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4 MAINTENANCE
4.3
MULTICHANNEL MEDIA CONVERTER
3. Are Channel Links Good?
If the T-LNK LED for a twisted pair port is OFF:
• Ensure the network device connected to the twisted-pair
channel port is powered ON.
• Ensure that the twisted-pair cable is connected securely both
to the channel port and to the network device.
• If the network device connected to the port is a workstation,
ensure that the cable is in the crossover configuration.
• If the network device connected to the port is a hub or
switch, ensure that the cable is in the straight-through
configuration.
• Ensure that the network device connected to the port is
operating at correct speed: 10 Mb/s or 100 Mb/s.
If the F-LNK LED for a fiber optic port is OFF:
• Ensure that the network device connected properly to the
fiber-optic port is powered ON.
• Ensure that the fiber-optic cable is connected to the fiber-
optic port and to the network device.
• Ensure that the network device connected to the fiber-optic
port is operating at correct speed: 10 Mb/s or 100 Mb/s.
• Set the Link Test switch(es) to TEST position (to isolate fiber
link faults from faults on the twisted-pair network).
Allow 5-10 seconds for all devices to link-up. All LNK LEDs
should illuminated
NOTEL Remember to reset Link Test switch(es) to NORMAL
after procedure is completed
• Verify that the maximum allowable loss budget on the fiber-
optic cable is within acceptable limits.
If a LINK LED of a port is illuminated but there is a
communication problem with the port:
• Ensure that the duplex setting is set the same on the nodes
connected to the twisted-pair and to the fiber-optic ports of
the media converter channel.
If all LNK LEDs are OFF but all network decices and fiber-optic
cable are connected, a link-up problem is suspected:
• Contact TRANSITION Networks Technical Support.