S2MM Module Sets
use LED transmitters and are available for the
following conversions:
S2MM1300 Module Set
(LE740-SMMM2) — converts 1300-nm single-
mode to 1300-nm multi-mode fiber (ST)
S2MM1300/PLUS Module Set
(LE740-SMMM) — same as above
only single-mode has higher power budget
NOTE: 10 Mbps Modules, 100 Mbps Modules and S2MM Module Sets will be
referred to as “Media Conversion Modules” throughout the rest of this document
except where differences need to be indicated.
Configuring Media Conversion Modules
Before installing, media conversion modules with twisted pair ports may
be configured for
LinkLoss
and/or either a crossover workstation or pass-
through repeater/hub connection (10 Mbps only). Media conversion
modules with fiber ports may be configured for
FiberAlert
. Port termination
may need setting on
10 Mbps Modules
with BNC ports.
10BT (RJ-45) -
10BFL Modules
have two additional jumpers, one for shielded/unshielded
twisted pair and one for longer twisted pair distances. 100 Mbps modules
may be configured for
Autonegotiation
.
S2MM Modules Sets
come ready to
install.
The following diagrams show where the jumpers and switches are
located on the various media conversion modules.
NOTE: Some features may not be available on all versions of media conversion
modules.
TP
Crossover Switch (S1)
Pass-Through/
S1
S1
Crossover
Pass-Through
Default
BNC Termination
Jumper (JP1)
Default
OFF
ON
10BT (RJ-45) - 10B2 (BNC)
BNC Termination
Jumper (JP2)
FiberAlert
Jumper (JP3)
Default
Default
OFF
ON
10B2 (BNC) - 10BFL
100BTX - 100BFX
Fiber Alert Jumper (JP1)
Autonegotiation Jumper (JP2)
FX LinkLoss Jumper (JP3)
TX LinkLoss Jumper (JP4)
Default
Disabled
Enabled
TP
Crossover Switch (S1)
Pass-Through/
Crossover
Default
S1
S1
Pass-Through
10BT (RJ-45) - 10BFL
Fiber Alert Jumper (JP1)
TP LinkLoss Jumper (JP2)
Twisted Pair
Distance Jumper (JP3)
3
4
Twisted Pair Crossover/Pass-Through Switch
All
10 Mbps Modules
with twisted pair ports have one RJ-45 connector
for a single shielded or unshielded twisted pair link segment. Each twisted
pair port features a 2-position switch, located at position S1, for selecting a
crossover workstation connection or pass-through repeater/hub connection.
The switch is labeled with “X” for a crossover connection (factory default)
and a “ll” for a pass-through connection. To select the appropriate setting,
simply move the switch to the proper position before installing the media
conversion module. If uncertain whether crossover or pass-through is
needed, set the switch to the position that makes the link LED glow.
Twisted Pair Cable Type
The twisted pair port on
10BT (RJ-45) - 10BFL Modules
features a
2-position jumper, located at position JP3, for selecting either a shielded or
unshielded twisted pair link segment. The jumper is labeled with “STP IN”
and “UTP OUT”. An unshielded twisted pair link segment (factory default)
is selected when the shunt is removed or on only one pin. Place the shunt
over both pins for a shielded twisted pair link segment.
Twisted Pair Cable Distance
The twisted pair port on
10BT (RJ-45) - 10BFL Modules
features a
2-position jumper, located at position JP2, for selecting longer twisted pair
cable distances (distances greater than 100 meters). The jumper is labeled
with “NORMAL IN” and “LONG OUT”. Place the shunt over both pins for
distances up to 100 meters (factory default). Remove the shunt or place it
on only one pin for distances of 100 meters or more.
NOTE: The product on the other side of the conversion must be able to support
longer cable distances as well.
About LinkLoss and FiberAlert
Some of the aforementioned media conversion modules come with the
following troubleshooting features:
•
FO/FX LinkLoss
(a.k.a. "
Fiber LinkLoss
" or "
LinkLoss
")
•
TP/TX LinkLoss
(a.k.a. "
Twisted Pair LinkLoss”
or "
Reverse LinkLoss”
)
•
FiberAlert
FiberAlert
and
LinkLoss
are advanced troubleshooting features that can
help you locate "silent failures" on your network. However, it is vital that
you understand exactly how
FiberAlert
and
LinkLoss
work, and how they
will react in your network configuration, before attempting to install the
enclosed module(s).
