3Com 3C16755-US User Guide - Page 8

Dual Speed Hub 16-Front Collision LEDs yellow Flash each time a collision is detected on the Hub's 100Mbps or 10Mbps segment. Occasional collisions are a normal part of network operation; however, sustained collisions may indicate a problem. 10M 100M Power Collision Port Status 12 34 5 6 7 8 9 10 11 12 13 14 15 16 Green = 100M, Yellow = 10M, Flash = Activity Network Utilization 10M 100M 1% 10% 40% 80% 1% 10% 40% 80% OfficeConnect Dual Speed Hub 16 Power LED green Indicates that the power supply to the Hub is Port Status LEDs green (100Mbps link) / yellow (10Mbps link) If the LED is on, the link between the port and the next piece of network equipment is OK. If the LED is flashing, the link is OK and data is being received. If the LED is off, nothing is connected, or the connected device is switched off, or there is a problem with the connection (refer to the "Problem Solving" section). 8 Network Utilization LEDs green / yellow / orange (left row:10Mbps; right row:100Mbps) Indicate how much the 100Mbps and 10Mbps segments of your network are being used.