D-Link DGS-1248T mini-GBIC Port 45F ~ 48F LEDs

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Speed:
Green : When the Speed LED lights green, the respective port is connected to a
1000Mbps Gigabit Ethernet network.
Amber : When the Speed LED lights amber, the respective port is connected to a
100Mbps Fast Ethernet network.
Off : When the Speed LED lights off, the respective port is connected to a
10Mbps Fast Ethernet network.
mini-GBIC Port 45F ~ 48F LEDs
Link/ACT:
On : When the mini-GBIC module is installed and connected to a
network, the Link LED lights on.
Blinking When the LED is blinking, the port is transmitting or receiving data
on the network.
Off : No mini-GBIC module is installed or connected to a network.