D-Link DFE-908 User Guide - Page 25

Dual-Speed Stackable Hubs User's Guide This indicator lights green when the hub is receiving power; otherwise, it is off. ♦ Collision Indicators (Col 10M/ Col 100M) These indicators indicate data collisions on the respective 10Mbps Ethernet or 100Mbps Fast Ethernet segments connected to the hub. (If several hubs are stacked or linked together, all of them should detect and indicate the same collision, since collisions span the entire network segment.) Whenever a collision is detected, the respective COL indicator will briefly blink amber. ♦ 10Mbps and 100Mbps Utilization Indicators The utilization bar graphs provide a quick reference on the current traffic load relative to the total available 10Mbps or 100Mbps network bandwidth. The graphs display a measure of the percentage of bandwidth in use on the respective network segment. All data packets are counted, whether valid or not. Port State Indicators There is one port state indicator for each of the twisted-pair ports on the hub. Each port's LED status indicator reports the port's link and activity status, and shows whether or not the port has been partitioned. The following describes each indicator and the meaning of each condition: ♦ Link (steady green) The indicator of a port lights green when the port is connected to a powered Ethernet or Fast Ethernet station. If the station to which the hub is connected is powered off, or if there is a problem with the link, the LED will remain off. Understanding Indicators 13