For Gigabit Ethernet, the G4X switch module features four GBIC ports for 1000BASE-SX or 1000BASE-LX connections. BlackDiamond supports a maximum of 32 Gigabit Ethernet ports when fully populated with G4X modules. This unit is configured as four-port GBIC-based (G4-LX) switch module with four 1000BASE-LX GBICs.