GarrettCom TF14 - Manual (Page 25)

Magnum “14” 10Mb Media Converters Installation and User Guide (04/01)
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2.5 Full / half-duplex applications.
Of the various 10Mb media types, only the twisted-pair to fiber combination is
capable of full-duplex (i.e., simultaneously transmitting and receiving on the same cable
segment) operation. Full-duplex is rarely required at 10Mb, but might occasionally be
desired to connect a 10Mb RJ-45 Switching Hub port over a fiber link to a full-duplex
RJ-45 NIC in a remote server, or to connect one port of a full-duplex Switching Hub via
fiber to another full-duplex 10Mb RJ-45 Switching Hub port.
All the TF14-series operate in transparent half-and full-duplex mode. For half-
duplex traffic, the TF14-series work correctly but do not detect or indicate collisions.
2.6 Link Pass-through applications.
In managed networks, the LINK signal on a managed switch (or hub) port is
used as an indicator that the attached cable segment is installed and operable. The
network manager, using the SNMP agent, can troubleshoot the cabling by examining the
LINK status on each port. This works fine as long as all of the cabling is twisted pair.
When a twisted-pair to fiber media converter is introduced, the standard models
of these products (such as the Magnum TF14) treat each attached cable segment as a
separate entity. The LEDs on the media converter separately indicate LINK on each port,