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Gigabit PoE+ Ethernet Managed Switch Eco
Installation and Getting Started Guide
• LPB5028A has (20) 10/100/1000BASE-T access ports, (4) 100/1G copper/
fiber combo ports with dual-speed SFP slots, and (4) 10 Gigabit SFP+
uplink ports with dual-speed (1G/10G).
• LPB5052A has (48) 10/100/1000BASE-T access ports, and (4) 10 Gigabit
SFP+ uplink ports with dual-speed (1G/10G).
LPB5028A
LPB5052A
Customer
Support
Information
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
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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.
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.
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.
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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 inter ference 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 emis sion 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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About this Guide
Installation and Getting Started Guide for:
Gigabit PoE+ Ethernet Managed Switch Eco – 24-Port
Gigabit PoE+ Ethernet Managed Switch Eco – 52-Port
About this Guide
This guide gives specific information on how to operate and use the management functions of the Gigabit PoE+ Ethernet
Managed Switch Eco.
The guide is intended for use by network administrators who are responsible for operating and maintaining network equipment;
consequently, it assumes a basic working knowledge of general switch functions, the Internet Protocol (IP), and Simple Network
Management Protocol (SNMP).
The following conventions are used throughout this guide to show information:
NOTE: Emphasizes important information or calls your attention to related features or instructions.
CAUTION: Alerts you to a potential hazard that could cause loss of data, or damage the system or equipment.
WARNING: Alerts you to a potential hazard that could cause personal injury.
Safety Information
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 this switch to an outdoor device, add an arrester on the cable between the outdoor device and this
switch.
NOTE: The switch is indoor device, if it connects with an outdoor device, then it must use a lightning arrester to protect the
switch.
WARNING:
• Do not place the switch outdoors.
• Before installation, make sure the 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 RPS cables to completely remove power from the
unit.
• Before importing/exporting configuration, make sure the firmware version is the same.
• After a firmware upgrade, the switch will update automatically to the latest firmware version.
How to Download the User Manual
The Gigabit PoE+ Ethernet Managed Switch Eco user manual gives specific information on how to operate and use the management functions of the switch:
To download the Gigabit PoE+ Ethernet Managed Switch Eco user manual from the Web site:
1. Go to www.blackbox.com
2. Enter the part number (LPB5028A or LPB5052A) in the search box:
3. Click on the “Resources” tab on the product page, and select the document you wish to download.
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Table of Contents
Contents
1. Overview ..................................................................................................................................................................................8
1.1 Introduction ..................................................................................................................................................................... 8
1.2 Switch Architecture ........................................................................................................................................................... 9
1.3 Network Management Options ........................................................................................................................................ 9
2. Hardware Description .............................................................................................................................................................. 10
2.1 1000BASE-T Ports ............................................................................................................................................................10
2.2 SFP Transceiver Slots .........................................................................................................................................................10
2.3 Port and System LEDs ......................................................................................................................................................10
2.4 Power Supply Socket ........................................................................................................................................................11
2.5 Mode Status LEDs ............................................................................................................................................................11
3. Network Planning ....................................................................................................................................................................12
3.1 Introduction to Switching .................................................................................................................................................12
3.2 Application Examples .......................................................................................................................................................12
4. Installing the Switch ................................................................................................................................................................14
4.1 Selecting a Site .................................................................................................................................................................14
4.2 Ethernet Cabling ..............................................................................................................................................................14
4.3 What’s Included ...............................................................................................................................................................15
4.4 Mounting .........................................................................................................................................................................15
4.4.1 Rackmounting .........................................................................................................................................................15
4.4.2 Desktop or Shelf Mounting ....................................................................................................................................16
4.5 Installing an Optional SFP Transceiver ...............................................................................................................................17
4.6 Connecting to a Power Source ........................................................................................................................................18
4.7 Connecting to the Console Port .......................................................................................................................................18
4.8 Operation of Web-based Management ...........................................................................................................................19
5. Making Network Connections ................................................................................................................................................21
5.1 Connecting Network Devices ........................................................................................................................................... 21
5.2 Twisted-Pair Devices .........................................................................................................................................................21
5.2.1 Cabling Guidelines ..................................................................................................................................................21
5.2.2 Connecting to PCs, Servers, Hubs, and Switches ....................................................................................................21
5.2.3 Network Wiring Connections .................................................................................................................................21
5.3 Fiber Optic SFP Devices ................................................................................................................................................... 22
5.4 Connectivity Rules ........................................................................................................................................................... 23
6. Cable Labeling and Connection Records .................................................................................................................................25
7. Troubleshooting ......................................................................................................................................................................26
7.1 Basic Troubleshooting Tips ...............................................................................................................................................26
7.2 Power and Cooling Problems ...........................................................................................................................................27
7.2.1 Installation ...............................................................................................................................................................27
7.2.2 In-Band Access ........................................................................................................................................................27
7.3 Cables ..............................................................................................................................................................................27
7.3.1 Twisted-Pair Cable and Pin Assignments .................................................................................................................27
7.3.2 10BASE-T/100BASE-TX Pin Assigments .................................................................................................................. 28
7.3.3 Straight-Through Wiring ......................................................................................................................................... 28
7.3.4 Crossover Wiring ................................................................................................................................................... 29
7.3.5 1000BASE-T Pin Assignments ................................................................................................................................ 29
7.3.6 Cable Testing for Existing Category 5 Cable .......................................................................................................... 30
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Table of Contents
7.3.7 Adjusting Existing Category 5 Cabling to Run 1000BASE-T ................................................................................... 30
7.3.8 Fiber Standards ....................................................................................................................................................... 30
8. Specifications...........................................................................................................................................................................31
Glossary ............................................................................................................................................................................... 33
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Chapter 1: Overview
1. Overview
1.1 Introduction
The Gigabit PoE+ Ethernet Managed Switch Eco provides a reliable infrastructure for your business network. The switch improves
the availability of your critical business applications, protects your sensitive information, and optimizes your network bandwidth.
Easy to set up and use, it provides the ideal combination of affordability and capabilities for entry-level networking. Use the switch
in a small business or enterprise application.
Two models are available:
• Gigabit PoE+ Ethernet Managed Switch Eco – 24-Port (product code LPB5028A). This model has (20) 10/100/1000BASE0-T
access ports, (4) copper/fiber combo ports with dual-speed SFP slots, and (4) 10 Gigabit SFP+ uplink ports with dual speed
(1G/10G).
• Gigabit PoE+ Ethernet Managed Switch Eco – 52-Port (product code LPB5052A). This model has (48) 10/100/1000BASE-T
access ports and (4) 10 Gigabit SFP+ uplink slots with dual speed (1G/10G).
Unlike other entry-level network switching solutions that provide advance managed network capabilities only in the costliest
models, the Gigabit PoE+ Ethernet Managed Switch Eco supports data, voice, security, and wireless technologies. The switch is
easy to deploy and configure.
Link/Act LED
Speed LED
PoE LED
System LED
Mode button
Console port
10/100 /10 00BA SE-T
RJ- 45 ports
Switch TP
Port LEDs
Figure 1-1. Front of the LPB5052A Switch.
1G/10G SF P
ports
Switch SFP
Port LEDs
AC power
socket
Figure 1-2. Back of the LPB5028A or LPB5052A Switch.
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Chapter 1: Overview
1.2 Switch Architecture
The switch operates at wire-speed, transporting multiple packets at low latency on all ports simultaneously. The switch also
operates at full-duplex, which effectively doubles the bandwidth of each connection.
For maximum data integrity, the switch uses store-and-forward technology. With this technology, the entire packet is received into
a buffer and checked for validity before it is forwarded. This prevents errors from being propagated throughout the network.
1.3 Network Management Options
You can also manage the switch over the network via a Web browser or Telnet. 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
RS-232 DB9 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. (See Appendix B for wiring options.)
NOTE: For a detailed description of the management features, refer to the user’s manual.
To download the Gigabit PoE+ Ethernet Managed Switch Eco user manual from the Web site:
1. Go to www.blackbox.com
2. Enter the part number (LPB5028A or LPB5052A) in the search box:
3. Click on the “Resources” tab on the product page, and select the document you wish to download.
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Chapter 2: Hardware Description
2. Hardware Description
2.1 1000BASE-T Ports
The LPB5028A switch has (20) 1000BASE-T RJ-45 ports and (4) copper/fiber combo ports with dual-speed SFP slots, and the
LPB5052A switch has (48) 1000BASE-T RJ-45 ports. All RJ-45 ports support automatic MDI/MDI-X operation, auto-negotiation
and IEEE 802.3x auto-negotiation of flow control, so the optimum data rate and transmission can be selected automatically.
2.2 SFP Transceiver Slots
The Gigabit PoE+ Ethernet Managed Switch Eco LPB5028A supports the Small Form Factor Pluggable (SFP) transceiver slots on
ports 21 to 28, and the LPB5052A supports SFP on ports 48 to 52.
Table 2-1 shows a list of transceiver types that have been tested with the switch. For information on the recommended standards
for fiber optic cabling, see “1000 Mbps Gigabit Ethernet Collision Domain” on page X.
Table 2-1. Supported SFP Transceivers.
Product Code Description
LFP401 SFP, 155-Mbps Fiber with Extended Diagnostics, 850-nm Multimode, LC, 2 km
LFP402 SFP, 155-Mbps Fiber with Extended Diagnostics, 1310-nm Multimode, 2 km, LC
LFP403 SFP, 155-Mbps Fiber with Extended Diagnostics, 1310-nm Single-Mode, Plus, 30 km, LC
LF P 411 SFP, 1.25-Gbps Fiber with Extended Diagnostics, 850-nm Multimode, LC, 300 m
LFP412 SFP, 1.25-Gbps Fiber with Extended Diagnostics, 1310-nm Multimode, LC, 2 km
LFP413 SFP, 1.25-Gbps Fiber with Extended Diagnostics, 1310-nm Single-Mode, LC, 10 km
LFP414 SFP, 1.25-Gbps Fiber with Extended Diagnostics, 1310-nm Single-Mode, LC, 30 km
LSP421 10GBASE-SR SFP+, 850-nm Multimode, 300 m, LC
LSP422 10GBASE-SR SFP+, 1310-nm Single-Mode, 10 km, LC
2.3 Port and System LEDs
The Gigabit PoE+ Ethernet Managed Switch Eco switch includes a display panel for system and port indications that simplify
installation and network troubleshooting. The LEDs are located on left-hand side of the front panel for easy viewing. Details are
shown below and described in the following tables.
Table 2-2. Port Status LEDs.
LED Condition Status
TP (Link/ACT) Green/Blinking Lights Green when TP link is good.
Blinks when any traffic is present.
TP SPEED Green/ Yellow Lights Green when TP link on 1000 Mbps.
Yellow when TP link on 10/100 Mbps.
PoE (Link/ACT) Green Lights Green when PoE links with PD and supplies power to PD.
SFP (Link/ACT) Green/Blinking Lights Green when SFP link good.
Blinks when any traffic is present.
SFP SPEED Blue/Green Lights Blue when SFP link on 10Gbps.
Green when SFP link on 1000Mbps
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Chapter 2: Hardware Description
Table 2-3. System Status LED.
LED Condition Status
System LED Green, OFF Lights when power is on and the switch is ready.
2.4 Power Supply Socket
The power socket uses an AC power cord and is located on the rear panel of the switch. See Figure 1-2.
2.5 Mode Status LEDs
The Gigabit PoE+ Ethernet Managed Switch Eco has a mode switch. Each LED can switch between Link/ACT mode and Speed
mode when you press the Mode button. When the switch is on Link/ACT mode, each port's LED indicates the link or activity status. When switch is in Speed mode, each port’s LED shows the link speed status of the port using different colors.
Table 2-4. Mode Status LED.
LED Condition Status
Link/ACT Green Lights when the corresponding port is in Link/ACT mode.
Speed Green Lights when the corresponding port is in Speed mode.
PoE (Link/ACT) Green Lights when the corresponding port is in PoE (Link/ACT) mode.
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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, 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 file server, the device can be connected directly to a switched port. In 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.
A switch can subdivide the network into smaller and more manageable segments, and link them to the larger network.
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 PoE+ Ethernet Managed Switch Eco LPB5028A has 24 Gigabit Ethernet twisted-pair ports with auto MDI-X and 4
slots for removable SFP modules that support LC and BiDi-LC fiberoptic modules. The LPB5052A has 48 Gigabit Ethernet twistedpair ports with auto MDI-X and 4 SFP module slots. The switch not only segments your network, but also provides a wide range
of options in setting up network connections. Some 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 Requirement environment
• Advanced security for network safety application.
• Suitable for data/voice and videoconferencing application.
Server farm
PC
PC
PC
PC
PC
8-port switch
12-port switch
Gigabit PoE+ Ethernet
Managed Switch Eco
(LPB5052A)
Router
PC
PC
Remote site
Figure 3-1. Network connection between remote site and central site.
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10-por t switch
Server farm
Printer
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Chapter 3: Network Planning
Gigabit PoE+ Ethernet
Managed Switch Eco
(LPB5052A)
Switch
Printer
AP server
10-por t switch
Research and
Development (R& D)
PC
Figure 3-2. Peer-to-peer network connection.
Gigabit PoE+
Ethernet Managed
Switch Eco
(LPB5052A)
Router
Sales
Figure 3-3. Office network connection.
PC
8-port switch
PC
Internet
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Chapter 4: Installing the Switch
4. Installing the Switch
4.1 Selecting a Site
The Switch can be mounted in a standard 19-inch equipment rack (via an optional rackmount kit, part number XXXXX??) 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.
• Maintain its temperature within 32 to 104 °F (0 to 40° 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 the 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: Use unshielded twisted pair (UTP) or shielded twisted pair (STP) cable with RJ-45 connectors. Black Box
recommends Category 5 or Category 5e with maximum length of 328 feet (100 meters) for 100BASE-TX, and Category 5e or 6
with maximum length of 328 feet (100 meters) 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.
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Figure 4-2. SFP transceiver.
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Chapter 4: Installing the Switch
4.3 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 info@blackbox.com.
• Gigabit PoE+ Ethernet Managed Switch Eco
• (4) adhesive rubber feet
• 19" Rackmount kit
• AC power cord
• RS-232 DB9 to DB9 Console Cable
To download the getting started and installation guide (this document) and the user manual from the Black Box Web site:
1. Go to www.blackbox.com
2. Enter the part number (LPB5028A or LPB5052A) in the search box:
3. Click on the “Resources” tab on the product page, and select the document you wish to download.
WARNING: The mini-GBICs 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 as follow.
4.4.1 Rackmounting
Before rackmounting the switch, consider 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: Rack-mounted 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: Installing the Switch
Step 2. Mount the device in the rack (via the included rackmount kit), using four rackmounting screws (not provided). Be sure to
secure the lower rackmounting screws first to prevent the brackets from bending from the weight of the switch.
Figure 4-4. Installing the switch in a rack.
Step 3. If installing a single switch only, go to Section 4.6, Connecting 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.
4.4.2 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.
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Chapter 4: Installing the Switch
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 Section 4.6, 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 a mini-GBIC SFP from a mini-GBIC slot without having to power off the switch. Use only compatible
mini-GBICs.
NOTE:
• 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 mini-GBIC ports operate only at full duplex. Half-duplex operation is not supported.
• Make sure the network cable is NOT connected when you install or remove a mini-GBIC.
CAUTION: Use only supported mini-GBICs with your switch. Using unsupported mini-GBICs may cause the switch to malfunction.
Figure 4-6. Inserting an SFP transceiver into a slot.
The SFP slots support the optional SFP transceivers listed in Table 4-1.
Product Code Description
LFP401 SFP, 155-Mbps Fiber with Extended Diagnostics, 850-nm Multimode, LC, 2 km
LFP402 SFP, 155-Mbps Fiber with Extended Diagnostics, 1310-nm Multimode, 2 km, LC
LFP403 SFP, 155-Mbps Fiber with Extended Diagnostics, 1310-nm Single-Mode, Plus, 30 km, LC
LF P 411 SFP, 1.25-Gbps Fiber with Extended Diagnostics, 850-nm Multimode, LC, 300 m
LFP412 SFP, 1.25-Gbps Fiber with Extended Diagnostics, 1310-nm Multimode, LC, 2 km
LFP413 SFP, 1.25-Gbps Fiber with Extended Diagnostics, 1310-nm Single-Mode, LC, 10 km
LFP414 SFP, 1.25-Gbps Fiber with Extended Diagnostics, 1310-nm Single-Mode, LC, 30 km
LSP421 10GBASE-SR SFP+, 850-nm Multimode, 300 m, LC
LSP422 10GBASE-SR SFP+, 1310-nm Single-Mode, 10 km, LC
Table 4-1. Supported SFP Transceivers.
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Chapter 4: Installing the Switch
To install an SFP transceiver, follow these steps:
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.
4.6 Connecting to a Power Source
To switch the power on or off, plug or unplug the power cord from AC power socket.
Figure 4-7. Inserting the power cord into AC power socket.
Step 1. Insert the power cable plug directly into the AC socket located on 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.
4.7 Connecting to the Console Port
The DB9 serial port on the switch’s front panel connects to the switch for out-of-band console configuration. You can access the
command-line-driven configuration program 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.
The DB9 cable is used to connect a terminal or terminal emulator to the switch’s RS-232 command-line interface.
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Figure 4-8. Serial port (DB9 DTE) pinout.
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NOTE: No other pins are used.
Chapter 4: Installing the Switch
Table 4-2. Serial cable wiring.
Function Mnemonic Pin
Carrier CD 1
Receive Data RXD 2
Transmit Data TXD 3
Data Terminal Ready DTR 4
Signal Ground GND 5
Data Set Ready DSR 6
Request to Send RTS 7
Clear to Send CTS 8
Figure 4-9. Plug in the console port.
The Gigabit PoE+ Ethernet Managed Switch Eco’s terminal DB9 console port default values are listed below:
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
4.8 Operation of Web-based Management
The default values of the managed switch are listed below:
IP Address : 192.168.1.1
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.1.254
Username: admin
Password: blank
After you configure the switch in the CLI via the switch’s serial interface, you can browse to it. For instance, type http://192.168.1.1
in the address row in a browser, and the following screen will appear and prompt you to input username and password to login
and access authentication. The default username is “admin” and password is blank (just press enter at password prompt). For
first-time use, enter the default username and password, and then click the Enter button. The login process is now completed.
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Chapter 4: Installing the Switch
Figure 4-10. Windows security screen.
NOTE: If you need to re-configure a function or parameter, refer the detail in the User Guide. Or you could access the Switch and
click “help” under the web GUI and a help screen will pop-up to teach you how to set the parameters.
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Chapter 5: Making Network Connections
5. Making Network Connections
5.1 Connecting Network Devices
You can connect the switch to 10-, 100- or 1000-Mbps network cards in PCs and servers, as well as to other switches and hubs.
You can also connect the switch to remote devices using optional SFP transceivers.
5.2 Twisted-Pair Devices
Each device requires an unshielded twisted-pair (UTP) cable with RJ-45 connectors at both ends. Use Category 5, 5e, or 6 cable
for 1000BASE-T connections, or Category 5 or better for 100BASE-TX connections.
5.2.1 Cabling Guidelines
The RJ-45 ports on the switch support automatic MDI/MDI-X pinout configuration, so you can use standard straight-through
twisted-pair cables to connect to any other network device (PCs, servers, switches, routers, or hubs).
See Appendix B for more information on cabling.
CAUTION: Do not plug a phone jack connector into an RJ-45 port. This will damage the switch. Use only twisted-pair cables with
RJ-45 connectors that conform to FCC standards.
5.2.2 Connecting to PCs, Servers, Hubs, and Switches
Step 1. Attach one end of a twisted-pair cable segment to the device’s RJ-45 connector.
Step 2. If the device is a network card and the switch is in the wiring closet, attach the other end of the cable segment to a
modular wall outlet that is connected to the wiring closet. (See the section “Network Wiring Connections.”) Otherwise, attach
the other end to an available port on the switch.
Make sure each twisted pair cable is 328 feet (100 meters) long or less.
NOTE: Avoid using flow control on a port connected to a hub unless it is actually required to solve a problem. Otherwise, back-
pressure jamming signals may degrade overall performance for the segment attached to the hub.
Step 3. As each connection is made, the Link LED (on the switch) corresponding to each port will light green (1000 Mbps) or yellow (100 Mbps) to indicate that the connection is valid.
5.2.3 Network Wiring Connections
A punch-down block is an integral part of many equipment racks. It is actually part of the patch panel. Instructions for making
connections in the wiring closet with this type of equipment follow.
Step 1. Attach one end of a patch cable to an available port on the switch, and the other end to the patch panel.
Step 2. If not already in place, attach one end of a cable segment to the back of the patch panel where the punch-down block is
located, and the other end to a modular wall outlet.
Step 3. Label the cables to simplify future troubleshooting. See Chapter 6, Cable Labeling and Connection Records.
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Chapter 5: Making Network Connections
Figure 5-1. Network wiring connections.
5.3 Fiber Optic SFP Devices
An optional Gigabit SFP transceiver can be used for a backbone connection between switches, or for connecting to a high-speed
server.
Each single-mode fiber port requires 9/125 micron single-mode fiber optic cable with an LC connector at both ends. Each
multimode fiber optic port requires 50-/125- or 62.5-/125-micron multimode fiber optic cabling with an LC connector at both
ends.
WARNING: This switch uses lasers to transmit signals over fiber optic cable. The lasers are inherently eye safe in normal operation.
Users should never look directly at a transmit port when it is powered on.
WARNING: When selecting a fiber SFP device, make sure that it can function at a temperature that is not less than the
recomended maximum operational temperature of the product. You must also use an approved laser SFP transceiver.
Step 1. Remove and keep the LC port’s rubber plug. When not connected to a fiber cable, the rubber plug should be replaced to
protect the optics.
Step 2. Check that the fiber terminators are clean. You can clean the cable plugs by wiping them gently with a clean tissue or cotton ball moistened with a little ethanol. Dirty fiber terminators on fiber optic cables will impair the quality of the light transmitted
through the cable and lead to degraded performance on the port.
Step 3. Connect one end of the cable to the LC port on the switch and the other end to the LC port on the other device. Since
LC connectors are keyed, the cable can be attached in only one orientation.
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Chapter 5: Making Network Connections
Figure 5-2. Making fiber port connections.
Step 4. As a connection is made, check the Link LED on the switch corresponding to the port to be sure that the connection is
valid.
The fiber optic ports operate at 1 Gbps. The maximum length for fiber optic cable operating at Gigabit speed will depend on the
fiber type as listed under 1000 Mbps Gigabit Ethernet Collision Domain in Section 5.4.
5.4 Connectivity Rules
When adding hubs to your network, note that because switches break up the path for connected devices into separate collision
domains, you should not include the switch or connected cabling in your calculations for cascade length involving other devices.
1000BASE-T Cable Requirements
All Category 5 UTP cables that are used for 100BASE-TX connections should also work for 1000BASE-T, if all four wire pairs are
connected. For all critical connections, or any new cable installations, we recommend using Category 5e or Category 6 cable. The
Category 5e and 6 specifications include test parameters that are only recommendations for Category 5. The first step in preparing existing Category 5 cabling for running 1000BASE-T is a simple test of the cable installation to be sure that it complies with
the IEEE 802.3-2005 standards.
1000-Mbps Gigabit Ethernet Collision Domain
Table 5-1. Maximum 1000BASE-T Gigabit Ethernet cable length.
Cable Type Maximum Cable Length Connector
Category 5, 5e, or 6 100-ohm UTP or STP 328 feet (100 m) RJ-45
Table 5-2: Maximum 1000BASE-SX Gigabit Fiber cable lengths.
Fiber Size Fiber Bandwidth Maximum Cable Length Connector
62.5/125 micron multimode fiber 165 MHz/km
200 MHz/km
722 ft. (220 m)
902 ft. (275 m)
LC
LC
50/125 micron multimode fiber 400 MHz/km
1641 ft. (500 m)
500 MHz/km
1805 ft. (550 m)
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LC
LC
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Chapter 5: Making Network Connections
Table 5-3. Maximum 1000BASE-LX/LHX/XD/ZX Gigabit Fiber cable length.
Fiber Size Fiber Bandwidth Maximum Cable Length Connector
9/125 micron single-mode fiber 1310 nm N/A 6.2 miles (10 km) LC
9/125 micron single-mode fiber 1550 nm N/A 18.64 miles (30 km)
Table 5-4. Maximum 1000BASE-LX Single Fiber Gigabit fiber cable length.
Fiber Size Fiber Bandwidth Maximum Cable Length Connector
31.06 miles (50 km)
LC
LC
Single-mode
TX-1310 nm
RX-1550 nm
Single-mode
TX-1550 nm
RX-1310 nm
Cable Type Maximum Cable Length Connector
Category 5, 5e or 6 100-ohm UTP or STP 328 ft (100 m) RJ-45
N/A 12.42 miles (20 km) BIDI
LC
N/A 12.42 miles (20 km) BIDI
LC
Table 5-5. Maximum Fast Ethernet cable lengths.
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Chapter 6: Cable Labeling and Connection Records
6. Cable Labeling and Connection Records
When planning a network installation, it is essential to label the opposing ends of cables and to record where each cable is
connected. This will allow users to easily locate interconnected devices, isolate faults, and change your topology easily.
To best manage the physical implementations of your network, follow these guidelines:
• Clearly label the opposing ends of each cable.
• Using your building’s floor plans, draw a map of the location of all network-connected equipment. For each piece of equipment,
identify the devices to which it is connected.
• Note the length of each cable and the maximum cable length supported by the switch ports.
• For ease of understanding, use a location-based key when assigning prefixes to your cable labeling.
• Use sequential numbers for cables that originate from the same equipment.
• Differentiate between racks by naming accordingly.
• Label each separate piece of equipment.
• Display a copy of your equipment map, including keys to all abbreviations, at each equipment rack.
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Chapter 7: Troubleshooting
7. Troubleshooting
7.1 Basic Troubleshooting Tips
Most problems are caused by the following situations. Check for these items first when starting your troubleshooting:
Connecting to devices that have a fixed full duplex configuration.
The RJ-45 ports are configured as “Auto,” that is, when connecting to the attached devices, the switch will operate in one of two
ways to determine the link speed and the communication mode (half duplex or full duplex):
• If the connected device is also configured to Auto, the switch will automatically negotiate both link speed and communication
mode.
• If the connected device has a fixed configuration, for example 100 Mbps, at half- or full-duplex, the switch will automatically
sense the link speed, but will default to a communication mode of half-duplex.
Because the Gigabit PoE+ Ethernet Managed Switch Eco behaves in this way (in compliance with the IEEE 802.3 standard), if a
device connected to the switch has a fixed configuration of full-duplex, the device will not connect correctly to the switch. The
result will be high error rates and very inefficient communications between the switch and the device.
Make sure all devices connected to the Gigabit PoE+ Ethernet Managed Switch Eco are configured to auto negotiate, or are
configured to connect at half-duplex (all hubs are configured this way, for example).
Faulty or loose cables.
Look for loose or obviously faulty connections. If they appear to be OK, make sure the connections are snug. If that does not correct the problem, try a different cable.
Non-standard cables.
Non-standard and miswired cables may cause network collisions and other network problems, and can seriously impair network
performance. Use a new correctly-wired cable. For pinouts and correct cable wiring. A category 5 cable tester is a recommended
tool for every 100BASE-TX and 1000BASE-T network installation.
Improper Network Topologies.
Make sure you have a valid network topology. If you no longer experience the problems, the new topology is probably at fault. In
addition, you should make sure that your network topology contains no data path loops.
Check the port configuration.
A port on your Gigabit PoE+ Ethernet Managed Switch Eco may not be operating as you expect because it has been put into a
“blocking” state by Spanning Tree, GVRP (automatic VLANs), or LACP (automatic trunking). (Note that the normal operation of
the Spanning Tree, GVRP, and LACP features may put the port in a blocking state.) Or, the port just may have been configured as
disabled through software.
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Chapter 7: Troubleshooting
Table 7-1. Troubleshooting chart.
Symptom Action
System LED is
Off
Link LED is Off • Verify that the switch and attached device are powered on.• Be sure the cable is plugged into the
7.2 Power and Cooling Problems
7.2.1 Installation
If the System indicator does not turn on when the power cord is plugged in, you may have a problem with the power outlet,
power cord, or internal power supply. However, if the unit powers off after running for a while, check for loose power connections, power losses, or surges at the power outlet. If you still cannot isolate the problem, the internal power supply may be
defective. Verify that all system components have been properly installed. If one or more components appear to be
malfunctioning (such as the power cord or network cabling), test them in an alternate environment where you are sure that all
the other components are functioning properly.
• Check connections between the switch, the power cord, and the wall outlet.
• Contact your dealer for assistance.
switch and corresponding device.
• If the switch is installed in a rack, check the connections to the punch-down block and patch panel.
• Verify that the proper cable type is used and its length does not exceed specified limits.
• Check the adapter on the attached device and cable connections for possible defects. Replace the
defective adapter or cable if necessary.
7.2.2 In-Band Access
You can access the management agent in the switch from anywhere within the attached network using Telnet, a Web browser.
However, you must first configure the switch with a valid IP address, subnet mask, and default gateway. If you have trouble establishing a link to the management agent, check to see if you have a valid network connection. Then verify that you entered the
correct IP address. Also, be sure the port through which you are connecting to the switch has not been disabled. If it has not
been disabled, then check the network cabling that runs between your remote location and the switch.
NOTE: The management agent accepts up to four simultaneous Telnet sessions. If the maximum number of sessions already
exists, an additional Telnet connection will not be able to log into the system.
7.3 Ca ble s
7.3.1 Twisted-Pair Cable and Pin Assignments
For 10/100BASE-TX connections, the twisted-pair cable must have two pairs of wires. For 1000BASE-T connections, the twistedpair cable must have four pairs of wires. Each wire pair is identified by two different colors. For example, one wire might be green
and the other, green with white stripes. Also, an RJ-45 connector must be attached to both ends of the cable.
CAUTION: DO NOT plug a phone jack connector into any RJ-45 port. Use only twisted-pair cables with RJ-45 connectors that
conform to FCC standards.
CAUTION: Each wire pair must be attached to the RJ-45 connectors in a specific orientation.
The figure below illustrates how the pins on the RJ-45 connector are numbered. Be sure to hold the connectors in the same
orientation when attaching the wires to the pins.
Figure 7-1. RJ-45 connector pin numbers.
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Chapter 7: Troubleshooting
7.3.2 10BASE-T/100BASE-TX Pin Assignments
Use unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for RJ-45 connections: 100-ohm Category 3 or better cable
for 10 Mbps connections, or 100-ohm Category 5 or better cable for 100 Mbps connections. Also be sure that the length of any
twisted-pair connection does not exceed 328 feet (100 meters).
The RJ-45 ports on the switch base unit support automatic MDI/MDI-X operation, so you can use straight-through cables for all
network connections to PCs or servers, or to other switches or hubs. In straight-through cable, pins 1, 2, 3, and 6, at one end of
the cable, are connected straight through to pins 1, 2, 3, and 6 at the other end of the cable. When using any RJ-45 port on this
switch, you can use either straight-through or crossover cable.
Table 7-2. 10/100BASE-TX MDI and MDI-X port pinouts.
Pin MDI Signal Name MDI-X Signal Name
1 Transmit Data plus (TD+) Receive Data plus (RD+)
2 Transmit Data minus (TD-) Receive Data minus (RD-)
3 Receive Data plus (RD+) Transmit Data plus (TD+)
6 Receive Data minus (RD-) Transmit Data minus (TD-)
4, 5, 7, 8 Not used Not used
NOTE: The “+” and “-” signs represent the polarity of the wires that make up each wire pair.
If the twisted-pair cable is to join two ports and only one of the ports has an internal crossover (MDI-X), the two pairs of wires
must be straight-through. (When auto-negotiation is enabled for any RJ-45 port on this switch, you can use either straightthrough or crossover cable to connect to any device type.)
You must connect all four wire pairs as shown in the following diagram to support Gigabit Ethernet.
7.3.3 Straight-through Wiring
Figure 7-2. EIA/TIA 568B RJ-45 wiring standard 10/100BASE-TX straight-through cable.
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Chapter 7: Troubleshooting
7.3.4 Crossover Wiring
If the twisted-pair cable is to join two ports and either both ports are labeled with an “X” (MDI-X) or neither port is labeled with
an “X” (MDI), a crossover must be implemented in the wiring. (When auto-negotiation is enabled for any RJ-45 port on this
switch, you can use either straight-through or crossover cable to connect to any device type.)
You must connect all four wire pairs as shown in the following diagram to support Gigabit Ethernet.
Figure 7-3. EIA /TIA 568B RJ-45 wiring standard 10/100BASE-TX crossover cable.
7.3.5 1000BASE-T Pin Assignments
All 1000BASE-T ports support automatic MDI/MDI-X operation, so you can use straight-through cables for all network connections to PCs or servers, or to other switches or hubs.
The table below shows the 1000BASE-T MDI and MDI-X port pinouts. These ports require that all four pairs of wires be
connected.
NOTE: For 1000BASE-T operation, all four pairs of wires are used for both transmit and receive.
Use 100-ohm Category 5, 5e or 6 unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for 1000BASE-T connections.
Also be sure that the length of any twisted-pair connection does not exceed 328 feet (100 meters).
Table 7-3. 1000BASE-T MDI and MDI-X port pinouts.
Pin MDI Signal Name MDI-X Signal Name
1 Bi-directional Pair A Plus (BI_DA+) Bi-directional Pair B Plus (BI_DB+)
2 Bi-directional Pair A Minus (BI_DA-) Bi-directional Pair B Minus (BI_DB-)
3 Bi-directional Pair B Plus (BI_DB+) Bi-directional Pair A Plus (BI_DA+)
4 Bi-directional Pair C Plus (BI_DC+) Bi-directional Pair D Plus (BI_DD+)
5 Bi-directional Pair C Minus (BI_DC-) Bi-directional Pair D Minus (BI_DD-)
6 Bi-directional Pair B Minus (BI_DB-) Bi-directional Pair A Minus (BI_DA-)
7 Bi-directional Pair D Plus (BI_DD+) Bi-directional Pair C Plus (BI_DC+)
8 Bi-directional Pair D Minus (BI_DD-) Bi-directional Pair C Minus (BI_DC-)
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Chapter 7: Troubleshooting
7.3.6 Cable Testing for Existing Category 5 Cable
Installed Category 5 cabling must pass tests for Attenuation, Near-End Crosstalk (NEXT), and Far-End Crosstalk (FEXT). This cable
testing information is specified in the ANSI/TIA/EIA-TSB-67 standard. Additionally, cables must also pass test parameters for
Return Loss and Equal-Level Far-End Crosstalk (ELFEXT). These tests are specified in the ANSI/TIA/EIA-TSB-95 Bulletin, “The
Additional Transmission Performance Guidelines for 100 Ohm 4-Pair Category 5 Cabling.”
NOTE: When testing your cable installation, be sure to include all patch cables between switches and end devices.
7.3.7 Adjusting Existing Category 5 Cabling to Run 1000BASE-T
If your existing Category 5 installation does not meet one of the test parameters for 1000BASE-T, there are basically three measures that can be applied to try and correct the problem:
1. Replace any Category 5 patch cables with high-performance Category 5e or Category 6 cables.
2. Reduce the number of connectors used in the link.
3. Reconnect some of the connectors in the link.
7.3.8 Fiber Standards
The International Telecommunication Union (ITU-T) has standardized various fiber types for data networks. These are summarized
in the following table.
Table 7-4. Fiber standards.
ITU-T Standard Description Application
G.651 Multimode Fiber
50/125-micron core
G.652 Non-Dispersion-Shifted Fiber
Single-mode, 9/125-micron core
G.652.C Low Water Peak Non-Dispersion-Shifted Fiber
Single-mode, 9/125-micron core
G.653 Dispersion-Shifted Fiber
Single-mode, 9/125-micron core
G.654 1550-nm Loss-Minimized Fiber
Single-mode, 9/125-micron core
G.655 Non-Zero Dispersion-Shifted Fiber
Single-mode, 9/125-micron core
Short-reach connections in the 1300-nm or 850-nm band
Longer spans and extended reach. Optimized for operation
in the 1310- nm band, but can also be used in the 1550-nm
band.
Longer spans and extended reach. Optimized for
wavelength-division multiplexing (WDM) transmission across
wavelengths from 1285 to 1625 nm. The zero dispersion
wavelength is in the 1310-nm region.
Longer spans and extended reach. Optimized for
operation in the region from 1500 to 1600-nm.
Extended long-haul applications. Optimized for high-power
transmission in the 1500 to 1600-nm region, with low loss
in the 1550-nm band.
Extended long-haul applications. Optimized for high-power
dense wavelength-division multiplexing (DWDM) operation
in the region from 1500 to 1600-nm.
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Chapter 10: Specifications
10. Specifications
Physical Characteristics
Aggregate Bandwidth 28 Gbps
Buffer Architecture 4096 bytes on-chip frame buffer
Network Interface Ports 1–24 (LPB5028A) or Ports 1–48 (LPB5052A): 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)
*Maximum Cable Length = 328 ft (100 m)
Ports 24–28 (LPB5028A) or 48–52 (LPB5052A): 1G/10G SFP ports
Ports LPB5028A:
(20) 10 /100 /1000BASE0-T access por ts,
(4) copper/fiber combo ports with dual-speed SFP slots,
(4) 10 Gigabit SFP+ uplink ports with dual speed (1G/10G),
(1) DB9 console port;
LPB5052A:
(4 8) 10/100 /1000BASE-T access ports,
(4) 10 Gigabit SFP+ uplink slots with dual speed (1G/10G),
(1) DB9 console port
Switching Database 32K MAC address entries
Connectors LPB5028A: (24) RJ-45, (4) SFP slots, (4) SFP+ slots;
LPB5052A: (48) RJ-45, (4) SFP+ slots
Indictators LEDs:
System: Power;
TP Port: Status (LINK/ACT/SPD), 10/100/1000M;
SFP Port: Status (LINK/ACT/SPD), 1G/10G
Temperature Operating: 32°F to 104°F (0°C to 40°C)
Humidity Operating: 5% to 90% (non-condensing)
Power Input: 100–240 VAC, 50–60 Hz;
Power Supply: Internal: 100 to 240 VAC, 50 to 60 Hz;
Consumption: 60 Watts maximum
Dimensions 1.7"H x 17.4"W x 11.8"D (4.4 x 44.2 x 30 cm)
Weight LPB5028A: 8.6 lb. (3.9 kg);
LPB5052A: 9.0 lb. (4.1 kg)
Switch Features
Flow Control Full-duplex: IEEE 802.3x;
Half-duplex: Backpressure
Forwarding Mode Store-and-forward
Throughput 95.23 Mbps
Management Features
In-Band Management SSH/SSL, Telnet, SNMP, or HTTP
Out-of-Band
Management
Software Loading HTTP, TFTP in-band, Console out-of-band
RS-232 (DB9) console port
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Chapter 10: Specifications
Switch Features (continued)
Approvals 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
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 => ink Aggregation Control Protocol (LACP);
IEEE 802.1AB => Link Layer Discovery Protocol (LLDP)
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Glossary
Glossary
10BASE-T: IEEE 802.3 specification for 10 Mbps Ethernet over two pairs of Category 3, 4, or 5 UTP cable.
100BASE-TX: IEEE 802.3u specification for 100 Mbps Ethernet over two pairs of Category 5 UTP cable.
1000BASE-LH: Specification for long-haul Gigabit Ethernet over two strands of 9/125 micron core fiber cable.
1000BASE-LX IEEE 802.3z: Specification for Gigabit Ethernet over two strands of 50/125, 62.5/125 or 9/125 micron core fiber
cable.
1000BASE-SX: IEEE 802.3z specification for Gigabit Ethernet over two strands of 50/125 or 62.5/125 micron core fiber cable.
1000BASE-T: IEEE 802.3ab specification for Gigabit Ethernet over 100-ohm Category 5, 5e or 6 twisted-pair cable (using all four
wire pairs).
Autonegotiation: Signaling method allowing each node to select its optimum operational mode (speed and duplex mode)
based on the capabilities of the node to which it is connected.
Bandwidth: The difference between the highest and lowest frequencies available for network signals. Also synonymous with
wire speed, the actual speed of the data transmission along the cable.
Collision Domain: Single CSMA/CD LAN segment.
CSMA/CD: CSMA/CD (Carrier Sense Multiple Access/Collision Detect) is the communication method employed by Ethernet,
Fast Ethernet, and Gigabit Ethernet.
End Station: A workstation, server, or other device that does not forward traffic.
Ethernet: A network communication system developed and standardized by DEC, Intel, and Xerox, were using baseband
transmission, CSMA/CD access, logical bus topology, and coaxial cable. The successor IEEE 802.3 standard provides for integration
into the OSI model and extends the physical layer and media with repeaters and implementations that operate on fiber, thin coax
and twisted-pair cable.
Fast Ethernet: A 100-Mbps network communication system based on Ethernet and the CSMA/CD access method.
Full-Duplex: Transmission method that allows two network devices to transmit and receive concurrently, effectively doubling the
bandwidth of that link.
Gigabit Ethernet: A 1000-Mbps network communication system based on Ethernet and the CSMA/CD access method.
IEEE: Institute of Electrical and Electronic Engineers.
IEEE 802.3: Define carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer
specifications.
IEEE 802.3AB: Define CSMA/CD access method and physical layer specifications for 1000BASE-T Gigabit Ethernet. (Now incorporated in IEEE 802.3-2005.)
IEEE 802.3U: Define CSMA/CD access method and physical layer specifications for 100BASE-TX Fast Ethernet. (Now incorporated
in IEEE 802.3-2005.)
IEEE 802.3X: Define Ethernet frame start/stop requests and timers used for flow control on full-duplex links. (Now incorporated
in IEEE 802.3-2005.)
IEEE 802.3Z: Define CSMA/CD access method and physical layer specifications for 1000BASE Gigabit Ethernet. (Now incorporated in IEEE 802.3-2005.)
LAN Segment: Separate LAN or collision domain.
LED: Light emitting diode used for monitoring a device or network condition.
Local Area Network (LAN): A group of interconnected computer and support devices,
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Glossary
Media Access Control (MAC): A portion of the networking protocol that governs access to the transmission medium, facilitating
the exchange of data between network nodes.
MIB: An acronym for Management Information Base. It is a set of database objects that contains information about the device.
Modal Bandwidth: Bandwidth for multimode fiber is referred to as modal bandwidth because it varies with the modal field (or
core diameter) of the fiber. Modal bandwidth is specified in units of MHz per km, which indicates the amount of bandwidth supported by the fiber for a one km distance.
Network Diameter: Wire distance between two end stations in the same collision domain.
RJ-45 Connector: A connector for twisted-pair wiring.
Switched Ports: Ports that are on separate collision domains or LAN segments.
TIA: Telecommunications Industry Association.
Transmission Control Protocol/Internet Protocol (TCP/IP): Protocol suite that includes TCP as the primary transport protocol,
and IP as the network layer protocol.
User Datagram Protocol (UDP): UDP provides a datagram mode for the packet-switched communications. It uses the IP as the
underlying transport mechanism to provide access to IP-like services.
UDP packets are delivered just like IP packets—connection-less data grams that may be discarded before reaching their targets.
UDP is useful when TCP would be too complex, too slow, or just unnecessary.
UTP: Unshielded twisted-pair cable.
Virtual LAN (VLAN): A Virtual LAN is a collection of network nodes that share the same collision domain regardless of their
physical location or connection point in the network. A VLAN serves as a logical workgroup with no physical barriers, allowing
users to share information and resources as though located on the same LAN.
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LPB5028A Installation and Getting Started Guide, version 2
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