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Black Box Corporation • 1000 Park Drive • Lawrence, PA 15055-1018 • Tech Support: 724-746-5500 • www.blackbox.com • e-mail: info@blackbox.com
© 2004. All rights reserved.
Black Box Corporation.
10/8/2004 #10054
Convert 100BASE-TX
to single-strand
100BASE-FX.
Double your fiber
capacity without
pulling more cable.
Fiber distances up to
40 km (24.9 miles) with
Plus SC models.
Configure
automatically for
correct UTP cabling.
Autonegotiates
for full-duplex.
Replacement units
available.
Internal, autosensing
power supply.
M
inimize the amount of fiber
optic cabling you need in your
new or existing installation with
BLACK BOX
®
Single-Strand Fiber
Media Converters.
They’re ideal for fiber-tosubscriber service providers,
enterprise LAN networks, or just
about any application where fiber
optic cabling is in short supply
or too expensive to add. Use the
converters, for instance, in a
campus environment to double
fiber capacity without pulling new
cable.
The standalone converters
perform copper-to-fiber conversion
(100BASE-TX twisted pair to
100BASE-FX single-strand fiber) in
a most economic way. They enable
two individual data channels to
share one strand of fiber, so you
can essentially double the capacity
of your single-mode fiber optic
cable or reduce the amount of fiber
cable you need by one-half.
How does it work? Well, typical
duplex fiber depends on a separate
connector for transmit and receive
Cut your fiber optic cable costs!
Send data across one duplex fiber.
Key Features
SINGLE-STRAND FIBER MEDIA CONVERTERS
optics, so it requires fiber to run in
pairs. Single-strand fiber, however,
uses optics that transmit and
receive on two different
wavelengths— in this case, 1310
and 1550 nm. Each individual
wavelength carries a different
signal (TX data and RX data) and,
as long as you have
complementary transmit and
receive optics at each end of the
cable, you can send data over a
single-fiber run. To perform this
wavelength duplexing, you must
use the Single-Strand Fiber Media
Converters in pairs (or connect one
converter to a precisely compatible
single-strand product, such as
LMC5112C).
IEEE 802.3-compliant, each of
these Layer 1 media converters has
an RJ-45 connector for copper
input and an SC connector for
linking to a fiber segment. With the
Plus SC models, you can extend
your 100-Mbps Ethernet network
up to 40 km (24.9 miles) over fiber
optic cable. The regular SC models
support 20-km (12.4-mile) distances
over fiber. Order an SC or a Plus SC
matched-pair kit now, and if either
of the included units becomes
defective, order a single unit as
a replacement.
The matched-pair units ship to
you ready to install. About all you
have to do is consider each one for
LinkLoss™, which notifies you of
“silent failures” in your network
and helps you save time when
troubleshooting.
With LinkLoss, a copper or fiber
link can be checked by physically
observing the status of a frontpanel LED. It not only informs you
that a converter unit is receiving
valid link pulses from a connected
device, but you know that the
converter’s link pulses are being
received at other end. The latter
function is handy in situations
where you’re unable to see a
remote device’s LED to ensure that
it’s receiving link integrity pulses.
Essentially, with LinkLoss the link
status of one segment is always
mirrored on the opposite segment.
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• (1) or (2) matched standalone
media converters
• (1) or (2) power cords
• Users’ manual
Approvals: FCC Part 15, Subpart B
Class A; UL
®
; CSA; CE
Distance (Maximum): LHC5128A,
LH5129A-R3–LHC5130A-R3:
20 km (12.4 miles) on fiber side;
LHC5131A, LH5132A-R3–
LHC5133A-R3: 40 km (24.9 miles) on
fiber side
NOTE: Distances depend on actual
fiber budget and installation loss.
Ethernet Type: 100-Mbps Ethernet
Fiber Optic Characteristics:
TX minimum: -15;
Average TX launch: -11;
TX maximum: -7;
RX sensitivity (dBm): -33;
Average budget (dB): 22
Fiber Optic Type: Single-mode
Fiber Wavelength: LHC5128A,
LHC5131A: (1) 1310-nm transmit/
1550-nm receive unit and
(1) 1550-nm transmit/1310-nm
receive unit in a matched set;
LHC5129A-R3, LHC5132A-R3:
(1)1310-nm transmit/1550-nm
receive unit;
LHC5130A-R3, LHC5133A-R3:
(1) 1550-nm transmit/1310-nm
receive unit
Connectors: Each standalone unit:
(1) RJ-45; (1) SC or Plus SC; (1) IEC
3-prong power receptacle
Indicators: (4) LEDs: FX RCV (fiber
optic port receive data), TX LNK
(twisted-pair link established),
FX LL (LinkLoss enabled); FX LNK
(fiber optic link established)
Temperature Tolerance:
Operating: 32 to 122ºF
(0 to 50ºC);
Storage: 0 to 160ºF
(-18 to +71ºC)
Power: Internal 100–240 VAC,
50– 60 Hz, 0.1/0.05 A on an IEC-320
connector
Size: Each standalone unit:
1.5"H x 4.7"W x 4.9"D
(3.8 x 11.9 x 12.4 cm)
Weight: 1.3 lb. (0.6 kg)
Package Includes:
Typical Single-Strand Fiber Media Converter Application
Ethernet
Switch
Ethernet
Switch
CAT5 Cable
CAT5 Cable
RX 1310
RX 1550
TX 1310
TX 1550
Single-Mode Fiber Optic Cable
up to 20 km (on SC models) or
40 km (on Plus SC models)
Single-Strand Fiber
Media Converter
(1310 TX/1550 RX)
Single-Strand Fiber
Media Converter
(1550 RX/1310 TX)
Specifications
Ordering Information
ITEM CODE
Single-Strand Fiber Media Converters
SC (up to 20 km)
Matched Set of (2) Standalone Units.................LHC5128A
(1) Standalone Unit
1310 TX/1550 RX....................................LHC5129A-R3
1550 RX/1310 TX....................................LHC5130A-R3
Plus SC (up to 40 km)
Matched Set of (2) Standalone Units.................LHC5131A
(1) Standalone Unit
1310 TX/1550 RX....................................LHC5132A-R3
1550 RX/1310 TX....................................LHC5133A-R3
If, for example, a fault occurs
on a converted fiber segment, FX
LinkLoss™ detects the fault and
passes this information to the
twisted-pair segment. It then
disables the twisted-pair port’s
transmitter, resulting in a loss of link
on the device connected to that
port. TX LinkLoss performs a similar
function, detecting faults on
twisted-pair segments and passing
this along to the fiber port.
With autonegotiation enabled,
the converter negotiates as a
100-Mbps full-duplex device and,
if the connected device can
operate at that speed and duplex,
it establishes a link.
To activate FX LinkLoss and
autonegotiation functions, simply
flip a switch on the faceplate of the
converter. Internal jumpers control
TX LinkLoss.
For diagnostic and monitoring
purposes, each Single-Strand Fiber
Media Converter has four LEDs:
• FX RCV turns yellow when
the fiber port receives data.
• TX LNK turns green when
the converter establishes a
twisted-pair link.
• FX LL turns green when you
enable FX LinkLoss.
• FX LNK turns green when
the converter establishes a
fiber link.
Compact yet durable, the
converter‘s design benefits from a
metal casing and four preinstalled
rubber feet for placing the unit on
a desktop. And because its
autosensing, universal power
supply is internal, there’s no bulky
transformer to crowd your work
space further.
Plus, you won’t need any
crossover cables to complicate
connections at the 100BASE-TX
port. You can get away with using
straight-through cabling only
to connect your copper devices.
That’s because the converter has
an MDI/MDIX function that
automatically determines whether
the converter has to cross over
between the four pairs on the
RJ-45 connector. Depending on the
connected device, a Single-Strand
Fiber Optic Converter selects
between a crossover workstation
or passthrough repeater or hub
connection.
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