the led indicators of the switch include power, 100 m, link/act (link/activity) and fdx/col (full-duplex/collision). the led indicators are used to facilitate monitoring and troubleshooting of the switch. the following shows the led indicators for the switch along with an explanation of each indicator.

   

    ◆power. this indicator operates when the switch is turned on. if this indicator is not lit, check the ac power connector to ensure proper insertion of the power cord and that the power switch is turned on.

    ◆100 m. the led indicator lights green when a 100 mbps device is connected to a respective port or the uplink port. if a 10 mbps device is connected to a respective port or the uplink port, the led indicator is off.

    ◆link/act. these led indicators are lighted up green when there is a secure connection (or link) to a device at any of the ports. the led indicators blink green whenever there is reception or transmission (i.e. activity-act) of data occurring at a port.

    ◆fdx/col. this led indicator is green when a respective port is in full duplex (fdx) mode. otherwise, it is off for half duplex (hdx) operations. it blinks yellow when collisions are occurring on the respective port.