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Product features:
24 Port L2+ Gigabit Stackable Ethernet Managed Switch, 2 Option 10 Gigabit Uplinks
Order info:

DGS-3426  24-port 10/100/1000Base-T L2+ Stackable Management Switch with 4 Combo SFP and 2 open slots for optional 10GE modules

Optional Management Software
DS-510S
    D-View 5.1 SNMP Network Management Program (standard version)
DS-510P    D-View 5.1 SNMP Network Management Program (professional version)

Optional 10-Gigabit Uplink Modules
DEM-410X
     1-slot 10-Gigabit XFP uplink module
DEM-410CX  1-port 10-Gigabit CX4 uplink module

Optional 10-Gigabit XFP Transceivers
DEM-421XT 
XFP transceiver, 10GBASE-SR standard, multi-mode fiber, max. distance 300 m, 3.3/5V
DEM-422XT  XFP transceiver, 10GBASE-LR standard, single-mode fiber, max. distance 10 km, 3.3/5V
DEM-423XT  XFP transceiver, 10GBASE-ER standard, single-mode fiber, max. distance 40 km, 3.3/5V

Optional SFP Transceivers
DEM-310GT
   SFP transceiver, 1000BASE-LX standard, single-mode fiber, max.distance 10km, 3.3V operating voltage
DEM-311GT   SFP transceiver, 1000BASE-SX standard, multi-mode fiber, max. distance 550m, 3.3V operating voltage
DEM-312GT2 SFP transceiver 1000BASE-SX standard, multi-mode fiber, max. distance 2km, 3.3V operating voltage
DEM-314GT   SFP transceiver, 1000BASE-LX standard, single-mode fiber, max. distance 50km, 3.3V operating voltage
DEM-315GT   SFP transceiver, 1000BASE-LX standard, single-mode fiber, max. distance 80km, 3.3V operating voltage
DEM-330T     WDM SFP transceiver, 1000BASE-LX standard, single-mode fiber, max. distance 10 km, 3.3V operating voltage, Tx wavelength 1550 nm, Rx wavelength 1310 nm
DEM-330R    WDM SFP transceiver, 1000BASE-LX standard, single-mode fiber, max. distance 10 km, 3.3V operating voltage, Tx wavelength 1310 nm, Rx wavelength 1550 nm
DEM-331T    WDM SFP transceiver, 1000BASE-LX standard, single-mode fiber, max. Optional SFP Transceivers distance 40 km, 3.3V operating voltage, Tx wavelength 1550 nm, Rx wavelength 1310 nm
DEM-331R    WDM SFP transceiver 1000BASE-LX standard, single-mode fiber, max. distance 40 km, 3.3V operating voltage, Tx wavelength 1310 nm, Rx wavelength 1550 nm

Optional Redundant Power Supply
DPS-500  140-watt redundant power supply
DPS-600  500-watt redundant power supply
DPS-800  2-slot redundant power supply chassis
DPS-900  8-slot redundant power supply chassis

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