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BL A C K B O X
®
Powered through your PC’s USB port so there’s
no need to find a spare outlet.
Bring Gigabit speeds to your small network.
USB-Powered Gigabit 4-Port Switch
LGB304A
LGB304AE
Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S.
call 724-746-5500) FREE technical support 24 hours a day, 7 days a
week: Call 724-746-5500 or fax 724-746-0746 Mailing address:
Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: info@blackbox.com
Customer
Support
Information
NOM Statement
724-746-5500 | blackbox.com
LGB304A, rev. 1
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 referencia 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.
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 interfiera su uso. La
colocación del aparato eléctrico sobre una cama, sofá, alfombra o superficie similar puede
bloquea la ventilación, no se debe colocar en libreros 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.
FCC and IC RFI Statements; CE Notice
724-746-5500 | blackbox.com
LGB304A, rev. 1
FEDERAL COMMUNICATIONS COMMISSION
and INDUSTRY CANADA
RADIO FREQUENCY INTERFERENCE STATEMENTS
Class B Digital Device. This equipment has been tested and found to comply with the limits for a
Class B computing device pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential installation. However,
there is no guarantee that interference will not occur in a particular installation. This equipment
generates, uses, and can radiate radio frequency energy, and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications. If this
equipment does cause harmful interference to radio or telephone reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
• Consult an experienced radio/TV technician for help.
Caution:
Changes or modifications not expressly approved by the party responsible for compliance
could void the user’s authority to operate the equipment.
To meet FCC requirements, shielded cables and power cords are required to connect this
device to a personal computer or other
Class B certified device. This digital apparatus does not exceed the Class B limits for radio
noise emission from digital apparatus set out in the Radio Interference Regulation of Industry
Canada.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques de classe B prescrites dans le Règlement sur le brouillage
radioélectrique publié par Industrie Canada.
CE WARNING:
This is a Class B product. In a domestic environment, this product may cause radio interference
in which case the user may be required to take adequate measures.
© Copyright 2013. Black Box Corporation. All rights reserved. Black Box
®
and the Double Diamond
logo are registered trademarks of BB Technologies, Inc. Any third-party trademarks appearing in
this manual are acknowledged to be the property of their respective owners.
BL A C K B O X
®
FREE! Live, 24/7 Tech Support is just 30 seconds away.
724-746-5500 | blackbox.com
LGB304A, rev. 1
NOM Statement
Rotate enire bottm section of pages before sending to the printer. See example at right for placement. Questions see shari.
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 recomendaciones 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 derramados 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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2
Chapter 2: Overview
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LGB304A, rev. 1
2.2 Features
• Autonegotiates 10-/100-/1000-Mbps speeds.
• Pocket-sized, with metal case.
• Auto-detects full-/half-duplex modes for any port.
• Dedicated full-duplex 2000-Mbps bandwidth.
• Uses store-and-forward switching methods.
• Supports IEEE 802.3x flow control for full-duplex and backpressure flow control for half-duplex.
• Supports non-blocking and non-head-of-line blocking full wire speed forwarding.
• All ports have Auto-MDI/MDI-X.
• Smart plug-and-play.
2.3 What’s Included
Your package should include the following items. If anything is missing or damaged, contact
Black Box Technical Support at 724-746-5500 or info@blackbox.com.
• USB-Powered Gigabit 4-Port Switch
• Power adapter
• USB cable
• (2) magnets
• (4) rubber feet
• This user’s manual
2.4 Hardware Description
Figures 2-1 and 2-2 show the top, front, and side panels of the switch. Table 2-1 describes the
components.
Figure 2-1. LGB304A/LGB304AE top and front panels.
Figure 2-2. LGB304A/LGB304AE side panel.
Table 2-1. LGB304A/LGB304AE switch components.
Number in
Figures 2-1
and 2-2 Component Description
1 (1) Power LED
On when power to the switch is on.
Off when power to the switch is off.
2 (4) RJ-45 ports Connect RJ-45 peripherals to switch Ports 1–4.
3 (4) Link/Act LEDs
On when port is connected.
Off when there is no connection.
Flashing when data is transmitted or received.
4 Power connector Links to USB power source.
5 Vents Used for airflow.
3. Installation
To install the switch:
1. Connect your network devices to the unit‘s RJ-45 ports.
2. Connect the included USB cable from your laptop or computer to power the switch, or
connect the power supply to the switch.
Figure 3-1 shows a typical installation.
Figure 3-1. Typical installation.
Chapter 2: Overview
724-746-5500 | blackbox.com
Page 3
LGB304A, rev. 1
Chapter 3: Installation
724-746-5500 | blackbox.com
Page 4
LGB304A, rev. 1
Chapter 1: Specifications; Chapter 2: Overview
724-746-5500 | blackbox.com
Page 1
LGB304A, rev. 1
1. Specifications
Buffer Memory — 1 MB
Certifications — FCC Class B, CE
Filtering/Forwarding Rates — 1000-Mbps port: 1,488,000 pps;
100-Mbps port: 148,800 pps;
10-Mbps port: 14,880 pps
MAC Addresses — 2K
Standards — IEEE 802.3 10BASE-T, IEEE 802.3u 100BASE-TX, IEEE 802.3ab
1000BASE-T, IEEE 802.3x flow control
Transmission Media — 10BASE-T CAT3, 4, 5 UTP/STP;
100BASE-TX CAT5 UTP/STP;
1000BASE-T CAT5e UTP/STP
Transmission Method — Store-and-forward
Connectors — On unit: (4) RJ-45 ports;
On cable: (1) USB Type A, (1) barrel connector for power
Indicators — (1) Power LED, (4) Link/Act LEDs (one per port)
Temperature Tolerance — Operating: 32 to 104° F (0 to 40° C);
Storage: -4 to 194° F (-20 to +90° C)
Relative Humidity — 10 to 90%, noncondensing
Power — Type of power plug: LGB304A: U.S.;
LGB304AE: EU;
Input from USB port or supplied power adapter: 100/240 VAC,
50/60 Hz, 0.2 A;
Output: 5 VDC, 1.2 A, 6 W;
Consumption: 2.25 watts max.
Size — 0.8"H x 2.4"W x 3.1"D (2 x 6.2 x 7.9 cm)
Weight — 0.4 lb. (0.2 kg)
2. Overview
2.1 Introduction
The USB-Powered Gigabit 4-Port Switch provides (4) 10-/100-/1000-Mbps ports. This portable
switch is great for setting up impromptu networks or expanding the number of available ports.
The switch can be powered by USB, so it’s ideal for situations where the number of power outlets
is limited.
Laptop
USB cable
Ethernet cable
Ethernet cable
Network devices
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