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Understanding the 499NTR10100

Goals and Symptoms

This document is to assist users and Schneider Electric Personnel in setting up and troubleshooting system that employ the 499NTR10100 Transceiver

Causes and Fixes

These units are "passive link".
What this means is that the copper sides of the link need to be 100mbps
FIXED and preferably Full Duplex FIXED otherwise No Link hence the Fault

If the devices attached to the copper ports are set to "autonegotiate",
this will not work, again a Fault LED!!

Ensure that the Fiber wires are attached with the
proper polarity.

If some or none of the conditions mentioned are met, this absolutely
will not work; all the conditions must be met. Once they have all of
these criteria met, recycle power to the Transceivers.

Now, this is all assuming that these devices are not talking at all. If
they are talking and it is simply a fault light that is on, there are
only 2 reasons there will be a fault light on:

1. Link Status
2. No Power to one of the inputs.


1. Set all copper ports attached to the Transceiver to 100mbps
Full/Duplex fixed.
2. Ensure all fiber connections have "Transmit" going to the opposite
"Receive" and vice versa.
3. Turn off both DIP switches as these will NOT affect comms. Only turn
them on once all links have been established and verified.

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