3Com 2800 Series User manual

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3Com Baseline Switch 2800 Family
(3CBLUG16A, 3CBLUG24A)
User Guide

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Table of Contents
1 Product Overview ....................................................................................1
Introduction............................................................................................1
Summary of Hardware Features ........................................................... 1
Physical Features.................................................................................. 4
Front Panel ....................................................................................4
Rear Panel..................................................................................... 4
Description of LEDs ..............................................................................5
Technical Specifications........................................................................ 6
Network Design..................................................................................... 7
2 Installing The Switch...............................................................................9
Package Contents ...............................................................................10
Positioning the Switch .........................................................................10
Rack Mounting ....................................................................................11
Powering On........................................................................................13
3 Problem Solving ....................................................................................14
4 Obtaining Support For Your Product ..................................................16
Register Your Product to Gain Service Benefits .................................16
Purchase Value-Added Services ........................................................16
Troubleshoot Online............................................................................ 17
Contact Us...........................................................................................17
Telephone Technical Support and Repair ..........................................17
Appendix A - Safety Information.............................................................20
Safety Information ...............................................................................20
L’information de Sécurité Importante .................................................. 22
Wichtige Sicherheitsinformationen...................................................... 24
Información de Seguridad Importante.................................................25
Importanti Informazioni di Sicurezza ................................................... 27
Ważne Informacje o Zabezpieczeniach ..............................................29

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Informações de segurança importantes..............................................31
Appendix B - Regulatory Information.....................................................34
FCC Statement............................................................................34
Information to the User ................................................................34
CE Statement (Europe) ...............................................................35
ICES Statement...........................................................................35
VCCI Statement...........................................................................36
Appendix C - Collection List of the Hazardous Substances ................37

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1 Product Overview
Introduction
The 3Com Baseline Switch 2824 and the 3Com Baseline Switch 2816
are versatile, easy-to-use, unmanaged gigabit switches. It is ideal for
users who want the high-speed performance of 10/100/1000 switching
but do not need sophisticated management functions. The Switch is
shipped ready for use, Operational straight out of the box. No
configuration is necessary. Your 3Com Baseline Switch incorporates
the latest in Green technology to yield more than 20% power savings
over the previous generation technology.
Figure 1-1 Appearance
Summary of Hardware Features
Table 1-1 Summarizes the hardware features supported by the
Switch.

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Table 1-1 Hardware Features
Feature Description
Auto-negotiation Supported on all ports.
Forwarding Modes Store and Forward.
Mac Address Table 8K
Port throughput
 2816: 32Gbps
 2824: 48Gbps
Auto MDI/MDIX Supported on all ports.
Traffic Prioritization
The Switch offers priority queuing, which
means all packets that are received are
examined to see if they have been priority
encoded. When a packet is received, the
Switch will read the priority level and
determine the appropriate channel to
forward the packet based on the priority
level. This feature can be useful, for
example, during excessive loads when
one type of traffic may require priority over
another. The Switch is configured to
comply with 802.1 p, VLAN tagged frames.
Notes:
The traffic prioritization feature supported
by the Switch is compatible with the
relevant sections of the IEEE 802.1 D
standard (incorporating IEEE 802.1 p).

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Feature Description
Ethernet Ports
The Switch has 24/16 10/100/1000 Mbps
auto-negotiating ports. Each port
automatically negotiates with the attached
device to determine the correct speed and
duplex mode of operation. Once
negotiated, the port will operate in one of
the following modes:
 10BASE-T half duplex
 10BASE-T full duplex
 100BASE-TX half duplex
 100BASE-TX full duplex
 1000BASE-T full duplex
WARNING:
RJ-45 ports. These are shielded RJ-45
data sockets. They cannot be used as
standard traditional telephone sockets, or
to connect the unit to a traditional PBX or
public telephone network. Only connect
RJ-45 data connectors, network telephony
systems, or network telephones to these
sockets. Either shielded or unshielded
data cables with shielded or unshielded
jacks can be connected to these data
sockets.
Mounting 19-inch rack or standalone mounting.
Fanless design Silent operation whether used in a rack or
desktop situation.
Green Technology
When no connection exists or a short
network cable is used, power consumption
can be reduced automatically to save
energy.

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Physical Features
Front Panel
Figure 1-2 2816
Figure 1-3 2824
Rear Panel
Figure 1-4 Rear Panel

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Description of LEDs
Table 1-2 Description of LEDs
The Switch provides LED indicators on the front panel for your
convenience to monitor the switch. Table 1-3 describes the meanings
of the LEDs.
Table 1-3 Description on the LEDs of the Switch
LED Status Description
Power
Green The unit is powered on and ready for
use.
OFF
The unit is not receiving power:
 Check that the power cord is
connected correctly.
 If the unit still does not operate,
contact your supplier.
Link/Activity
Green
The port works at the rate of 1000
Mbps; the LED flashes quickly when
the port is sending or receiving data.
Yellow
The port works at the rate of 10 or 100
Mbps; the LED flashes quickly when
the port is sending or receiving data.
Off
The link has not been established,
either nothing is connected to the port,
or there is a problem:
 Check that the attached device is
powered on.
 Check that the cable is the correct
type and is not faulty. If these
checks do not identify the cause of
the problem, it may be that the unit
or the device connected to the port
is faulty. Contact your supplier for
further advice.

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Technical Specifications
Table 1-4 contains the technical specifications of the Switch.
Table 1-4 Technical specifications of the Switch.
Specification 2816 2824
Physical
Physical
dimensions
(H×W×D)
44 mm×440
mm×173 mm
44 mm×440
mm×173 mm
Weight <1.65 kg <1.75 kg
Ethernet port 16 24
Mounting
Free standing, or 19-inch rack
mounted using the mounting kit
supplied
Electrical
Power Inlet IEC 320
AC Input
Voltage
Rating
Rated voltage range: 100-240V
AC, 50/60 Hz
Current
Rating 1Amp max
Maximum
Power
Consumption
15W 20W
Environmental
Operating
temperature 0°C to 40°C (32°F to 104°F)
Storage
temperature –40°C to +70°C (-40°F to 158°F)
Operating
humidity 5% to 95% (noncondensing)
Storage
humidity 5% to 95% (noncondensing)

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Specification 2816 2824
Related
Standards
Functional
SO 8802-3, IEEE 802.3
(Ethernet), IEEE 802.3u (Fast
Ethernet), IEEE 802.3ab (Gigabit
Ethernet), IEEE 802.3x(Flow
control on full duplex links), IEEE
802.3d(Bridging), IEEE 802.1 p
(VLAN tagging/ priority queuing)
Safety UL 60950-1, IEC60950-1, CSA
22.2 #60950-1, EN 60950-1
EMC
Emissions
EN 55022 Class A, FCC Part 15
Subpart B Class A, ICES-003
Class A, VCCI Class A, AS/NZS
CISPR 22 Class A
EMC
Immunity EN 55024
Network Design
The Switch provides high performance switched connections to 10
Mbps, 100 Mbps, and 1000 Mbps hubs, switches, servers and
workstations that need a dedicated switched link.
The following figure illustrates one possible configuration. Each port
has a shielded RJ-45 connector on the front panel. Each port is
capable of operating at 10 Mbps, 100 Mbps or 1000 Mbps. The ports
can automatically determine the speed and the duplex mode of the
connected equipment and provides a suitable switched connection. At
10 Mbps and at 100 Mbps, the ports can operate in half or full duplex
mode. At 1000 Mbps, the ports operate in full duplex mode only.

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Figure 1-5 Network Design

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2 Installing The Switch
WARNING: Safety Information. Before you install or remove
any components from the Switch or carry out any maintenance
procedures, you must read the safety information in Appendix A:
Safety Information in this guide.
AVERTISSEMENT: Consignes de sécurité. Avant d'installer
ou d'enlever tout composant de Switch ou d'entamer une procédure
de maintenance, lisez les informations relatives à la sécurité qui se
trouvent dansl'Appendice A de ce guide.
VORSICHT: Sicherheitsinformationen. Bevor Sie
Komponenten aus dem Switch entfernen oder den Switch hinzufügen
oder Instandhaltungsarbeiten verrichten, lesen Sie die
Sicherheitsanweisungen, die in Anhang A in diesem Handbuch
aufgeführt sind.
ADVERTENCIA: Información de seguridad. Antes de instalar
o extraer cualquier componente del Switch o de realizar tareas de
mantenimiento, debe leer la información de seguridad facilitada en el
Apéndice A de estaguía del usuario.
AVVERTENZA: Informazioni di sicurezza. Prima di installare
o rimuovere qualsiasi componente dal Switch o di eseguire qualsiasi
procedura di manutenzione, leggere le informazioni di sicurezza
riportate nell'Appendice A della presente guida per l'utente.

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OSTRZEŻENIE: Informacje o zabezpieczeniach. Przed
instalacjąlub usunięciem jakichkolwiek elementów z product lub
przeprowadzeniem prac konserwacyjnych należy zapoznaćsięz
informacjami o bezpieczeństwie zawartymi w Załączniku A
niniejszego podręcznika.
ADVERTÊNCIA: Informações de segurança Antes de
instalar ou remover quaisquer componentes do Switch ou de
executar quaisquer procedimentos de manutenção, leia as
informações de segurança no Appendix A: Safety Information deste
guia.
Package Contents
The switch packaging contains the following for all units:
 One product sealed in a plastic bag
 One power cord for use with the Switch
 One User Guide
 One Installation Guide(LAT-Spanish and Portuguese only)
 One warranty card
 One Rack Mounting Kit
 Four self-adhesive rubber pads
Positioning the Switch
The switch is suited for use in an internal wiring closet, a network
room, or telecommunications room, where it can be mounted in a
standard 19-inch equipment rack, or free-standing.
Ensure that the ventilation holes are not obstructed.

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When deciding where to position the switch, ensure that:
 Cabling is located away from:
1) Sources of electrical noise such as radios, transmitters and
broadband amplifiers.
2) Power lines and fluorescent lighting fixtures.
 The switch is accessible and cables can be connected easily.
 Water or moisture cannot enter the case of the switch.
 Air flow is not restricted around the switch or through the vents in
the side of the switch. 3Com recommends that you provide a
minimum of 25 mm (1 in.) clearance.
 Air temperature around the switch does not exceed 40 °C
(104 °F).
If the switch is installed in a 19-inch rack or closed assembly its local
air temperature may be greater than room ambient temperature.
 The air is as free from dust as possible.
 The switch is situated away from sources of conductive
(electrical) dust, for example laser printers.
 The unit is installed in a clean, air conditioned environment.
 The AC supply used by the switch is separate to that used by
units that generate high levels of AC noise, for example air
conditioning units.
 No more than four switch units are placed on top of one another,
if the units are free-standing.
Rack Mounting
The Switch is 1U high and will fit in most standard 19-inch racks.

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 Disconnect all cables from the switch before continuing. Remove
all self adhesive pads from the underside of the switch if they
have been fitted.
 If you use a shelf or support ensure that it will not obstruct the air
flow through the side panels of the switch.
To rack-mount the switch:
1) Place the switch the right way up on a hard flat surface, with the
front facing towards you.
2) Locate a securing bracket over the mounting holes on one side of
the front of the switch, as shown in Figure 2-1.
3) Insert the two screws and tighten with a suitable screwdriver.
Figure 2-1 Fitting a front bracket for rack-mounting

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You must use the screws supplied with the securing brackets.
Damage caused to the unit by using incorrect screws invalidates your
warranty.
4) Repeat steps 2 and 3 for the other side of the switch.
5) Insert the switch into the 19-inch rack and secure with suitable
screws. Ensure that ventilation holes are not obstructed.
6) Reconnect network cables.
Powering On
The following sections describe how to get the switch powered-up
and ready for operation.
1) Check the network connections and cables.
2) Connect the power supply cable to the appropriate power socket
located on the rear panel of the unit.
3) Connect the plug to the power supply outlet socket and switch on
the power supply at the socket.

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3 Problem Solving
At regular intervals you should visually check the Switch. Regular
checks can give you an early warning of a possible failure; any
problems can then be attended to when there will be least effect on
users.
Check that all external cabling connections are secure and that no
cables are pulled taut.
Refer to the information about LEDs given earlier in this guide to see if
the problem can be identified and solved. Here are some common
problems that can occur:
Activity Status LED not lit for a port that has a connection
There is a problem with this connection. Check that:
1) The device being connected to is powered on and operating
correctly.
2) The cable is connected at both ends.
3) You are using a Twisted Pair cable that is not damaged.
4) If the connection is to a workstation, that the workstation’s network
interface card is installed and configured correctly.
All Activity LEDs appear to be lit continually
There may be broadcast storms on the network. Remove port
connections one at a time, waiting a few seconds between each port.
If the LEDs go off after removing a port connection, the device that
was connected to that port is introducing an excessive amount of
broadcast frames to the network (some pieces of network equipment
operate by sending out broadcast frames regularly).

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If the problem persists and the unit still does not operate successfully,
contact your supplier with the following information before returning
the unit:
1) Product number and serial number (printed on a label supplied
with the unit).
2) A brief description of the fault condition.

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4 Obtaining Support For Your Product
Register Your Product to Gain Service Benefits
Warranty and other service benefits start from the date of purchase,
so it is important to register your product quickly to ensure you get full
use of the warranty and other service benefits available to you.
Warranty and other service benefits are enabled through product
registration. Register your product at http://eSupport.3com.com/.
3Com eSupport services are based on accounts that you create or
have authorization to access. First time users must apply for a user
name and password that provides access to a number of eSupport
features including Product Registration, Repair Services, and Service
Request. If you have trouble registering your product, please contact
3Com Global Services for assistance.
Purchase Value-Added Services
To enhance response times or extend warranty benefits, contact
3Com or your authorized 3Com reseller. Value-added services can
include 24x7 telephone technical support, software upgrades, onsite
assistance or advance hardware replacement. Experienced
engineers are available to manage your installation with minimal
disruption to your network. Expert assessment and implementation
services are offered to fill resource gaps and ensure the success of
your networking projects. More information on 3Com Extended
Warranty and Professional Services is available at http: //www.
3com.com/.
Contact your authorized 3Com reseller or 3Com for additional product
and support information.

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Troubleshoot Online
You will find support tools posted on the 3Com web site at
http://www.3com.com/.
3Com Knowledgebase helps you troubleshoot 3Com products. This
query-based interactive tool is located at
http://knowledgebase.3com.com and contains thousands of
technical solutions written by 3Com support engineers.
Contact Us
3Com offers telephone, e-mail and internet access to technical
support and repair services. To access these services for your region,
use the appropriate telephone number, URL or e-mail address.
Find a current directory of contact information posted on the 3Com
web site at http://csoweb4.3com.com/contactus/.
Telephone Technical Support and Repair
To enable telephone support and other service benefits, you must first
register your product at http://eSupport.3com.com/.
Warranty and other service benefits start from the date of purchase,
so it is important to register your product quickly to ensure you get full
use of the warranty and other service benefits available to you.
When you contact 3Com for assistance, please have the following
information ready:
 Product model name, part number, and serial number
 Proof of purchase, if you have not pre-registered your product
 A list of system hardware and software, including revision level
 Diagnostic error messages
 Details about recent configuration changes, if applicable
To send a product directly to 3Com for repair, you must first obtain a
return authorization number (RMA). Products sent to 3Com, without