Dell PowerConnect 2124, PowerConnect 2508, PowerConnect 2016, PowerConnect 2024 System Information Manual

Dell™ PowerConnect™ Unmanaged Switches

System Information Guide

系统信息指南

系統資訊指南

Příručka informací o systému

Guide d'informations du système

Systeminformationshandbuch

Rendszerinformációs útmutató

システム情報ガイド

시스템 정보 설명서

Podręcznik
z informacjami
o systemie

Guia de informações do
sistema

Информационное
руководство по системе

Informačná príručka o systéme

Priročnik z informacijami o sistemu

Información del sistema

Models PowerConnect 2016, PowerConnect 2024, PowerConnect 2124, PowerConnect 2508

www.dell.com | support.dell.com

Dell™ PowerConnect™ Unmanaged Switches

System Information Guide

www.dell.com | support.dell.com

Notes, Notices, and Cautions

NOTE: A NOTE indicates important information that helps you make better use of your system.

NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you

how to avoid the problem.

CAUTION: A CAUTION indicates a potential for property damage, personal injury,

or death.

____________________

Information in this document is subject to change without notice.
© 2002 – 2003 Dell Computer Corporation. All rights reserved.

Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden.
Trademarks used in this text: Dell, the DELL logo, PowerEdge, PowerVault, and PowerConnect are trademarks of

Dell Computer Corporation; EMC is the registered trademark of EMC Corporation.
Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and

names or their products. Dell Computer Corporation disclaims any proprietary interest in trademarks and trade names
other than its own.

March 2003 P/N 0X851 Rev. A01

Contents

CAUTION: Safety Instructions. . . . . . . . . . . . . . . . . . . 5

General

Rack Mounting of Systems

Modems, Telecommunications, or
Local Area Network Options

Products With Laser Devices

When Working Inside Your System . . . . . . . . . . . . . . . . . 9

Protecting Against Electrostatic Discharge

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

. . . . . . . . . . . . . . . . . . . . 7

. . . . . . . . . . . . . . . . . . . 8

. . . . . . . . . . . . . . . . . . 9

. . . . . . . . . . . 9

About This Guide

Finding Information and Assistance

Getting Started/Setup

Package Contents

. . . . . . . . . . . . . . . . . . . . . . . . . . 10

. . . . . . . . . . . . . . . . 10

. . . . . . . . . . . . . . . . . . . . . . . 11

. . . . . . . . . . . . . . . . . . . . . . . . 11

Before You Connect to the Network:
Mounting Kit Instructions

Additional Information

Regulatory Notices

. . . . . . . . . . . . . . . . . . . . . . . . . 12

FCC Notices (U.S. Only)

IC Notice (Canada Only)

CE Notice (European Union)

. . . . . . . . . . . . . . . . . . . . 11

. . . . . . . . . . . . . . . . . . . . . 11

. . . . . . . . . . . . . . . . . . . . . 12

. . . . . . . . . . . . . . . . . . . . . 14

. . . . . . . . . . . . . . . . . . 14

Simplified Chinese Class A Warning Notice (China Only)

EN 55022 Compliance (Czech Republic Only)

VCCI Notice (Japan Only)

MIC Notice (Republic of Korea Only)

. . . . . . . . . . . . . . . . . . . . 16

. . . . . . . . . . . . . . 17

Polish Center for Testing and Certification Notice

BSMI Notice (Taiwan Only)

NOM Information (Mexico Only)

. . . . . . . . . . . . . . . . . . . 21

. . . . . . . . . . . . . . . . 23

. . . . . 15

. . . . . . . . . . 15

. . . . . . . . 18

Contents 3

Limited Warranties and Return Policy. . . . . . . . . . . . . . . 23

Limited Warranty for Dell-Branded Hardware Products
(U.S. Only)

"Total Satisfaction" Return Policy (U.S. Only)

. . . . . . . . . . . . . . . . . . . . . . . . . . . 23

. . . . . . . . . . 27

Limited Warranty Terms for Dell-Branded Hardware
Products (Canada Only)

"Total Satisfaction" Return Policy (Canada Only)

Dell Software and Peripherals (Canada Only)

. . . . . . . . . . . . . . . . . . . . 28

. . . . . . . . 31

. . . . . . . . . . 32

One-Year End-User Manufacturer Guarantee
(Latin America and the Caribbean Only)

. . . . . . . . . . . . 32

4 Contents

CAUTION: Safety Instructions

Use the following safety guidelines to help ensure your own personal safety and to help protect your system and
working environment from potential damage.

CAUTION: The power supplies in your system may produce high voltages and energy

hazards, which can cause bodily harm. Only trained service technicians are authorized to
remove the covers and access any of the components inside the system. This warning
applies to Dell™ PowerEdge™ servers, Dell PowerVault™ storage systems, and Dell
PowerConnect™ switches.

CAUTION: This system may have more than one power supply cable. To reduce the risk of

electrical shock, a trained service technician must disconnect all power supply cables
before servicing the system.

VAROVÁNÍ: Tento systém může mít více napájecích kabelů. Ke snížení rizika úrazu

elektrickým proudem je nutné, aby školený servisní technik před prováděním servisu
systému odpojil všechny napájecí kabely.

FORSIGTIG: Dette system kan have mere end et strømforsyningskabel. For at reducere

risikoen for elektrisk stød, bør en professionel servicetekniker frakoble alle
strømforsyningskabler, før systemet serviceres.

TÄRKEÄÄ: Tässä järjestelmässä voi olla useampi kuin yksi virtajohto. Sähköiskuvaaran

pienentämiseksi ammattitaitoisen huoltohenkilön on irrotettava kaikki virtajohdot ennen
järjestelmän huoltamista.

ПРЕДУПРЕЖДЕНИЕ: Данная система может иметь несколько кабелей электропитания.

Во избежание электрического удара квалифицированный техник должен отключить
все кабели электропитания прежде, чем приступить к обслуживанию системы.

UWAGA: System ten może mieć więcej niż jeden kabel zasilania. Aby zmniejszyć ryzyko

porażenia prądem, przed naprawą lub konserwacją systemu wszystkie kable zasilania
powinny być odłączone przez przeszkolonego technika obsługi.

ADVARSEL! Det er mulig at dette systemet har mer enn én strømledning. Unngå fare for

støt: En erfaren servicetekniker må koble fra alle strømledninger før det utføres service
på systemet.

General

• Observe and follow service markings. Do not service any product except as explained in your system
documentation. Opening or removing covers that are marked with the triangular symbol with a lightning
bolt may expose you to electrical shock. Components inside these compartments should be serviced only
by a trained service technician.

Unmanaged Switches System Information Guide 5

CAUTION: Safety Instructions (continued)

• If any of the following conditions occur, unplug the product from the electrical outlet and replace the part
or contact your trained service provider:

– The power cable, extension cable, or plug is damaged.

– An object has fallen into the product.

– The product has been exposed to water.

– The product has been dropped or damaged.

– The product does not operate correctly when you follow the operating instructions.

• Keep your system away from radiators and heat sources. Also, do not block cooling vents.

• Do not spill food or liquids on your system components, and never operate the product in a wet

www.dell.com | support.dell.com

environment. If the system gets wet, see the appropriate section in your troubleshooting guide or contact
your trained service provider.

• Do not push any objects into the openings of your system. Doing so can cause fire or electric shock by
shorting out interior components.

• Use the product only with approved equipment.

• Allow the product to cool before removing covers or touching internal components.

• Operate the product only from the type of external power source indicated on the electrical ratings label. If
you are not sure of the type of power source required, consult your service provider or local power company.

NOTICE: To help avoid damaging your system, be sure the voltage selection switch (if provided)

on the power supply is set for the voltage that most closely matches the AC power available in
your location. Also be sure that your monitor and attached devices are electrically rated to
operate with the power available in your location.

• Use only approved power cable(s). If you have not been provided with a power cable for your system or for
any AC-powered option intended for your system, purchase a power cable that is approved for use in your
country. The power cable must be rated for the product and for the voltage and current marked on the
product's electrical ratings label. The voltage and current rating of the cable should be greater than the
ratings marked on the product.

• To help prevent electric shock, plug the system and peripheral power cables into properly grounded
electrical outlets. These cables are equipped with three-prong plugs to help ensure proper grounding. Do
not use adapter plugs or remove the grounding prong from a cable. If you must use an extension cable, use
a 3-wire cable with properly grounded plugs.

• Observe extension cable and power strip ratings. Make sure that the total ampere rating of all products
plugged into the extension cable or power strip does not exceed 80 percent of the ampere ratings limit for
the extension cable or power strip.

• To help protect your system from sudden, transient increases and decreases in electrical power, use a surge
suppressor, line conditioner, or uninterruptible power supply (UPS).

• Position system cables and power cables carefully; route cables so that they cannot be stepped on or tripped
over. Be sure that nothing rests on any cables.

• Do not modify power cables or plugs. Consult a licensed electrician or your power company for site
modifications. Always follow your local/national wiring rules.

6 Unmanaged Switches System Information Guide

CAUTION: Safety Instructions (continued)

• To help avoid possible damage to the system board, wait 5 seconds after turning off the system before
removing a component from the system board or disconnecting a peripheral device from the system.

• Handle batteries carefully. Do not disassemble, crush, puncture, short external contacts, dispose of in fire
or water, or expose batteries to temperatures higher than 60 degrees Celsius (140 degrees Fahrenheit). Do
not attempt to open or service batteries; replace batteries only with batteries designated for the product.

• When connecting or disconnecting power to hot-pluggable power supplies, if offered with your system,
observe the following guidelines:

– Install the power supply before connecting the power cable to the power supply.

– Unplug the power cable before removing the power supply.

– If the system has multiple sources of power, disconnect power from the system by unplugging all

power cables from the power supplies.

• Move products with care; ensure that all casters and/or stabilizers are firmly connected to the system. Avoid
sudden stops and uneven surfaces.

Rack Mounting of Systems

Observe the following precautions for rack stability and safety. Also refer to the rack installation documentation
accompanying the system and the rack for specific caution statements and procedures.

Systems are considered to be components in a rack. Thus, "component" refers to any system as well as to various
peripherals or supporting hardware.

CAUTION: Installing systems in a rack without the front and side stabilizers installed

could cause the rack to tip over, potentially resulting in bodily injury under certain
circumstances. Therefore, always install the stabilizers before installing components in
the rack.

After installing system/components in a rack, never pull more than one component out of
the rack on its slide assemblies at one time. The weight of more than one extended
component could cause the rack to tip over and may result in serious injury.

NOTE: Your system is safety-certified as a free-standing unit and as a component for use in a

Dell rack cabinet using the customer rack kit. The installation of your system and rack kit in
any other rack cabinet has not been approved by any safety agencies. It is your responsibility to
ensure that the final combination of system and rack complies with all applicable safety
standards and local electric code requirements. Dell disclaims all liability and warranties in
connection with such combinations.

• System rack kits are intended to be installed in a rack by trained service technicians. If you install the kit in
any other rack, be sure that the rack meets the specifications of a Dell rack.

CAUTION: Do not move racks by yourself. Due to the height and weight of the rack, a

minimum of two people should accomplish this task.

• Before working on the rack, make sure that the stabilizers are secured to the rack, extended to the floor, and
that the full weight of the rack rests on the floor. Install front and side stabilizers on a single rack or front
stabilizers for joined multiple racks before working on the rack.

Unmanaged Switches System Information Guide 7

CAUTION: Safety Instructions (continued)

• Always load the rack from the bottom up, and load the heaviest item in the rack first.

• Make sure that the rack is level and stable before extending a component from the rack.

• Use caution when pressing the component rail release latches and sliding a component into or out of a
rack; the slide rails can pinch your fingers.

• After a component is inserted into the rack, carefully extend the rail into a locking position, and then slide
the component into the rack.

• Do not overload the AC supply branch circuit that provides power to the rack. The total rack load should
not exceed 80 percent of the branch circuit rating.

• Ensure that proper airflow is provided to components in the rack.

www.dell.com | support.dell.com

• Wire the unit with copper wire only, and unless otherwise specified, use 14 American Wire Gauge (AWG)
wire, and protect it with a 7.2-ampere (A) minimum to a 20-A maximum protective device or a 25-A
maximum protective device when used with 90ºC wire.

CAUTION: A qualified electrician must perform all connections to DC power and to safety

grounds. All electrical wiring must comply with applicable local or national codes and
practices.

CAUTION: Before connecting safety ground or power cables to the connector, ensure that

the power is removed from the DC circuit. To ensure that the power is off, locate the
circuit breaker on the DC source circuit (usually at the power distribution of the battery
distribution fuse bay). Switch the circuit breaker to the off position and, if available,
install an approved safety locking device on the circuit breaker or switch.

CAUTION: When stranded wiring is required, use approved wiring termination, such as

closed-loop or spade-type with upturned lugs. These terminations should be the
appropriate size for the wires and must be double crimped, one on the conductor and one
on the insulation.

CAUTION: When installing the unit, the ground connection must always be made first and

disconnected last to prevent an energy hazard.

CAUTION: Never defeat the ground conductor or operate the equipment in the absence of

a suitably installed ground conductor. Contact the appropriate electrical inspection
authority or an electrician if you are uncertain that suitable grounding is available.

CAUTION: The system chassis must be securely grounded to the rack cabinet frame. Do

not attempt to connect power to the system until grounding cables are connected.
Completed power and safety ground wiring must be inspected by a qualified electrical
inspector. An energy hazard will exist if the safety ground cable is omitted or
disconnected.

Modems, Telecommunications, or Local Area Network Options

• Do not connect or use a modem during a lightning storm. There may be a risk of electrical shock from
lightning.

• Never connect or use a modem in a wet environment.

8 Unmanaged Switches System Information Guide

CAUTION: Safety Instructions (continued)

• Do not plug a modem or telephone cable into the network interface controller (NIC) receptacle.

• Disconnect the modem cable before opening a product enclosure, touching or installing internal
components, or touching an uninsulated modem cable or jack.

Products With Laser Devices

• Do not open any panels, operate controls, make adjustments, or perform procedures on a laser device other
than those specified in the product's documentation.

• Only trained service technicians should repair laser devices.

When Working Inside Your System

Before you remove the system covers, perform the following steps in the sequence indicated.

CAUTION: Many Dell systems can be serviced only by trained service technicians because

of high voltages and energy hazards. Do not attempt to service the system yourself,
except as explained in your system documentation. Always follow installation and service
instructions closely.

NOTICE: To help avoid possible damage to the system board, wait 5 seconds after turning off

the system before removing a component from the system board or disconnecting a peripheral
device.

1 Turn off the system and any devices.

2 Ground yourself by touching an unpainted metal surface on the chassis before touching anything inside

the system.

While you work, periodically touch an unpainted metal surface on the chassis to dissipate any static
electricity that might harm internal components.

3 Disconnect your system and devices from their power sources. To reduce the potential of personal injury or

shock, disconnect any telecommunication lines from the system.

In addition, take note of these safety guidelines when appropriate:

• When you disconnect a cable, pull on its connector or on its strain-relief loop, not on the cable itself. Some
cables have a connector with locking tabs; if you are disconnecting this type of cable, press in on the locking
tabs before disconnecting the cable. As you pull connectors apart, keep them evenly aligned to avoid
bending any connector pins. Also, before you connect a cable, make sure that both connectors are correctly
oriented and aligned.

• Handle components and cards with care. Do not touch the components or contacts on a card. Hold a card
by its edges or by its metal mounting bracket. Hold a component such as a microprocessor chip by its
edges, not by its pins.

Protecting Against Electrostatic Discharge

Static electricity can harm delicate components inside your system. To prevent static damage, discharge static
electricity from your body before you touch any of the electronic components, such as the microprocessor. You
can do so by periodically touching an unpainted metal surface on the chassis.

Unmanaged Switches System Information Guide 9

When Working Inside Your System (continued)

You can also take the following steps to prevent damage from electrostatic discharge (ESD):

• When unpacking a static-sensitive component from its shipping carton, do not remove the component
from the antistatic packing material until you are ready to install the component in your system. Just before
unwrapping the antistatic packaging, be sure to discharge static electricity from your body.

• When transporting a sensitive component, first place it in an antistatic container or packaging.

• Handle all sensitive components in a static-safe area. If possible, use antistatic floor pads and workbench
pads and an antistatic grounding strap.

www.dell.com | support.dell.com

This document contains getting started/setup, safety, regulatory, and warranty information about your Dell™
PowerConnect™ network switch.

To obtain the latest versions of the documents on your hard drive, go to the Dell Support website at
support.dell.com.

Finding Information and Assistance

Resource Contents Using the Resource

About This Guide

support.dell.com Dell Support website

• Technical support and
information

• Downloads for your system

• Order or delivery status

• Hints and tips, technology
papers, service information

premiersupport.dell.com Dell Premier Support website

• Service call status

• Top technical issues by product

• Frequently asked questions by
product number

• Customized service tags

• System configuration detail

Go to support.dell.com and complete the one-time
registration.

• Get help with general usage, installation, and
troubleshooting questions.

• Obtain answers to technical service and support questions.

• Get the latest versions of the drivers for your system.

• Access documentation about your system and devices.

• Join online discussions with other Dell customers and Dell
technical professionals.

• Explore a list of online links to Dell's primary vendors.

Go to premiersupport.dell.com:

The Dell Premier Support website is customized for
corporate, government, and education customers.

This site may not be available in all regions.

10 Unmanaged Switches System Information Guide

Getting Started/Setup

Package Contents

Before you begin installing the switch, confirm that your package contains the following items:

•Switch

• AC power cable

• Self-adhesive rubber pads for desktop installation

• Rackmount kit for rack installation

• Dell PowerConnect CD

Before You Connect to the Network: Mounting Kit Instructions

The switch is supplied with rubber feet for stationing it on a flat surface and mounting brackets and screws for
mounting it in a rack.

Installing the Switch on a Flat Surface

The switch can be installed on any appropriate level surface that can safely support the weight of the hubs and
their attached cables. There must be adequate space around the switch for ventilation and access to cable
connectors.

To install the switch on a flat surface:

1 Set the switch on the flat surface and check for proper ventilation.

Allow at least 5.1 cm (2 inches) on each side for proper ventilation and 12.7 cm (5 inches) at the back for
power cable clearance.

2 Attach rubber feet on each marked location on the bottom of the chassis.

The rubber feet are optional but are recommended to keep the unit from slipping.

Installing the Switch in a Rack

The switch can be installed in most standard 48.3-cm (19-inch) racks.

NOTE: For racks that are not prethreaded, cage nuts are provided.

To install the switch in a rack:

1 Use the supplied screws to attach a mounting bracket to each side of the switch.

2 Position the switch in the rack and align the holes in the mounting bracket with the holes in the rack.

3 Insert and tighten two screws appropriate for your rack through each of the mounting brackets.

Additional Information

For more information about installing, setting up, and using your switch, see the User’s Guide that came with your
switch.

Unmanaged Switches System Information Guide 11

Regulatory Notices

Electromagnetic Interference (EMI) is any signal or emission, radiated in free space or conducted along power or
signal leads, that endangers the functioning of a radio navigation or other safety service or seriously degrades,
obstructs, or repeatedly interrupts a licensed radio communications service. Radio communications services
include but are not limited to AM/FM commercial broadcast, television, cellular services, radar, air-traffic control,
pager, and Personal Communication Services (PCS). These licensed services, along with unintentional radiators
such as digital devices, including computer systems, contribute to the electromagnetic environment.

Electromagnetic Compatibility (EMC) is the ability of items of electronic equipment to function properly
together in the electronic environment. While this computer system has been designed and determined to be
compliant with regulatory agency limits for EMI, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause interference with radio communications services, which can be
determined by turning the equipment off and on, you are encouraged to try to correct the interference by one or

www.dell.com | support.dell.com

more of the following measures:

• Reorient the receiving antenna.

• Relocate the radio, TV, or other receiver away from the switch.

• Plug the Ethernet switch into a different power outlet so that the switch and the receiver are on different
branch circuits.

If necessary, consult a Dell Technical Support representative or an experienced radio/television technician for
additional suggestions.

Dell computer systems are designed, tested, and classified for their intended electromagnetic environment. These
electromagnetic environment classifications generally refer to the following harmonized definitions:

• Class A is typically for business or industrial environments.

• Class B is typically for residential environments.

Information Technology Equipment (ITE), including peripherals, expansion cards, printers, input/output (I/O)
devices, monitors, and so on, that are integrated into or connected to the system should match the
electromagnetic environment classification of the computer system.

A Notice About Shielded Signal Cables: Use only shielded cables for connecting peripherals to any Dell device
to reduce the possibility of interference with radio communications services. Using shielded cables ensures that
you maintain the appropriate EMC classification for the intended environment. For parallel printers, a cable is
available from Dell. If you prefer, you can order a cable from Dell on the World Wide Web at
accessories.us.dell.com/sna/category.asp?category_id=4117.

Most Dell computer systems are classified for Class B environments. However, the inclusion of certain options can
change the rating of some configurations to Class A. To determine the electromagnetic classification for your
system or device, see the following sections specific for each regulatory agency. Each section provides country­specific EMC/EMI or product safety information.

FCC Notices (U.S. Only)

Most Dell computer systems are classified by the Federal Communications Commission (FCC) as Class B digital
devices. To determine which classification applies to your computer system, examine all FCC registration labels
located on the bottom, side, or back panel of your computer, on card-mounting brackets, and on the cards
themselves. If any one of the labels carries a Class A rating, your entire system is considered to be a Class A digital
device. If all labels carry an FCC Class B rating as distinguished by either an FCC ID number or the FCC logo,
( ), your system is considered to be a Class B digital device.

12 Unmanaged Switches System Information Guide

Once you have determined your system’s FCC classification, read the appropriate FCC notice. Note that FCC
regulations provide that changes or modifications not expressly approved by Dell could void your authority to
operate this equipment.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

• This device may not cause harmful interference.

• This device must accept any interference received, including interference that may cause undesired
operation.

Class A

This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate
radio frequency energy and, if not installed and used in accordance with the manufacturer’s instruction manual,
may cause harmful interference with radio communications. Operation of this equipment in a residential area is
likely to cause harmful interference, in which case you will be required to correct the interference at your own
expense.

Class B

This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the manufacturer’s instruction manual, may cause interference with radio
communications. However, there is no guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which can be determined by turning
the equipment off and on, you are encouraged to try to correct the interference by one or more of the following
measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and the receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer or an experienced radio/television technician for help.

FCC Identification Information

The following information is provided on the device or devices covered in this document in compliance with FCC
regulations:

• Model number: PowerConnect 2016, PowerConnect 2024, PowerConnect 2124, PowerConnect 2508

• Company name:

Dell Computer Corporation
One Dell Way
Round Rock, Texas 78682 USA
512-338-4400

Unmanaged Switches System Information Guide 13

IC Notice (Canada Only)

Most Dell computer systems (and other Dell digital apparatus) are classified by the Industry Canada (IC)
Interference-Causing Equipment Standard #3 (ICES-003) as Class B digital devices. To determine which
classification (Class A or B) applies to your computer system (or other Dell digital apparatus), examine all
registration labels located on the bottom, side, or the back panel of your computer (or other digital apparatus). A
statement in the form of "IC Class A ICES-003" or "IC Class B ICES-003" will be located on one of these labels.
Note that Industry Canada regulations provide that changes or modifications not expressly approved by Dell could
void your authority to operate this equipment.

This Class B (or Class A, if so indicated on the registration label) digital apparatus meets
the requirements of the Canadian Interference-Causing Equipment Regulations.

www.dell.com | support.dell.com

Cet appareil numérique de la Classe B (ou Classe A, si ainsi indiqué sur l’étiquette
d’enregistration) respecte toutes les exigences du Reglement sur le Materiel Brouilleur du
Canada.

CE Notice (European Union)

Marking by the symbol indicates compliance of this Dell computer to the EMC Directive and the Low
Voltage Directive of the European Union. Such marking is indicative that this Dell system meets the following
technical standards:

Set 1: For standard Dell ITE with AC power supplies

• EN 55022 — "Information Technology Equipment — Radio Disturbance Characteristics — Limits and
Methods of Measurement."

• EN 55024 — "Information Technology Equipment - Immunity Characteristics - Limits and Methods of
Measurement."

• EN 61000-3-2 — "Electromagnetic Compatibility (EMC) - Part 3: Limits - Section 2: Limits for Harmonic
Current Emissions (Equipment Input Current Up to and Including 16 A Per Phase)."

• EN 61000-3-3 — "Electromagnetic Compatibility (EMC) - Part 3: Limits - Section 3: Limitation of Voltage
Fluctuations and Flicker in Low-Voltage Supply Systems for Equipment With Rated Current Up to and
Including 16 A."

• EN 60950 — "Safety of Information Technology Equipment."

For –48 volt-direct-current (VDC) powered systems, the following set of standards applies. See the "Declaration of
Conformity" to determine whether a particular system meets EN 50082-1 or EN 50082-2 requirements.

Set 2: For –48-VDC powered systems

• EN 55022 — "Information Technology Equipment — Radio Disturbance Characteristics — Limits and
Methods of Measurement."

• EN 50082-1 — "Electromagnetic Compatibility - Generic Immunity Standard - Part 1: Residential,
Commercial and Light Industry."

14 Unmanaged Switches System Information Guide

• EN 50082-2 — "Electromagnetic Compatibility - Generic Immunity Standard - Part 2: Industrial
Environment."

• EN 60950 — "Safety of Information Technology Equipment."

NOTE: EN 55022 emissions requirements provide for two classifications:

• Class A is for typical commercial areas.

• Class B is for typical domestic areas.

RF INTERFERENCE WARNING: This is a Class A product. In a domestic environment this product may
cause radio frequency (RF) interference, in which case the user may be required to take adequate measures.

A "Declaration of Conformity" in accordance with the preceding directives and standards has been made and is on
file at Dell Computer Corporation Products Europe BV, Limerick, Ireland.

Simplified Chinese Class A Warning Notice (China Only)

On Class A systems, the following warning will appear near the regulatory label:

Warning: This is a Class A product. In a domestic environment this product may cause radio interference, in
which case the user may be required to take adequate measures.

EN 55022 Compliance (Czech Republic Only)

This device belongs to Class B devices as described in EN 55022, unless it is specifically
stated that it is a Class A device on the specification label. The following applies to
devices in Class A of EN 55022 (radius of protection up to 30 meters). The user of the
device is obliged to take all steps necessary to remove sources of interference to
telecommunication or other devices.

Unmanaged Switches System Information Guide 15

VCCI Notice (Japan Only)

Most Dell computer systems are classified by the Voluntary Control Council for Interference (VCCI) as Class B
information technology equipment (ITE). However, the inclusion of certain options can change the rating of some
configurations to Class A. ITE, including peripherals, expansion cards, printers, input/output (I/O) devices,
monitors, and so on, integrated into or connected to the system should match the electromagnetic environment
classification (Class A or B) of the computer system.

To determine which classification applies to your computer system, examine the regulatory labels/markings (see
"VCCI Class A ITE Regulatory Mark" and "VCCI Class B ITE Regulatory Mark") located on the bottom, side, or
back panel of your computer. Once you have determined your system’s VCCI classification, read the appropriate
VCCI notice.

Class A ITE

www.dell.com | support.dell.com

This is a Class A product based on the standard of the Voluntary Control Council for Interference (VCCI) for
information technology equipment. If this equipment is used in a domestic environment, radio disturbance may
arise. When such trouble occurs, the user may be required to take corrective actions.

VCCI Class A ITE Regulatory Mark

If the regulatory label includes the following marking, your computer is a Class A product:

VCCI

Class B ITE

This is a Class B product based on the standard of the Voluntary Control Council for Interference (VCCI) for
information technology equipment. If this equipment is used near a radio or television receiver in a domestic
environment, it may cause radio interference. Install and use the equipment according to the instruction manual.

16 Unmanaged Switches System Information Guide

VCCI Class B ITE Regulatory Mark

If the regulatory label includes the following marking, your computer is a Class B product:

MIC Notice (Republic of Korea Only)

To determine which classification (Class A or B) applies to your computer (or other Dell digital device), examine
the Republic of Korean Ministry of Information and Communications (MIC) registration labels located on your
computer (or other Dell digital device). The MIC label may be located separately from the other regulatory
marking applied to your product. Line two of the label identifies the emissions class for the product—"(A)" for
Class A products or "(B)" for Class B products.

NOTE: MIC emissions requirements provide for two classifications:

• Class A devices are for business purposes.

• Class B devices are for nonbusiness purposes.

Class A Device

Please note that this device has been approved for business purposes with regard to electromagnetic interference. If
you find that this device is not suitable for your use, you may exchange it for a nonbusiness-purpose device.

Unmanaged Switches System Information Guide 17

MIC Class A Regulatory Label

If the regulatory label includes the following marking, your computer is a Class A product:

Class B Device

www.dell.com | support.dell.com

Please note that this device has been approved for nonbusiness purposes and may be used in any environment,
including residential areas.

MIC Class B Regulatory Label

If the regulatory label includes the following marking, your computer is a Class B product.

Polish Center for Testing and Certification Notice

The equipment should draw power from a socket with an attached protection circuit (a 3-prong socket). All
equipment that works together (computer, monitor, printer, and so on) should have the same power supply source.

The phasing conductor of the room’s electrical installation should have a reserve short-circuit protection device in
the form of a fuse with a nominal value no larger than 16 amperes (A).

To completely switch off the equipment, the power supply cable must be removed from the power supply socket,
which should be located near the equipment and easily accessible.

18 Unmanaged Switches System Information Guide

A protection mark "B" confirms that the equipment is in compliance with the protection usage requirements of
standards PN-93/T-42107 and PN-EN 55022: 1996.

PN–EN 60950:2000 i PN–EN 55022:2000.

Unmanaged Switches System Information Guide 19

www.dell.com | support.dell.com

20 Unmanaged Switches System Information Guide

BSMI Notice (Taiwan Only)

If you find a or mark on the regulatory

label on the bottom, side, or back panel of your computer, the following section is applicable:

Unmanaged Switches System Information Guide 21

www.dell.com | support.dell.com

22 Unmanaged Switches System Information Guide

NOM Information (Mexico Only)

The following information is provided on the device(s) described in this document in compliance with the
requirements of the official Mexican standards (NOM):

Exporter: Dell Computer Corporation

One Dell Way
Round Rock, TX 78682

Importer: Dell Computer de México,

S.A. de C.V.
Paseo de la Reforma 2620 - 11° Piso
Col. Lomas Altas
11950 México, D.F.

Ship to: Dell Computer de México,

S.A. de C.V. al Cuidado de Kuehne &
Nagel de México S. de R.I.
Avenida Soles No. 55
Col. Peñon de los Baños
15520 México, D.F.

Model number: PowerConnect 2016, PowerConnect 2024, PowerConnect 2124,

PowerConnect 2508

Supply voltage: 100–240 VAC

Frequency: 50–60 Hz

Input current rating:

PowerConnect 2016

PowerConnect 2024

PowerConnect 2124
and 2508

0.4 A

0.75 A

1.5 A

Limited Warranties and Return Policy

Dell-branded hardware products purchased in the U.S. or Canada come with either a 90-day, one-year, two-year,
three-year, or four-year limited warranty. To determine which warranty came with your hardware product(s), see
your packing slip or invoice. The following sections describe the limited warranties and return policy for the U.S.,
the limited warranties and return policy for Canada, and the manufacturer guarantee for Latin America and the
Caribbean.

Limited Warranty for Dell-Branded Hardware Products (U.S. Only)

What is covered by this limited warranty?

This limited warranty covers defects in materials and workmanship in your—our end-user customer's—Dell­branded hardware products, including Dell-branded peripheral products.

Unmanaged Switches System Information Guide 23

What is not covered by this limited warranty?

This limited warranty does not cover:

• Software, including the operating system and software added to the Dell-branded hardware products
through our factory-integration system, third-party software, or the reloading of software

• Non-Dell-branded and Solution Provider Direct products and accessories

• Problems that result from:

– External causes such as accident, abuse, misuse, or problems with electrical power

– Servicing not authorized by Dell

– Usage that is not in accordance with product instructions

– Failure to follow the product instructions or failure to perform preventive maintenance

– Problems caused by using accessories, parts, or components not supplied by Dell

www.dell.com | support.dell.com

• Products with missing or altered service tags or serial numbers

• Products for which we have not received payment

THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER
RIGHTS WHICH VARY FROM STATE TO STATE (OR JURISDICTION TO JURISDICTION). DELL'S
RESPONSIBILITY FOR MALFUNCITONS AND DEFECTS IN HARDWARE IS LIMITED TO REPAIR
AND REPLACEMENT AS SET FORTH IN THIS WARRANTY STATEMENT. ALL EXPRESS AND
IMPLIED WARRANTIES FOR THE PRODUCT, INCLUDING BUT NOT LIMITED TO ANY IMPLIED
WARRANTIES AND CONDITIONS OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, ARE LIMITED IN TIME TO THE TERM OF THE LIMITED WARRANTY PERIOD
REFLECTED ON YOUR PACKING SLIP OR INVOICE. NO WARRANTIES, WHETHER EXPRESS OR
IMPLIED, WILL APPLY AFTER THE LIMITED WARRANTY PERIOD HAS EXPIRED. SOME STATES
DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THIS
LIMITATION MAY NOT APPLY TO YOU.

WE DO NOT ACCEPT LIABILITY BEYOND THE REMEDIES PROVIDED FOR IN THIS LIMITED
WARRANTY OR FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, INCLUDING, WITHOUT
LIMITATION, ANY LIABILTY FOR THIRD-PARTY CLAIMS AGAINST YOU FOR DAMAGES, FOR
PRODUCTS NOT BEING AVAILABLE FOR USE, OR FOR LOST DATA OR LOST SOFTWARE. OUR
LIABILITY WILL BE NO MORE THAN THE AMOUNT YOU PAID FOR THE PRODUCT THAT IS THE
SUBJECT OF A CLAIM. THIS IS THE MAXIMUM AMOUNT FOR WHICH WE ARE RESPONSIBLE.

SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR
CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO
YOU.

How long does this limited warranty last?

This limited warranty lasts for the time period indicated on your packing slip or invoice, except that the limited
warranty on Dell-branded batteries lasts only one year and the limited warranty on the lamps for Dell-branded
projectors lasts only ninety days. The limited warranty begins on the date of the packing slip or invoice. The
warranty period is not extended if we repair or replace a warranted product or any parts. Dell may change the
availability of limited warranties, at its discretion, but any changes will not be retroactive.

24 Unmanaged Switches System Information Guide

What do I do if I need warranty service?

Before the warranty expires, please call us at the relevant number listed in the following table. Please also have your
Dell service tag number or order number available.

Individual Home Consumers: U.S. Only

Technical Support 1-800-624-9896

Customer Service 1-800-624-9897

Individual Home Consumers who purchased through
an Employee Purchase Program:

Technical Support and Customer Service 1-800-822-8965

Home and Small Business Commercial Customers:

Technical Support and Customer Service 1-800-456-3355

Medium, Large, or Global Commercial Customers,
Healthcare Customers, and Value Added Resellers
(VARs):

Technical Support and Customer Service 1-800-822-8965

Government and Education Customers:

Technical Support and Customer Service 1-800-234-1490

Dell-Branded Memory

1-888-363-5150

What will Dell do?

During the 90 days of the 90-day limited warranty and the first year of all other limited warranties: During the 90
days of the 90-day limited warranty and the first year of all other limited warranties, we will repair any Dell­branded hardware products returned to us that prove to be defective in materials or workmanship. If we are not
able to repair the product, we will replace it with a comparable product that is new or refurbished.

When you contact us, we will issue a Return Material Authorization Number for you to include with your return.
You must return the products to us in their original or equivalent packaging, prepay shipping charges, and insure
the shipment or accept the risk if the product is lost or damaged in shipment. We will return the repaired or
replacement products to you. We will pay to ship the repaired or replaced products to you if you use an address in
the United States (excluding Puerto Rico and U.S. possessions and territories). Otherwise, we will ship the product
to you freight collect.

If we determine that the product is not covered under this warranty, we will notify you and inform you of service
alternatives that are available to you on a fee basis.

NOTE: Before you ship the product(s) to us, make sure to back up the data on the hard drive(s) and
any other storage device(s) in the product(s). Remove any confidential, proprietary, or personal
information and removable media such as diskettes, CDs, or PC Cards. We are not responsible for any
of your confidential, proprietary, or personal information; lost or corrupted data; or damaged or lost
removable media.

Unmanaged Switches System Information Guide 25

During the remaining years: For the remaining period of the limited warranty, we will replace any defective part
with new or refurbished parts, if we agree that it needs to be replaced. When you contact us, we will require a valid
credit card number at the time you request a replacement part, but we will not charge you for the replacement part
as long as you return the original part to us within thirty days after we ship the replacement part to you. If we do
not receive the original part within thirty days, we will charge to your credit card the then-current standard price for
that part.

We will pay to ship the part to you if you use an address in the United States (excluding Puerto Rico and U.S.
possessions and territories). Otherwise, we will ship the part freight collect. We will also include a prepaid shipping
container with each replacement part for your use in returning the replaced part to us.

NOTE: Before you replace parts, make sure to back up the data on the hard drive(s) and any other
storage device(s) in the product(s). We are not responsible for lost or corrupted data.

What if I purchased a service contract?

www.dell.com | support.dell.com

If your service contract is with Dell, service will be provided to you under the terms of the service agreement.
Please refer to that contract for details on how to obtain service.

If you purchased through us a service contract with one of our third-party service providers, please refer to that
contract for details on how to obtain service.

How will you fix my product?

We use new and refurbished parts made by various manufacturers in performing warranty repairs and in building
replacement parts and systems. Refurbished parts and systems are parts or systems that have been returned to Dell,
some of which were never used by a customer. All parts and systems are inspected and tested for quality.
Replacement parts and systems are covered for the remaining period of the limited warranty for the product you
bought. Dell owns all parts removed from repaired products.

What do I do if I am not satisfied?

We pride ourselves on our great customer service. If you are not satisfied with the service you receive under this
limited warranty, please let us know. We have found that the best way to resolve issues regarding our limited
warranty is to work together. If, after those discussions, you are still not satisfied, we believe arbitration is the most
expeditious way to resolve your concerns. Therefore, ANY CLAIM, DISPUTE, OR CONTROVERSY

(WHETHER IN CONTRACT, TORT, OR OTHERWISE, WHETHER PREEXISTING, PRESENT, OR
FUTURE, AND INCLUDING STATUTORY, COMMON LAW, INTENTIONAL TORT, AND EQUITABLE
CLAIMS) AGAINST DELL arising from or relating to this limited warranty, its interpretation, or the breach,

termination, or validity thereof, the relationships which result from this limited warranty (including, to the full
extent permitted by applicable law, relationships with third parties), Dell's advertising, or any related purchase

SHALL BE RESOLVED EXCLUSIVELY AND FINALLY BY BINDING ARBITRATION ADMINISTERED
BY THE NATIONAL ARBITRATION FORUM (NAF) under its Code of Procedure then in effect (available via

the Internet at www.arb-forum.com/ or via telephone at 1-800-474-2371). The arbitration will be limited solely to
the dispute or controversy between you and Dell. Any award of the arbitrator(s) shall be final and binding on each
of the parties, and may be entered as a judgment in any court of competent jurisdiction. Information may be
obtained and claims may be filed with the NAF at P.O. Box 50191, Minneapolis, MN 55405. This provision applies
only to individual home consumers and consumers who purchased through an employee purchase program. It does
not apply to small, medium, large, and global commercial customers or government, education, and healthcare
customers.

26 Unmanaged Switches System Information Guide

May I transfer the limited warranty?

Limited warranties on systems may be transferred if the current owner transfers ownership of the system and
records the transfer with us. The limited warranty on Dell-branded memory may not be transferred. You may
record your transfer by going to Dell's website:

• If you are an Individual Home Consumer, go to www.dell.com/us/en/dhs/topics/sbtopic_015_ccare.htm

• If you are a Home Office, Small, Medium, Large, or Global Commercial Customer, go to
www.dell.com/us/en/biz/topics/sbtopic_ccare_nav_015_ccare.htm

• If you are a Government, Education, or Healthcare Customer, or an Individual Home Consumer who
purchased through an employee purchase program, go to

www.dell.com/us/en/pub/topics/sbtopic_015_ccare.htm

If you do not have Internet access, call your customer care representative or call 1-800-624-9897.

"Total Satisfaction" Return Policy (U.S. Only)

We value our relationship with you and want to make sure that you're satisfied with your purchases. That's why we
offer a "Total Satisfaction" return policy for most products that you—the end-user customer—purchase directly
from Dell. Under this policy, you may return to Dell products that you purchased directly from Dell for a credit or
a refund of the purchase price paid, less shipping and handling and applicable restocking fees as follows:

• New Hardware Products and Accessories — All new hardware, accessories, parts, and unopened software
still in its sealed package, excluding the products listed below, may be returned within thirty days from the
date on the packing slip or invoice. To return applications software or an operating system that has been
installed by Dell, you must return the entire computer. A different return policy applies to nondefective
products purchased through Dell's Software and Peripherals division by customers of our Small and Medium
Business divisions. Those products may be returned within thirty days from the date on the packing slip or
invoice, but a fifteen percent (15%) restocking fee will be deducted from any refund or credit. The "Total
Satisfaction" Return Policy and Software and Peripherals division return policy are not available for Dell |
EMC storage products, EMC-branded products, or enterprise software.

• Reconditioned or Refurbished Dell-Branded Hardware Products and Parts — All reconditioned or
refurbished Dell-branded server and storage products may be returned within thirty days from the date on
the packing slip or invoice. All other reconditioned or refurbished Dell-branded hardware products and parts
may be returned within fourteen days of the date on the packing slip or invoice.

To return products, e-mail or call Dell customer service to receive a Credit Return Authorization Number within
the return policy period applicable to the product you want to return. You must obtain a Credit Return
Authorization Number in order to return the product. See "Contacting Dell" or "Getting Help" in your customer
documentation (or www.dell.com/us/en/gen/contact.htm) to find the appropriate contact information for
obtaining customer assistance.

You must ship the products to Dell within five days of the date that Dell issues the Credit Return Authorization
Number. You must also return the products to Dell in their original packaging, in as-new condition along with any
media, documentation, and all other items that were included in the original shipment, prepay shipping charges,
and insure the shipment or accept the risk of loss or damage during shipment.

Unmanaged Switches System Information Guide 27

Limited Warranty Terms for Dell-Branded Hardware Products (Canada Only)

What is covered by this limited warranty?

This limited warranty covers defects in materials and workmanship in your—our end-user customer's—Dell­branded hardware products, including Dell-branded peripheral products.

What is not covered by this limited warranty?

This limited warranty does not cover:

• Software, including the operating system and software added to the Dell-branded hardware products
through our factory-integration system, or the reloading of the software

• Non-Dell branded and Solution Provider Direct products and accessories

www.dell.com | support.dell.com

• Problems that result from:

– External causes such as accident, abuse, misuse, or problems with electrical power

– Servicing not authorized by Dell

– Usage that is not in accordance with product instructions

– Failure to follow the product instructions or failure to perform preventive maintenance

– Problems caused by using accessories, parts, or components not supplied by Dell

• Products with missing or altered service tags or serial numbers

• Products for which we have not received payment

THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS
WHICH VARY FROM PROVINCE TO PROVINCE. DELL'S RESPONSIBILITY FOR MALFUNCTIONS AND
DEFECTS IN PRODUCT IS LIMITED TO REPAIR AND REPLACEMENT AS SET FORTH IN THIS
WARRANTY STATEMENT, FOR THE TERM OF THE WARRANTY PERIOD REFLECTED ON YOUR
PACKING SLIP OR INVOICE. EXCEPT FOR THE EXPRESS WARRANTIES CONTAINED IN THIS
WARRANTY STATEMENT, DELL DISCLAIMS ALL OTHER WARRANTIES AND CONDITIONS, EXPRESS
OR IMPLIED, INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES AND CONDITIONS OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, STATUTORY OR OTHERWISE.
SOME PROVINCES DO NOT ALLOW THE EXCLUSION OF CERTAIN IMPLIED WARRANTIES OR
CONDITIONS, OR LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY OR CONDITION LASTS.
THEREFORE, THE FOREGOING EXCLUSIONS AND LIMITATIONS MAY NOT APPLY TO YOU.

WE DO NOT ACCEPT LIABILITY BEYOND THE REMEDIES PROVIDED FOR IN THIS WARRANTY
STATEMENT OR FOR SPECIAL, INDIRECT, CONSEQUENTIAL, OR INCIDENTAL DAMAGES,
INCLUDING, WITHOUT LIMITATION, ANY LIABILTY FOR THIRD-PARTY CLAIMS AGAINST YOU FOR
DAMAGES, FOR PRODUCTS NOT BEING AVAILABLE FOR USE, OR FOR LOST DATA OR LOST
SOFTWARE. OUR LIABILITY WILL BE NO MORE THAN THE AMOUNT YOU PAID FOR THE PRODUCT
THAT IS THE SUBJECT OF A CLAIM. THIS IS THE MAXIMUM AMOUNT FOR WHICH WE ARE
RESPONSIBLE.

SOME PROVINCES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF SPECIAL, INDIRECT,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY
NOT APPLY TO YOU.

28 Unmanaged Switches System Information Guide

How long does this limited warranty last?

This limited warranty lasts for the time period indicated on your packing slip or invoice, except that the limited
warranty on Dell-branded batteries lasts only one year and the limited warranty on the lamps for Dell-branded
projectors lasts only ninety days. The limited warranty begins on the date of the packing slip or invoice. The
warranty period is not extended if we repair or replace a warranted product or any parts. Dell may change the terms
and availability of limited warranties, at its discretion, but any changes will not be retroactive (that is, the warranty
terms in place at the time of purchase will apply to your purchase).

What do I do if I need warranty service?

Before the warranty expires, please call us at the relevant number listed in the following table. Please also have your
Dell service tag number or order number available.

Individual Home Consumers; Home Office and Small
Business Customers:

Canada Only

Technical Support and Customer Service 1-800-847-4096

Medium, Large, and Global Commercial Customers;
Government, Education, and Healthcare Customers;
and Value Added Resellers (VARs):

Technical Support 1-800-387-5757

Customer Service 1-800-326-9463

Government or Education Customers, or Individual
Home Consumers who purchased through an
Employee Purchase Program:

Technical Support 1-800-387-5757

Customer Service 1-800-326-9463 (Extension 8221 for Individual

Consumers)

Dell-Branded Memory

1-888-363-5150

What will Dell do?

During the 90 days of the 90-day limited warranty and the first year of all other limited warranties: During the 90
days of the 90-day limited warranty and the first year of all other limited warranties, we will repair any Dell­branded hardware products returned to us that prove to be defective in materials or workmanship. If we are not
able to repair the product, we will replace it with a comparable product that is new or refurbished.

When you contact us, we will issue a Return Material Authorization Number for you to include with your return.
You must return the products to us in their original or equivalent packaging, prepay shipping charges, and insure
the shipment or accept the risk if the product is lost or damaged in shipment. We will return the repaired or
replacement products to you. We will pay to ship the repaired or replaced products to you if you use an address in
Canada. Otherwise, we will ship the product to you freight collect.

Unmanaged Switches System Information Guide 29