Power check, Is the link/activity led illuminated – Allied Telesis AT-MR912TX User Manual

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Troubleshooting

Power Check

Check the power (PWR) LED on the front of the AT-MR912TX. This green
LED should be illuminated.

If the power LED is not on, check both ends of the AC power cord. Make sure
the power cord is plugged into a functioning wall outlet and that it is properly
inserted into the AT-MR912TX power receptacle on the back of the unit.

Note

There is no “power” switch on the AT-MR912TX per se. If the power
cord is properly connected, the hub should be receiving power.

Is the Link/Activity LED illuminated?

The Link/Activity LEDs on the front of the AT-MR912TX will illuminate when
a proper connection between the corresponding 100Base-TX port and the
equipment connected to it is established. If this LED is not illuminated, check
for the problems listed below and make corrections as necessary.

Problem 1:

The cable has been cut, damaged, or is the wrong type of cable.

❑

Solution 1:

— Try making the connection with a different cable. Be sure you are

using an undamaged cable of the correct type.

Problem 2:

Connected equipment is not turned on or not operating properly.

❑

Solution 2:

— Check the connected equipment (computer, another hub, etc.) and

turn on the power.

Problem 3:

There is signal loss between the hub and one of the attached network
nodes.

❑

Solution 4:

— Make sure the distance between the hub and the connected network

device is no greater than 100 meters.

— Make sure you are using Category 5 cable.