User’s Manual
32
z
Link LED
(Yellow): The Link LED is located on the left part of the port. It is
associated with the RJ-45 phone jack to indicate whether the twisted pair
link connected. When there is no coming network data packet on the jack,
the jack will start to detect periodical link-integrity pulses which should be
sent by the device connected at the other end of the link, on the received
pair of the twisted-pair cable. If link-integrity pulse is not detected, there is
a link failure and the Link LED will be turned off and the transmit and receive
functions of the jack will also be disabled. Table shows all the status of the
Link LED, it is useful as a trouble-shooting aid. Match the activity of LED on
the port with one of the status indicated in the table.
z
Activity LED
(Green): The activity LED is located on the left part of the
port. It indicates the activity (transmit data) status of the system. The LED
Off
State
On
Description
z
Normal data packet are received or link-integrity pulse is detected.
z
When no twisted-pair connected.
z
When link test is disabled.
z
No power source into Hub.
z
Twisted-pair is faulty.
z
Non 10Base-T or non 100Base-TX device connected at the other
end of the twisted-pair.
z
A twisted-pair wire exceeds the recommended length (Maximum
length is 100 meters).
Activity LED
(Green)
Link LED
(Yellow)
