Allied Telesis AT-8648T/2SP Spécifications télécharger pdf (Page 28)

28 AT-8600 Series

C613-03080-00 REV G

Common Problems and Solutions

Power LED is off If the power LED is off, it may indicate the following:

■ a loose power cord

■ a power supply failure

Perform the following steps in sequence:

1. Check that the power cord connections are secure.

2. Check that all switches and circuit protection devices are in the ON position.

3. Ensure that the supply voltage is within the operational range (110/240

VAC 50/60 Hz).

L/A LED on a port

is off

If the Link/Activity LED is off, it may indicate the following:

■ a loose data cable

■ the device at the other end of the connection is not working properly or is

turned off

■ the data cable is not wired correctly

■ the network administrator has manually disabled the port through the

software

■ the port’s selected transmission mode does not match that of the attached

device

Perform the following steps in sequence:

1. Make sure the data cable connections are secure.

2. Make sure the device at the other end of the connection is switched on and

working properly.

3. Check that the data cable is wired correctly.

4. If you can, log in and check the port status. Refer to the Installation and

Safety Guide for basic login instructions or to the Getting Started chapter in

the Software Reference.

5. If the port is enabled, make sure the transmission speed matches that of the

connected device (auto-negotiating, full or half-duplex).

If the port is disabled, someone has used the software to manually disable

it. You should find out why the port was disabled before enabling it.

Fault LED is on If the fault LED is on, it may indicate the following:

■ there is a problem with the switch or RPS PSU

■ the switch or management software is malfunctioning

■ a hardware fault is preventing switch start-up

Perform the following steps in sequence:

1. Check “System LEDs” on page 7 for descriptions and explanations of LED

flashing sequences.

2. Restart the switch by entering the RESTART REBOOT command.

3. If you were attempting to download software or manage the switch via the

RS-232 terminal Port, check that connections between the Terminal Port and

local terminal or PC are secure.

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