IMC Networks MediaConverter 1, Руководство по эксплуатации

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15
Installation Troubleshooting
The following information assists in troubleshooting the Modular Media Converters:
• During installation, first 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.
• When working with units where the features cannot be connect, establish BOTH
the twisted pair and fiber connections in order to establish link LEDs.
• To test a media converter by itself, have an appropriate fiber patch cable, then
follow these steps to test:
1. Connect the media converter to the twisted pair device with a twisted pair cable.
2. Loop a single strand of fiber from the transmit port to the receive port of the
media converter.
3. Verify that both the twisted pair and the fiber link (see LEDs, below) on the
media converter.
NOTE
Use caution when conducting a loopback test; it is possible to create a network loop if
connecting the twisted pair port to an active network switch. IMC Networks
recommends connecting the twisted pair cable to a PC for this type of test.
• Make sure to use the appropriate twisted pair cable, and have the
crossover/straight-through switch set correctly if the media 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. If this is the case, an optical attenuator may need to be
added to the connection.