55Category Transceiver module Centralwavelength Connector FiberMaxtransmissiondistanceSFP-FE-LX-SM1310-BIDITX: 1310 nmRX: 1550 nm100 MbpsBIDItransceivermodules SFP-FE-LX-SM1550-BIDIYou mustuse thesetwotransceivers in pairs.TX: 1550 nmRX: 1310 nmLC9/125 μmsingle modeoptical fiber15 km (9.32miles)1000 MbpsSFP stacktransceivermodulesSFP-STACK-Kit — — UTP/STP 1.5 m (4.92ft)NOTE:• To guarantee the functionality of the SFP ports, always use H3C SFP transceiver modules on the H3CS3100V2 Switch Series.• The SFP-STACK-Kit module is dedicated for connecting switches and has connected to a 1.5 m (4.92 ft)cable.• The SFP transceiver modules available for this switch series are subject to change over time. For the mostup-to-date list of SFP transceiver modules, consult your H3C sales representative or technical supportengineer.• For the SFP transceiver module specifications, see theH3C Low End Series Ethernet Switches PluggableModules Manual.• For how to install or replace an SFP transceiver module, see theH3C Pluggable SFP[SFP+][XFP]Transceiver Modules Installation Guide.LEDsTable 21 LEDs at a glanceSwitch series LEDPower LED (page 55)10/100Base-TX Ethernet port LEDs (page 56)S3100V2-TP-SIS3100V2-TP-EICombo interface LEDs (page 56)Power LED (page 56)Port mode LEDs (page 57)10/100Base-TX port LEDs (page 57)S3100V2-TP-PWR-EICombo interface LEDs (page 58)LEDs for the S3100V2-TP-SI/S3100V2-TP-EI switchesPower LEDThe power LED shows the power supplying status on the switch.