Allied-telesis AT-MR820TR Manual de usuario descargar pdf (Pagina 35)

AT-MR420TR and AT-MR820TR Installation Guide

Occasional collisions are normal in Ethernet networks. A constantly illuminated Collision

LED may indicate that there is a prt with excessive trafﬁc problems. If the Collision LED is

ﬂashing steadily, and you are using an external transceiver on the AUI backbone port, make

certain that the SQE/Heartbeat Test function is disabled. Repeaters do not function properly

when the SQE/Heartbeat Test is active.

System Check

1. Check the LINK OK LED on the front panel for the ﬁrst 10Base-T

port that is connected. A steady green LED indicates continuity. A

valid network connection must be made from the connected port to

a host or workstation on another port.

2. After a successful connection, disconnect the active 10Base-T

connector and connect it to the next successive port. Continue this

process until all 10Base-T ports have been validated with good

network connections.

3. Establish a connection from a device connected to port 1 to a device

connected to port 2.

4. Once the connection between devices attached to ports 1 and 2 has

been successfully established, remove the RJ45 connector from port

2 and connect it to each of the subsequent repeater’s 10Base-T

ports, 3 through 4/8, to verify their functions.

5. If all ports test successfully, install the rest of the 10Base-T RJ45

connections and ensure that the LINK LED for each port is

illuminated. Remember, the 10Base-T device on the opposite end of

the STP/UTP cable must be operational.

Table 1: Hub Status LEDs

LED Color Description

Power green lights when AC power is applied

Collision

amber ﬂashes indicating an SQE or frame collisions on a

segment. This may be caused by an overloaded

segment, faulty cable, or loose connection.

Activity green indicates that the repeater is functional and is

transmitting packets

MRx20TR(STP/UTP)_BookA Page 13 Thursday, April 3, 1997 5:24 PM

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Allied-telesis AT-MR820TR Manual de usuario Pagina 35