Black Box LB401A Instruction manual

High Speed
Ethernet Extender
This is a Class A device and is not intended for use in a
residential environment.
MARCH 2011
LB400A-R2

HIGH SPEED ETHERNET EXTENDER
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CE NOTICE
The CE symbol on your Black Box equipment indicates that it is in compliance
with the Electromagnetic Compatibility (EMC) directive and the Low Voltage
Directive (LVD) of the European Union (EU). A Certificate of Compliance is
available by contacting Technical Support.
RADIO AND TV INTERFERENCE
This device generates and uses radio frequency energy, and if not installed and
used properly-that is, in strict accordance with the manufacturer’s instructions-
may cause interference to radio and television reception. The device has been
tested and found to comply with the limits for a Class A computing device in
accordance with specifications in Subpart B of Part 15 of FCC rules, which are
designed to provide reasonable protection from such interference in a commer-
cial installation. However, there is no guarantee that interference will not occur in
a particular installation. If the device does cause interference to radio or televi-
sion reception, which can be determined by disconnecting the unit, the user is
encouraged to try to correct the interference by one or more of the following
measures: moving the computing equipment away from the receiver, re-orienting
the receiving antenna and/or plugging the receiving equipment into a different
AC outlet (such that the computing equipment and receiver are on different
branches).
WARNING
Theis device is NOT intended nor approved to be con-
nected to the PSTN. It is intended only for connection to
customer premise equipment.

HIGH SPEED ETHERNET EXTENDER
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WARNING
This device contains no user serviceable parts. This
device can only be repaired by qualified service per-
sonnel.
• Do not open the device when the power cord is con-
nected. For systems without a power switch and without
an external power adapter, line voltages are present
within the device when the power cord is connected.
• For devices with an external power adapter, the power
adapter shall be a listed Limited Power Source. The
mains outlet that is utilized to power the device shall be
within 10 feet (3 meters) of the device, shall be easily
accessible, and protected by a circuit breaker in com-
pliance with local regulatory requirements.
• For AC powered devices, ensure that the power cable
used meets all applicable standards for the country in
which it is to be installed.
• For AC powered devices which have 3 conductor
power plugs (L1, L2 & GND or Hot, Neutral &
Safety/Protective Ground), the wall outlet (or socket)
must have an earth ground.
• For DC powered devices, ensure that the interconnect-
ing cables are rated for proper voltage, current, antici-
pated temperature, flammability, and mechanical
serviceability.
• WAN, LAN & PSTN ports (connections) may have haz-
ardous voltages present regardless of whether the
device is powered ON or OFF. PSTN relates to inter-
faces such as telephone lines, FXS, FXO, DSL, xDSL,
T1, E1, ISDN, Voice, etc. These are known as “hazard-
ous network voltages” and to avoid electric shock use
caution when working near these ports. When discon-
necting cables for these ports, detach the far end con-
nection first.
• Do not work on the device or connect or disconnect
cables during periods of lightning activity.

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TRADEMARKS USED IN THIS MANUAL
All applied-for and registered trademarks are the property of their respective owners.
NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY STATEMENT
Instrucciones De Seguridad
1. Todas las instrucciones de seguridad y operación deberán ser leídas antes
de que el aparato eléctrico sea operado.
2. Las instrucciones de seguridad y operación deberán ser guardadas para ref-
erencia futura.
3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de
operación deben ser respetadas.
4. Todas las instrucciones de operación y uso deben ser seguidas.
5. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo, cerca
de la tina de baño, lavabo, sótano mojado o cerca de una alberca, etc.
6. El aparato eléctrico debe ser usado únicamente con carritos o pedestales
que sean recomendados por el fabricante.
In accordance with the requirements of council direc-
tive 2002/96/EC on Waste of Electrical and Electronic
Equipment (WEEE), ensure that at end-of-life you sepa-
rate this product from other waste and scrap and deliver
to the WEEE collection system in your country for recy-
cling.
WARNING
Electrostatic Discharge (ESD) can damage equipment
and impair electrical circuitry. It occurs when electronic
printed circuit cards are improperly handled and can
result in complete or intermittent failures. Do the fol-
lowing to prevent ESD:
• Always follow ESD prevention procedures when
removing and replacing cards.
• Wear an ESD-preventive wrist strap, ensuring that it
makes good skin contact. Connect the clip to an
unpainted surface of the chassis frame to safely chan-
nel unwanted ESD voltages to ground.
• To properly guard against ESD damage and shocks,
the wrist strap and cord must operate effectively. If no
wrist strap is available, ground yourself by touching the
metal part of the chassis

HIGH SPEED ETHERNET EXTENDER
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7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea
recomendado por el fabricante.
8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más
allá a lo descrito en las instrucciones de operación. Todo otro servicio
deberá ser referido a personal de servicio calificado.
9. El aparato eléctrico debe ser situado de tal manera que su posición no interfi-
era su uso. La colocación del aparato eléctrico sobre una cama, sofá, alfombra
o superficie similar puede bloquea la ventilación, no se debe colocar en libre-
ros o gabinetes que impidan el flujo de aire por los orificios de ventilación.
10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor
como radiadores, registros de calor, estufas u otros aparatos (incluyendo
amplificadores) que producen calor.
11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del tipo
descrito en el instructivo de operación, o como se indique en el aparato.
12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización
del equipo no sea eliminada.
13. Los cables de la fuente de poder deben ser guiados de tal manera que no sean
pisados ni pellizcados por objetos colocados sobre o contra ellos, poniendo
particular atención a los contactos y receptáculos donde salen del aparato.
14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las recomen-
daciones del fabricante.
15. En caso de existir, una antena externa deberá ser localizada lejos de las lineas
de energia.
16. El cable de corriente deberá ser desconectado del cuando el equipo no sea
usado por un largo periodo de tiempo.
17. Cuidado debe ser tomado de tal manera que objectos liquidos no sean derra-
mados sobre la cubierta u orificios de ventilación.
18. Servicio por personal calificado deberá ser provisto cuando:
A. El cable de poder o el contacto ha sido dañado; u
B. Objectos han caído o líquido ha sido derramado dentro del aparato; o
C. El aparato ha sido expuesto a la lluvia; o
D. El aparato parece no operar normalmente o muestra un cambio en su
desempeño; o
E. El aparato ha sido tirado o su cubierta ha sido dañada.

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CONTENTS
CE Notice .................................................................................................... 2
Radio and TV Interference .......................................................................... 2
Trademarks Used In This Manual ............................................................... 3
Normas Oficiales Mexicanas (NOM) Electrical Safety Statement ............. 3
1. General Information ....................................................................................6
1.1 Features ...............................................................................................6
1.2 Description ......................................................................................... 6
2. Installation ................................................................................................... 8
2.1 Connecting the Twisted-Pair Line Interface .......................................9
2.2 Connecting the 10/100Base-T Ethernet Interface ............................ 10
2.3 Connecting Power ............................................................................ 11
3. Configuration............................................................................................. 12
3.1 Configuring DIP Switch S1 ..............................................................14
3.1.1 S1-2: Impulse Noise Protection .............................................14
3.1.2 S1-3: Rate Limit .................................................................... 14
3.1.3 S1-4: General Protection (Signal to Noise Ratio).................. 14
4. Operation ................................................................................................... 15
4.1 Power Up ..........................................................................................15
4.2 Front Panel LED Status Monitors .................................................... 15
A. Specifications ............................................................................................ 16
A.1 LAN Connection ..............................................................................16
A.2 Transmission Line ............................................................................16
A.3 Line Rate and Distance .....................................................................16
A.4 LED Status Indicators .......................................................................16
A.5 Power Supply ....................................................................................16
A.6 Temperature Range ..........................................................................16
A.7 Humidity ...........................................................................................17
A.8 Dimensions .......................................................................................17
B. High Speed Ethernet Extender Interface Pin Assignment......................... 18
B.1 10/100Base-T Interface ....................................................................18
B.2 Line Interface ....................................................................................18

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C. Sample Rates/Distance Chart, Based on 24 AWG (0.5 MM) ................... 19
Notes.......................................................................................................... 20
Notes.......................................................................................................... 21

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1. General Information
Thank you for your purchase of this Black Box product. If any questions arise
during installation or use of the unit, contact Black Box Tech Support at (724)
746-5500.
1.1 Features
• Variable rate ethernet extender - Easy to configure
• Auto-MDIX Ethernet
• Configurable 10/100, Full/Half, and Auto-Negotiating Ethernet
• Extends network connections up to 5,500 ft (1.6 km) over 2-wire 24-AWG
unconditioned lines
• Auto-Rate line rates up to 100 Mbps downstream/70 Mbps upstream
• Symmetric or asymmetric settings via DIP switch
• Transparent operation
• LED indicators for Power, Link, Ethernet Link & Activity, and Remote/Local
1.2 Description
The Black Box LB401A Ethernet Extenders provide high-speed LAN connec-
tions between peered Ethernet LANs, remote PCs, or any other network enabled
10/100Base-T device.
Operating in pairs, one LB401A is configured as the (L) Local unit located at one
end of the LAN extension and the other LB401A is configured as the (R) Remote
unit at the other end. The LB401A is configured as a L or R via the switch on the
bottom of the unit. These units can automatically forward LAN broadcasts, mul-
ticasts, and frames across a 2-wire voice-grade twisted-pair link. The data is
passed transparently (unmodified) through the 2173s. The 2173s automatically
add and delete MAC addresses, only passing packets across the LINE link that
are meant for the remote peered LAN.

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Figure 1. Typical application
The pair of LB401A models work together to create a transparent extension
between two peered Ethernet LANs. Figure 1 shows a typical point-to-point
application.

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2. Installation
To install the LB401A Ethernet Extender, do the following:
1. Connect the line interface between the units (refer to section 2.1, “Connect-
ing the Twisted-Pair Line Interface” on page 11)
Note See Figure 2 for the standalone unit’s rear panel arrangements.
2. Connect the Ethernet interface (refer to section 2.2, “Connecting the
10/100Base-T Ethernet Interface” on page 12).
3. Connect the power plug (refer to section 2.3, “Connecting Power” on
page 13).
Figure 2. High Speed Ethernet Extender rear panel
CAUTION
The Interconnecting cables shall be acceptable for
external use and shall be rated for the proper applica-
tion with respect to voltage, current, anticipated tem-
perature, flammability, and mechanical serviceability.
Line
Power
Made in the USA
Ethernet
LB401A
Power
jack
Dual 10/100
Ethernet ports
CopperLINK
twisted-pair
RJ-45 interface
2 1