Allied Telesis AT-MC303 - Manual (Page 26)

16
Troubleshooting
This section contains guidelines for troubleshooting the media converter. If a
problem occurs, set the M/L ON/LNK TST button to the Link Test mode
(OUT) position and then follow the instructions in this section.
If the PWR LED is OFF, verify the following:
❑
The power cord is securely connected to the power supply on the rear
panel of the media converter and to the power outlet.
❑ The power outlet has power. If necessary, test the power outlet by
connecting another device to it.
❑
The input power source is within the acceptable range for your area.
If the LNK LED for the fiber optic port is OFF, verify the following:
❑
The node connected to the port is powered ON.
❑ The fiber optic cable is securely and properly connected to the fiber
optic port. (The near end node transmitter (TX) cable should be
connected to the far end node receiver (RX) and vice versa.)
❑
The node connected to the fiber optic port is operating at 100 Mbps.
❑
The correct type of fiber optic cabling is being used to connect the end
node to the media converter (refer to Table 4 on page 11).
❑
The maximum allowable operating distance has not been exceeded.
(Refer to Table 4 and Table 5 on page 12.)
❑
The maximum allowable loss budget on the fiber optic cable is within
acceptable limits for full-duplex operation. (Refer to Table 4 on page
11.)
Note
In a back-to-back configuration where two media converters have been
interconnected via their fiber optic ports and the units are not in Link
Test mode, the LNK LEDs for the fiber optic ports will be OFF if the
connection to either end node (such as a switch or hub) is lost.