D-Link DES-3624 Series User Manual page 22

♦ 100M These indicators are illuminated green when a 100 Mbps device is connected to any of the 22+2
or 20+2 ports or uplink port. If a 10 Mbps device is connected to any of the 24 ports or uplink port, these
LEDs remain dark. When a port is active, these indicators will blink green.
♦ Link/Act These indicators are lit when there is a secure connection (or link) to a device at any of the
ports. The LEDs blink whenever there is reception or transmission (i.e. Activity--Act) of data occurring
at a port.
26
Stackable NWay Ethernet Switch User's Guide
Identifying External Components