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