N-Tron 102MC User Manual & Installation Manual - page 11
(Revised 2010-11-15)
11
CONNECTING THE UNIT
For the 10Base-FL Fiber Optic port, remove both of the dust caps from the fiber optic connectors and
connect the fiber optic cables. The TX port on the local unit should be connected to the RX port of the far end
device, and the RX port should be connected to the TX port of the far end device.
For 10Base-T port, plug a Category 3 or better twisted pair cable into the RJ45 connector. Connect the
other end to the far end device. Verify that the LNK LED’s are ON once both the fiber and the copper are
linked. The MDIX mode of the 102MC can be changed using jumper J3 on the board. By factory default the
device is set up to use a straight through cable for a PC. Any N-Tron switch will automatically determine what
MDIX the 102MC is using and will connect it to the network.
Warning: Creating a port to port connection on the same switch (i.e. loop) is an illegal operation and will
create a broadcast storm which will crash the network!
Note: The 102MC is a transparent media converter. Both the fiber port and the copper port must be linked in
order for the unit to display any link status on the link LEDs. At least one of the two ports must be hard set to
10Base (if the fiber device is 10Base-FL then it is automatically set to 10Base).
TROUBLESHOOTING
1. Make sure the (Power LED) is ON.
2. Make sure you are supplying sufficient current for the version chosen. Note: The Inrush current will
exceed the steady state current by ~ 2X.
3. Verify that Link LED’s are ON for both ports.
4. Verify cabling used between stations.
5. Verify that cabling is Category 3 or greater for 10Mbit Operation.
6. The 102MC is a transparent media converter; if one side isn’t linked properly both ports will not indicate
a valid link.