Lantronix MINI FAST LFH4-M User Manual
Page 12
11
3.1 Power LED
The green LED on the front panel labeled PWR is used to indicate that
the LFH hub is receiving power and is turned on. If the LED is off,
check the following to isolate the problem:
▼
Make sure the power cord is properly connected to the power outlet
and is properly inserted into the power connection on the LFH hub
▼
Determine whether or not the outlet is functional by plugging
another device into the receptacle
3.2 Collision LED
The yellow collision LED is located on the front panel and is labeled
COL
. This indicates that two (or more) stations on the network
attempted to transmit at the same time. When a collision occurs, all of
the stations involved will recognize the collision, wait a random
amount of time, and re-transmit. Collisions are normal in Ethernet
networks, though excessive collisions may indicate that your network
is overly congested. Other network problems can cause excessive colli-
sions, including:
▼
Workstation cables exceeding the maximum length of 100 meters
▼
A total network diameter exceeding the maximum 205 meters
▼
Faulty Fast Ethernet adapters or other equipment on the network