Black Box LGB1108A User manual

LGB1108A Quick Start Guide
Quick Start Guide
An affordable managed switch with
the power to be a key component of
your network infrastructure.
10-, 26-, or 48-Port Gigabit Managed Switch
LGB1108A
LGB1126A
LGB1148A
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 LGB1108A Quick Start Guide
Trademarks
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.
Intel is a registered trademark of Intel Corporation
Xerox is a registered trademark of Xerox Corporation.
Any other trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.

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LGB1108A Quick Start Guide
FCC Statement
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
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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LGB1108A Quick Start Guide
Table of Contents
Table of Contents
1. Specifications.........................................................................................................................................................................6
1.1 Physical Characteristics ..................................................................................................................................................6
1.2 Switch Features .............................................................................................................................................................6
1.3 Management Features...................................................................................................................................................7
1.4 Standards ......................................................................................................................................................................7
1.5 Compliances ..................................................................................................................................................................7
2. Overview ...............................................................................................................................................................................8
2.1 Introduction...................................................................................................................................................................8
2.2 Features.........................................................................................................................................................................9
2.3 Description of Hardware.............................................................................................................................................. 10
3. Network Planning................................................................................................................................................................ 12
3.1 Introduction to Switching ............................................................................................................................................ 12
3.2 Application Examples .................................................................................................................................................. 12
4. Installation ........................................................................................................................................................................... 14
4.1 Selecting a Site ............................................................................................................................................................ 14
4.2 Ethernet Cabling.......................................................................................................................................................... 14
4.3 Equipment Checklist .................................................................................................................................................... 14
4.4 What’s Included .......................................................................................................................................................... 15
4.5 Mounting Instructions ................................................................................................................................................. 15
5. Network Connections .........................................................................................................................................................22
5.1 Connecting Network Devices ......................................................................................................................................22
5.2 Twisted-Pair Devices ....................................................................................................................................................22
6. Labeling Connections ..........................................................................................................................................................26
7. Troubleshooting................................................................................................................................................................... 27
8. Power and Cooling Problems ..............................................................................................................................................29
8.1 When You Turn the Unit On .......................................................................................................................................29
8.2 In-band Access ............................................................................................................................................................29
9. Cabling .............................................................................................................................................................................30
10. Glossary .............................................................................................................................................................................34

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Chapter 1: Specifications
1. Specifications
1.1 Physical Characteristics
Aggregate Bandwidth — 20 Gbps
Buffer Architecture — 1392 KB on-chip frame buffer
Network Interface — LGB1108A: Ports 1-8: RJ-45 connector, Auto MDI-X; Ports 9-10: RJ-45 connector/(100/1000M) SFP;
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);
LGB1126A: Ports 1–20: RJ-45 connector, Auto MDI-X; Ports 21–24: RJ-45 connector/(100/1000M) SFP, Ports 25–26: 100/1000M SFP,
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);
LGB1148A: Ports 1–44: RJ-45 connector, Auto MDI-X; Ports 45–48: RJ-45 connector/(100/1000M) SFP,
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 — LGB1108A: (8) 10/100/1000 Mbps TP; (2) 100/1000 Mbps SFP Fiber/(10/100/1000 Mbps) TP dual-media ports, (1) RJ-45 console
port;
LGB1126A: (20) 10/100/1000 Mbps TP, (4) 100/1000 Mbps SFP Fiber/(10/100/1000 Mbps) TP dual-media ports, (2) 10/1000M SFP ports,
(1) RJ-45 console port;
LGB1148A: (44) 10/100/1000 Mbps TP, (4) 100/1000 Mbps SFP Fiber/(10/100/1000 Mbps) TP dual media ports, (1) DB9 console port
Switching Database — 8K MAC address entries
User Controls — LGB1108A, LGB1126A: (1) Reset button;
LGB1148A: (1) Mode button
Indicators — LEDs: System: Power; TP Port: status (LINK/ACT), 10/100/1000M;
SFP Port: status (LINK/ACT/SPD), 100/1000M
Temperature Tolerance — Operating: 32 to 104° F (0 to 40° C)
Humidity Tolerance — Operating: 5% to 90% (non-condensing)
Power — Input: 100–240 VAC, 50–60 Hz internal power supply, autosensing;
Consumption: 20 Watts maximum
Dimensions — LGB1108A: 1.7" H x 11" W x 6.5" D (4.4 x 28 x 16.6 cm);
LGB1126A: 1.75" (1U) H x 17.4"W x 8.3"D (4.4 x 44.2 x 21.1 cm);
LGB1148A: 1.75" (1U) H x 17.4"W x 11.8"D (4.4 x 44.2 x 30 cm)
Weight — LGB1108A: 2.97 lb. (1.35 kg);
LGB1126A: 5.3 lb. (2.4 kg);
LGB1148A: 9 lb. (4.1 kg)
1.2 Switch Features
Flow Control — Full-duplex: IEEE 802.3x
Half-duplex: Backpressure
Forwarding Mode — Store-and-forward
Throughput — 35.71 Mbps

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Chapter 1: Specifications
1.3 Management Features
In-Band Management — SSH/SSL, Telnet, SNMP, or HTTP
Out-of-Band Management — RS-232 (RJ-45 console port)
Software loading — HTP, TFTP in-band, Console out-of-band
1.4 Standards
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: autonegotiation,
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)
1.5 Compliances
Compliance — EN55022 (CISPR 22) Class A EN 61003
FCC Class A
CE Mark
Immunity — EN61000-4-2/3/4/5/6/8/11, EN 55024

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Chapter 2: Overview
2 Overview
2.1 Introduction
The 10-, 26-, or 48-Port Gigabit Managed Switch is an affordable managed switch that is a key part of a reliable infrastructure for your
business network. This switch delivers the kind of intelligent features you need:
• to improve the availability of your critical business applications;
• to protect your sensitive information; and
• to optimize your network bandwidth.
Easy to set up and use, the Gigabit Managed Switch provides stable and quality performance to support all types of data, voice, security, and
wireless technologies. It provides the ideal combination of affordability and capabilities for entry-level networking for small businesses or home
office applications and helps create a more efficient, better-connected workforce.
Power
LED
RJ-45
console
port
10/100/1000BASE-T RJ-45 ports TP and 100/1G SFP ports
Switch TP LEDs
Reset/
Default
Figure 2-1. Front panel of the 10-Port Gigabit Managed Switch (LGB1108A).
Power
LED
RJ-45
console
port
10/100/1000BASE-T RJ-45 ports TP and 100/1G SFP ports
Switch TP LEDs
Reset/
Default
Figure 2-2. Front panel of the 26-Port Gigabit Managed Switch (LGB1126A).

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LGB1108A Quick Start Guide
Chapter 2: Overview
10/100/1000BASE-T RJ-45 ports
TP and 100/1G SFP ports
Switch TP LEDs
Speed LED
Link/Act LED
System LED
Mode
button
Figure 2-3. Front panel of the 48-Port Gigabit Managed Switch (LGB1148A).
NOTE: The 26-Port Gigabit Managed Switch’s front panel is similar to the 10-Port Switch. Both switches have the same Power LED and Reset/
Default button. The LGB1108A has (8) 10/100/1000BASE-T RJ-45 ports, (2) TP and 100/1G SFP ports, (16) switch TP LEDs, and (1) RJ-45
console port. The LGB1126A has (20) 10/100/1000BASE-T RJ-45 ports, (4) dual-media UTP/SFP ports, (2) SFP ports, (40) switch TP LEDs,
and (1) RJ-45 console port. The LGB1148A has (44) 10/100/1000BASE-T RJ-45 ports, (4) dual-media UTP/SFP ports, (88) switch TP LEDs,
(1) DB9 console port, and (1) Mode button.
2.2. Features
• Switch Architecture: This switch performs a wire-speed, non-blocking switching fabric, which enables 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. It 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 through-
out the network.
• Network Management Options: The switch can also be managed 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. A PC may be connected to this port for
configuration and monitoring out-of-band via a null-modem serial cable. (For more information on cabling, see Chapter 9: Cables.)
NOTE: For a detailed description of the management features, refer to the User’s Manual.

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Chapter 2: Overview
2.3 Description of Hardware
• 1000BASE-T Ports: The switch contains (8), (20), or (44) 1000BASE-T RJ-45 ports. All RJ-45 ports support automatic MDI/
MDI-X operation, autonegotiation, and IEEE 802.3x autonegotiation of flow control, so the optimum data rate and transmission
can be selected automatically.
• SFP Transceiver Slots: The LBG1108A 10-Port Gigabit Managed Switch supports the small form-factor pluggable (SFP) transceiver slots,
which are shared with RJ-45 port 9 and 10. In the default configuration, 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 LGB1126A 26-Port Gigabit Managed Switch also supports the small
form-factor pluggable (SFP) transceiver slots, which are shared with RJ-45 ports 21–24, and (2) additional SFP ports. The LGB1148A 48-Port
Gigabit Managed Switch has (4) dual-media UTP/SFP ports (Ports 45–48).
The following table shows a list of transceiver types that have been tested with the switch. For an updated list of vendors supplying these
transceivers, contact your local dealer. For information on the recommended standards for fiber optic cabling, see “1000-Mbps Gigabit
Ethernet Collision Domain” in Section 5.2, Tables 5-1 through 5-4, or contact Tech Support at 724-746-5500.
Table 2-1: Supported SFP Transceivers
Media Standard Filter Diameter (Microns) Wavelenth (nm) Maximum Distance*
1000BASE-SX
50 /125
850 550 m (1804.5 ft.)
62.5/125
850 275 m (902.2 ft.)
1000BASE-LX/LHX/ XD/ZX
9/125
1310 10 km (6.2 mi.)
9/125
1550 30.5 km (19.0 mi.)
9/125
1300 10 km (6.2 mi.)
1000BASE-LX Single-Strand
n/a
TX-1310/ RX-1550 20 km (12.4 mi.)
n/a
TX-1550/ RX-1310 20 km (12.4 mi.)
1000BASE-T
n/a
n/a 100 m (328.1 ft.)
100BASE-FX
50 /125
850 2 km (1.2 mi.)
62.5/125
1550 15 km (9.3 mi.)
* NOTE: Maximum distance may vary for different SFP vendors.
Reset/Default or Mode button
The LGB1108A and LGB1126A each have a Reset/Default button. The LGB1148A has a Mode button. The Reset/Default and
Mode buttons function in the same way:
The Mode or Reset button is used to change port mode display (link/speed), warm reboot, and reload defaults). To reload
defaults: Press the Mode button for less than 5 seconds for a warm boot, or press the Mode button for more than 5 seconds to
reset the switch back to factory default settings and reboot.

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LGB1108A Quick Start Guide
Chapter 3: Network Planning
• Port and System Status LEDs: The switch includes a display panel for system and port indications that simplify installation and
network troubleshooting. The LEDs are located on the left side of the front panels for easy viewing. Details are shown below
and in Tables 2-2 and 2-3:
Table 2-2: Port Status LEDs
LED Conditions Status
TP (Link/ACT)
Green
Lit Green when TP link is good; blinks when any
traffic is present.
TP Speed
Green
Lit Green when the TP link is on 1000 Mbps;
Blinks when the TP link is on 100 Mbps;
Off when the TP link is on 10 Mbps.
SFP (Link/ACT)
Green/Amber
Lit Green when the SFP link is on 1000 Mbps;
Lit Amber when the SFP link is on 100 Mbps;
Blinks when any traffic is present
Table 2-3: System Status LEDs
LED Conditions Status
Power
Green/OFF
Lit when power is on
• Power Supply Socket: There is a standard 120-VAC power socket on the rear panel of the switch.
Figure 2-2. Back panel.

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Chapter 3: Network Planning
3 Network Planning
3.1 Introduction to Switching
A network switch is one of the most important devices for today’s networking technology. It enables simultaneous transmission of multiple
packets, and it can partition a network more efficiently than bridges or routers. When performance bottlenecks are caused by congestion
at the network access point such as a file server, devices can be connected directly to a switched port. And, by using full-duplex mode, the
bandwidth of the dedicated segment can be doubled to maximize throughput.
When networks are based on repeater (hub) technology, the distance between end stations is limited by a maximum hop count. However,
a switch can subdivide the network into smaller and more manageable segments, linking them to the larger network than can turn the hop
count back to zero, removing the limitation.
A switch can be easily configured 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 Switch uses (8), (20), or (44) Gigabit Ethernet TP ports with Auto MDI-X and two slots for the removable SFP module,
which supports a number of types of fiber connections, including LC and BiDi-LC modules. It is not only designed to segment your network,
but also to provide a wide range of options in setting up network connections. Some typical applications showing the 10-Port Gigabit
Managed Switch (LGB1108A) are described below.
NOTE: The LGB1126A and LGB1148A are similar to the LGB1108A, but have (20) or (44) Gigabit ports. The LGB1126A and LGB1148A also have
dual-media SFP/(10/100/1000) ports, which are described in the specifications section of this manual.
• Remote site application in enterprise or small businesses.
• Peer-to-peer application when used in two remote offices.
• Office network.
• High-performance requirement environment.
• Advanced security for network safety applications.
• Data, voice, and videoconferencing applications.
LGB1108A
LGB1108A LGB1108A LGB1108A
Figure 3-1. Network connection between remote site and central site.
LGB1108A Internet

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LGB1108A Quick Start Guide
Chapter 4: Installation
LGB1108A
Figure 3-2. Peer-to-peer network connection
LGB1108A
LGB1108A
Figure 3-3. Office network connection

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Page 14 LGB1108A Quick Start Guide
Chapter 4: Installation
4 Installation
4.1 Selecting a Site
The switch can be mounted in a standard 19-inch equipment rack (via an optional rackmount kit) or on a flat surface. Be sure to 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 104° F (0 to 40° C) and its humidity within 10 to 90%, noncondensing.
• 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 the 10-Port Gigabit Managed Switch is connected to a separate grounded power outlet that provides 100 to 240 VAC, 50 to
60 Hz.
4.2 Ethernet Cabling
To ensure proper operation when installing the switch in 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 a
maximum length of 100 meters (328.1 feet) is recommended for 100BASE-TX and Category 5e or 6 with maximum length of 100 meters
(328.1 feet) is recommend 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 connections.
Figure 4-2. SFP transceiver.
4.3 Equipment Checklist
After unpacking this switch, please check the contents to be sure you have received all the components. Then, before beginning the
installation, be sure you have all other necessary installation equipment.

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LGB1108A Quick Start Guide
Chapter 4: Installation
4.4 What’s Included
•10-, 26-, or 48-Port Gigabit Managed Switch (LGB1108A, LGB1126A, or LGB1148A)
• AC power cord
• (4) Adhesive rubber feet
• Mounting accessory (for 19" rack, optional)
• RS-232 to RJ-45 console cable (for LGB1108A and LGB1126A) or DB9 to DB9 console cable (for LGB1148A)
• This installation guide
• User’s manual on CD
NOTE: Call Black Box immediately if any of these items is missing or damaged.
WARNING: The mini-GBICs are Class 1 Laser Devices. Avoid direct eye exposure to the beam coming from the transmit port.
4.5 Mounting Instructions
The switch can be mounted in a standard 19-inch equipment rack or on a desktop or shelf.
Rackmounting
Before rackmounting the switch, check the following:
• 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 104° F (0 to 40 ° 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 accessory.
Figure 4-3. Attaching the brackets.

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Chapter 4: Installation
Step 2. Mount the device in the rack (using an optional rackmount kit), using four rackmounting screws (not provided). Be sure to
secure the lower rackmounting screws first to prevent the brackets from being bent by the weight of the switch.
Figure 4-4 Installing the switch in a rack.
Step 3. If installing a single switch only, turn to “Connection to a power source“ later in 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 airflow.
Step 3. If installing a single switch only, go to “Connecting to a Power Source” later in 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.

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LGB1108A Quick Start Guide
Chapter 4: Installation
Installing an Optional SFP Transceiver
You can install or remove a mini-GBIC SFP from a mini-GBIC slot without powering off the switch.
NOTE: On the LGB1108A, the mini-GBIC slots are shared with the two 10/100/1000BASE-T RJ-45 ports. If a mini-GBIC is installed
in a slot, the associated RJ-45 port is disabled and cannot be used. The LGB1126A has (4) dual-media SFP/(10/100/11000) RJ-45
and (2) SFP ports. The LGB1148A has (4) dual-media ports SFP/(10/100/1000) RJ-45.
NOTE: The mini-GBIC ports operate only at full-duplex. Half-duplex operation is not supported.
NOTE: Ensure the network cable is NOT connected when you install or remove a mini-GBIC.
Figure 4-6. Inserting an SFP transceiver into a slot.
Table 4-1: Supported SFP Transceivers
Model Name Description
These models are
available. Contact Tech
Support for the correct
SFP for your application.
1000BASE-SX GE SFP Fiber Module, LC Multimode 850 nm
1000BASE-SX GE SFP Fiber Module, LC Multimode 1310 nm 2 km
1000BASE-LX GE SFP Fiber Module, LC Single-Mode 10 km
1000BASE-LX GE SFP Fiber Module, LC Single-Mode 30 km
1000BASE-LX GE SFP Fiber Module, LC Single-Mode 50 km
1000BASE-LX GE SFP Fiber Module, LC Single-Mode 50 km
1000BASE-LX GE SFP Fiber Module, Bidi LC Single-Mode 10 km, 1310 nm
1000BASE-LX GE SFP Fiber Module, Bidi LC Single-Mode 20 km, 1550 nm
1000BASE-LX GE SFP Fiber Module, Bidi LC Single-Mode 20 km, 1310 nm
100BASE-FX FE SFP Fiber Module, LC Multimode 2 km, 850 nm and 1310 nm
100BASE-FX FE SFP Fiber Module, LC Single-Mode 20 km, 1310 nm
To Install an SFP Transceiver
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 not provided in the switch package.

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Chapter 4: Installation
Connecting to a Power Source:
You can plug or remove the power cord from the AC power socket to switch the power on and off .
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 it isn’t, check that the power
cable is plugged in correctly.
WARNING: For international use, you may need to change the AC power cable. You must use a power cable set that has been
approved for the socket type in your country.
Connecting to the Console Port
The RJ-45 serial port on the switch’s front panel is used to connect to the switch for out-of-band console configuration. The
command-line-driven configuration program can be accessed from a terminal or a PC running a terminal emulation program. The
pin assignments used to connect to the serial port are provided in Table 4-2.
Figure 4-7. Serial port (RJ-45) pinout.
Wiring Map for Serial Cable
Table 4-2: Supported SFP Transceivers
Switch’s 8-Pin Serial Port Null Modem PC’s 9-Pin DTE Port
2 RXD (receive data)
<-----------------
3 TXD (transmit data)
3 RXD (receive data)
----------------->
2 RXD (receive data)
5 SGND (Signal ground)
-------------------
5 SGND (Signal ground)
NOTE: No other pins are used.
Figure 4-8. Plug in the console port.

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Chapter 4: Installation
The serial port’s configuration requirements are as follows:
• Default baud rate—115,200 bps
• Character size—8 characters
• Parity—None
• Stop bit—One
• Data bits—8
• Flow control—none
Using Web-based Management
The default values of the managed switch are listed in the table below:
Table 4-3: Using Web-based Management
IP Address 192.168.1.1
Subnet Mask
255.255.255.0
Default
192.168.1.25 4
Username
admin
Password

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Chapter 4: Installation
After configuring the managed switch in the CLI via the switch’s serial interface, you can browse it. For instance, type
“http://192.168.1.1“ [without the quotes] in the address bar in a browser, and it will show the following screen and ask you to
log in. When you log in the first time, the default username is “admin”. and the password field remains blank.
Figure 4-9. Web User Interface screen.
NOTE: If you need to configure the function or parameter, refer to the detail in the User Guide. Or access the switch and click
“help“ under the Web GUI. A help screen will provide you with help content to walk you through the process of setting the
parameters.
Figure 4-10. Web Help Function screen.