Black Box LGB416A User manual

BL A C K B O X®
Connect up to 16 or 24 Gigabit Ethernet, Fast
Ethernet, or Ethernet devices to your network.
Auto-negotiation means every port can automatically sense the mode
and speed of connected network devices.
16-/24-Port 10/100/1000 RJ-45 Unmanaged Gigabit Switches
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: [e-mail]
Customer
Support
Information
LGB416A
LGB424A

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FCC, IC, and CE Statements
FEDERAL COMMUNICATIONS COMMISSION AND
INDUSTRY CANADA RADIO FREQUENCY INTERFERENCE STATEMENTS
This equipment generates, uses, and can radiate 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 communication.
It has been tested and found to comply with the limits for a Class A computing
device in accordance with the specifications in Subpart B of Part 15 of FCC rules,
which are designed to provide reasonable protection against such interference
when the equipment is operated in a commercial environment. Operation of
this equipment in a residential area is likely to cause interference, in which case
the user at his own expense will be required to take whatever measures may be
necessary to correct the interference.
Changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.
This digital apparatus does not exceed the Class A 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 la classe A prescrites dans le
Règlement sur le brouillage radioélectrique publié par Industrie Canada.

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NOM Statement
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
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.

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NOM Statement
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
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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Trademarks Used in this Manual
Trademarks Used in this Manual
Black Box and the Double Diamond logo are registered trademarks of
BB Technologies, Inc.
Any other trademarks mentioned in this manual are acknowledged to be
the property of the trademark owners.

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Table of Contents
Chapter Page
1. Specifications ..........................................................................................7
2. Overview ..........................................................................................8
2.1 Introduction ....................................................................................8
2.2 Features ..........................................................................................8
2.3 What’s Included ..............................................................................8
2.4 Hardware Description .....................................................................9
2.4.1 LGB416A............................................................................9
2.4.2 LGB424A..........................................................................10
3. Installation ........................................................................................11
3.1 Connecting a Switch/Hub to the 16-/24-Port Gigabit Ethernet
Switch ........................................................................................ 11
3.2 Connecting a PC/Other Device(s) to the 16-/24-Port Gigabit
Ethernet Switch.............................................................................11

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Chapter 1: Specifications
1. Specifications
Buffer Memory — LGB416A: 340 KB;
LGB424A: 500 KB
Filtering/Forwarding Rates — 1000 Mbps port: 1,488,000 pps;
100 Mbps port: 148,000 pps;
10 Mbps port: 14,880 pps
Jumbo Frames — 9.6 KB
MAC Addresses— 8 K
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-TX: CAT5e UTP/STP
Transmission Method — Store-and-Forward
Connectors — LGB416A: (16) RJ-45;
LGB424A: (24) RJ-45
Indicators — LGB416A: (16) Link/Act LEDs, (16) 1000M LEDs;
LGB424A: (24) Link/Act LEDs, (24) 1000M LEDs
Temperature Tolerance — Operating: 32 to 131° F (0 to 55° C);
Storage: -4 to +194° F (-20 to +90° C)
Power — 90–260 VAC, 50–60 Hz;
Consumption: 20 Watts maximum
Size — 1.7"H x 17.3"W x 8.7"D (4.4 x 44 x 22 cm)
Weight — LGB416A: 6.4 lb. (2.9 kg);
LGB424A: 6.6 lb. (3 kg)

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Chapter 2: Overview
2. Overview
2.1 Introduction
The 10/100/1000 RJ-45 Unmanaged Switches provide 16 or 24 10/100/1000
Mbps ports. They’re easy to install and provide high performance in an
environment where trafffic on the network and the number of users increases
continuously. The switches support the highest speed even when operating in
full-duplex mode.
The switches also provide automatic crossover detection on each port. It’s simple
and friendly to uplink to another switch without a crossover cable.
Use the switches for medium to large workgroups. It’s easy to upgrade network
capacity, and you can mount the switches in a 19" rack or cabinet.
2.2 Features
• Complies with IEEE 802.3 Ethernet, IEEE 802.3u Fast Ethernet, and IEEE 802.3ab
Gigabit Ethernet standards.
• Has 16 or 24 autonegotiating 10/100/1000 ports.
• Fits in a 19" rack or cabinet.
• Enables non-blocking and non-head-of-line blocking full wire-speed forwarding.
• Supports store-and-forward operation.
• Provides 8K MAC address entry.
• Supports broadcast storm filtering.
• All ports provide Auto-MDI/MDI-X crossover.
• Uses backpressure flow control for half-duplex operation, and IEEE 802.3x for
full-duplex mode.
• Smart plug-and-play.
2.3 What’s Included
Your package should contain the following items. If anything is missing
or damaged, contact Black Box Technical Support at 724-746-5500
or [e-mail].
• (1) 16- or 24-Port 10/100/1000 RJ-45 Unmanaged Gigabit Switch
• (1) rackmount kit (includes [2] brackets, [8] screws)
• (1) AC power cord

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Chapter 2: Overview
• This user‘s manual
2.4 Hardware Description
2.4.1 LGB416A
Figures 2-1 and 2-2 show the front and back panel of the 16-port switch. Table
2-1 describes its components.
1 2, 3 4
4
Figure 2-1. LGB416A front panel.
5 6
Figure 2-2. LGB416A back panel.
Table 2-1. 16-port switch components.
Number Component Description
1Power LED Lights when power to the unit is on
2(16) Link/Act LEDs
On: Link is on
Flashing: Data present
3(8) 1000M LEDs
On: Link running at 1000 Mbps
Off: Link running at 10/100 Mbps
4(16) RJ-45 connectors Link to switches/hubs, PCs, servers, or other network devices.
5On/Off switch Press to power on/off the unit.
63-prong connector Attaches to a 90–260 VAC, 50–60 Hz power cord (included).

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Chapter 2: Overview
2.4.2 LGB424A
Figures 2-3 and 2-4 show the front and back panel of the 24-port switch. Table
2-2 describes its components.
1 2, 3 4
4
Figure 2-3. LGB424A front panel.
5 6
Figure 2-4. LGB424A back panel.
Table 2-2. 24-port switch components.
Number Component Description
1Power LED Lights when power to the unit is on
2(24) Link/Act LEDs
On: Link is on
Flashing: Data present
3(24) 1000M LEDs
On: Link running at 1000 Mbps
Off: Link running at 10/100 Mbps
4(24) RJ-45 connectors Link to switches/hubs, PCs, servers, or other network devices.
5On/Off switch Press to power on/off the unit.
63-prong connector Attaches to a 90–260 VAC, 50–60 Hz power cord (included).

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Chapter 3: Installation
3. Installation
3.1 Connecting a Switch/Hub to the 16-/24-Port Gigabit Ethernet Switch
This switch provides automatic crossover detection for any port, which enables
you to uplink another switch without using crossover cable.
Figure 3-1. Switch/hub connection.
3.2 Connecting a PC/Other Device(s) to the 16-/24-Port Gigabit Ethernet
Switch
This switch provides automatic crossover detection for any port, so you can
connect this switch to PCs, servers, and other network devices without worrying
whether your cable is a straight-through or crossover cable. The switch will work
with either cable.
Figure 3-2. PC/other device(s) connection.

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LGB416A, version 1
About Black Box
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© Copyright 2011. 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.