EMERSONEnterasys® A4 Fast Ethernet Switch

Safety Information

Class 1 Laser Transceivers

The single mode interface modules use Class 1 laser transceivers. 

Read the following safety information before installing or operating these modules.

The Class 1 laser transceivers use an optical feedback loop to maintain Class 1 operation limits. This control loop eliminates the

need for maintenance checks or adjustments. The output is factory set, and does not allow any user adjustment. Class 1 Laser

transceivers comply with the following safety standards:

• 21 CFR 1040.10 and 1040.11 U.S. Department of Health and Human Services (FDA).

• IEC Publication 825 (International Electrotechnical Commission).

• CENELEC EN 60825 (European Committee for Electrotechnical Standardization).

When operating within their performance limitations, laser transceiver output meets the Class 1 accessible emission limit of all

three standards. Class 1 levels of laser radiation are not considered hazardous.

When the connector is in place, all laser radiation remains within the fiber. The maximum amount of radiant power exiting the

fiber (under normal conditions) is ‐12.6 dBm or 55 x 10‐6 watts.

Removing the optical connector from the transceiver allows laser radiation to emit directly from the optical port. The maximum

radiance from the optical port (under worst case conditions) is 0.8 W cm‐2 or 8 x 103 W m2 sr‐1.

Do not use optical instruments to view the laser output. The use of optical instruments to view laser output increases eye

hazard. When viewing the output optical port, power must be removed from the network adapter.

Safety Compliance

Warning: Fiber Optic Port Safety

Avertissment: Ports pour fibres optiques - sécurité sur le plan optique

Warnhinweis: Faseroptikanschlüsse - Optische Sicherheit

When using a fiber optic media expansion module, never look at the transmit laser

while it is powered on. Also, never look directly at the fiber TX port and fiber cable

ends when they are powered on.

Ne regardez jamais le laser tant qu’il est sous tension. Ne regardez jamais

directement le port TX (Tramsmission) à fibres optiques et les embouts de câbles à

fibres optiques tant qu’ils sont sous tension.

Niemals ein Übertragungslaser betrachten, während dieses eingeschaltet ist.

Niemals direkt auf den Faser‐TX‐Anschluß und auf die Faserkabelenden schauen,

während diese eingeschaltet sind.

Declaration of Conformity

Application of Council Directive(s): 2004/108/EC

2006/95/EC

Manufacturer’s Name: Enterasys Networks, Inc.

Manufacturer’s Address: 50 Minuteman Road

Andover, MA 01810

USA

European Representative Name: Enterasys Networks, Ltd.

European Representative Address: Nexus House, Newbury Business Park

London Road, Newbury

Berkshire RG14 2PZ, England

Conformance to Directive(s)/Product Standards: EC Directive 2004/108/EC

EN55022:2006

EN 55024:1998

A1:2001

A2:2003

EN 61000‐3‐2:2006

EN 61000‐3‐3:1995

A1:2001

A2:2005

EC Directive 2006/95/EC

EN 60950‐1:2006

A11:2009

A1:2010

EN 60825‐1:2007

EN 60825‐2:2004

A1:2007

Equipment Type/Environment: Information Technology Equipment, for use in a Commercial

or Light Industrial Environment.

Enterasys Networks, Inc. declares that the equipment packaged with this notice conforms to the above directives.

Enterasys Networks, Inc. Firmware License Agreement

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This guide provides an overview, installation and troubleshooting instructions, and specifications

for the Enterasys® A4 Fast Ethernet switches.

For information about the Command Line Interface (CLI) set of commands used to configure and

manage the A4 switches, refer to the Enterasys A4 CLI Reference.

This preface provides an overview of this guide and the A4 manual set, and explains the symbols

used throughout this guide.

Who Should Use This Guide

This guide is intended for a network administrator responsible for installing and setting up the

stackable switches.

How to Use This Guide

Read through this guide completely to familiarize yourself with its contents and gain an

understanding of the features and capabilities of the stackable Ethernet switch. A general

knowledge of data communications networks is helpful when setting up the switch.

This guide provides information about the following:

Related Documents

The following manuals can be obtained from the World Wide Web in Adobe Acrobat Portable

Document Format (PDF) at the following site:

https://extranet.enterasys.com/downloads/

• Enterasys A4 CLI Reference describes how to use the Command Line Interface (CLI) to set up

and manage the switches.

Electrical Hazard: Only qualified personnel should perform installation procedures.

Riesgo Electrico: Solamente personal calificado debe realizar procedimientos de instalacion.

Elektrischer Gefahrenhinweis: Installationen sollten nur durch ausgebildetes und qualifiziertes 

Personal vorgenommen werden.

Elektrischer Gefahrenhinweis: Installationen sollten nur durch ausgebildetes und qualifiziertes Personal 

vorgenommen werden.

Regulatory Compliance Information

Federal Communications Commission (FCC) Notice

This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not

cause harmful interference, and (2) this device must accept any interference received, including interference that may cause

undesired operation.

NOTE: 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 uses, generates, and can radiate radio frequency energy and if not

installed in accordance with the operator’s manual, may cause harmful interference to radio communications. Operation of this

equipment in a residential area is likely to cause interference in which case the user will be required to correct the interference

at his own expense.

WARNING: Changes or modifications made to this device which are not expressly approved by the party responsible for

compliance could void the user’s authority to operate the equipment.

Industry Canada Notice

This digital apparatus does not exceed the class A limits for radio noise emissions from digital apparatus set out in the Radio

Interference Regulations of the Canadian Department of Communications.

Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils

numériques de la class A prescrites dans le Règlement sur le brouillage radioélectrique édicté par le ministère des

Communications du Canada.

Class A ITE Notice

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.

Clase A. Aviso de ITE

ADVERTENCIA: Este es un producto de Clase A. En un ambiente doméstico este producto puede causar interferencia de radio

en cuyo caso puede ser requerido tomar medidas adecuadas.

Klasse A ITE Anmerkung 

WARNHINWEIS: Dieses Produkt zählt zur Klasse A ( Industriebereich ). In Wohnbereichen kann es hierdurch zu

Funkstörungen kommen, daher sollten angemessene Vorkehrungen zum Schutz getroffen werden.

VCCI Notice

This is a class A product based on the standard of the Voluntary Control Council for Interference by Information Technology

Equipment (VCCI). 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

BSMI EMC Statement — Taiwan

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.

European Waste Electrical and Electronic Equipment (WEEE) Notice

In accordance with Directive 2002/96/EC of the European Parliament on waste electrical and electronic equipment (WEEE):

1. The symbol above indicates that separate collection of electrical and electronic equipment is required and that this product

was placed on the European market after August 13, 2005, the date of enforcement for Directive 2002/96/EC.

2. When this product has reached the end of its serviceable life, it cannot be disposed of as unsorted municipal waste.  It must

be collected and treated separately.

3. It has been determined by the European Parliament that there are potential negative effects on the environment and human

health as a result of the presence of hazardous substances in electrical and electronic equipment.

4. It is the users’ responsibility to utilize the available collection system to ensure WEEE is properly treated.

For information about the available collection system, please go to www.enterasys.com/support/ or contact Enterasys

Customer Support at 353 61 705586 (Ireland).

Battery Notice

This product contains a battery used to maintain product information.  If the battery should need replacement it must be

replaced by Service Personnel.  Please contact Technical Support for assistance.  

Caution: There is an explosion risk if you replace the battery with the incorrect type. Dispose of expended battery in 

accordance with local disposal regulations.

Precaución: Hay riesgo de explosion si la bateria se reemplaza con el typo incorrecto. Deshágase de las baterías 

gastadas de conformidad con las regulaciones de eliminación local.

Supplement to Product Instructions

Enterasys Feature Guides describe how to configure some of the most important features of the

switch firmware.

Conventions Used in This Guide 

The following conventions are used in this guide:

Power Supply Replacement Part Numbers

The power supplies that can be used by the stackable switches are being transitioned to new part

numbers. The following table lists the old part numbers and their direct replacement part

numbers.

Note: Calls the reader’s attention to any item of information that may be of special importance.

Caution: Contains information essential to avoid damage to the equipment.

Precaución: Contiene información esencial para prevenir dañar el equipo.

Achtung: Verweißt auf wichtige Informationen zum Schutz gegen Beschädigungen.

Electrical Hazard: Warns against an action that could result in personal injury or death due to an 

electrical hazard.

Riesgo Electrico: Advierte contra una acción que pudiera resultar en lesión corporal o la muerte 

debido a un riesgo eléctrico.

Elektrischer Gefahrenhinweis: Warnung vor sämtlichen Handlungen, die zu Verletzung von 

Personen oder Todesfällen – hervorgerufen durch elektrische Spannung – führen können! 

Warning: Warns against an action that could result in personal injury or death.

Advertencia: Advierte contra una acción que pudiera resultar en lesión corporal o la muerte.

Warnhinweis: Warnung vor Handlungen, die zu Verletzung von Personen oder gar Todesfällen 

führen können!

This chapter introduces the Enterasys A4 Fast Ethernet stackable switches

For information about... Refer to page...

Overview 1-1

Features 1-3

Overview

The A4 Fast Ethernet switches are store and forward stackable switches that can be adapted and

scaled to help meet your network requirements. These stackable switches provide a management

platform and an uplink to a network backbone for a stacked group of up to eight A4 switches.

You can also use a redundant power supply with these switches to help prevent downtime due to

an internal power supply failure in the switch or AC power source.

You can install the stackable switch on a flat surface or into a standard 19‐inch rack, and configure

the stackable switch functions using the WebView™ application, CLI switching commands, and/

or SNMP.

The A4 stackable switch can connect to Ethernet networks or workstations through RJ45

connectors, SFP ports, or Gigabit Ethernet ports, depending on your model’s configuration. The

SFP ports support optional pluggable transceivers, which are hot swappable. The 1000Base‐T

built‐in RJ45 stacking ports on the A4 switches can be configured as standard 10/100/1000Base‐T

switch ports when the unit is in standalone mode (not stacked).

For pluggable transceiver compatibility and specifications, refer to the datasheet at

http://www.enterasys.com/products/transceivers‐ds.pdf.

Table 1‐1 lists the number of ports and port types for the A4 switches

Features

Stack Connections

The switches have front panel RJ45 ports for connections in a stack configuration. The stacking

cables used for the connections must be standard Category 5 or better UTP cable.

Redundant Power Supply Capability

The A4 has power supply redundancy capability when connected to an optional external

redundant power supply:

• STK‐RPS‐150PS, a 150 watt DC power supply for redundant power for A4 switches.

If the internal power supply fails, the RPS automatically assumes the role of the internal power

supply without interrupting network traffic. The internal power supply and RPS each have their

own AC power connection, which enables the connection of each power supply to a different AC

power circuit for additional AC power source redundancy.

Management

Management of the switch can be either in‐band or out‐of‐band. In‐band remote management is

possible using Telnet, Enterasys Networks’ NetSight® management application, or the WebView

application. Out‐of‐band management is provided through the DB9 Console port connector on the

front panel using a VT100 terminal or a VT100 terminal emulator.

Switch Configuration Using WebView

Enterasys Networks’ HTTP‐based Web management application (WebView) is an intuitive web

tool for simple management tasks.

Switch Configuration Using CLI Commands

The CLI commands enable you to perform more complete stackable switch configuration

management tasks.

For CLI command set information and how to configure the module, refer to the Enterasys A4 CLI

Reference.

Standards Compatibility

The 100BASE‐T ports are compliant with the following standards and operations:

• IEEE 802.3

• IEEE 802.3u

• IEEE 802.3ab (Stack Ports)

• IEEE 802.3ad

• Full‐Duplex operation

In addition to the 100BASE‐T standards, the SFP ports are compliant with the following standards

and operations:

• IEEE 802.3z

• IEEE 802.3x Flow Control support for Full‐Duplex mode

Electrical Hazard: Only qualified personnel should perform installation procedures.

Riesgo Electrico: Solamente personal calificado debe realizar procedimientos de instalacion.

Elektrischer Gefahrenhinweis: Installationen sollten nur durch ausgebildetes und qualifiziertes 

Personal vorgenommen werden.

Important Notice

Read the Release Notes for the latest A4 firmware release for your A4 switch to check for any exceptions to 

the supported features and operation documented in this guide