Buy a Juniper Networks EX Series EX4300-48P - switch - 48 ports - managed - rack-mountable or other Ethernet Switches at
Juniper Networks EX4300-48P 48-Port 10/100/1000Base-T PoE+ Eth Switch
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Juniper Networks EX Series EX4300-48P 48-Port 10/100/1000 POE+ Rack Switch
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JUNIPER EX4300 48-PORT Gigabit PoE+ Ethernet Switch W/Ears P/N:EX4300-48P Tested $149.99 - PicClick