30GE SFPtransceivermodule/cableCentralwavelengthConnectorCablespecificationsModalbandwidth(MHz*km)MaxtransmissiondistanceSFP-GE-LH80-SM1550 1550 nm LC9/125 μmsingle-modeoptical fiberN/A 80 km (49.71miles)SFP-GE-LH80-SM1550-D 1550 nm LC9/125 μmsingle-modeoptical fiberN/A 80 km (49.71miles)SFP-GE-LH100-SM1550 1550 nm LC9/125 μmsingle-modeoptical fiberN/A 100 km (62.14miles)SFP-GE-LX-SM1310-BIDIYou mustuse thesetwotransceivermodules inpairs.• TX: 1310 nm• RX: 1490 nmLC9/125 μmsingle-modeoptical fiberN/A10 km (6.21miles)SFP-GE-LX-SM1490-BIDI• TX: 1490 nm• RX: 1310 nm N/ASFP copper network cableSFP-STACK-Kit N/A N/A SFP coppernetwork cable N/A 1.5 m (4.92 ft)NOTE:• As a best practice, use H3C transceiver modules and cables for the SFP ports.• The H3C transceiver modules and cables available for the SFP ports are subject to change overtime. For the most up-to-date list of H3C transceiver modules and cables available for the SFPports, contact your H3C sales representative or technical support engineer.• For the specifications of the H3C transceiver modules and cables, see H3C Transceiver ModulesUser Guide.LEDsSystem status LEDThe system status LED shows the operating status of the switch.Table 13 System status LED descriptionLED mark Status DescriptionSYSSteady yellow BootROM booting stage.Steady green Linux kernel booting stage, or the switch has started up correctly.Flashing green (1 Hz) Software image loading and decompressing stage, or softwarebooting stage.Steady red The switch has failed POST or the switch is faulty.Off The switch is powered off or has not started up correctly.