Allied Telesis AT-MC103ST/FSx - Manual (Page 29)

AT-MC100 Series Installation Guide
17
Loopback Test
To check hardware reliability of the media converter, perform the following
procedure:
1. Power OFF the media converter by unplugging the power adapter from
the wall outlet and from the back of the unit.
2. Connect the RJ-45 twisted pair port to a 100Base port on the end-node
and power ON the end-node.
3. Set the MDI/MDI-X button as follows:
❑ If you are connecting a workstation to the 100Base port, set the MDI/
MDI-X button to the MDI-X (OUT) position. MDI-X is the default
position.
❑ If you are connecting a hub or a switch to the 100Base port, set the
MDI/MDI-X switch to the MDI (IN) position.
4. Using a tested and good fiber patch cable, attach the matching ends of the
fiber cable to the transmit (TX) and receive (RX) connectors of the media
converter.
5. Set the media converter to the LNK TST(OUT) position.
6. Power ON the media converter.
7. Verify that the LNK LED on both the twisted pair and fiber optic ports
are green.
❑ If the LEDs are green, the unit is working properly and there is a
problem elsewhere on the segment.
❑ If the LEDs are OFF, contact Allied Telesyn Technical Support for a
RMA number to replace the unit. Refer to “Returning Products” on
page xi for more information. You can also find RMA information by
accessing the Knowledge Base at http:\\kb.alliedtelesyn.com.