Black Box LPB2910A User manual

Installation and Getting Started Guide
Gigabit Managed PoE+ Switches
LPB2910A
LPB2926A
LPB2952A
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 [phone]
www.blackbox.com • [e-mail]
Customer
Support
Information

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Page 2
Trademarks Used in this Manual
We‘re here to help! If you have any questions about your application
or our products, contact Black Box Tech Support at 724-746-5500
or go to blackbox.com and click on “Talk to Black Box.”
You’ll be live with one of our technical experts in less than 60 seconds.
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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FCC and IC RFI 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.
Disclaimer:
Black Box Network Services shall not be liable for damages of any kind, including, but not limited to, punitive, consequential or cost of cover damages, resulting
from any errors in the product information or specifications set forth in this document and Black Box Network Services may revise this document at any time
without notice.

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NOM Statement
Instrucciones de Seguridad
(Normas Oficiales Mexicanas Electrical Safety Statement)
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.
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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NOM Statement
CAUTION:
Circuit devices are sensitive to static electricity, which can damage their delicate electronics. Dry weather conditions or walking
across a carpeted floor may cause you to acquire a static electrical charge.
To protect your device, always:
• Touch the metal chassis of your computer to ground the static electrical charge before you pick up the circuit device.
• Pick up the device by holding it on the left and right edges only.
• If you need to connect an outdoor device to this device with cable, then you must add an arrester on the cable between the
outdoor device and this device.
NOTE: The switch is an indoor device; if it will be used in outdoor environment or connects with some outdoor device, then it
must use a lightning arrester to protect the switch.
WARNING:
• Self-demolition on the switch is strictly prohibited. Damage caused by self-demolition will void the warranty.
• Do not place the switch outdoors or in a sandstorm.
• Before installation, make sure input power supply and product specifications are compatible with each other.
• To reduce the risk of electric shock, disconnect all AC or DC power cords and cables to completely remove power from the unit.
• Before importing/exporting configuration, make sure the firmware version is the same.
• After firmware upgrade, the switch will update the configuration automatically to the most recent firmware version.
Related Publications
For specific information on how to operate and use the management functions of the switch, download the user manual.
The full user manual/installation guide can be downloaded from the Black Box Web site.
To download from the Web site:
1. Go to www.blackbox.com
2. Enter the part number (LPB2910A, LPB2926A, or LPB2952A) in the search box:
3. Click on the “Resources” tab on the product page, and select the document you wish to download.
If you have any trouble accessing the Black Box site to download the manual, you can contact our Technical Support
at 724-746-5500 or [e-mail].

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Table of Contents
Table of Contents
1. Specifications.........................................................................................................................................................................7
2. Overview ...............................................................................................................................................................................9
2.1 Introduction...................................................................................................................................................................9
2.2 Switch Architecture and Network Management Options..............................................................................................9
2.2.1 Switch Architecture...............................................................................................................................................9
2.2.2 Network Management Options ...........................................................................................................................9
2.3 What’s Included ............................................................................................................................................................9
2.4 Hardware Description.................................................................................................................................................. 10
2.4.1 LPB2910A ........................................................................................................................................................... 11
2.4.2 LPB2926A........................................................................................................................................................... 12
2.4.3 LPB2952A........................................................................................................................................................... 13
2.4.4 Supported SFP Transceivers ................................................................................................................................ 14
2.4.5 LED Indicators and their Functions ..................................................................................................................... 15
2.4.6 Power Select ...................................................................................................................................................... 15
2.4.7 Power over Ethernet (PoE).................................................................................................................................. 15
3. Network Planning................................................................................................................................................................ 16
3.1 Introduction to Switching ............................................................................................................................................ 16
3.2 Application Examples .................................................................................................................................................. 16
4. Installing the Switch ............................................................................................................................................................ 17
4.1 Selecting a Site ............................................................................................................................................................ 17
4.2 Ethernet Cabling.......................................................................................................................................................... 17
4.3 Equipment Checklist.................................................................................................................................................... 18
4.4 Mounting .................................................................................................................................................................... 18
4.5 Installing an Optional SFP Transceiver .......................................................................................................................... 19
4.6 Connecting to a Power Source....................................................................................................................................20
4.7 Connecting to the Console Port.................................................................................................................................. 21
4.8 Web-Based Management............................................................................................................................................22
5. Making Network Connections ............................................................................................................................................ 24
5.1 Connecting Network Devices ......................................................................................................................................24
5.2 Twisted-Pair Devices .................................................................................................................................................... 24
5.2.1 Cabling Guidelines.............................................................................................................................................. 24
5.2.2 Connecting to PCs, Servers, Hubs, and Switches ............................................................................................... 24
5.2.3 Network Wiring Connections.............................................................................................................................24
5.3 Fiber Optic SFP Devices................................................................................................................................................25
5.4 Connectivity Rules .......................................................................................................................................................26
5.4.1 1000BASE-T Cable Requirements.......................................................................................................................26
5.4.2 1000 Mbps Gigabit Ethernet Colllsion Domain ..................................................................................................26
6. Cable Labeling and Connection Records.............................................................................................................................28
7. Troubleshooting...................................................................................................................................................................29
8. Power and Cooling Problems ..............................................................................................................................................30
8.1 Installation ...................................................................................................................................................................30
8.2 In-Band Access ............................................................................................................................................................30
9. Cables .............................................................................................................................................................................31
9.1 Twisted-Pair Cable and Pin Assignments .....................................................................................................................31
9.2 10BASE-T/100BASE-TX Pin Assignments...................................................................................................................... 31
9.3 Straight-Through Wiring ..............................................................................................................................................31
9.4 Crossover Wiring .........................................................................................................................................................32
9.5 1000BASE-T Pin Assignments ..................................................................................................................................... 32
9.6 Cable Testing for Existing Category 5 Cable................................................................................................................33
9.7 Adjusting Existing Category 5 Cabling to Run 1000BASE-T ........................................................................................33
9.8 Fiber Standards............................................................................................................................................................33
Appendix. Glossary ...................................................................................................................................................................34

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Chapter 1: Specifications
Physical
Connectors LPB2910A: (8) 10/100/1000 Mbps UTP (PoE+), (2) Gigabit Ethernet combo ports
TP/(100/1000M) SFP;
LPB2926A: (24) 10/100/1000 Mbps UTP (PoE+), (2) Gigabit Ethernet combo ports
TP/(100/1000M) SFP;
LPB2952A: (48) 10/100/1000 Mbps UTP (PoE+), (4) 1G/10 Gbps SFP fiber ports
Network Interface LPB2910A:
Ports 1–8: RJ-45 connector, Auto MDI/X,
10BASE-T: RJ-45 (100-ohm, UTP cable, Category 3 or better),
100BASE-TX: RJ-45 (100-ohm, UTP cable Category 5 or better),
1000BASE-T: RJ-45 (100-ohm, UTP or STP cable, Category 5, 5e, or 6),
Ports 9–10: 100/1000M SFP ports;
Maximum UTP Cable Length: 328 ft (100 m);
LPB2926A:
Ports 1–24: RJ-45 connector, Auto MDI/X,
10BASE-T: RJ-45 (100-ohm, UTP cable, Category 3 or better),
100BASE-TX: RJ-45 (100-ohm, UTP cable Category 5 or better,
1000BASE-T: RJ-45 (100-ohm, UTP or STP cable, Category 5, 5e, or 6,
Ports 25–26: 100/1000M SFP ports;
Maximum UTP Cable Length: 328 ft (100 m),
LPB2952A:
Ports 1–48: RJ-45 connector, auto MDI/X,
10BASE-T: RJ-45 (100-ohm, UTP cable; Category 3 or better),
100BASE-TX: RJ-45 (100-ohm, UTP cable; Category 5 or better),
1000BASE-T: RJ-45 (100-ohm, UTP or STP cable; Category 5, 5e, or 6),
Ports 49–52: 1G/10G SFP ports;
Maximum UTP or STP Cable Length: 328 ft (100 m)
LEDs System: Power;
Twisted-Pair Port: Status LEDs: LINK/ACT, 10/100/1000M;
SFP Port: Status LEDs: LINK/ACT/SPD, 100/1000M
Dimensions LPB2910A: 1.7"H x 8.7"W x 9.4"D (4.4 x 22 x 24 cm);
LPB2926A: 1.7"H x 17.4"W x 8.3"D (4.4 x 44.2 x 21.1 cm);
LPB2952A: 1.7"H x 17.3"W x 15.1"D (4.4 x 44 x 38.5 cm)
Environmental
Temperature Operating: 32 to 122° F (0 to 50° C)
Humidity Operating: 10 to 90%, noncondensing
Power
Power Input 100–240 VAC, 50–60 Hz
Power Supply LPB2910A: 130 W;
LPB2926A: 185 W;
LPB2952A: 370 W
1. Specifications

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Chapter 1: Specifications
Switch Features
Switching Database 8 K MAC addresses entries
Forwarding Mode Store-and-Forward
Throughput LPB2910A: 20 Gbps;
LPB2926A: 52 Gbps;
LPB2952A: 176 Gbps
Flow Control Full duplex: IEEE 802.3x;
Half-duplex: Backpressure
Jumbo Frames 9216 bytes
Management Features
In-Band Management SSH/SSL, Telnet, SNMP, or HTTP
Out-of-Band Management RJ-45 console port
Software Loading HTTP, TFTP in-band, Console out-of-band
Approvals
Standards IEEE 802.3: 10BASE-T Ethernet (Twisted-pair Copper),
IEEE 802.3u: 100BASE-TX Ethernet (Twisted-pair Copper),
IEEE 802.3ab: 1000BASE-TX Ethernet (Twisted-pair Copper),
IEEE 802.3z: 1000BASE-X Ethernet;
IEEE 802.3x: Flow Control Capability;
ANSI/IEEE 802.3: Auto-negotiation,
IEEE 802.1Q: VLAN,
IEEE 802.1p: Class of Service,
IEEE 802.1X: Access Control,
IEEE 802.1D: Spanning Tree,
IEEE 802.1w: Rapid Spanning Tree,
IEEE 802.1s: Multiple Spanning Tree,
IEEE 802.3ad: Link Aggregation Control Protocol (LACP),
IEEE 802.1AB: Link Layer Discovery Protocol (LLDP)
Emissions EN55022 (CISPR 22) Class A EN 61000-3,
FCC Class A,
CE Mark
Immunity EN 61000-4-2/3/4/5/6/8/11,
EN 55024

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Chapter 2: Overview
2. Overview
2.1 Introduction
The Gigabit Managed PoE+ Switches provide a reliable infrastructure for your business network. These switches improve the avail-
ability of your critical business applications, protect your sensitive information, and optimize your network bandwidth to deliver
information and applications more effectively. Easy to set up and use, the switches provide the ideal combination of affordability
and capabilities for entry-level networking. Use them in small business or enterprise applications.
Three models are available:
• LPB2910A
• LPB2926A
• LPB2952A
The switches support advanced security management capabilities and network features, including data, voice, security, and
wireless technologies. The switches are easy to deploy and configure, providing stable and quality network services.
2.2 Switch Architecture and Network Management Options
2.2.1 Switch Architecture
The switch performs wire-speed, non-blocking switching. This allows wire-speed transport of multiple packets at low latency on
all ports simultaneously. The switch also features full-duplex capability on all ports, which effectively doubles the bandwidth of
each connection.
This switch uses store-and-forward technology to ensure maximum data integrity. With this technology, the entire packet must
be received into a buffer and checked for validity before being forwarded. This prevents errors from being propagated throughout
the network.
2.2.2 Network Management Options
You can manage the switch over the network with a Web browser or Telnet application. The switch includes a built-in network
management agent that allows it to be managed in-band using SNMP or RMON (Groups 1, 2, 3, 9) protocols. It also has an RJ-45
console port connector on the front panel for out-of-band management. Connect a PC to this port for configuration and moni-
toring out-of-band via a null-modem serial cable.
NOTE: For a detailed description of the management features, refer to the user’s manual.
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 [e-mail].
• Gigabit Managed PoE+ Switch
• Four adhesive rubber feet
• Mounting Accessory (for 19” rack shelf, optional)
• AC Power Cord
• RJ-45 Console Cable
• This Installation and Getting Started Guide
The full user manual can be downloaded from the Black Box Web site.
To download from the Web site:
1. Go to www.blackbox.com
2. Enter the part number (LPB2910A, LPB2926A, or LPB2952A) in the search box.

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Chapter 2: Overview
3. Click on the “Resources” tab on the product page, and select the document you wish to download.
If you have any trouble accessing the Black Box site to download the manual, you can contact our Technical Support
at 724-746-5500 or [e-mail].
2.4 Hardware Description
1000BASE-T Ports
The switch includes 10, 26, or 48 1000BASE-T RJ-45 ports. All RJ-45 ports support automatic MDI/MDI-X operation, auto-negoti-
ation of speed and flow control, so the switch automatically select the optimum data rate and transmission.
SFP Transceiver Slots
The LPB2910A, LPB2926A, and LPB2952A switches support two or four Small Form Factor Pluggable (SFP) transceiver slots. The
LPB2910A shares two SFP slots with RJ-45 ports 9 and 10. The LPB2926A shares two SFP slots with RJ-45 ports 25 and 26. If an
SFP transceiver (purchased separately) is installed in a slot and has a valid link on the port, the associated RJ-45 port is disabled.
The LPB2952A has four 1G/10G SFP slots on ports 49 through 52.
Supported SFP transceivers are listed in Section 2.4.4.
Port and System Status LEDs
The switch has an LED display panel that indicates system and port status and activity to simplify installation and network
troubleshooting. The LEDs are located on the left side of the front panel and are described in Section 2.4.5.

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Chapter 2: Overview
2.4.1 LPB2910A
1
2
5 4 6
7 8
9
3
Figure 2-1. Front panel of the LPB2910A.
10
Figure 2-2. Back panel of the LPB2910A.
Table 2-1. LPB2910A components.
Number in Figures 2-1 and 2-2 Component in Figures 2-1 and
2-2
Description
1(1) System LED Lights when system is active
2(1) Mode/Reset button Press to select Mode or Reset
3(1) PoE LED Lights when system is in PoE mode
4(1) RJ-45 port Console port
5(1) Link/Act/Speed LED Lights when switch is in Link/Act/Speed mode
6(8) RJ-45 ports 10/100/1000BASE-T ports
7(8) Speed LEDs 10/100/1000 Mbps
8(8) LINK/ACT LEDs Link/Activity LED: Blinking: activity on port;
Off: No link is established
9(2) RJ-45/SFP combo ports 10/100/1000 RJ-45/100/1000 SFP combo ports
10 (1) 3-prong AC power socket Links to AC power cord

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Chapter 2: Overview
2.4.2 LPB2926A
1
2
5
4
6
7 8
9
3
Figure 2-3. Front panel of the LPB2926A.
10
Figure 2-4. Back panel of the LPB2926A.
Table 2-2. LPB2926A components.
Number in Figures 2-3 and 2-4 Component in Figures 2-3 and 2-4 Description
1(1) System LED Lights when system is active
2(1) Mode/Reset button Press to select Mode or Reset
3(1) PoE LED Lights when switch is in PoE mode
4(1) RJ-45 port Console port
5(1) Link/Act/Speed LED Switch is in Link/Act/Speed Mode
6(24) RJ-45 ports 10/100/1000BASE-T ports
7(24) Speed LEDs 10/100/1000 Mbps
8(24) LINK/ACT LEDs Link/Activity LED: Blinking: activity on port;
Off: No link is established
9(2) RJ-45/SFP combo ports 10/100/1000 RJ-45/100/1000 SFP combo ports
10 (1) 3-prong AC power socket Links to AC power cord

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Chapter 2: Overview
2.4.3 LPB2952A
1
46
7, 8
9
5
3
2
Figure 2-5. Front panel of the LPB2952A.
10
11
12
Figure 2-6. Back panel of the LPB2952A.
Table 2-3. LPB2952A components.
Number in Figures 2-5 and 2-6 Component in Figures 2-5 and 2-6 Description
1(1) System LED Lights when system is active
2(1) Mode/Reset button Press to select Mode or Reset
3(1) PoE LED Lights when switch is in PoE mode
4(1) Link/Act LED Lights when switch is in Link/Act mode
5(1) Speed LED Lights when switch is in Speed mode
6(48) RJ-45 ports 10 /100 /1000BASE-T ports
7(48) Speed LEDs 10 /100 /1000 Mbps
8(48) LINK/ACT LEDs Link/Activity LED: Blinking: activity on port;
Off: No link is established
9(4) SFP ports 100/1000 SFP ports
10 (1) 3-prong AC power socket Links to AC power cord
11 (1) RPS connector Not used
12 (1) DB9 male Console port

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Chapter 2: Overview
2.4.4 Supported SFP Transceivers
The following table shows a list of transceiver types that we have tested with the switch.
Table 2-4. Supported SFP Transceivers.
Ordering Information: SFP Modules Compatible Switches
LFP401 SFP, 155-Mbps Fiber with Extended Diagnostics, 850-nm
Multimode, LC, 2 km
LPB2910A, LPB2926A
LFP402 SFP, 155-Mbps Fiber with Extended Diagnostics, 1310-nm
Multimode, LC, 2 km
LPB2910A, LPB2926A
LFP403 SFP, 155-Mbps Fiber with Extended Diagnostics, 1310-nm,
Single-Mode, LC, 30 km
LPB2910A, LPB2926A
LFP404 SFP, 155-Mbps Fiber with Extended Diagnostics, 1310-nm
Single-Mode, Plus, LC, 60 km
LPB2910A, LPB2926A
LFP411 SFP, 1.25-Gbps Fiber with Extended Diagnostics, 850-nm
Multimode, LC, 300 m
LPB2910A, LPB2926A, LPB2952A
LFP412 SFP, 1.25-Gbps Fiber with Extended Diagnostics, 1310-nm
Multimode, LC, 2 km
LPB2910A, LPB2926A, LPB2952A
LFP413 SFP, 1.25-Gbps Fiber with Extended Diagnostics, 1310-nm
Single-Mode, LC, 10 km
LPB2910A, LPB2926A, LPB2952A
LFP414 SFP, 1.25-Gbps Fiber with Extended Diagnostics, 1310-nm
Single-Mode, LC, 30 km
LPB2910A, LPB2926A, LPB2952A
LFP416 SFP with SGMII Interface, 1.25 Gbps, Copper,
10/100/1000BASE-T, Extended Diagnostics
LPB2910A, LPB2926A, LPB2952A
LSP421 10GBASE-SR SFP+, 850-nm Multimode, 300 m, LC LPB2952A
LSP422 10GBASE-SR SFP+, 1310-nm Single-Mode, 10 km, LC LPB2952A

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Chapter 3: Network Planning
2.4.5 LED Indicators and their Functions
The table below describes the switch’s LED indicators and their functions.
Table 2-5. Port Status LEDs.
LED Indicator Condition Status
TP SPEED Green/Yellow Lit Green when TP link on 1000 Mbps,
Yellow when TP link on 10/100 Mbps
PoE (Link/ACT) Green Lit Green when PoE link with PD and supply power to PD
SFP SPEED Green/Yellow Lit Green when SFP link on 1000 Mbps,
Yellow when SFP link on 100 Mbps
Table 2-6. Mode Status LEDs.
LED Indicator Condition Status
Link/ACT/Speed Green Lit Green indicates all LED of each port are in Link/ACT/Speed mode.
PoE Green Lit Green when PoE link with PD and supply power to PD.
Table 2-7. System Status LED.
LED Indicator Condition Status
Power Green
OFF
Lit green when power is on,
Off when power is off.
2.4.6 Power Socket
An AC power socket is on the rear panel of the switch. Use an AC power cord (included) to power the switch.
2.4.7 Power over Ethernet (PoE)
Devices connected to the switch can be powered over the twisted-pair cable that links the devices to the switch. A powered
device (PD) provides power over the extra wires on the RJ-45 connector and cables.
The LPB2910A, LPB2926A, and LPB2952A support PoE (802.3af) and PoE+ (802.3at) up to 30 W per port.

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Chapter 3: Network Planning
3. Network Planning
3.1 Introduction to Switching
A network switch allows simultaneous transmission of multiple packets; it can partition a network more efficiently than bridges
or routers. The switch is one of the most important devices for today’s networking technology.
When performance bottlenecks are caused by congestion at the network access point such as file server, the device can be
connected directly to a switched port. Using full-duplex mode doubles the bandwidth of the dedicated segment to maximize
throughput.
When networks are based on repeater (hub) technology, the distance between end stations is limited by a maximum hop count.
A switch subdivides the network into smaller and more manageable segments, and links them to the larger network. Then, it
turns the hop count back to zero and removes the limitation.
You can easily configure a switch in any Ethernet, Fast Ethernet, or Gigabit Ethernet network to significantly increase bandwidth
while using conventional cabling and network cards.
3.2 Application Examples
The Gigabit Managed PoE+ Switch has 10, 24, or 48 Gigabit Ethernet TP ports with auto MDI-X and two combo RJ-45/SFP ports
or four 1G/10G SFP slots for a removable SFP module.
The SFP module (ordered separately) connects many different types of fiber modules, such as LC and BiDi-LC modules.
The SFP module segments your network, and also provides a wide range of options in setting up network connections. Typical
applications are described below.
The switch is suitable for the following applications.
• Remote site application for Enterprise or SMB.
• Peer-to-peer application for two remote offices.
• Office network.
• High-performance requirements environment.
• Advanced security for network safety applications.
• Data/ voice and video conference applications.

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Chapter 4: Installing the Switch
4. Installing the Switch
4.1 Selecting a Site
Mount the switch in a standard 19-inch equipment rack (via an optional rackmount kit) or on a flat surface. Follow the guidelines
below when choosing a location.
The site should:
• Be at the center of all the devices you want to link and near a power outlet.
• Be able to maintain its temperature within 32 to 122° F (0 to 50° C) and its humidity within 10% to 90%, non-condensing.
• Be accessible for installing, cabling and maintaining the devices.
• Allow the status LEDs to be clearly visible.
• Make sure the twisted-pair Ethernet cable is always routed away from power lines, radios, transmitters or any other electrical
interference.
• Make sure that Gigabit Managed PoE+ Switch is connected to a separate grounded power outlet that provides 100 to 240 VAC,
50 to 60 Hz.
4.2 Ethernet Cabling
For proper operation when installing the switch into a network, make sure that the current cables are suitable for 100BASE-TX or
1000BASE-T operation. Check the following criteria against the current installation of your network:
• Cable type: Unshielded twisted pair (UTP) or shielded twisted pair (STP) cable with RJ-45 connectors; Category 5 or Category
5e with maximum length of 328 feet (100 meters) is recommended for 100BASE-TX, and Category 5e or 6 with maximum
length of 28 feet (100 meters) is recommended for 1000BASE-T.
• Protection from radio frequency interference emissions.
• Electrical surge suppression.
• Separation of electrical wires and data based network wiring.
• Safe connections with no damaged cables, connectors, or shields.
Figure 4-1. RJ-45 connection.
Figure 4-2. SFP transceiver.

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4.3 Equipment Checklist
Before unpacking this switch, check the contents to be sure you have received all the components (see Section 2.3). Then, before
beginning the installation, be sure you have all other necessary installation equipment.
WARNING: The SFP transceivers are Class 1 laser devices. Avoid direct eye exposure to the beam coming from the transmit port.
4.4 Mounting
The switch can be mounted in a standard 19-inch equipment rack or on a desktop or shelf. Mounting instructions for each type
of site follow.
Rackmounting
Before rackmounting the switch, consider the following factors:
• Temperature: Since the temperature within a rack assembly may be higher than the ambient room temperature, check that the
rack environment temperature is within the specified operating temperature range 32 to 122° F (0 to 50° C).
• Mechanical Loading: Do not place any equipment on top of a rackmounted unit.
• Circuit Overloading: Be sure that the supply circuit to the rack assembly is not overloaded.
• Grounding: Rackmounted equipment should be properly grounded.
To rackmount devices:
Step 1: Attach the brackets to the device using the screws provided in the mounting kit (INCLUDED OR NOT???).
Attaching the brackets
Figure 4-3. Attaching the brackets.
Step 2: Mount the device in the rack (using the rackmount brackets and four rackmounting screws). Be sure to secure the lower
rack-mounting screws first to prevent the brackets being bent by the weight of the switch.
Installing the switch in a rack
Figure 4-4. Attaching the switch to the rack with screws (not included).

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Step 3: If installing a single switch only, turn to “Connection to a Power Source” at the end of this chapter.
Step 4: If installing multiple switches, mount them in the rack, one below the other, in any order.
Desktop or Shelf Mounting
Step 1:Attach the four adhesive rubber feet to the bottom of the first switch.
Figure 4-5. Attaching the adhesive rubber feet.
Step 2: Set the device on a flat surface near an AC power source, making sure there are at least two inches of space on all sides
for proper air flow.
Step 3: If installing a single switch only, go to “Connecting to a Power Source” at the end of this Chapter.
Step 4: If installing multiple switches, attach four adhesive feet to each one. Place each device squarely on top of the one below,
in any order.
4.5 Installing an Optional SFP Transceiver
You can install or remove an SFP from an SFP slot without powering off the switch. Use only compatible SFPs.
NOTE: On the LPB2910A and LPB2926A, the SFP slots are shared with the two 10/100/1000BASE-T RJ-45 ports. If an SFP is
installed in a slot, the associated RJ-45 port is disabled and cannot be used.
The SFPs operate only at full duplex. Half-duplex operation is not supported.
Make sure the network cable is NOT connected when you install or remove an SFP module.

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Inserting an SFP Transceiver into a Slot
Figure 4-6. Inserting an SFP transceiver into a slot.
To install an SFP transceiver, do the following:
Step 1: Consider network and cabling requirements to select an appropriate SFP transceiver type.
Step 2: Insert the transceiver with the optical connector facing outward and the slot connector facing down. Note that SFP
transceivers are keyed so they can only be installed in one orientation.
Step 3: Slide the SFP transceiver into the slot until it clicks into place.
NOTE: SFP transceivers are ordered separately.
4.6 Connecting to a Power Source
You can plug or remove the power cord from an AC power socket to switch the power on and off.
FIgure 4-7. Inserting the power cord into an AC power socket.
Step 1: Insert the power cable plug directly into the AC Socket located at the back of the switch.
Step 2: Plug the other end of the cable into a grounded, 3-pin, AC power source.
Step 3: Check the front-panel LEDs as the device is powered on to be sure the POWER LED is lit. If not, check that the power
cable is correctly plugged in.
WARNING: For International use, you may need to change the AC line cord. You must use a line cord set that has been approved
for the socket type in your country.