TP-Link T1600G-52TSTL-SG2452 T1600G-28TS V1 User Guide - Page 18
Status, Indication
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When the Speed LED is on, the port LED is indicating the data transmission status. Name Status Indication On The switch is powered on PWR Flashing Power supply is abnormal Off The switch is powered off or power supply is abnormal Flashing The switch works properly SYS On/Off The switch works improperly Green All the fans work properly FAN Yellow Not all the fans work properly Green On A 1000Mbps device is connected to the corresponding port but no activity Flashing Data is being transmitted or received Speed or PoE (port 1-24) Yellow On A 10/100Mbps device is connected to the corresponding port but no activity Flashing Data is being transmitted or received Off No device is connected to the corresponding port 1000Base-X (port 25-28) On Flashing Off A 1000Mbps device is connected to the corresponding port Data is being transmitted or received A 10/100Mbps device or no device is connected to the corresponding port When the PoE LED is on, the port LED is indicating the power supply status. Name Status Indication On The switch is powered on PWR Off The switch is powered off or power supply is abnormal Flashing Power supply is abnormal Flashing SYS On/Off The switch works properly The switch works improperly FAN Green Yellow All the fans work properly Not all the fans work properly On The remaining PoE power≤7W PoE Max Flashing The remaining PoE power keeps ≤7W after this LED is on for 2 minutes Off The remaining PoE power>7W Speed or PoE (port 1-24) Green Yellow On Flashing On The port is supplying power normally The supply power exceeds the corresponding port's maximum power Overload or short circuit is detected Off No PoE power supply is provided on the port 9