TP-Link TL-SG3428XPP-M2 Installation Manual page 12

JetStream L2/L2+ Managed Switch
LED
SFP+
For TL-SG3428
LED
PWR
SYS
Link/Act
1000Mbps
Port 25–28
For TL-SG3428X
LED
PWR
SYS
Link/Act
1000Mbps
08 Introduction
Indication
Green On: Running at 10 Gbps, but no activity.
Green Flashing: Running at 10 Gbps and transmitting or receiving data.
Yellow On: Running at 1 Gbps, but no activity.
Yellow Flashing: Running at 1 Gbps and transmitting or receiving data.
Off: No device is linked to the corresponding port.
Note: For TL-SG3452X
Indication
On: The switch is powered on.
Off: The switch is powered off or power supply is abnormal.
Flashing: Power supply is abnormal.
Flashing: The switch works properly.
On or Off: The switch works improperly.
On: A device is linked to the port but no activity.
Off: No device is linked to the corresponding port.
Flashing: Transmitting or receiving data.
On: Running at 1000 Mbps.
Off: Running at 10/100 Mbps or no device is linked to the port.
On: Running at 1 Gbps, but no activity.
Flashing: Running at 1 Gbps and transmitting or receiving data.
Off: No device is linked to the corresponding port.
Indication
On: The switch is powered on.
Off: The switch is powered off or power supply is abnormal.
Flashing: Power supply is abnormal.
Flashing: The switch works properly.
On or Off: The switch works improperly.
On: A device is linked to the port but no activity.
Off: No device is linked to the corresponding port.
Flashing: Transmitting or receiving data.
On: Running at 1000 Mbps.
Off: Running at 10/100 Mbps or no device is linked to the port.