers. You can install the 9-port GEN Switch Fabric Module in either the 7-slot chassis.