3Com 3C16751A manual Creating Your Network, Dual Speed Hub 16-Front, Port Status LEDs

CREATING YOUR NETWORK

Dual Speed Hub 16—Front

Alert LED	Power LED	Collision LEDs
orange	green	yellow
Off when the Hub is operating	Indicates that	Flash each time a
correctly. Lit for a short period of	the power	collision is detected on
time after power on, for self test.	supply to the	the Hub's 100Mbps or
If the LED is continuously lit, there	Hub is	10Mbps segment.
may be a problem. Refer to the	present.	Collisions are a normal
“Problem Solving” section.		part of network
		operation.

				Port Status
100M	1	2	3	4	5	6	7	8
Collision	9	10	11	12	13	14	15	16

Alert Power 10M

Green = 100M Yellow = 10M Flash = Partitioned

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 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). If flashing, the port is partitioned, possibly due to a network loop.

Network Utilization

100M

1% 2% 3% 6% 12% 25% 50% 80%

10M

OfficeConnect Dual Speed Hub 16

Network Utilization LEDs

green / yellow / orange (top row:100Mbps; bottom row:10Mbps) Indicate how much the 100Mbps and 10Mbps segments of your network are being used.

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