Allied-telesis AT-FS724 Instrukcja Użytkownika Pobierz pdf (Strona 45)

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3-5

❑

If the port is

Disabled

, someone has manually disabled the

port for a specific reason. Verify that the reason no longer

exists before you enable this port.

5. Verify that the Link LED is On. For the AT-FS718 with the AT-A11,

the transmit pair must be connected to the receive pair on the

attached device. If the Link LED is

Off

, reverse the transmit and

receive pair at the attached device.

6. Contact Allied Telesyn Technical Support for help.

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If there is no power to the switch, it cannot function.

POWER

LED that is

off

may indicate:

❑

A loose power cord.

❑

Power supply failure, malfunction, or loss of power to the

power supply.

❑

A power supply voltage below acceptable levels.

❑

A high switch temperature due to fan failure or ambient

temperature extreme.

Perform the following steps in sequence; you need not proceed to

the next step if the problem is resolved:

1. Secure the power cord to the power source and check the

POWER

LED to see if it is

2. Ensure that the voltage is within the required levels in your region.

3. Contact Allied Telesyn Technical Support for help.

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This might indicate a problem with the switch, such as:

❑

Power-on diagnostics has failed

Perform the following steps in sequence; you need not proceed to

the next step if the problem is resolved:

1. Reset the switch by pressing the

RESET

button on the front panel.

2. Make sure the RS232 connection from the local terminal or PC to

the switch is secure; change the cable if necessary.

3. Unplug the switch from the power source, then plug it back in

again.

4. Contact Allied Telesyn Technical Support for help.

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