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FT14 and FT14H 10Mb Media Converters Installation and User Guide (09/04)
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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.
Twisted Pair
Two Link LEDs, one for each
Ma
FT1
di
g
a
n um
4
Me
TX
RX
9
DC
.3
A
M
P
UP LIN
K
Li
n
RX
/
C
AI
RX
A
C
Li
n
P
wr
FIBER
TWISTED P
R
Lin
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 2 0 21 22 2 3 24
k
An/FF
Rx
Ac
Lin
t
/A
c
k
1 2 3 4 5 6 7 8 9
Fiber
C ble segments RJ-45 & Fiber
a
-
When a twisted-pair to fiber media converter is introduced, the FT14 regular
models of these products (not
the Magnum FT14H’s) treat each attached cable segment
as a separate entity. LEDs on
the FT14 Media Converters
separately indicate LINK on
each port, enabling an installer
to see the LINK (or no-LINK)
status of each port and each
piece of cable independently.
This is nice for the network
installer, but it introduces a
discontinuity for the managed
network software which wants
to “see through” the media
converter, treating it as part of