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Black Box Modular Switches
Installation and User Guide (8/99)
40
LE1423C is a 4-port multi-mode fiber FX “small-form-factor” VF-45 connector used
primarily in 100Mbps fiber
-to-the-desktop links. Its size is similar to the MT-RJ port, but the
VF
-45 shell is slightly larger. When not in use, its appearance is distinctive because it has a tiny
hinged door over the port hole to act as a dust cover.
When installed in a LE14XXA-Series
Modular Switches at full
-duplex, it supports fiber
optic cable distances up the IEEE
-standard 100Mbps
distance limits, i.e., typically 2 km at full
-duplex and
412m on half
-duplex.
The small size, about the same as an RJ-45,
reduces the size of wiring panels in wiring closets
while providing the advanta
ge of “future-proof” fiber
optic technology.
The cable port is a “plug-in” connector, with
both fiber strands terminated in one housing that cannot be improperly inserted. The module is
equipped with a LINK (LK) LED to indicate proper connectivity with the
remote device, an
ACTIVITY (ACT) LED that flashes to show when Fast Ethernet packets are being received and
a (FDX/HDX) LED indicate the full
-duplex mode when lit (or half-duplex when off).
5.2.6
LE1425C (Twisted Pair), 10/100Mb TP 4-Port
The LE1425C module supports Ethernet twisted pair segments of any standard length.
It is equipped with 4
-port RJ-45 connector with 10/100 and auto-negotiating capability on each
port. The RJ
-45 connector is shielded to minimize emissions and will allow both unshielded
twiste
d pair (UTP) and shielded twisted pair (STP) cable connections.
The LE1425C 4-port module is equipped with a Media Dependent Interface-
Crossover (MDI
-X) push-button to allow for one cascaded connections. This feature eliminates
the need for a special twisted pair crossover
cable when connecting to a hub or another
switch.
With the push-button in the IN (X)
position, the PM
-TP port is used for
cascaded and up
-link connections (i.e.: a
100BASE-FX MV45
Connectors
“small-form-factor”
1
ACTIVITY
LINK
2
FULL/HALF
DUPLEX MODE
ACT
LK
FDX/HDX
1
2
3
1
2
3
4
3
10/100BASE-T,4Port
RJ-45 Connectors
4
FULL/HALF
1
ACTIVITY
LINK
2
1
2
4
3
Cross-Over
Push Switch
100/10 FDX/HDX
LK
x
ACT
3
SPEED
1 2 3 4