Instruction manual

8
Installation Troubleshooting
• During installation, test the fiber and twisted pair connections with all
troubleshooting features disabled, then enable these features, if desired, just
before final installation. This will reduce the features’ interference with testing.
• LEDs will only function after both twisted pair and fiber are connected.
• To test a module by itself, be sure to have an appropriate fiber patch cable, then
follow these steps to test:
Step 1 Connect the media converter to the twisted pair device
with a twisted pair cable. The device must be
configured to force 100FDX.
Step 2 Loop a single strand of fiber from the transmit port to
the receive port of your media converter.
Step 3 Verify that the LNK LED lights for both twisted pair and
fiber link.
WARNING
It is possible to create a network loop if connecting the module’s twisted pair
port to an active network. Be sure to connect the twisted pair cable to a PC
when performing this test.
• Make sure to use the appropriate twisted pair cable, and have the
crossover/pass-through switch set correctly if a network’s converter does not
include AutoCross.
• If using a high powered device, which is designed for long distance installations
for a short distance installation, the fiber transmitters may overdrive the receivers
and cause data loss. In such a case, add an optical attenuator to the connection.
Since single-strand fiber products use optics that transmit and receive on two different
wavelengths, single-strand fiber products must be deployed in pairs, or two
compatible IMC Networks single-strand fiber products must be connected. The two
connected products must also have the same speed and distance capabilities (i.e.,
both are single-mode [20km] or both are single/PLUS [40km]).