KTI Networks DH-8T - Manual (Page 14)

Collision LED
This LED indicates the collision detected by the hub. The LED is
normally off and it blinks when there are collisions. As the frequency
of collisions on a network increases, the blink activities (on-time) of
the LED also increase.
Link/Rx LED
Each TP port has one Link/Rx LED to indicate the link status and
receiving activities of the connection to the attached device.
State Indication Interpretation
On Normal the UTP link is in good condition and no
receiving activities are present.
Blink Normal the UTP link is in good condition and
there receiving activities are present.
Off Normal No active device is connected at the
other end of the UTP link.
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