Cisco 4948E-F, 4948E User Manual

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Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

January 2011

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Fax: 408 527-0883

Text Part Number: OL-21561-02

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THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET FORTH IN THE INFORMATION PACKET THAT SHIPPED WITH THE PRODUCT AND ARE INCORPORATED HEREIN BY THIS REFERENCE. IF YOU ARE UNABLE TO LOCATE THE SOFTWARE LICENSE OR LIMITED WARRANTY, CONTACT YOUR CISCO REPRESENTATIVE FOR A COPY.

The following information is for FCC compliance of Class A devices: 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 instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case users will be required to correct the interference at their own expense.

The following information is for FCC compliance of Class B devices: The equipment described in this manual generates and may radiate radio-frequency energy. If it is not installed in accordance with Cisco’s installation instructions, it may cause interference with radio and television reception. This equipment has been tested and found to comply with the limits for a Class B digital device in accordance with the specifications in part 15 of the FCC rules. These specifications are designed to provide reasonable protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular installation.

Modifying the equipment without Cisco’s written authorization may result in the equipment no longer complying with FCC requirements for Class A or Class B digital devices. In that event, your right to use the equipment may be limited by FCC regulations, and you may be required to correct any interference to radio or television communications at your own expense.

You can determine whether your equipment is causing interference by turning it off. If the interference stops, it was probably caused by the Cisco equipment or one of its peripheral devices. If the equipment causes interference to radio or television reception, try to correct the interference by using one or more of the following measures:

• Turn the television or radio antenna until the interference stops.

• Move the equipment to one side or the other of the television or radio.

• Move the equipment farther away from the television or radio.

• Plug the equipment into an outlet that is on a different circuit from the television or radio. (That is, make certain the equipment and the television or radio are on circuits controlled by different circuit breakers or fuses.)

Modifications to this product not authorized by Cisco Systems, Inc. could void the FCC approval and negate your authority to operate the product.

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relationship between Cisco and any other company. (1005R)

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

IMPLIED, INCLUDING, WITHOUT

CONTENTS

Preface ix

Audience i-ix

Organization i-ix

Preface

This preface describes the audience, organization, and conventions of the Catalyst 4948E and Catalyst

documentation.

Audience

Only trained and qualified service personnel (as defined in IEC60950-1 and AZ/NZS 60950-1) should install, replace, or service the equipment.

Organization

This guide is organized as follows:

Chapter Title Description

Chapter 1 Product Overview Describes the hardware features, specifications, and

Chapter 2 Preparing for

Chapter 3 Installing the Switch Describes how to rack-mount the Catalyst 4948E and the

Chapter 4 Removal and

Appendix A Power Supply

Appendix B Transceiver, Chassis

4948E-F Switch Installation Guide and provides information on how to obtain related

Installation

Replacement Procedures

Specifications

Connectors, and Cable and Adapter Specifications

functionality of the Catalyst Catalyst

Describes how to prepare your site for the installation of the Catalyst

Catalyst

Describes how to remove and install the field replaceable units on the Catalyst switches.

Lists the switch system specifications.

Describes the SFP and SFP+ transceivers, the chassis connectors, and the cables and adapters supplied with the Catalyst

4948E-F switches.

4948E and Catalyst 4948E-F switches.

4948E-F switches and attach the cables.

4948E and Catalyst 4948E-F

4948E and Catalyst 4948E-F switches.

4948E and

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Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

Command Syntax Conventions

Table 1 describes the syntax used with the commands in this document.

Ta b l e 1 Command Syntax Guide

Convention Description

boldface Commands and keywords.

italic Command input that is supplied by you.

[ ] Keywords or arguments that appear within square

brackets are optional.

{ x | x | x } A choice of keywords (represented by x) appears in

braces separated by vertical bars. You must select one.

^ or Ctrl Represent the key labeled Control. For example, when

you read ^D or Ctrl-D, you should hold down the Control key while you press the D key.

screen font

boldface screen font Information you must enter is in boldface screen

Terminal sessions and information the system displays are in

screen font.

font.

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

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Preface

Command Syntax Conventions

Table 1 Command Syntax Guide

Convention Description

< > Nonprinting characters, such as passwords, appear in

angled brackets.

[ ] Default responses to system prompts appear in square

brackets.

Note Means reader take note.

Tip Means the following information will help you solve a problem.

Caution Means reader be careful. In this situation, you might perform an action that could result in equipment

damage or loss of data.

Warning

Means reader be warned. In this situation, you might perform an action that could result in bodily injury.

Statement 1071—Warning Definition

Warning

Waarschuwing

IMPORTANT SAFETY INSTRUCTIONS

This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. Use the statement number provided at the end of each warning to locate its translation in the translated safety warnings that accompanied this device.

SAVE THESE INSTRUCTIONS

BELANGRIJKE VEILIGHEIDSINSTRUCTIES

Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk letsel kan veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich bewust te zijn van de bij elektrische schakelingen betrokken risico's en dient u op de hoogte te zijn van de standaard praktijken om ongelukken te voorkomen. Gebruik het nummer van de verklaring onderaan de waarschuwing als u een vertaling van de waarschuwing die bij het apparaat wordt geleverd, wilt raadplegen.

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BEWAAR DEZE INSTRUCTIES

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

Command Syntax Conventions

Preface

Varoitus

Attention

Warnung

TÄRKEITÄ TURVALLISUUSOHJEITA

Tämä varoitusmerkki merkitsee vaaraa. Tilanne voi aiheuttaa ruumiillisia vammoja. Ennen kuin käsittelet laitteistoa, huomioi sähköpiirien käsittelemiseen liittyvät riskit ja tutustu onnettomuuksien yleisiin ehkäisytapoihin. Turvallisuusvaroitusten käännökset löytyvät laitteen mukana toimitettujen käännettyjen turvallisuusvaroitusten joukosta varoitusten lopussa näkyvien lausuntonumeroiden avulla.

SÄILYTÄ NÄMÄ OHJEET

IMPORTANTES INFORMATIONS DE SÉCURITÉ

Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant entraîner des blessures ou des dommages corporels. Avant de travailler sur un équipement, soyez conscient des dangers liés aux circuits électriques et familiarisez-vous avec les procédures couramment utilisées pour éviter les accidents. Pour prendre connaissance des traductions des avertissements figurant dans les consignes de sécurité traduites qui accompagnent cet appareil, référez-vous au numéro de l'instruction situé à la fin de chaque avertissement.

CONSERVEZ CES INFORMATIONS

WICHTIGE SICHERHEITSHINWEISE

Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu Verletzungen führen kann. Machen Sie sich vor der Arbeit mit Geräten mit den Gefahren elektrischer Schaltungen und den üblichen Verfahren zur Vorbeugung vor Unfällen vertraut. Suchen Sie mit der am Ende jeder Warnung angegebenen Anweisungsnummer nach der jeweiligen Übersetzung in den übersetzten Sicherheitshinweisen, die zusammen mit diesem Gerät ausgeliefert wurden.

Avvertenza

Advarsel

BEWAHREN SIE DIESE HINWEISE GUT AUF.

IMPORTANTI ISTRUZIONI SULLA SICUREZZA

Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare infortuni alle persone. Prima di intervenire su qualsiasi apparecchiatura, occorre essere al corrente dei pericoli relativi ai circuiti elettrici e conoscere le procedure standard per la prevenzione di incidenti. Utilizzare il numero di istruzione presente alla fine di ciascuna avvertenza per individuare le traduzioni delle avvertenze riportate in questo documento.

CONSERVARE QUESTE ISTRUZIONI

VIKTIGE SIKKERHETSINSTRUKSJONER

Dette advarselssymbolet betyr fare. Du er i en situasjon som kan føre til skade på person. Før du begynner å arbeide med noe av utstyret, må du være oppmerksom på farene forbundet med elektriske kretser, og kjenne til standardprosedyrer for å forhindre ulykker. Bruk nummeret i slutten av hver advarsel for å finne oversettelsen i de oversatte sikkerhetsadvarslene som fulgte med denne enheten.

TA VARE PÅ DISSE INSTRUKSJONENE

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Preface

Command Syntax Conventions

Aviso

¡Advertencia!

Varning!

INSTRUÇÕES IMPORTANTES DE SEGURANÇA

Este símbolo de aviso significa perigo. Você está em uma situação que poderá ser causadora de lesões corporais. Antes de iniciar a utilização de qualquer equipamento, tenha conhecimento dos perigos envolvidos no manuseio de circuitos elétricos e familiarize-se com as práticas habituais de prevenção de acidentes. Utilize o número da instrução fornecido ao final de cada aviso para localizar sua tradução nos avisos de segurança traduzidos que acompanham este dispositivo.

GUARDE ESTAS INSTRUÇÕES

INSTRUCCIONES IMPORTANTES DE SEGURIDAD

Este símbolo de aviso indica peligro. Existe riesgo para su integridad física. Antes de manipular cualquier equipo, considere los riesgos de la corriente eléctrica y familiarícese con los procedimientos estándar de prevención de accidentes. Al final de cada advertencia encontrará el número que le ayudará a encontrar el texto traducido en el apartado de traducciones que acompaña a este dispositivo.

GUARDE ESTAS INSTRUCCIONES

VIKTIGA SÄKERHETSANVISNINGAR

Denna varningssignal signalerar fara. Du befinner dig i en situation som kan leda till personskada. Innan du utför arbete på någon utrustning måste du vara medveten om farorna med elkretsar och känna till vanliga förfaranden för att förebygga olyckor. Använd det nummer som finns i slutet av varje varning för att hitta dess översättning i de översatta säkerhetsvarningar som medföljer denna anordning.

SPARA DESSA ANVISNINGAR

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Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

xiii

Command Syntax Conventions

Preface

Aviso

Advarsel

INSTRUÇÕES IMPORTANTES DE SEGURANÇA

Este símbolo de aviso significa perigo. Você se encontra em uma situação em que há risco de lesões corporais. Antes de trabalhar com qualquer equipamento, esteja ciente dos riscos que envolvem os circuitos elétricos e familiarize-se com as práticas padrão de prevenção de acidentes. Use o número da declaração fornecido ao final de cada aviso para localizar sua tradução nos avisos de segurança traduzidos que acompanham o dispositivo.

GUARDE ESTAS INSTRUÇÕES

VIGTIGE SIKKERHEDSANVISNINGER

Dette advarselssymbol betyder fare. Du befinder dig i en situation med risiko for legemesbeskadigelse. Før du begynder arbejde på udstyr, skal du være opmærksom på de involverede risici, der er ved elektriske kredsløb, og du skal sætte dig ind i standardprocedurer til undgåelse af ulykker. Brug erklæringsnummeret efter hver advarsel for at finde oversættelsen i de oversatte advarsler, der fulgte med denne enhed.

GEM DISSE ANVISNINGER

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Preface

Command Syntax Conventions

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Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

Obtaining Documentation and Submitting a Service Request

Preface

Obtaining Documentation and Submitting a Service Request

For information on obtaining documentation, submitting a service request, and gathering additional

xvi

information, see the monthly What’s revised Cisco

http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html

Subscribe to the What’s New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS version 2.0.

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

technical documentation, at:

New in Cisco Product Documentation, which also lists all new and

OL-21561-02

CHAP T ER

Product Overview

Revised: January 4, 2012

Both the Catalyst 4948E switch and the Catalyst 4948E-F switch are 1-RU, horizontal, fixed-configuration chassis with 48 10/100/1000 downlink ports and 4 1-GB or 10-GB uplink ports. Both switches have one removable fan tray and support redundant power supplies. The primary difference between the two chassis is that the air flow in the Catalyst the rear of the chassis while the air flow in the Catalyst 4948E-F goes from the rear of the chassis to the front of the chassis. and Figure 1-2 shows the rear view of both chassis with the major features identified.

Note The fan trays and the power supplies are not interchangeable between the Catalyst 4948E and the

Catalyst 4948E-F switch chassis.

Figure 1-1 shows the front view of both chassis with the major features identified

4948E goes from the front of the chassis to

Tip For additional information about the Cisco Catalyst 4948E and the Catalyst 4948E-F switches (including

configuration examples and troubleshooting information), see the documents listed on this page:

http://www.cisco.com/en/US/products/ps6021/tsd_products_support_series_home.html

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Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

1-1

Chapter 1 Product Overview

278083

Figure 1-1 Catalyst 4948E and Catalyst 4948E-F Switches—Front View of Chassis

(Catalyst 4948E Switch Shown)

1 48 downlink ports 4 Status LEDs 2 4 uplink ports 5 Console port 3 Management port

Note The orientation of the Cisco logo shown in Figure 1-1 identifies the chassis as a Catalyst 4948E switch.

The Cisco logo that appears on the Catalyst labels are placed on the Catalyst

4948E-F top cover to denote the direction of the airflow through the

4948E-F chassis top cover is rotated 180 degrees. Additional

chassis.

1-2

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Chapter 1 Product Overview

Figure 1-2 Catalyst 4948E and Catalyst 4948E-F Switches—Rear View of Chassis

1 Power supply 1 (primary) 3 Power supply 2 (redundant) 2 Fan tray

Features

PWR - 540 AC

100 - 240 VAC

7 - 3A

50 - 60 Hz

INPUT

OUTPUT

INPUT

PWR - 540 AC

100 - 240 VAC

50 - 60 Hz

7 - 3A

OUTPUT

330680

Features

This chapter describes the Catalyst 4948E and Catalyst 4948E-F switches and includes these sections:

• Features, page 1-3

• Physical and Environmental Specifications, page 1-7

• Fan Tray, page 1-8

• Front Panel LEDs, page 1-11

Table 1-1 lists the features of the Catalyst 4948E and the Catalyst 4948E-F switch chassis.

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1-3

Features

Ta b l e 1-1 Catalyst 4948E and Catalyst 4948E-F Switch Features

Feature Description

Chassis (both chassis)

Uplink ports (both chassis)

1-RU, 48 10/100/1000 ports plus 4 1-GB/10-GB ports, fixed configuration switch with redundant power supplies

The chassis has 4 1-GB or 10-GB uplink ports. An SFP or SFP+ transceiver must be installed in the chassis port socket for the port to operate. Cable type and recommended cabling distance for each port is determined by the type of SFP or SFP+ transceiver installed in the uplink port. A bicolor port link status LED is associated with each uplink port. LED colors indicate the following status:

• Green—The link is established and operational.

• Amber—The port is disabled.

• Blinking amber—The system has detected a fault with the link.

• Off—No link is established or the transceiver is not installed in the port

socket.

Chapter 1 Product Overview

Downlink ports (both chassis)

Console port (both chassis)

Ethernet management port (both chassis)

See Appendix B, “Transceiver, Chassis Connectors, and Cable and Adapter

Specifications” for supported SFP and SFP+ transceiver descriptions,

specifications, and cabling distances.

• The chassis has 48 10/100/1000BASE autonegotiating-capable

downlink ports. Each port has an RJ-45 connector. A bicolor port link status LED is associated with each port. LED colors indicate the following status:

• Green—The link is established and operational.

• Amber—The port is disabled.

• Blinking amber—The system has detected a fault with the link.

• Off—No link is established or no network interface cable is installed.

A console serial port (RJ-45) is provided for switch management using standard console equipment. Additional information including a connector pinout table is provided in

Appendix B, “Transceiver, Chassis Connectors,

and Cable and Adapter Specifications”for the console port.

Note A console cable is not provided in the accessory kit. It can be ordered

as an option.

• The Catalyst 4948E switch provides a 10/100/1000 RJ-45 port Ethernet

Management port that can be used to manage the switch through an Ethernet network. This port can also be used to download software to the switch or transfer files to remote servers for analysis or backup storage.

• The typical connection to the Management Ethernet port uses an

Ethernet cable with RJ-45 connectors at each end. The other end of the cable typically connects to an Ethernet switch, hub, or router that provides connectivity between the multishelf system and networks from which system management is desired.

Appendix B, “Transceiver, Chassis Connectors, and Cable and Adapter Specifications” contains

additional information for the Ethernet management port including a connector pinout table.

1-4

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Chapter 1 Product Overview

Table 1-1 Catalyst 4948E and Catalyst 4948E-F Switch Features (continued)

Feature Description

RESET switch (both chassis)

• Resets and restarts the switch.

• The switch is recessed on chassis front panel and requires a pointed

object to access it.

Fan tray

Catalyst 4948E chassis

• The Catalyst 4948E chassis supports one hot-swappable fan tray (part

number WS-X4993=).

Note The fan trays are not interchangeable between the Catalyst 4948E

and the Catalyst

• The fan tray has four variable-speed 12 VDC fans.

• The fan tray installs in the rear of the chassis between the two power

4948E-F chassis.

supplies.

• The fan tray for the Catalyst 4948E (WS-X4993=) is color-coded dark

grey.

• A redundant pair of thermal sensors are positioned near the air inlet

(front of the chassis) to monitor the ambient air temperature and control the fan tray fan speed.

• The airflow in the Catalyst 4948E chassis is from front to back.

• The chassis has a FAN LED (located on the chassis front panel) that

provides fan tray status.

Features

–

Red—One or more individual fans in the fan tray have failed.

–

Green—All fans in the fan tray are operating normally.

Catalyst 4948E-F chassis • The Catalyst 4948E-F chassis supports one hot-swappable fan tray (part

number WS-X4993-F=).

Note The fan trays are not interchangeable between the Catalyst 4948E

and the Catalyst

• The fan tray has four variable-speed 12 VDC fans.

• The fan tray installs in the rear of the chassis between the two power

4948E-F chassis.

supplies.

• The fan tray for the Catalyst 4948E-F is color-coded blue.

• A redundant pair of thermal sensors are positioned near the air inlet (rear

of the chassis) to monitor the ambient air temperature and control the fan tray fan speed.

• The airflow in the Catalyst 4948E-F chassis is from back to front.

• The chassis has a FAN LED (located on the chassis front panel) that

provides fan tray status.

–

Red—One or more individual fans in the fan tray have failed.

–

Green—All fans in the fan tray are operating normally.

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1-5

Features

Table 1-1 Catalyst 4948E and Catalyst 4948E-F Switch Features (continued)

Feature Description

Power supplies

Catalyst 4948E

• Supports one or two power supplies. The following power supplies are

supported:

–

PWR-C49E-300AC-R (300 W AC-input power supply).

–

PWR-C49-300DC (300 W DC-input power supply).

Note The power supplies are not interchangeable between the

Catalyst

• The front panels on both of the power supplies for the Catalyst 4948E

4948E and the Catalyst 4948E-F switch chassis.

are color-coded dark grey.

Note The 300 W AC-input power supply requires single-phase source AC.

Source AC can be out of phase between multiple power supplies because all AC power supply inputs are isolated.

Note Appendix A, “Power Supply Specifications” contains additional

information on both of the power supplies.

Chapter 1 Product Overview

Note If the redundant power supply is not installed, the empty power

supply bay should be covered using the blank power supply cover (p/n WS-X4994). The blank power supply cover is color-coded dark grey.

Catalyst 4948E-F • Supports one or two power supplies. The following power supplies are

supported:

–

PWR-C49E-300AC-F (300 W AC-input power supply, reversed air flow).

• The front panel on the power supply for the Catalyst 4948E-F is

color-coded blue.

Note The 300 W AC-input power supply requires single-phase source AC.

Source AC can be out of phase between multiple power supplies because all AC power supply inputs are isolated.

Note Appendix A, “Power Supply Specifications” contains additional

information on both of the power supplies.

Note If the redundant power supply is not installed, the empty power

supply bay should be covered using the blank power supply cover (p/n WS-X4994-F). The blank power supply cover is color-coded blue.

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Chapter 1 Product Overview

Physical and Environmental Specifications

Table 1-2 and Ta ble 1-3 lists the Catalyst 4948E and Catalyst 4948E-F switch chassis environmental and

physical specifications.

Ta b l e 1-2 Catalyst 4948E and Catalyst 4948E-F Switch Specifications - Environment, Heat Dissipation, Shock and

Vibrations, Physical Characteristics, and Airflow

Item Specification

Environmental

Temperature, operating Certified for operation: 32° to 104°F (0° to 40°C)

Designed and tested for operation: 32° to 131°F (0° to 55°C)

Temperature, nonoperating and storage

Thermal transition 0.5°C per minute (hot to cold)

Humidity (RH), ambient (noncondensing) operating

Altitude, operating Certified for operation: 0 to 6500 ft (0 to 2000 m)

Heat Dissipation 1364 BTU/hour (worst case)

Shock and Vibration Refer to Appendix D, “Regulatory Compliance and Safety Information” for

Physical Characteristics

Dimensions (H x W x D) • 1.75 x 17.5 x 19.4 in. (4.4 x 44.4 x 49.3 cm).

Chassis unpackaged: –4° to 149°F (–20° to 65°C)

Chassis in protective shipping package: –40° to 158°F (–40° to 70°C)

0.33°C per minute (cold to hot)

Operating: 5% to 90%

Nonoperating and storage: 5% to 95%

Designed and tested for operation: –200 to 10,000 ft (–60 to 3000 m)

shock and vibration compliance information for the switch.

• Chassis requires 1 RU.

• The Catalyst 4948E and the Catalyst 4948E-F switch chassis are

designed to install in standard 19-inch equipment racks that meet ANSI/EIA

310-D, IEC 60297, and ETS 300-119 standards.

Weight • 14 lb (6.35 kg). Base system; no power supplies and no fan tray.

• 19 lb (8.62 kg). Fully loaded system; two power supplies and a fan tray.

Airflow • 28 CFM (low speed)

• 44 CFM (high speed)

Ta b l e 1-3 Catalyst 4948E and Catalyst 4948E-F Switch Specifications - Acoustic Noise

Acoustic Noise Measured per ISO 7779 and declared per ISO 9296

Bystander positions operating mode at 25°C ambient.

Sound Pressure, dBA Sound Power, dBA

Model Typical, LpAm Maximum, LpAD Typical, LwA Maximum, LwAD

WS-C4948E 55.6 58.6 62.6 65.6

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1-7

Fan Tray

Note The two fan trays are not interchangeable between the Catalyst 4948E and the Catalyst 4948E-F chassis.

Chapter 1 Product Overview

Both the Catalyst 4948E and the Catalyst 4948E-F switch chassis have a fan tray that is mounted in the rear of the chassis between the two power supplies. The Catalyst 4948E chassis fan tray (WS-X4993=) provides front-to-back air flow in the chassis and has a front panel that is color-coded dark grey. The Catalyst

4948E-F chassis fan tray (WS-X4993-F=) provides back-to-front air flow and has a front panel

that is color-coded blue.

The WS-X4993-F fan tray is keyed to prevent insertion in the Catalyst 4948E chassis.

Individual fan speed within the fan trays is controlled by redundant temperature sensors located at the air flow inlet (in the front of the chassis for the Catalyst Catalyst

4948E-F). There are six programmable temperature thresholds that trigger fan speed change. If

4948E and in the rear of the chassis for the

there is an individual fan failure, the fan speed on the remaining fans is adjusted to try to compensate for the loss of the fan.

Table 1-4 lists the fan speed settings and the associated temperature thresholds.

Ta b l e 1-4 Fan Speeds Versus Chassis Temperature Thresholds

Fan Speed Setting

PWM1 Duty Cycle

Chassis Temperature Range Thresholds

Speed 0 41% T2—89.6°F (32°C)

Note At T2, the fan speed increases to Speed 1.

Speed 1 56% • T1—82.4°F (28°C)

• T4—102.2°F (39°C) Note At T1, the fan speed decreases to Speed 0. At T4, the fan

Speed 2 75% T3—95.0°F (35°C)

T6—116.6°F (47°C)

Note At T3, the fan speed decreases to Speed 1. At T6, the fan

Speed 3

1. Pulse-Width Modulation

2. Speed 3 is a fixed value and cannot be altered.

100% T5—Greater than 109.4°F (43°C)

Catalyst 4948E Fan Tray (WS-X4993=)

speed increases to Speed

1-8

The Catalyst 4948E fan tray (WS-X4993) contains four variable-speed, 12 VDC fans. (See Figure 1-3.) The fan tray is mounted in the rear of the chassis between the two power supplies.

Note The WS-X4993 fan tray is not interchangeable with the WS-X4993-F fan tray.

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207440

Figure 1-3 Catalyst 4948E Fan Tray

1 Backplane connector 3 12 VDC fan (4X). Air is drawn in from the

2 Captive installation screw (2X)

The fan tray draws in air through vents at the front of the chassis and exhausts it through the rear of the chassis as shown in

Fan Tray

278085

front of the chassis and exhausted through the rear of the chassis.

Figure 1-4.

Figure 1-4 Catalyst 4948E Chassis Airflow

Catalyst 4948E-F Fan Tray (WS-X4993-F=)

The Catalyst 4948E-F chassis fan tray (WS-X4993-F=) contains four variable-speed, 12 VDC fans. (See

Figure 1-5.) The fan tray is mounted in the rear of the chassis between the two power supplies.

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Fan Tray

Chapter 1 Product Overview

Note The WS-X4993-F fan tray is keyed to prevent insertion into the Catalyst 4948E switch chassis.

Figure 1-5 Catalyst 4948E-F Fan Tray

278085

1 Backplane connector 3 12 VDC fan (4X). Air is drawn in from the

rear of the chassis and exhausted through the front of the chassis.

2 Captive installation screw (2X)

The fan tray draws in air through vents at the rear of the chassis and exhausts it through the front of the chassis as shown in

Figure 1-6 Catalyst 4948E-F Chassis Airflow

Figure 1-6.

281614

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278086

Front Panel LEDs

A set of LEDs on the chassis front panel provide visual status for the switch. (See Figure 1-7.) Tab le 1-5 lists the Catalyst 4948E and Catalyst 4948E-F switch chassis front panel LEDs and their meanings.

Figure 1-7 Front Panel LEDs

Front Panel LEDs

1 PS1 (power supply 1) 4 STATUS 2 PS2 (power supply 2) 5 MGT (management port LED) 3 FAN (fa n tray) 6 LINK (port status). One LED for each uplink

and downlink port.

Ta b l e 1-5 Front Panel LED Descriptions

LED State and Meaning

STATUS Green—The system is up and running.

Red—System fault.

Flashing amber—Power-on self-test (POST) boot

up.

Off—System is not powered up.

LINK

48 10/100/1000 downlink port LEDs and 4 SFP/SFP+ uplink port LEDs

FAN (Fan tray)

PS1 (Power supply 1)

PS2 (Power supply 2)

1. There are three additional LEDs mounted on the power supply front panel that provide power supply status. These LEDs are only visible from the back of the chassis. For a description of the LEDs, see the

(PWR-C49E-300AC-R)” section on page A-1.

Green—Link is established.

Amber—Administrative disabled.

Off—No link is detected.

Green—Fan tray OK.

Red—One or more fan failures.

Green—AC-input or DC-input power is OK.

Red—Power supply fault detected.

Green—AC-input or DC-input power is OK.

Red—Power supply fault detected.

“300 W AC-Input Power Supply

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Front Panel LEDs

Chapter 1 Product Overview

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CHAP T ER

Preparing for Installation

Revised: July 2012

Planning a proper location for the switch and the layout of your equipment rack or wiring closet is essential for successful system operation. Equipment placed too close together or inadequately ventilated can cause system overtemperature conditions. In addition, poor equipment placement can make network interface connections inaccessible and difficult to maintain.

This chapter describes how to prepare your site for switch installation and includes these sections:

• Safety, page 2-1

• Site Requirements, page 2-2

• System Grounding, page 2-7

• Power Requirements, page 2-11

• Cabling Requirements, page 2-13

Safety

• Site Preparation Checklist, page 2-13

Tip For additional information about the Cisco Catalyst 4948E or the Catalyst 4948E-F switch (including

configuration examples and troubleshooting information), see the documents listed on this page:

http://www.cisco.com/en/US/products/ps6021/tsd_products_support_series_home.html

Safety warnings appear throughout this publication in procedures that may harm you if performed incorrectly. A warning symbol precedes each warning statement. The warnings below are general warnings that are applicable to the entire publication.

Warning

Only trained and qualified personnel should be allowed to install, replace, or service this equipment.

Statement 1030

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Site Requirements

Chapter 2 Preparing for Installation

Warning

This unit is intended for installation in restricted access areas. A restricted access area can be accessed only through the use of a special tool, lock and key, or other means of security.

Statement 1017

Voltages that present a shock hazard may exist on Power over Ethernet (PoE) circuits if interconnections are made using uninsulated exposed metal contacts, conductors, or terminals. Avoid using such interconnection methods, unless the exposed metal parts are located within a restricted access location and users and service people who are authorized within the restricted access location are made aware of the hazard. A restricted access area can be accessed only through the use of a special tool, lock and key or other means of security.

Site Requirements

These following sections describe some of the basic site requirements that you should be aware of as you prepare to install your Catalyst

• Rack-Mounting Guidelines, page 2-2

• Temperature, page 2-3

• Air Flow, page 2-4

• Humidity, page 2-5

• Altitude, page 2-5

Statement 1072

4948E or Catalyst 4948E-F switch:

• Dust and Particulates, page 2-5

• Corrosion, page 2-6

• Electromagnetic and Radio Frequency Interference, page 2-6

• Shock and Vibration, page 2-7

• Maintaining Safety with Electricity, page 2-9

• Preventing Electrostatic Discharge Damage, page 2-10

Rack-Mounting Guidelines

A rack-mount kit (69-2037-xx) is included in the accessory kit for mounting the switch in a standard 19-inch (48.3

• Racks with obstructions (such as power strips) that could impair access to the switch

Before rack-mounting the switch, ensure the following:

• The equipment rack is the proper size.

–

cm) equipment rack. This rack-mount kit is not suitable for use in the following situations:

The width of the rack, between the two front-mounting strips or rails, must be 17.75 inches (45.09

cm).

The depth of the rack, between the front- and rear-mounting strips, must be at least 19.25 inches (48.9

cm) but not more than 32.5 inches (82.5 cm).

The rack must have sufficient vertical clearance to insert the chassis. The chassis height is 1 U (1.75

inches (4.45 cm)).

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• The equipment rack is stable and in no danger of falling over.

–

• The equipment rack is properly ventilated.

–

Site Requirements

Ensure that the shelf is constructed to support the weight and dimensions of the chassis.

We recommend that you bolt the rack to the floor.

Mount the unit at the bottom of the rack if it is the only unit in the rack.

Install heavier equipment in the lower half of the rack to maintain a low center of gravity and prevent the rack from becoming top-heavy and tipping over.

Install the stabilizers before mounting or servicing the switch in the rack (if the rack is provided with stabilizing devices).

Install the chassis in an enclosed rack only if it has adequate ventilation or an exhaust fan; use an open rack whenever possible.

Ensure that the ambient temperature of the rack environment does not exceed a maximum temperature of 104°F (40°C). If the switch is installed in a closed or multiunit rack assembly, the ambient operating temperature of the rack environment might be higher than the ambient room temperature.

Ensure that the ventilation system in a closed rack does not prevent cooling by creating negative pressure around the chassis and redirecting the air away from the chassis intake vent. If necessary, operate the chassis with the rack open.

Ensure that equipment installed near the bottom of a rack does not generate excessive heat, which can be drawn upward and into the air intakes of equipment above. This situation can cause overtemperature conditions in the chassis at or near the top of the rack.

Temperature

–

Consider the equipment and cabling that is already installed in the rack. Ensure that cables from other equipment will not obstruct the airflow through the chassis or impair access to the power supplies or switching modules. Route cables away from field-replaceable components to avoid disconnecting cables unnecessarily for equipment maintenance or upgrades.

–

Allow at least 3 to 4 feet (91.4 to 121.9 cm) of clearance behind the rack for maintenance and removal of switch assemblies. If the rack is mobile, you can push it back within 1 foot (30.45 cm) of a wall or cabinet for normal operation and pull it out when necessary for maintenance.

Temperature extremes can cause a system to operate at reduced efficiency and cause a variety of problems, including premature aging and failure of chips, and failure of mechanical devices. Extreme temperature fluctuations can cause chips to become loose in their sockets. Observe the following guidelines:

• Ensure that the system is operating in an environment no colder than 50°F (10°C) or hotter than

104°F (40°C).

• Ensure that the chassis has adequate ventilation.

• Use proper air circulation management techniques. Chassis mounted higher in a rack enclosure are

susceptable to higher ambient air temperatures due to the heat generated from chassis that are mounted below the chassis in the rack.

• Do not place the chassis within a closed-in wall unit or on top of cloth, which can act as insulation.

• Do not place the chassis where it will receive direct sunlight, particularly in the afternoon.

• Do not place the chassis next to a heat source of any kind, including heating vents.

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Air Flow

Chapter 2 Preparing for Installation

• Ensure that all slots and openings on a chassis remain unobstructed, especially the fan tray vent at

the back of the chassis. Adequate ventilation is particularly important at high altitudes where the air is thinner.

• Clean the installation site at regular intervals to avoid buildup of dust and debris, which can cause a

system to overheat.

• Allow a 2-hour warm-up period to bring the chassis up to normal operating temperature before

turning it on for chassis that have been exposed to abnormally cold temperatures.

Failure to observe these guidelines can damage internal chassis components.

Note The Catalyst 4948E and the Catalyst 4948E-F switches are equipped with internal air temperature

sensors that are triggered above 104°F (40°C) generating a minor alarm and above 131°F (55°C) generating a major alarm. Enter the command show environment status to determine the exact temperature when the alarms are generated.

The Catalyst 4948E and Catalyst 4948E-F switches are designed to be installed in an environment where there is a sufficient volume of air available to cool the chassis and the power supplies. Any constraints placed on the free flow of air through the chassis or an elevated ambient air temperature can cause the switch to overheat and shut down.

To maintain proper air circulation through the switch chassis, we recommend that you maintain a minimum 6-inch (15

cm) separation between a wall and the chassis hot air exhaust. Failure to maintain adequate spacing between chassis can cause the switch chassis that is drawing in the hot exhaust air to overheat and fail.

If you are installing your Catalyst 4948E or Catalyst 4948E-F switch chassis in an enclosed or partially enclosed rack, we strongly recommend that you verify that your site meets the following guidelines:

• Verify that the ambient air temperature within the enclosed or partially enclosed rack is within the

chassis operating temperature limits. After installing the chassis in the rack, power up the chassis and allow the chassis temperature to stabilize (approximately 2 hours). Measure the ambient air temperature at the chassis air intake grill and at the chassis air exhaust grill by positioning an external temperature probe approximately 1

–

If the ambient intake air temperature is less than 104°F (40°C), the rack meets the intake air

inch (2.5 cm) away from the grills.

temperature criterion.

–

If the ambient intake air temperature exceeds 104°F (40°C), the system might experience minor temperature alarms and is in danger of overheating.

–

If the ambient intake air temperature equals or is greater than 131°F (55°C), the system will experience a major temperature alarm and shut down.

• Verify that the enclosed or partially enclosed rack allows an adequate flow of air through the switch

chassis as follows:

–

If the difference between the measured intake air temperature and the exhaust air temperature does not exceed 10°C, there is sufficient airflow in the rack.

–

If the difference in air temperature exceeds 10°C, there is insufficient airflow to cool the chassis.

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Note The 10°C temperature differential between the intake and the exhaust must be determined by

• Plan for future growth. Your Catalyst 4948E or Catalyst 4948E-F switches currently installed in an

• If you are installing the Catalyst 4948E-F in a data center that uses the hot isle and cold isle style of

Humidity

Site Requirements

taking measurements using external digital temperature probes. Do not use the chassis internal temperature sensors to measure the temperature differential.

enclosed or partially enclosed rack might meet ambient air temperature and air flow requirements now. However, if you add more chassis or other equipment to the rack, the additional heat generated might cause the ambient air temperature within the rack to exceed 104°F (40°C) and can cause minor alarms.

cooling, we recommend that you use an optional inlet air duct to extend the chassis air intake to the cold isle. Panduit Corporation manufactures a Modular ToR Switch Inlet Duct (Model CDE2) that can be installed along with the Catalyst the cold isle at the front of the rack enclosure.

4948E-F chassis to extend the switch chassis air intake to

High-humidity conditions can cause moisture migration and penetration into the system. This moisture can cause corrosion of internal components and degradation of properties such as electrical resistance, thermal conductivity, physical strength, and size. Extreme moisture buildup inside the system can result in electrical shorts, which can cause serious damage to the system. Each system is rated to operate at 8 to 80 percent relative humidity, with a humidity gradation of 10 percent per hour. In storage, a system can withstand from 5 to 95 percent relative humidity. Buildings in which climate is controlled by air-conditioning in the warmer months and by heat during the colder months usually maintain an acceptable level of humidity for system equipment. However, if a system is located in an unusually humid location, a dehumidifier can be used to maintain the humidity within an acceptable range.

Altitude

Operating a system at high altitude (low pressure) reduces the efficiency of forced and convection cooling and can result in electrical problems related to arcing and corona effects. This condition can also cause sealed components with internal pressure, such as electrolytic capacitors, to fail or perform at reduced efficiency. Each system is rated to operate at altitudes from –50 to 6500 1981

meters) and can be stored at altitudes of –50 to 35,000 feet (–16 to 10,668 meters).

Dust and Particulates

Fans cool the power supplies and the system components by drawing in room temperature air, circulating the air through the power supplies and the chassis, and exhausting the heated air out through various openings in the chassis. However, fans also ingest dust and other particulates, causing contaminant buildup on the fan blades and in the system. This can create a thermal blanket on components increasing the internal chassis temperature.

A clean operating environment can greatly reduce the negative effects of dust and other particulates. The standards listed below provide guidelines for acceptable working environments and acceptable levels of suspended particulate matter:

feet (–16 to

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Site Requirements

• National Electrical Manufacturers Association (NEMA) Type 1

• International Electrotechnical Commission (IEC) IP-20

Corrosion

Corrosion of system connectors is a gradual process that can eventually lead to intermittent failures of electrical circuits. The oil from a person’s fingers or prolonged exposure to high temperature or humidity can corrode the gold-plated edge connectors and pin connectors on various components in the system. To prevent corrosion, avoid touching contacts on boards and cards, and protect the system from extreme temperatures and moist, salty environments.

Electromagnetic and Radio Frequency Interference

Electromagnetic interference (EMI) and radio frequency interference (RFI) from a system can adversely affect devices such as radio and television (TV) receivers operating near the system. Radio frequencies emanating from a system can also interfere with cordless and low-power telephones. Conversely, RFI from high-power telephones can cause spurious characters to appear on the system monitor. RFI is defined as any EMI with a frequency above 10 kilohertz (kHz). This type of interference can travel from the system to other devices through the power cable and power source or through the air like transmitted radio waves. The Federal Communications Commission (FCC) publishes specific regulations to limit the amount of EMI and RFI emitted by computing equipment. Each system meets these FCC regulations. To reduce the possibility of EMI and RFI, follow these guidelines:

Chapter 2 Preparing for Installation

• Only operate the system with the chassis covers installed.

• Ensure that an unused power supply bay has a metal cover plate installed.

• Ensure that the screws on all peripheral cable connectors are securely fastened to their

corresponding connectors on the back of the chassis.

• Always use shielded cables with metal connector shells for attaching peripherals to the system.

When wires are run for any significant distance in an electromagnetic field, interference can occur between the field and the signals on the wires. This fact has two implications for the construction of plant wiring:

• Bad wiring practice can result in radio interference emanating from the plant wiring.

• Strong EMI, especially when it is caused by lightning or radio transmitters, can destroy the signal

drivers and receivers in the chassis, and even create an electrical hazard by conducting power surges through lines into equipment.

Note To predict and remedy strong EMI, you may also need to consult experts in radio frequency interference

(RFI).

If you use twisted-pair cable in your plant wiring with a good distribution of grounding conductors, the plant wiring is unlikely to emit radio interference. If you exceed the recommended distances, use a high-quality twisted-pair cable with one ground conductor for each data signal when applicable.

2-6

Caution Category 5e, Category 6, and Category 6a cables can store large levels of static electricity because of the

dielectric properties of the materials used in their construction. Always ground the cables (especially in new cable runs) to a suitable and safe earth ground before connecting them to the module.

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If the wires exceed the recommended distances, or if wires pass between buildings, give special consideration to the effect of a lightning strike in your vicinity. The electromagnetic pulse caused by lightning or other high-energy phenomena can easily couple enough energy into unshielded conductors to destroy electronic devices. If you previously have had similar problems, you might want to consult experts in electrical surge suppression and shielding.

Shock and Vibration

Catalyst 4948E and Catalyst 4948E-F switches have been shock- and vibration-tested for operating ranges, handling, and earthquake standards to NEBS (Zone 4 per GR-63-Core). These tests have been conducted in earthquake environment and criteria, office vibration and criteria, transportation vibration and criteria, and packaged equipment shock.

Power Source Interruptions

Systems are especially sensitive to variations in voltage supplied by the AC power source. Overvoltage, undervoltage, and transients (or spikes) can erase data from memory or even cause components to fail. To protect against these types of problems, power cables should always be properly grounded. Also, place the system on a dedicated power circuit (rather than sharing a circuit with other heavy electrical equipment). In general, do not allow the system to share a circuit with any of the following:

Power Source Interruptions

• Copy machines

• Air conditioners

• Vacuum cleaners

• Space heaters

• Power tools

• Teletype machines

• Laser printers

• Facsimile machines

• Any other motorized equipment

Besides these appliances, the greatest threats to a system power supply are surges or blackouts that are caused by electrical storms. Whenever possible, turn off the system and any peripherals, and unplug them from their power sources during thunderstorms. If a blackout occurs—even a temporary one—while the system is turned on, turn off the system immediately and disconnect it from the electrical outlet. Leaving the system on may cause problems when the power is restored; all other appliances left on in the area can create large voltage spikes that can damage the system.

System Grounding

You must install a NEBS-compliant system ground as part of the chassis installation process. Chassis installations that rely only on the AC third-prong ground are insufficient to properly and adequately ground the systems. Both chassis comes with a ground lug and two M4 bolts as part of the accessory kit. The lug attaches to the chassis grounding pad with the two bolts. A 6 must be used to connect the ground lug to the NEBS-compliant building ground.

AWG copper wire (not provided)

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System Grounding

Caution Installations that rely solely on system grounding using only an AC third-prong ground run a

Chapter 2 Preparing for Installation

Proper grounding practices ensure that the buildings and the installed equipment within them have low-impedance connections and low-voltage differentials between chassis. When you include NEBS-compliant system grounds, you reduce or prevent shock hazards, greatly reduce the chances of equipment damage due to transients, and substantially reduce the potential for data corruption.

Without proper and complete system grounding, you run the risk of increased component damage due to ESD. Additionally, you have a greatly increased chance of data corruption, system lockup and frequent system reboot situations by not using a system (NEBS compliant) ground.

substantially greater risk of equipment problems and data corruption than those installations that use both the AC third-prong ground and a properly installed system (NEBS compliant) ground.

Table 2-1 lists some general grounding practice guidelines.

Ta b l e 2-1 Grounding Practice Guidelines

Environment Electromagnetic

Noise Severity Level

Commercial building is

High All lightning protection devices must be subjected to direct lightning strikes.

For example, some places in the United States, such as Florida, are subject to more lightning strikes than other areas.

Commercial building is located

High Grounding best practices must be closely in an area where lightning storms frequently occur but is not subject to direct lightning strikes.

Commercial building contains a

Medium to High Grounding best practices must be closely mix of information technology equipment and industrial equipment, such as welding.

Existing commercial building is

Medium Grounding best practices must be closely not subject to natural environmental noise or man-made industrial noise. This building contains a standard office environment. This installation has a history of malfunction due to electromagnetic noise.

Grounding Recommendations

installed in strict accordance with manufacturer recommendations. Conductors carrying lightning current should be spaced away from power and data lines in accordance with applicable recommendations and codes. Best grounding practices must be closely followed.

followed.

followed. Determine source and cause of noise if possible, and mitigate as closely as possible at the noise source or reduce coupling from the noise source to the victim equipment.

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Table 2-1 Grounding Practice Guidelines (continued)

System Grounding

Environment Electromagnetic

Grounding Recommendations

Noise Severity Level

New commercial building is not subject to natural environmental noise or man-made industrial noise. This building contains a standard office environment.

Low Grounding best practices should be followed

as closely as possible. Electromagnetic noise problems are not anticipated, but installing a best practice grounding system in a new building is often the least expensive route and the best way to plan for the future.

Existing commercial building is not subject to natural environmental noise or man-made industrial noise. This building contains a standard

Low Grounding best practices should be followed

as much as possible. Electromagnetic noise problems are not anticipated, but installing a best practice grounding system is always recommended.

office environment.

Note In all situations, grounding practices must comply with Section 250 of the National Electric Code (NEC)

requirements or local laws and regulations. A 6

AWG grounding wire is preferred from the chassis to the rack ground or directly to the common bonding network (CBN). The equipment rack should also be connected to the CBN with 6 AWG grounding wire.

Caution Category 5e, Category 6, and Category 6a cables can store large levels of static electricity because of the

dielectric properties of the materials used in their construction. Always ground the cables (especially in new cable runs) to a suitable and safe earth ground before connecting them to the port on the switch.

Maintaining Safety with Electricity

When working on electrical equipment, follow these guidelines:

• Do not work alone if potentially hazardous conditions exist anywhere in your work space.

• Never assume that power is disconnected from a circuit; always check the circuit before working on

it.

• Look carefully for possible hazards in your work area, such as damp floors, ungrounded power

extension cables, frayed or damaged power cords, and missing safety grounds.

• If an electrical accident occurs, proceed as follows:

–

Use extreme caution; do not become a victim yourself.

–

Disconnect power from the system.

–

If possible, send another person to get medical aid. Otherwise assess the condition of the victim, and then call for help.

–

Determine if the person needs rescue breathing or external cardiac compressions; then take appropriate action.

• Use the product within its marked electrical ratings and product usage instructions.

• Install the product in compliance with local and national electrical codes.

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System Grounding

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• If any of the following conditions occur, contact the Cisco Technical Assistance Center:

–

The power cable or plug is damaged.

–

An object has fallen into the product.

–

The product has been exposed to water or other liquids.

–

The product has been dropped or shows signs of damage.

–

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

• Use the correct external power source. Operate the product only from the type of power source

indicated on the electrical ratings label. If you are not sure of the type of power source required, consult the Cisco Technical Assistance Center or a local electrician.

• Use approved power cables only. You have been provided with one or more power cables with your

chassis power supply that are intended for use in your country, based on the shipping location. Should you need to purchase additional power cables, ensure that they are 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 power cable should be greater than the ratings marked on the label.

• To help prevent electrical shock, plug all power cables into properly grounded electrical outlets.

These power cables are equipped with three-prong plugs to help ensure proper grounding. Do not use adapter plugs or remove the grounding prong from a power cable.

• Observe power strip ratings. Make sure that the total current rating of all products that are plugged

into the power strip does not exceed 80

• Do not modify power cables or plugs yourself. Consult with a licensed electrician or your power

percent of the power strip rating.

company for site modifications. Always follow your local and national wiring codes.

Preventing Electrostatic Discharge Damage

Electrostatic discharge (ESD) damage, which can occur when modules or other FRUs are improperly handled, results in intermittent or complete failures. Modules consist of printed circuit boards that are fixed in metal carriers. Electromagnetic interference (EMI) shielding and connectors are integral components of the carrier. Although the metal carrier helps to protect the board from ESD, always use an ESD grounding strap when handling modules.

To prevent ESD damage, follow these guidelines:

• Always use an ESD wrist strap and ensure that it makes maximum contact with bare skin. ESD

grounding straps are available with banana plugs, metal spring clips, or alligator clips. If you choose to use the disposable ESD wrist strap supplied with most FRUs or an ESD wrist strap equipped with an alligator clip, you must attach the system ground lug to the chassis in order to provide a proper grounding point for the ESD wrist strap.

Note This system ground is also referred to as the network equipment building system (NEBS)

ground.

• If your chassis does not have the system ground attached, you must install the system ground.

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After you install the system ground lug, follow these steps to correctly attach the ESD wrist strap:

Step 1 Attach the ESD wrist strap to bare skin as follows:

a. If you are using the ESD wrist strap supplied with the FRUs, open the wrist strap package and

unwrap the ESD wrist strap. Place the black conductive loop over your wrist and tighten the strap so that it makes good contact with your bare skin.

b. If you are using an ESD wrist strap equipped with an alligator clip, open the package and remove

the ESD wrist strap. Locate the end of the wrist strap that attaches to your body and secure it to your bare skin.

Step 2 Grasp the spring or alligator clip on the ESD wrist strap and momentarily touch the clip to a bare metal

spot (unpainted surface) on the rack. We recommend that you touch the clip to an unpainted rack rail so that any built-up static charge is then safely dissipated to the entire rack.

Step 3 Attach either the spring clip or the alligator clip to the ground lug screw as follows:

a. If you are using the ESD wrist strap that is supplied with the FRUs, squeeze the spring clip jaws

open, position the spring clip to one side of the system ground lug screw head, and slide the spring clip over the lug screw head so that the spring clip jaws close behind the lug screw head.

Power Requirements

Note The spring clip jaws do not open wide enough to fit directly over the head of the lug screw

or the lug barrel.

b. If you are using an ESD wrist strap that is equipped with an alligator clip, attach the alligator clip

directly over the head of the system ground lug screw or to the system ground lug barrel.

Caution For safety, periodically check the resistance value of the antistatic strap. The measurement should be

between 1 and 10 megohm (Mohm).

Power Requirements

When preparing your site for the switch installation, follow these general requirements:

• In systems configured with two power supplies, connect each of the two power supplies to a separate

input power source. If you fail to do this, your system might be susceptible to total power failure due to a fault in the external wiring or a tripped circuit breaker.

• To prevent a loss of input power, be sure that the total maximum load on each source circuit is within

the current ratings of the wiring and breakers.

• In some systems, you may decide to use an uninterruptible power supply (UPS) to protect against

power failures at your site. Be aware when selecting a UPS that some UPS models that use ferroresonant technology can become unstable when operating with the power supplies which use power factor correction (PFC). This can cause the output voltage waveform to the switch to become distorted resulting in an undervoltage situation in the system.

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Power Requirements

Power Connection Guidelines for AC-Powered Systems

This section provides some basic guidelines for connecting the AC power supplies to the site power source:

• Each chassis power supply should have a separate, dedicated branch circuit.

• For North America:

–

The 300 W power supply requires a 15 A circuit.

• For International:

–

Circuits should be sized according to local and national codes.

• If you are using a 200/240 VAC power source in North America, the circuit must be protected by a

two-pole circuit breaker.

• The source AC outlet must be within 6 feet (1.8 meters) of the system and should be easily

accessible.

• The AC power receptacles used to plug in the chassis must be the grounding type. The grounding

conductors that connect to the receptacles should connect to protective earth ground at the service equipment.

Chapter 2 Preparing for Installation

Power Connection Guidelines for DC-Powered Systems

This section provides the basic guidelines for connecting the Catalyst 4948E switch DC-input power supplies to the site power source:

• All power connection wiring should conform to the rules and regulations in the National Electrical

Code (NEC), as well as any local codes.

• The DC return must remain isolated from the system frame and the chassis (DC-I).

• For DC power cables, we recommend that you use commensurately rated, high-strand-count copper

wire cable. Connection to the DC-input power supply requires one earth ground cable, one source DC (–), and one source DC return (+). The length of the cables depends on your switch location. The cables and the lugs required to attach the source DC cables to the power supply are not available from Cisco Systems. They are available from any commercial cable vendor.

• The color coding of the source DC power cable leads depends on the color coding of the site DC

power source. Typically, green or green and yellow indicate that the cable is a ground cable. Because there is no color code standard for source DC wiring, you must ensure that the power cables are connected to the DC-input power supply terminal block in the proper (+) and (–) polarity. In some cases, the source DC cable leads might have a positive (+) or a negative (–) label. This label is a relatively safe indication of the polarity, but you must verify the polarity by measuring the voltage between the DC cable leads. When making the measurement, the positive (+) lead and the negative (–) lead must always match the (+) and (–) labels on the DC-input power supply terminal block.

• DC power cables must be terminated by cable lugs at the power supply end.

• The circuit breaker is considered to be the disconnect device and should be easily accessible.

2-12

• The circuit must be protected by a dedicated two-pole circuit breaker. The circuit breaker should be

sized according to the power supply input rating and local or national code requirements.

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Chapter 2 Preparing for Installation

Cabling Requirements

Caution The intrabuilding port(s) of the equipment or subassembly is suitable for connection to intrabuilding or

unexposed wiring or cabling only. The intrabuilding port(s) of the equipment or subassembly must not be metallically connected to interfaces that connect to the Outside Plant (OSP) or its wiring. These interfaces are designed for use as intrabuilding interfaces only (Type GR-1089-CORE, Issue Protectors is not sufficient protection to connect these interfaces metallically to OSP wiring.

When running power and data cables together in overhead cable trays or subfloor cable trays, be aware of the following caution:

Caution We strongly recommend that power cabling runs and other potential noise sources be located as far away

as practical from LAN cabling that terminates on Cisco equipment. In situations, where this type of long parallel cable runs exist, which cannot be separated by at least 3.3 you shield these potential noise sources. To avoid interference, the source should be shielded by housing it in a grounded metallic conduit.

Cabling Requirements

2 or Type 4 ports as described in

4) and require isolation from the exposed OSP cabling. The addition of Primary

feet (1 meter), we recommend that

Also be aware of the following caution concerning the use of Category 5e and Category 6 Ethernet cables:

Caution Category 5e, Category 6, and Category 6a cables can store large levels of static electricity because of the

dielectric properties of the materials used in their construction. Always ground the cables (especially in new cable runs) to a suitable and safe earth ground before connecting them to the module.

Site Preparation Checklist

Table 2-2 lists the site planning activities that you should perform prior to installing the switch.

Completing each activity helps ensure a successful switch installation.

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2-13

Site Preparation Checklist

Ta b l e 2-2 Site Planning Checklist

Task No. Planning Activity Verified By Time Date

1 Space evaluation:

• Space and layout

• Floor covering

• Impact and vibration

• Lighting

• Maintenance access

2 Environmental evaluation:

• Ambient temperature

• Humidity

• Altitude

• Atmospheric contamination

• Airflow

3 Power evaluation:

Chapter 2 Preparing for Installation

• Input power type

• Power receptacles (Depends on power supply)

• Receptacle proximity to the equipment

• Dedicated (separate) circuits for redundant

power supplies

• UPS for power failures

• DC systems: Proper gauge wire and lugs

4 Grounding evaluation:

• Circuit breaker size

• CO ground (AC- and DC-powered systems)

5 Cable and interface equipment evaluation:

• Cable type

• Connector type

• Cable distance limitations

• Interface equipment (transceivers)

6 EMI evaluation:

• Distance limitations for signaling

• Site wiring

• RFI levels

1. Verify that each power supply installed in the chassis has a dedicated AC source or DC source circuit.

2. Refer to the power supply’s kVA rating as a sizing criteria in determining the output required by the UPS. The power supply’s kVA rating value is listed in the specifications table for each power supply in Appendix A.

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CHAP T ER

Installing the Switch

Revised: January 4, 2012

This chapter describes how to install the Catalyst 4948E switch in an equipment rack.

• Preparing to Install the Chassis, page 3-1

• Rack-Mounting the Chassis, page 3-5

• Installing the System Ground, page 3-10

• Connecting Power to the Switch, page 3-12

• Attaching the Interface Cables, page 3-15

• Powering Up the Switch, page 3-21

Note Before starting the installation procedures in this chapter, complete the site planning checklist in

Chapter 2, “Preparing for Installation” to verify that all planning activities were completed.

Preparing to Install the Chassis

This section covers these topics:

• Warnings, page 3-2

• Verifying Package Contents, page 3-4

• Required Tools, page 3-4

• Lifting the Chassis Safely, page 3-5

Tip For additional information about the Cisco Catalyst 4948E and the Catalyst 4948E-F switches (including

configuration examples and troubleshooting information), see the documents listed on this page:

http://www.cisco.com/en/US/products/ps6021/tsd_products_support_series_home.html

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Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

3-1

Preparing to Install the Chassis

Warnings

Chapter 3 Installing the Switch

The installation-applicable warnings are listed below. Warning translations in multiple languages are provided in Appendix

D. Refer to the statement number for the translations.

Warning

To prevent the switch from overheating, do not operate it in an area that exceeds the maximum recommended ambient temperature of 104°F (40°C). To prevent airflow restriction, allow at least 3 inches (7.6 cm) of clearance around the ventilation openings.

Statement 17

This unit is intended for installation in restricted access areas. A restricted access area is where access can only be gained by service personnel through the use of a special tool, lock and key, or other means of security, and is controlled by the authority responsible for the location.

Statement 37

This equipment is intended to be grounded. Ensure that the host is connected to earth ground during normal use.

Statement 39

Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals.

Statement 43

Do not stack the chassis on any other equipment. If the chassis falls, it can cause severe bodily injury and equipment damage.

Statement 48

3-2

Warning

Ethernet cables must be shielded when used in a central office environment.

Do not work on the system or connect or disconnect cables during periods of lightning activity.

Statement 1001

Warning

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

Read the installation instructions before connecting the system to the power source.

Statement 171

Statement 1004

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Chapter 3 Installing the Switch

Preparing to Install the Chassis

Warning

To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to ensure that the system remains stable. The following guidelines are provided to ensure your safety:

• This unit should be mounted at the bottom of the rack if it is the only unit in the rack.

• When mounting this unit in a partially filled rack, load the rack from the bottom to the top with the heaviest component at the bottom of the rack.

•

If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the unit in the rack.

Class 1 laser product.

Statement 1006

Statement 1008

This unit is intended for installation in restricted access areas. A restricted access area can be accessed only through the use of a special tool, lock and key, or other means of security.

Statement 1017

Only trained and qualified personnel should be allowed to install, replace, or service this equipment.

Statement 1030

Warning

Ultimate disposal of this product should be handled according to all national laws and regulations.

Statement 1040

This product requires short-circuit (overcurrent) protection, to be provided as part of the building installation. Install only in accordance with national and local wiring regulations.

Statement 1045

When installing or replacing the unit, the ground connection must always be made first and disconnected last.

Statement 1046

Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into beams or view directly with optical instruments.

Installation of the equipment must comply with local and national electrical codes.

Statement 1051

Statement 1074

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3-3

Preparing to Install the Chassis

Verifying Package Contents

Carefully remove the chassis and accessory kit from the shipping container, and check each item for damage. If any item is missing or damaged, contact your Cisco representative or reseller for support. Return all packing material to the shipping container, and save it.

The chassis is shipped with these items in the accessory kit:

• One RJ-45 female-to-DB-9 female adapter plug

• System ground kit

• Rack-mounting kit that contains the following items:

–

Two 19-inch rack-mounting brackets

–

Eight M4 x 8 mm Phillips flat-head screws for attaching the brackets to the switch

–

Four 12-24 x 3/4-inch and four 10-32 x 3/4-inch Phillips machine screws for attaching the rack-mount brackets to a rack

–

Disposable ESD wrist strap

Chapter 3 Installing the Switch

Note A console cable is not provided in the accessory kit. It can ordered as an option.

Required Tools

To properly install the chassis, you need the following tools and equipment:

• No. 1 Phillips screwdriver

• No. 2 Phillips screwdriver

• 3/16-inch flat-blade screwdriver

• Antistatic mat or antistatic foam

• Your own ESD grounding strap or the disposable ESD strap included with the system

• Tape measure and level

• Copper system ground wire (the required wire gauge is determined by local or national electrical

codes)

• Source DC power cables (the required wire gauge is determined by local or national electrical codes)

• Either insulated crimp-on spade lugs or insulated crimp-on ring connectors (the required size and

style is determined by local or national electrical codes)

• Wire-stripping tool

• Crimping tool

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Chapter 3 Installing the Switch

Lifting the Chassis Safely

Whenever you lift a chassis, follow these guidelines:

• Always disconnect all external cables before lifting or moving the chassis.

• Ensure that your footing is solid, and balance the weight of the chassis between your feet.

• Lift the chassis slowly; never move suddenly or twist your body as you lift.

• Keep your back straight and lift with your legs, not your back. If you must bend down to lift the

chassis, bend at the knees, not at the waist, to reduce the strain on your lower back muscles.

Rack-Mounting the Chassis

There are three rack-mount kits and one cable management kit available for both the Catalyst 4948E and the Catalyst the Catalyst

Ta b l e 3-1 Catalyst 4948E and Catalyst 4948E-F Chassis Rack-Mount and Cable Management

4948E-F switch chassis. Additionally, there is one optional inlet air duct kit that is available only for

4948E-F switch. Table 3-1 lists the kits and describes their contents.

Kits

Rack-Mounting the Chassis

Kit Part Number Description

69-2037-xx Standard rack-mount kit for both chassis. Kit includes brackets and

screws. The kit ships with the chassis as part of the accessory kit. Installation instructions are located in this chapter.

WS-X4948E-19CNTR= Center rack-mount kit for 19-inch racks. Kit includes brackets and

screws. The kit is available as a separately orderable option. Installation instructions are contained in a separate installation note available on cisco.com.

WS-X4948E-23CNTR= Center rack-mount kit for 23-inch racks. Available for both chassis. Kit

includes brackets and screws. The kit is available as a separately orderable option. Installation instructions are contained in a separate installation note available on cisco.com.

69-1303-xx Cable management bracket kit. Kit includes the cable management

bracket and screws. The kit ships with both chassis. Installation instructions are located in this chapter.

Panduit Corp. model CDE2 Modular ToR switch inlet air duct kit. The kit includes a switch ducting

enclosure, one switch support bracket, and installation hardware. The kit is an option, orderable from Panduit Corp. The kit is used only when installing the Catalyst the chassis in a hot isle and cold Installation instructions for the kit are provided in a separate installation note supplied with the air duct kit.

4948E-F switch chassis and only when installing

isle data center environment.

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The process for installing the Catalyst 4948E switch in a 19-inch rack is divided into the following topics:

• Attaching the Rack-Mount Brackets to the Chassis, page 3-6

• Installing the Chassis in the Rack, page 3-7

• Installing the Cable Guide (Optional), page 3-8

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

3-5

Rack-Mounting the Chassis

Attaching the Rack-Mount Brackets to the Chassis

Two rack-mount brackets are included as part of the rack-mount kit (69-2037-xx) supplied with both switch chassis. The rack-mount brackets can be installed either on the front sides of the chassis or on the rear sides of the chassis. The rack-mount standard 19-inch (48.3

cm). This rack-mount kit is not suitable for racks with obstructions (such as

power strips) that could impair access to the switch.

Note If you are installing the Catalyst 4948E-F switch chassis in a hot isle and cold isle data center

environment and plan on using the optional modular ToR switch inlet duct kit (Panduit model CDE2), you must install the rack-mount brackets to the front of the chassis.

To install the rack-mount brackets on the front sides of the chassis, follow these steps:

Step 1 Remove the two rack-mount brackets and eight M4 x 8 mm Phillips flat-head screws from the accessory

kit.

Step 2 Position one of the rack-mount brackets against one side of the chassis, and align the countersunk screw

holes with the M4 holes in the chassis. (See

brackets are intended for use in mounting the chassis in a

Figure 3-1.)

Chapter 3 Installing the Switch

Note In Figure 3-1, the top view shows the rack-mount brackets being attached to the front of the chassis. The

bottom view shows the rack-mount brackets being attached to the rear of the chassis.

Step 3 Secure the rack-mount bracket to the chassis with four M4 x 8 mm Phillips flat-screws. Step 4 Repeat Steps 2 and 3 for the second rack-mount bracket on the opposite side of the chassis.

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Chapter 3 Installing the Switch

Figure 3-1 Installing the Rack-Mount Brackets

Rack-Mounting the Chassis

1 M4 screws (4 screws per bracket) 2 Rack-mount bracket

Installing the Chassis in the Rack

To install the chassis in the rack, follow these steps:

Step 1 Have one person carefully lift and position the chassis in front of the rack. Step 2 Position the chassis in the rack until the rack-mount bracket ears are in contact with the rack.

Tip Use a tape measure or a level to ensure that the chassis is installed level in the rack.

Step 3 Adjust the chassis up or down in the rack until two screw holes in each rack-mount bracket ear are

aligned with corresponding mounting holes in the equipment rack post. Place a level on top of the chassis and verify that the chassis is not tilted in the equipment rack.

Step 4 While one person holds the chassis in place, secure the chassis to the rack with the four 10-32 x 3/4-inch

or the four 12-24 x 3/4-inch Phillips-head machine screws (two on each side) that are supplied in the accessory kit.

207508

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3-7

Rack-Mounting the Chassis

207510

Note Figure 3-2 (top view) shows how to install a chassis in a rack when the chassis has the

Figure 3-2 Installing the Chassis in the Rack

Chapter 3 Installing the Switch

rack-mount brackets attached at the front of the chassis. Figure 3-2 (bottom view) shows how to install a chassis in a rack when the chassis has the rack-mount brackets attached at the rear of the chassis.

1 12-24 or 10-32 screws (2 per bracket) 2 Equipment rack post

Installing the Cable Guide (Optional)

Note If the chassis is mounted to the rear posts of the equipment rack, the cable guide cannot be installed.

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

3-8

One cable guide is provided in the accessory kit. The cable guide attaches to the rack-mount bracket using a single M4 screw (a threaded M4 hole is provided in the rack-mount bracket). The cable guide is designed to be used when the rack-mount brackets are attached to the front of the chassis and can be attached to either the left side or the right side of the chassis.

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Chapter 3 Installing the Switch

To install the cable guide, follow these steps:

Step 1 Position the cable guide in front of either the left or right rack-mount bracket. Step 2 Attach the cable guide to either the left or right rack-mount bracket using the single M4 screw provided.

(See

Figure 3-3 Installing the Cable Guide

Rack-Mounting the Chassis

Figure 3-3.)

207511

Installing the Catalyst 4948E-F Switch Chassis with the Optional Panduit Air Duct Kit

If you are installing the Catalyst 4948E-F switch chassis in a data center that is configured as hot isle and cold isle, you might need to install the Panduit Air Duct kit, Model CDE2. The kit extends the air intake from the rear of the chassis to the front of the equipment rack allowing the system to draw in cool air from the cool isle. To install the air duct assembly, refer to the installation note that ships with the kit.

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3-9

Installing the System Ground

The system (NEBS) ground provides additional grounding for EMI shielding requirements and is intended to satisfy the Telcordia Technologies NEBS requirements for supplemental bonding and grounding connections.

To connect the system ground, you need the following tools and materials:

• Ground lug—A two-hole standard 90-degree barrel lug. Supports up to 6 AW G wi r e .

• Ground lug screws—Two M4 x 8 mm pan-head screws.

• Ground wire—The system ground wire should be sized according to local and national installation

requirements. Depending on the power supply and system, a 12 is required for U.S. installations. We recommend that you use commercially available 6 The length of the system ground wire depends on the proximity of the switch to proper grounding facilities.

• No. 1 Phillips screwdriver.

• Wire-stripping tool to remove the insulation from the ground wire.

• Crimping tool to crimp the system ground wire to the ground lug.

Chapter 3 Installing the Switch

AWG t o 6 AWG copper conductor

AWG wire.

Note The grounding lug and the grounding lug screws are supplied as part of the accessory kit. The grounding

wire and the tools are not supplied as part of the accessory kit.

To attach the system ground wire to the ground lug and attach the lug to the grounding pad, follow these steps:

Step 1 If you are using insulated wire, use a wire-stripping tool to remove approximately 0.75 inch (19 mm) of

the covering from the end of the ground wire. If you are using bare wire, go to Step

Step 2 Insert the stripped end of the ground wire into the open end of the ground lug. Step 3 Crimp the ground wire in the barrel of the ground lug. Verify that the ground wire is securely attached

to the ground lug.

Step 4 Remove the yellow label covering the chassis system ground pad on the back of the chassis. (See

Figure 3-4.)

Step 5 Place the ground wire lug against the system ground pad, making sure that there is solid metal-to-metal

contact.

Step 6 Secure the ground lug to the chassis with the two M4 screws supplied in the accessory kit. (See

Figure 3-4.) Route the system ground wire ensuring that it does not interfere with other switch hardware

or rack equipment.

Step 7 Prepare the other end of the ground wire, and connect it to an appropriate earth ground point in your site

to ensure adequate earth ground for the switch.

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Chapter 3 Installing the Switch

278168

INPUT

OUTPUT

PWR - 540 AC

100 - 240 VAC

7 - 3A

50 - 60 Hz

INPUT

OUTPUT

PWR - 540 AC

100 - 240 VAC

7 - 3A

50 - 60 Hz

Installing the System Ground

Figure 3-4 Installing the System Ground

1 Chassis grounding pad 4 M4 screws (2X) 2 System ground lug 5 Adhesive label (yellow). Covers grounding pad. 3 System ground wire

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3-11

Connecting Power to the Switch

This section provides instructions on connecting source power to the chassis. Two procedures are provided:

• Connecting AC Source Power to the Switch, page 3-12

• Connecting DC Source Power to the Switch, page 3-13

Note The Catalyst 4948E switch supports mixing AC-input and DC-input power supplies in the same chassis.

Connecting AC Source Power to the Switch

To connect source AC power to either a Catalyst 4948E or Catalyst 4948E-F switch, follow these steps:

Step 1 Verify that all of the site power and grounding requirements described in Chapter 2, “Preparing for

Installation” have been met and the chassis is properly grounded as described in the “System Grounding” section on page 2-7.

Chapter 3 Installing the Switch

Step 2 Verify that the power supply is fully seated in the chassis power supply bay and that the captive

installation screw on the power supply is tight. Verify that the AC power switch on the power supply is off.

Warning

Step 3 Remove the AC power cords from the accessory kit and verify that you have the correct ones for your

Step 4 Plug the AC power cord’s appliance connector (IEC60320/C15) into the power supply AC-in receptacle.

The plug-socket combination must be accessible at all times, because it serves as the main disconnecting device.

locale. If you are unsure as to the type of AC power cord required for your location, refer to the

AC-Input Power Supply Power Cords” section on page A-8 for a list of the AC power cords supported

by the AC-input power supplies and consult with your local electrician.

Figure 3-5 shows plug locations for both the PWR-C49E-300AC-R and the PWR-C49E-300AC-F power

supplies.

Note If you are using the optional Panduit Modular ToR Switch Inlet Duct kit (Model CDE2) with the

Catalyst Refer to the installation note supplied with the duct kit for instructions on how to do this.

Statement 1019

“300 W

4948E-F switch chassis, you need to thread the AC power cord through the air duct.

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Chapter 3 Installing the Switch

207518

INPUT

OUTPUT

PWR - 540 AC

100 - 240 VAC

7 - 3A 50 - 60 Hz

INPUT OK

OUTPUT

PWR - 540 AC

100 - 240 VAC

7 - 3A

50 - 60 Hz

Figure 3-5 Connecting Source AC to the AC-Input Power Supply

Step 5 Connect the other end of the power cord to an AC-power input source. If two power supplies will be used

to power the chassis, make sure that each AC-input power supply is plugged into its own dedicated circuit.

Connecting Power to the Switch

Note If you have only one power supply installed in the chassis, you must cover the empty power supply bay

with a blank power supply cover (Cisco p/n 800-25264-01). The blank power supply cover maintains EMI shielding and proper air flow through the chassis.

Step 6 Do not turn on the AC-input power supply power on/off switch at this time. Continue the installation

process by attaching the interface cables to the chassis ports.

Connecting DC Source Power to the Switch

Warning

Before performing any of the following procedures, ensure that power is removed from the DC circuit.

Statement 1003

This unit is intended for installation in restricted access areas. A restricted access area can be accessed only through the use of a special tool, lock and key, or other means of security.

Statement 1017

This product requires short-circuit (overcurrent) protection, to be provided as part of the building installation. Install only in accordance with national and local wiring regulations.

Statement 1045

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Warning

Hazardous voltage or energy may be present on DC power terminals. Always replace cover when terminals are not in service. Be sure uninsulated conductors are not accessible when cover is in place.

Statement 1075

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

3-13

Connecting Power to the Switch

To connect source DC power to the DC-input power supply installed in the Catalyst 4948E switch, follow these steps:

Step 1 Verify that all of the site power and grounding requirements described in “Power Requirements” section

on page 2-11 have been met and the chassis is properly grounded.

Step 2 Verify that power is off to the DC circuit you are going to attach to the DC-input power supply. As an

added precaution, place the appropriate safety flag and lockout devices at the source power circuit breaker, or place a piece of adhesive tape over the circuit breaker handle to prevent accidental power restoration while you are working on the circuit.

Step 3 Connect the DC cables to the source DC circuit breaker. Step 4 Verify that the DC-input power supply is fully seated in the chassis power supply bay and that the captive

installation screw on the power supply is tight.

Step 5 Remove the snap-on plastic safety cover from the DC-input power supply terminal block. Step 6 Attach the appropriate size and type of lugs to the source DC cables.

Either insulated crimp-on spade lugs or insulated crimp-on ring connectors can be used on the source DC cables. They should be sized according to local and national installation requirements and electrical codes.

Chapter 3 Installing the Switch

Note The wire should be sized according to local and national installation requirements and electrical

codes. Use only copper wire.

Step 7 Connect the source DC cable lugs to the power supply terminal block posts in this order (see Figure 3-6):

• Ground cable lug to the power supply ground terminal post.

• Negative (–) source DC cable lug to the power supply negative (–) terminal post.

• Positive (+) source DC cable lug to the power supply positive (+) terminal post.

Step 8 After ensuring that all of the cable connections are secure, reinstall the terminal block cover.

Caution To prevent a short circuit or shock hazard after wiring the DC-input power supply, you must reinstall the

terminal block cover.

Caution In a system with dual DC-input power supplies, connect each power supply to a separate power source.

In case of a power source failure to one supply, the second power source should still be available.

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Chapter 3 Installing the Switch

207517

INPUT

OUTPUT

PWR - C49-300DC

-48 To -60VAC 8A

INPUT

OUTPUT

PWR - C49-300DC

-48 To -60VAC 8A

Step 9 Do not turn source DC power on at this time. Continue the installation process by attaching the interface

cables to the chassis ports.

Figure 3-6 Connecting Source DC to the DC-Input Power Supply (PWR-C49-300DC)

Attaching the Interface Cables

1 Attach the source DC leads to the power

supply terminal block in the following order:

• Ground

• (–) negative

• (+) positive

Attaching the Interface Cables

This section covers attaching the interface cables to the chassis front panel connectors. The section is divided into the following topics:

Connecting to the Downlink Ports, page 3-16

Installing Uplink Port Transceivers and Cables, page 3-16

Connecting to the Ethernet Management Port, page 3-20

Connecting to the Console Port, page 3-20

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3-15

Attaching the Interface Cables

63065

Connecting to the Downlink Ports

Both chassis have 48 10/100/1000 ports. The ports configure themselves to operate at the speed of the attached devices. If the attached devices do not support autonegotiation, you can explicitly set the speed and duplex parameters.

To attach network cables to the downlink ports, follow these steps:

Step 1 Connect the RJ-45 plug at one end of the network cable to the target device port. Step 2 Connect the RJ-45 plug at the other end of the network cable to a downlink port on the Catalyst 4948E

chassis.

Step 3 Repeat Steps 1 and 2 for the remaining downlink ports.

Installing Uplink Port Transceivers and Cables

The four uplink ports on the Catalyst 4948E support either 1000BASE-X SFP or 10GBASE SFP+ transceivers. SFP transceivers can have three types of latching devices to secure an SFP transceiver in a port socket:

• Figure 3-7 shows an SFP transceiver with a Mylar tab latch.

• Figure 3-8 shows an SFP transceiver with an actuator button latch.

Chapter 3 Installing the Switch

• Figure 3-9 shows an SFP transceiver that has a bail-clasp latch.

Determine which type of latch your SFP transceiver uses before following the installation and removal procedures.

Caution Do not install or remove the SFP transceiver with fiber-optic cables attached to it. Doing so may damage

cables, cable connectors, or the optical interfaces and may interfere with the SFP transceiver latching properly into its socket connector. Disconnect all cables before removing or installing an SFP transceiver.

Removing and installing an SFP transceiver can shorten its useful life. Do not remove and insert SFP transceivers more often than is absolutely necessary.

Caution The SFP transceivers are static-sensitive devices. Always use an ESD wrist strap or similar individual

grounding device when handling SFP transceivers.

Figure 3-7 SFP Transceiver with a Mylar Tab Latch

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Chapter 3 Installing the Switch

63066

63067

Figure 3-8 SFP Transceiver with an Actuator Button Latch

Figure 3-9 SFP Transceiver with a Bail-Clasp Latch

To install either an SFP or SFP+ transceiver, follow these steps:

Attaching the Interface Cables

Step 1 Attach an ESD-preventive wrist strap to your wrist and to the ESD ground connector or a bare metal

surface on your chassis.

Step 2 Remove the SFP transceiver from its protective packaging.

Note Do not remove the optical bore dust plugs until directed to do so later in the procedure.

Step 3 Check the label on the SFP transceiver body to verify that you have the correct model for your network. Step 4 Find the send (TX) and receive (RX) markings that identify the top side of the SFP transceiver.

Note On some SFP transceivers, the TX and RX marking might be replaced by arrowheads pointing

from the SFP transceiver connector (transmit direction or TX) and toward the connector (receive direction or RX).

Step 5 Position the SFP transceiver in front of the socket opening.

Note Different Cisco devices have different SFP socket configurations. Your Cisco device could have

either a latch-up or a latch-down orientation. Ensure that you are installing the SFP transceiver in the correct orientation for your Cisco device.

Step 6 Holding it as shown in Figure 3-10, insert the SFP into the socket until you feel the connector latch into

place.

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3-17

Attaching the Interface Cables

94126

192406

Figure 3-10 Inserting an SFP Transceiver into a Socket

Step 7 Press the SFP transceiver into the slot firmly with your thumb as shown in Figure 3-11.

Figure 3-11 Latching the SFP Transceiver

Chapter 3 Installing the Switch

Step 8 To verify that the SFP transceiver is seated and latched properly:

a. Grasp the SFP transceiver as shown in Figure 3-12 and try to remove it without releasing the latch. b. If the SFP transceiver cannot be removed, it is installed and seated properly. If the SFP transceiver

can be removed, reinsert it and press harder with your thumb, repeating if necessary until it is latched securely into the socket.

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Chapter 3 Installing the Switch

Figure 3-12 Verifying the SFP Transceiver Installation

Attaching the Interface Cables

192383

Note For an optical SFP transceiver, before removing the dust plugs and making any optical connections,

observe the following guidelines:

• Always keep the protective dust plugs on the unplugged fiber-optic cable connectors and the

transceiver optical bores until you are ready to make a connection.

• Always inspect and clean the LC connector end-faces just before making any connections. See the

Tip on this page for a pointer to a fiber-optic inspection and cleaning white paper.

• Always grasp the LC connector housing to plug or unplug a fiber-optic cable.

Step 9 Remove the dust plugs from the network interface cable LC connectors. Save the dust plugs for future

use.

Step 10 Inspect and clean the LC connector’s fiber-optic end-faces.

Tip For complete information on inspecting and cleaning fiber-optic connections, see the white-paper

document at this URL:

http://www.cisco.com/en/US/tech/tk482/tk876/technologies_white_paper09186a0080254eba.shtml

Step 11 Remove the dust plugs from the SFP transceiver optical bores. Step 12 Immediately attach the network interface cable LC connector to the SFP transceiver.

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Attaching the Interface Cables

Step 13 To connect 1000BASE-T SFP transceivers to a copper network, follow these substeps:

Caution To comply with GR-1089 intrabuilding lightning immunity requirements, you must use grounded,

shielded, twisted-pair Category 5 cabling.

a. Insert the Category 5 network cable RJ-45 connector into the SFP transceiver RJ-45 connector.

b. Insert the other end of the network cable into an RJ-45 connector on a 1000BASE-T-compatible

Chapter 3 Installing the Switch

Note When connecting to a 1000BASE-T-compatible server, workstation, or router, use four

twisted-pair, straight-through Category 5 cabling for the SFP transceiver port. When connecting to a 1000BASE-T-compatible switch or repeater, use four twisted-pair, crossover Category 5 cabling.

target device.

Connecting to the Ethernet Management Port

Both chassis provide a Ethernet Management port that can be used to manage the switch through an Ethernet network. This port can also be used to download software to the switch or transfer files to remote servers for analysis or backup storage.

The typical connection to the Management Ethernet port uses an Ethernet cable with RJ-45 connectors at each end. The other end of the cable typically connects to an Ethernet switch, hub, or router that provides connectivity between the multishelf system and networks from which system management is desired.

To attach a cable to the Ethernet management port, follow these steps:

Step 1 Connect the RJ-45 plug at one end of the network cable to the target device port. Step 2 Connect the RJ-45 plug at the other end of the network cable to a Ethernet Management port on the

Catalyst

4948E chassis.

Connecting to the Console Port

You must use the console port to perform the initial configuration. To connect the switch console port to a PC, use an RJ-45-to-DB-9 adapter cable (optional).

To connect the PC or terminal to the Catalyst 4948E switch console port, follow these steps:

3-20

Step 1 Using an RJ-45-to-DB-9 adapter cable, insert the RJ-45 connector into the console port that is located

on the front of the switch.

Step 2 Attach the DB-9 female DTE of the adapter cable to a PC serial port, or attach an appropriate adapter to

the terminal.

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Chapter 3 Installing the Switch

Powering Up the Switch

This section provides a quick power-up procedure for a switch. The section is divided into the following topics:

• Starting the Terminal-Emulation Software, page 3-21

• Powering Up the Switch, page 3-21

Starting the Terminal-Emulation Software

Before you power-up the switch, start the terminal-emulation session so that you can see the output display from the power-on self-test (POST).

The terminal-emulation software, which is frequently a PC application such as Hyperterminal or ProcommPlus, makes communication between the switch and your PC or terminal possible.

To start the terminal-emulation software, follow these steps:

Step 1 Start the terminal-emulation program if you are using a PC or terminal. Step 2 Start a terminal-emulation session.

Powering Up the Switch

Step 3 Configure the baud rate and character format of the PC or terminal to match these console port default

characteristics:

• 9600 baud

• 8 data bits

• 1 stop bit

• No parity

• None (flow control)

Powering Up the Switch

If your chassis has AC-input power supplies installed, follow these steps to power up the chassis:

Step 1 Switch the power supply power switches to the ON position. Step 2 Verify power supplies are operating correctly by looking at the INPUT OK and the OUTPUT OK LEDs

located on the power supply faceplate. The LEDs should be green when the power supply and the power supply fan are functioning normally.

Also verify that the front panel PS1 LED is lit green. If the chassis is equipped with a second (redundant) power supply, verify that the front panel PS2 LED is also lit green. If the LEDs are not green, refer to the

“300 W AC-Input Power Supply (PWR-C49E-300AC-R)” section on page A-1 or “300 W AC-Input

Power Supply (PWR-C49E-300AC-F)” section on page A-5 for additional LED descriptions.

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3-21

Powering Up the Switch

Step 1 Verify that the terminal block cover is installed on the power supply correctly and that no bare wires are

Step 2 Remove any safety flag and lockout devices or any tape from the source DC circuit breaker switch

Step 3 Verify power supplies are operating correctly by looking at the INPUT OK and the OUTPUT OK LEDs

Step 4 Also verify that the front panel PS1 LED is lit green. If the chassis is equipped with a second (redundant)

Chapter 3 Installing the Switch

If your chassis has DC-input power supplies installed, follow these steps to power up the chassis:

exposed.

handle, and restore source DC power by moving the circuit breaker switch handle to the on (|) position.

Note The DC-input power supply does not have an on/off switch. Restoring source DC power will

energize the Catalyst 4948E DC-input power supply and power up the chassis.

located on the power supply faceplate. The LEDs should be green when the power supply and the power supply fan are functioning normally.

power supply, verify that the front panel PS2 LED is also lit green. If the LEDs are not green, refer to the

“300 W DC-Input Power Supply (PWR-C49-300DC)” section on page A-12 for LED descriptions.

As the switch powers on, it begins the POST, which are a series of tests that run automatically to ensure that the switch functions properly. The POST lasts approximately 1

minute. After the POST is complete,

the SYSTEM LED should be green. If the switch fails the POST, the SYSTEM LED turns amber.

The port status LEDs on the switch also cycle through several colors during power up.

• The LED turns amber while the STP feature discovers the network topology and searches for loops.

This process takes about 30 seconds, and then the LED turns green.

• The LED turns green when the chassis port and the target device have an established link.

• If the LED is off, the target device might not be turned on, there might be a cable problem, or there

might be a problem with the target device.

Note The POST failures are usually fatal. Call Cisco Systems if your switch does not pass the POST.

For information on configuring the Catalyst 4948E or the Catalyst 4948E-F switch, refer to the appropriate software configuration guide at:

http://www.cisco.com/en/US/products/ps6021/products_installation_and_configuration_guides_list.ht ml

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CHAP T ER

Removal and Replacement Procedures

This chapter describes how to perform the following removal and replacement procedures for the Catalyst sections:

• Removing and Installing the DC-Input Power Supply, page 4-2

• Removing and Installing the AC-Input Power Supply, page 4-8

• Removing and Installing the Fan Tray, page 4-10

4948E and the Catalyst 4948E-F switch field-replaceable units (FRUs) and contains these

Warning

Tip For additional information about the Cisco Catalyst 4948E switch (including configuration examples

Ta b l e 4-1 Catalyst 4948E and Catalyst 4948E-F Chassis FRUs

FRU Catalyst 4948E Catalyst 4948E-F

Fan tray WS-X4993 WS-X4993-F

Power supply AC-input—PWR-C49E-300AC-R

Blank power supply cover WS-X4994 WS-X4994-F

Only trained and qualified personnel should be allowed to install, replace, or service this equipment.

Statement 1030

and troubleshooting information), see the documents listed on this page:

http://www.cisco.com/en/US/products/ps6021/tsd_products_support_series_home.html

The chassis FRUs and their associated part numbers are listed in Table 4-1.

AC-input—PWR-C49E-300AC-F

DC-input—PWR-C49-300DC

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4-1

Chapter 4 Removal and Replacement Procedures

Removing and Installing the DC-Input Power Supply

This section describes how to remove and install the DC-input power supplies (PWR-C49-300DC) in the Catalyst

• Required Tools, page 4-2

• Removing the DC-Input Power Supply, page 4-2

• Installing the DC-Input Power Supply, page 4-5

Note The Catalyst 4948E-F chassis does not support the PWR-C49-300DC DC-input power supply.

Caution Installation of the equipment must comply with local and national electrical codes.

Caution Ensure that the DC return remains isolated from the system frame and the chassis (DC-I).

4948E switch chassis and contains these subsections:

Note You can use the grounding lug to attach a wrist strap for ESD protection during servicing.

Warning

Before performing any of the following procedures, ensure that power is removed from the DC circuits. To ensure that all power is removed, locate the circuit breakers or fuses on the DC power lines that service the DC circuits. Turn OFF the DC power line circuit breakers and remove the DC power line fuses.

When installing or replacing the unit, the ground connection must always be made first and disconnected last.

Statement 322

Statement 1046

Required Tools

To perform this procedure, you will need a Number 2 Phillips screwdriver.

Removing the DC-Input Power Supply

To remove a DC-input power supply, follow these steps:

4-2

Step 1 Set the power switch/circuit breaker to the off (0) position on the circuit that feeds the power supply that

you are removing.

As an added precaution, place the appropriate safety flag and lockout devices at the source power circuit breaker, or place a piece of adhesive tape over the circuit breaker handle to prevent accidental power restoration while you are working on the circuit.

Step 2 Remove the clear plastic terminal block cover from the power supply terminal block.

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Chapter 4 Removal and Replacement Procedures

Step 3 Disconnect the DC-input cables from the power supply terminal block in this order (See Figure 4-1, top

view):

1. Positive (+) source DC cable from the positive (+) terminal

2. Negative (–) source DC cable from the negative (–) terminal

3. Ground cable from the ground terminal Step 4 Loosen the captive installation screw on the power supply. Step 5 Grasp the power supply handle with one hand, and slide the power supply halfway out of the chassis.

Place your other hand underneath the power supply, as shown in power supply completely out of the chassis. Set the power supply aside.

Note The DC power supply is equipped with an EMI gasket on the top and bottom (on the front edge)

of the power supply. When sliding the power supply into or out of the power supply bay, be careful not to damage the EMI gaskets.

Step 6 If the power supply bay is to remain empty, install a blank faceplate (WS-X4994) over the opening, and

secure it in place with the captive installation screw.

Removing and Installing the DC-Input Power Supply

Figure 4-1 (bottom view), and slide the

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4-3

Removing and Installing the DC-Input Power Supply

Figure 4-1 Removing the DC-Input Power Supply

Chapter 4 Removal and Replacement Procedures

PWR - C49-300DC

-48 To -60VAC 8A

INPUT

OUTPUT

PWR - C49-300DC

-48 To -60VAC 8A

INPUT

OUTPUT

PWR - C49-300DC

-48 To -60VAC 8A

INPUT

OUTPUT

PWR - C49-300DC

-48 To -60VAC 8A

INPUT

OUTPUT

1 Detach the power leads from the terminal block in the

following order:

278171

2 Loosen captive installation screw

• (+) positive

• (–) negative

• Ground

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Chapter 4 Removal and Replacement Procedures

Installing the DC-Input Power Supply

Removing and Installing the DC-Input Power Supply

Warning

When installing or replacing the unit, the ground connection must always be made first and disconnected last.

Statement 322

Statement 1046

To install a DC-input power supply in the Catalyst 4948E switch, follow these steps:

Step 1 Ensure that the system (earth) ground chassis connection has been made. Step 2 Verify that power is off to the DC circuit that feeds the power supply that you are installing.

Step 3 Remove the new DC-input power supply from its protective packaging. Step 4 Grasp the power supply handle with one hand, and place your other hand underneath the power supply.

Slide the power supply into the power supply bay until the power supply makes contact with the chassis power connector. (See

Figure 4-2.) Press firmly on the power supply faceplate to fully seat the power

supply in the bay.

Note The DC power supply is equipped with an EMI gasket on the top, bottom, and sides (on the front

edge) of the power supply. When sliding the power supply into the power supply bay, be careful not to damage the EMI gaskets.

Step 5 Tighten the power supply captive installation screw. Step 6 Remove the plastic cover from the terminal block. Step 7 Attach the appropriate lugs to the source DC wires.

Note The wire should be sized according to local and national installation requirements and electrical

codes. Use only copper wire.

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4-5

Removing and Installing the DC-Input Power Supply

Step 8 Connect the DC-input wires to the terminal block in this order:

1. Ground cable to the ground connector on the terminal block

2. Negative (–) source DC cable to the negative (–) connector on the terminal block

3. Positive (+) source DC cable to the positive (+) connector on the terminal block

Step 9 After ensuring that all wire connections are secure, reinstall the plastic terminal block cover.

Caution To prevent a short circuit or shock hazard after wiring the DC-input power supply, you must reinstall the

terminal block cover.

Note In a system with dual power supplies, connect each power supply to a separate power source. In

case of a power source failure to one supply, the second power source should still be available.

Step 10 Remove any safety flag and lockout devices or any tape from the circuit breaker switch handle, and

restore power by moving the circuit breaker switch handle to the on (|) position.

Step 11 Verify the power supply operation by ensuring that the INPUT OK and the OUTPUT OK LEDs on the

power supply front panel are both green.

Chapter 4 Removal and Replacement Procedures

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Chapter 4 Removal and Replacement Procedures

278172

INPUT

OUTPUT

PWR - C49-300DC

-48 To -60VAC 8A

INPUT OK

OUTPUT

PWR - C49-300DC

-48 To -60VAC 8A

INPUT

OUTPUT

PWR - C49-300DC

-48 To -60VAC 8A

INPUT

OUTPUT

PWR - C49-300DC

-48 To -60VAC 8A

Figure 4-2 Installing the DC-Input Power Supply

Removing and Installing the DC-Input Power Supply

1 Secure the power supply in the chassis with the captive

installation screw.

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2 Attach the source DC leads to the terminal block in the

following order:

• Ground

• (–) negative

• (+) positive

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

4-7

Chapter 4 Removal and Replacement Procedures

Removing and Installing the AC-Input Power Supply

This section describes how to remove and install the AC-input power supply (PWR-C49E-300AC-R) in the Catalyst 4948E-F switch chassis and contains the following subsections:

• Required Tools, page 4-8

• Removing the AC-Input Power Supply, page 4-8

• Installing the AC-Input Power Supply, page 4-9

Note The two models of AC-input power supplies are not interchangeable between the two chassis. They are

keyed to prevent accidental insertion into the wrong chassis.

Required Tools

You might need a Number 2 Phillips screwdriver to loosen or tighten the captive installation screw.

4948E switch chassis or the AC-input power supply (PWR-C49E-300AC-F) in the Catalyst

Removing the AC-Input Power Supply

Note If you have a Catalyst 4948E-F switch chassis and you have also installed the optional Panduit ToR

Switch Inlet Duct (model CDE2) to extend the chassis’s air intake, you do not need to remove the air duct or the switch chassis in order to remove and replace the AC-input power supply. There is adequate working space within the air duct to perform the removal and replacement steps.

To remove the AC-input power supply from the chassis, follow these steps:

Step 1 Set the power switch to the off (0) position on the power supply that you are removing. Step 2 Disconnect the AC power cord from source AC and from the AC-in connector on the power supply. Set

the power cord aside.

Step 3 Loosen the captive installation screw on the power supply. Step 4 Grasp the power supply handle with one hand, and slide the power supply halfway out of the chassis.

Place your other hand underneath the power supply chassis. (See Figure 4-3.) Set the power supply aside.

Note The AC power supply is equipped with an EMI gasket on the top, bottom, and sides (on the front

edge) of the power supply. When sliding the power supply into or out of the power supply bay, be careful not to damage the EMI gaskets.

and slide the power supply completely out of the

4-8

Step 5 If the power supply bay is to remain empty, install a blank faceplate (WS-X4994= for the Catalyst 4948E

or WS-X4994-F= for the Catalyst installation screw.

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

4948E-F) over the opening, and secure it in place with the captive

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Chapter 4 Removal and Replacement Procedures

Figure 4-3 Removing and Installing an AC-Input Power Supply

Removing and Installing the AC-Input Power Supply

PWR - 540 AC

100 - 240 VAC

7 - 3A

50 - 60 Hz

INPUT

OUTPUT

PWR - 540 AC

100 - 240 VAC

7 - 3A

50 - 60 Hz

INPUT

OUTPUT

278173

Installing the AC-Input Power Supply

Note If you have a Catalyst 4948E-F switch chassis and you have also installed the optional Panduit ToR

To install an AC-input power supply in the chassis, follow these steps:

Step 1 Remove the new AC-input power supply from its protective packaging and set the packaging aside. Step 2 Loosen the two captive installation screws and remove the blank faceplate (WS-X4994= for the

Catalyst opening. Save the blank faceplate for possible future use.

Step 3 Verify that the power switch is in the off (0) position on the power supply that you are installing.

Note If the power supply is connected to source AC with the power on/off switch in the on position,

Step 4 Grasp the power supply handle with one hand, and place your other hand underneath the power supply.

Slide the power supply into the power supply bay. Make sure that the power supply is fully seated in the power supply bay.

4948E or WS-X4994-F= for the Catalyst 4948E-F) covering the empty power supply bay

the two LEDs on the power supply faceplate will be lit red. To clear this condition, cycle the power on/off switch off, then on. The LEDs should then be lit green.

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Note The AC power supply is equipped with an EMI gasket on the top and the bottom front edge of

the power supply. When sliding the power supply into the power supply bay, be careful not to damage the EMI gaskets.

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

4-9

Removing and Installing the Fan Tray

Step 5 Tighten the power supply captive installation screw. Step 6 Plug the AC power cord appliance connector (C15 or C13 connector) into the AC-in receptacle on the

power supply.

Step 7 Plug the other end of the AC power cord into the source AC outlet. Step 8 Switch the power supply on/off switch to on.

Verify the power supply operation by ensuring that the corresponding power supply LED (PS1 or PS2) on the chassis front panel is lit green. Also check the LEDs on the power supply front panel. Both LEDs (INPUT OK and OUTPUT OK) should be lit green.

As an added check, verify that you can hear the power supply fan operating.

Removing and Installing the Fan Tray

This section describes how to remove and install the system fan tray (WS-X4993=) in the Catalyst 4948E switch chassis and contains these subsections:

Chapter 4 Removal and Replacement Procedures

• Required Tools, page 4-10

• Removing the Fan Tray, page 4-10

• Installing the Fan Tray, page 4-11

Required Tools

You might need a flat-blade or Number 2 Phillips screwdriver to loosen or tighten the captive installation screw on the fan tray.

Removing the Fan Tray

The system fan tray (WS-X4993=) can be removed and replaced while the system is operating without presenting an electrical hazard to the user or damage to the system. A 30-second window is provided for you to remove the defective fan tray and install the replacement tray. If you exceed 30 seconds, the system starts to overheat and automatically shuts down.

Note If you have a Catalyst 4948E-F switch chassis and you have also installed the optional Panduit ToR

Switch Inlet Duct (model CDE2) to extend the chassis’s air intake, you do not need to remove the air duct or the switch chassis in order to remove and replace the fan tray. There is adequate working space within the air duct to perform the removal and replacement steps.

4-10

Warning

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

When removing the fan tray, keep your hands and fingers away from the spinning fan blades. Let the fan blades completely stop before you remove the fan tray.

To remove the installed fan assembly, follow these steps:

Statement 258

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Chapter 4 Removal and Replacement Procedures

Step 1 Remove the replacement fan tray from its shipping packaging and place it near the chassis that you are

working on.

Step 2 Loosen the two captive installation screws on the installed fan tray. Step 3 Grasp the fan assembly handle, and pull it outward; gently move the fan tray from side to side, if

necessary, to unseat the fan tray power connector from the chassis connector. (See

Step 4 Place your free hand under the fan tray to support it. Pull the fan assembly clear of the chassis, and set

it aside. (See

Figure 4-4 Removing and Installing the Fan Tray

Figure 4-4.)

PWR - 540 AC

100 - 240 VAC

7 - 3A

50 - 60 Hz

INPUT

OUTPUT

Removing and Installing the Fan Tray

Figure 4-4.)

PWR - 540 AC

100 - 240 VAC

7 - 3A

50 - 60 Hz

INPUT

OUTPUT

278174

Installing the Fan Tray

Note You have 30 seconds to install the replacement fan tray before the system automatically shuts down.

To install the new fan tray, follow these steps:

Step 1 Position the replacement fan tray in front of the fan tray bay at the rear of the chassis. (See Figure 4-4.) Step 2 Slide the fan tray into the fan tray bay until the power connector seats in the chassis fan connector and

the captive installation screws make contact with the chassis. The fans should immediately power up.

Step 3 Tighten the two fan tray captive installation screws to secure the fan tray in the chassis. Step 4 Verify that the FAN LED on the chassis front panel is lit green.

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Removing and Installing the Fan Tray

Chapter 4 Removal and Replacement Procedures

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APPENDIX

Power Supply Specifications

This appendix provides the specifications for the AC-input and DC-input power supplies supported on the Catalyst

Tip For additional information about the Cisco Catalyst 4948E and the Catalyst 4948E-F switches (including

configuration examples and troubleshooting information), see the documents listed on this page:

http://www.cisco.com/en/US/products/ps6021/tsd_products_support_series_home.html

300 W AC-Input Power Supply (PWR-C49E-300AC-R)

The PWR-C49E-300AC-R 300 W AC-input power supply can be installed only in the Catalyst 4948E switch chassis. This power supply is not supported on the Catalyst the 300 W AC-input power supply with the major features identified.

4948E switch.

4948E-F switch. Figure A-1 shows

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A-1

300 W AC-Input Power Supply (PWR-C49E-300AC-R)

196260

PWR-C49E-300AC-R

Figure A-1 AC-Input Power Supply (PWR-C49E-300AC-R) Features

Appendix A Power Supply Specifications

1 AC power switch 4 Power supply LEDs 2 Captive installation screw 5 Power supply handle 3 AC power cord receptacle

A-2

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Appendix A Power Supply Specifications

Table A-1 lists the specifications for the 300 W AC-input power supply (PWR-C49E-300AC-R).

Ta b l e A-1 300 W AC-Input Power Supply Specifications

Item Specification

AC-input type • Autoranging input with power factor correction (PFC).

AC-input voltage • Low-line (120 VAC nominal)—85 VAC (min) to 132 VA C

AC-input current • 4 A @ 100 VAC (maximum)

AC-input frequency 47 to 63 Hz

Branch circuit requirements Each chassis power supply should have its own dedicated,

300 W AC-Input Power Supply (PWR-C49E-300AC-R)

• Power factor correction is a standard feature. PFC reduces the

reactive component in the source AC current allowing higher power factors and lower harmonic current components.

(max)

• High-line (230 VAC nominal)—170 VAC (min) to 264 VA C

(max)

• 2 A @ 240 VAC (maximum)

fused-branch circuit:

• For North America—15 A

• For International—Circuits sized to local and national codes

• All AC power supply inputs are fully isolated.

–

Source AC can be out of phase between multiple power supplies in the same chassis, which means that PS1 can be operating from phase phase

–

For high-line operation, the power supply operates with the

A and PS2 can be operating from

line conductor wired to a source AC phase and the neutral conductor wired either to neutral or to another source AC phase as long as the net input voltage is in the range of 170 to 264

VA C .

Power supply output 25 A @+12 VDC

Output holdup time 20 ms minimum

kVA rating

0.375 kVA

Power supply fan • One temperature-controlled, variable-speed fan

• Airflow direction—Back to front

• The power supply fan has four speed settings. The speed

settings are dependent on the air temperature detected by the inlet air temperature sensor mounted in the chassis. See

Table A-2 for inlet temperature ranges and corresponding fan

speeds.

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A-3

300 W AC-Input Power Supply (PWR-C49E-300AC-R)

Table A-1 300 W AC-Input Power Supply Specifications (continued)

Item Specification

Power supply LEDs

INPUT OK • Green—The INPUT OK LED is lit green when the power

OUTPUT OK • Green—The 12 VDC output is within margins

Appendix A Power Supply Specifications

supply has detected that the source AC voltage is within limits. The input voltage is ≥

• Red—The INPUT OK LED is red when either of the following

82 VA C ±3 VA C .

two situations occurs:

–

In chassis that are equipped with dual power supplies, and both are powered on, either INPUT OK LED is lit red if its source AC voltage falls below 73

–

In chassis that are equipped with dual power supplies and

VA C (±3 VA C ) .

one power supply is powered on and the other power supply is powered off, the INPUT OK LED is lit red, rather than unlit, on the power supply that is turned off.

• Off—In chassis that are equipped with a single power supply,

the INPUT OK LED is off when source AC voltage falls below 73

VA C (±3 VAC), is not present with the power on/off switch

turned on, or the power supply is turned off.

(11.30

VDC < output voltage < 12.85 VDC).

• Red—The OUTPUT OK LED is red when any of the following

three situations occurs:

–

In chassis that are equipped with a single power supply, the 12

VDC output is out of tolerance (< 11.30 VDC or

12.85 VDC).

–

In chassis that are equipped with dual power supplies and one power supply is powered on and the other power supply is powered off, the OUTPUT OK LED is lit red, rather than unlit, on the power supply that is turned off.

–

The OUTPUT OK LED is also lit red when a power supply fan failure is detected. A fan failure is triggered when the fan rotation drops below 4150

• Off—In chassis that are equipped with a single power supply,

RPM ± 150 RPM.

the OUTPUT OK LED is off when the power supply is turned off.

Weight 2 lb (0.9 kg)

1. The kVA rating listed for the power supply should be used as the sizing criteria for both UPS outputs as well as standard circuits and transformers to power a switch.

A-4

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Appendix A Power Supply Specifications

Ta b l e A-2 PWR-C49E-300AC-R Power Supply Inlet Temperature Versus Fan Speed

300 W AC-Input Power Supply (PWR-C49E-300AC-F)

Fan Speed Level

Inlet Temperature (T) (± 2°C)

Fan Speed (RPM) (±100RPM)

L1 –5°C < T ≤ 35°C 8900

L2 35°C < T ≤ 42°C 9800

L3 42°C < T ≤ 50°C) 11100

L4 T > 50°C 12700

300 W AC-Input Power Supply (PWR-C49E-300AC-F)

The PWR-C49E-300AC-F 300 W AC-input power supply can be installed only in the Catalyst 4948E-F switch chassis. This power supply is not supported on the Catalyst 300 W AC-input power supply with the major features identified.

Figure A-2 AC-Input Power Supply (PWR-C49E-300AC-F) Features

4948E switch. Figure A-2 shows the

196260

PWR-C49E-300AC-F

1 AC power switch 4 Power supply LEDs 2 Captive installation screw 5 Power supply handle 3 AC power cord receptacle

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A-5

300 W AC-Input Power Supply (PWR-C49E-300AC-F)

Table A-1 lists the specifications for the 300 W AC-input power supply (PWR-C49E-300AC-F).

Ta b l e A-3 300 W AC-Input Power Supply (PWR-C49E-300AC-F) Specifications

Item Specification

AC-input type • Autoranging input with power factor correction (PFC).

AC-input voltage • Low-line (120 VAC nominal)—85 VAC (min) to 132 VAC

AC-input current • 4 A @ 100 VAC (maximum)

AC-input frequency 47 to 63 Hz

Branch circuit requirements Each chassis power supply should have its own dedicated,

Appendix A Power Supply Specifications

• Power factor correction is a standard feature. PFC reduces the

reactive component in the source AC current allowing higher power factors and lower harmonic current components.

(max)

• High-line (230 VAC nominal)—170 VAC (min) to 264 VA C

(max)

• 2 A @ 240 VAC (maximum)

fused-branch circuit:

• For North America—15 A

• For International—Circuits sized to local and national codes

• All AC power supply inputs are fully isolated.

–

Source AC can be out of phase between multiple power supplies in the same chassis, which means that PS1 can be operating from phase phase

–

For high-line operation, the power supply operates with the

A and PS2 can be operating from

line conductor wired to a source AC phase and the neutral conductor wired either to neutral or to another source AC phase as long as the net input voltage is in the range of 170 to 264

VA C .

Power supply output 25 A @+12 VDC

Output holdup time 20 ms minimum

kVA rating

0.4 kVA

Power supply fan • One temperature-controlled, variable-speed fan

• Airflow direction—Front to back

• The power supply fan has four speed settings. The speed

settings are dependent on the air temperature detected by the inlet air temperature sensor mounted in the chassis. See

Table A-4 for inlet temperature ranges and corresponding fan

speeds.

A-6

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Appendix A Power Supply Specifications

Table A-3 300 W AC-Input Power Supply (PWR-C49E-300AC-F) Specifications (continued)

Item Specification

Power supply LEDs

INPUT OK • Green—The INPUT OK LED is lit green when the power

OUTPUT OK • Green—The 12 VDC output is within margins

300 W AC-Input Power Supply (PWR-C49E-300AC-F)

supply has detected that the source AC voltage is within limits. The input voltage is ≥

• Red—The INPUT OK LED is red when either of the following

82 VA C ±3 VA C .

two situations occurs:

–

In chassis that are equipped with dual power supplies, and both are powered on, either INPUT OK LED is lit red if its source AC voltage falls below 73

–

In chassis that are equipped with dual power supplies and

VA C (±3 VA C ) .

one power supply is powered on and the other power supply is powered off, the INPUT OK LED is lit red, rather than unlit, on the power supply that is turned off.

• Off—In chassis that are equipped with a single power supply,

the INPUT OK LED is off when source AC voltage falls below 73

VA C (±3 VAC), is not present with the power on/off switch

turned on, or the power supply is turned off.

(11.30

VDC < output voltage < 12.85 VDC).

• Red—The OUTPUT OK LED is red when any of the following

three situations occurs:

–

In chassis that are equipped with a single power supply, the 12

VDC output is out of tolerance (< 11.30 VDC or

12.85 VDC).

–

The OUTPUT OK LED is also lit red when a power supply fan failure is detected. A fan failure is triggered when the fan rotation drops below 7047

• Off—In chassis that are equipped with a single power supply,

RPM ± 150 RPM.

the OUTPUT OK LED is off when the power supply is turned off.

Weight 2 lb (0.9 kg)

1. The kVA rating listed for the power supply should be used as the sizing criteria for both UPS outputs as well as standard circuits and transformers to power a switch.

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A-7

300 W AC-Input Power Supply Power Cords

Ta b l e A-4 PWR-C49E-300AC-F Power Supply Inlet Temperature Versus Fan Speed

Appendix A Power Supply Specifications

Fan Speed Level

Inlet Temperature (T) (± 2°C)

Fan Speed (RPM) (±100RPM)

L1 –3°C < T ≤ 37°C 8700

L2 37°C < T ≤ 44°C 10700

L3 44°C < T ≤ 52°C 12700

L4 T > 52°C 14700

300 W AC-Input Power Supply Power Cords

Table A-5 lists the specifications for the AC power cords that are available for both of the 300 W

AC-input power supplies. The table includes references to illustrations of the AC power cords.

Note All 300 W AC-input power supply power cords have an IEC60320/C15 appliance plug at one end. This

plug connects to the AC-in receptacle on the power supply faceplate.

Ta b l e A-5 300 W AC-Input Power Supply Power Cords

Locale Power Cord Part Number AC Source Plug

Ty pe

Argentina CAB-IR2073-C15-AR=

IRAM 2073 10 A, 250 VA C Figure A-3

Cordset Rating Power Cord Reference

Illustration

(was CAB-7KACR=)

Australia, New Zealand CAB-AS3112-C15-AU=

SAA AS 3112 10 A, 250 VA C Figure A-4

(was CAB-7KACA=)

Continental Europe CAB-CEE77-C15-EU=

CEE 7/7 10 A, 250 VA C Figure A-5

(was CAB-7KACE=)

Italy CAB-C2316-C15-IT=

CEI 23-16/7 10 A, 250 VA C Figure A-6

(was CAB-7KACI=)

North America, Japan CAB-US515-C15-US=

NEMA 5-15

13 A, 125 VA C Figure A-7

(was CAB-7KAC=)

North America CAB-N5K6A-NA= NEMA 6-15P 10 A, 250 VA C Figure A-8

South Africa, India CAB-SABS-C15-IND= BS 546

10 A, 250 VA C Figure A-9

(SABS 164-1)

Switzerland CAB-9K10A-SW=

SEV 1011 10 A, 250 VA C Figure A-10

(was CAB-7KACSW=)

United Kingdom CAB-BS1363-C15-UK=

BS 1363

13 A, 250 VA C Figure A-11

(was CAB-7KACU=)

1. For Japan, ask your local electrical contractor to prepare the NEMA 5-20 power plug.

2. Plug contains a 13 A fuse.

A-8

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Appendix A Power Supply Specifications

Plug: IRAM 2073

Cordset rating: 10 A, 250 V

Length: 8 ft 2 in. (2.5 m)

113346

Connector: IEC 60320 C15

Cordset rating: 10 A, 250 V

Length: 8 ft 2 in. (2.5 m)

Plug: SAA AS 3112

113347

Connector:

VSCC15

Cordset rating: 10A/16 A, 250 V

Length: 8 ft 2 in. (2.5 m)

Plug:

M2511

Figure A-3 CAB-IR2073-C15-AR=, CAB-7KACR= (Argentina)

Figure A-4 CAB-AS3112-C15-AU=, CAB-7KACA= (Australia and New Zealand)

300 W AC-Input Power Supply Power Cords

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Figure A-5 CAB-CEE77-C15-EU=, CAB-7KACE= (Continental Europe)

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

A-9

300 W AC-Input Power Supply Power Cords

Plug: CEI 23-16/7

Cordset rating: 10 A, 250 V

Length: 8 ft 2 in. (2.5 m)

Connector: IEC 60320 C15

Connector:

IEC60320/C15

Cordset rating 13A, 125V

(8.2 feet) (2.5m)

Plug:

NEMA 5-15P

Cordset rating: 10 A, 250 V

Length: 8.2 ft

Plug: NEMA 6-15P

Connector:

IEC60320/C13

Figure A-6 CAB-C2316-C15-IT=, CAB-7KACI= (Italy)

Figure A-7 CAB-US515-C15-US=, CAB-7KAC= (North America)

Appendix A Power Supply Specifications

A-10

Figure A-8 CAB-N5K6A-NA (North America)

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

OL-21561-02

Appendix A Power Supply Specifications

Plug:

MP232-R

Cordset rating: 10 A, 250 V

Length: 8 ft. 2 in (2.5 m)

Connector:

IEC 60320 C15

Cordset rating: 10 A, 250 V

Length: 8 ft 2 in. (2.5 m)

Connector: IEC 60320 C15

Plug: BS 1363

13A fuse

Figure A-9 CAB-SABS-C15-IND (South Africa, India)

Plug: BS 546

(SABS 164-1)

Figure A-10 CAB-9K10A-SW=, CAB-7KACSW= (Switzerland)

300 W AC-Input Power Supply Power Cords

Cordset rating 10A, 250V

6 ft . 0 in (1.83 m)

Connect or: IEC 60320 C15

196271

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Figure A-11 CAB-BS1363-C15-UK=, CAB-7KACU= (United Kingdom)

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

A-11

Appendix A Power Supply Specifications

300 W DC-Input Power Supply (PWR-C49-300DC)

Figure A-12 shows the 300 W DC-input power supply with the major features identified. The

PWR-C49-300DC DC-input power supply is supported only on the Catalyst 4948E switch chassis.

Figure A-12 300 W DC-Input Power Supply (PWR-C49-300DC)

196261

PWR-C49-300DC

1 Source DC terminal block 3 Power supply LEDs 2 Captive installation screw 4 Power supply handle

Table A-6 lists the specifications for the 300 W DC-input power supply (PWR-C49-300DC).

A-12

Ta b l e A-6 300 W DC-Input Power Supply Specifications

Item Specification

DC-input voltage • –48 VDC @ 8.33 A for nominal –48 V battery backup system

• –60 VDC @ 6.66 A for nominal –60 V battery backup system

DC-input current Nominal range is 6.66 A to 8.33 A

Power supply output capacity 300 W

Power supply output 25 A @ 12 VDC

Output holdup time 8 ms (minimum)

Heat dissipation 341 BTU/hour (power supply only)

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

(operating range: –40.5

(operating range: –55

VDC to –56 VDC)

VDC to –72 VDC)

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Appendix A Power Supply Specifications

Table A-6 300 W DC-Input Power Supply Specifications (continued)

Item Specification

Power supply LEDs

INPUT OK • Green—The INPUT OK LED is lit green when the power

300 W DC-Input Power Supply (PWR-C49-300DC)

supply has detected that the source DC voltage is within limits. The input voltage is ≥ –38.25

• Red—The INPUT OK LED is red when either of the following

VDC ±2.25 VDC.

two situations occurs:

–

In chassis that are equipped with dual power supplies, and both power supplies are powered on, the INPUT OK LED is lit red if its source DC voltage falls below 33 (±3

VDC).

–

In chassis that are equipped with dual power supplies and

VDC

one power supply is powered on and the other power supply is powered off, the INPUT OK LED is lit red, rather than unlit, on the power supply that is turned off.

• Off—In chassis that are equipped with a single power supply,

the INPUT OK LED is off when source DC voltage falls below 33

VDC (±3 VDC), is not present with the power on/off switch

turned on, or the power supply is turned off.

OUTPUT OK • Green—The 12 VDC output is within margins (11.30 VDC <

output voltage < 12.85

• Red—The OUTPUT OK LED is red when any of the following

VDC).

three situations occurs:

–

In chassis that are equipped with a single power supply, the 12

VDC output is out of tolerance (less than 11.30 VDC or

more than 12.85

–

In chassis that are equipped with dual power supplies and

VDC).

one power supply is powered on and the other power supply is powered off, the OUTPUT OK LED is lit red, rather than unlit, on the power supply that is powered off.

–

The OUTPUT OK LED is also lit red when a power supply fan failure is detected. A fan failure is triggered when the fan rotation drops below 4150

• Off—In chassis that are equipped with a single power supply,

RPM ±150 RPM.

the OUTPUT OK LED is off when the power supply is turned off.

Power supply fan • One temperature-controlled, variable-speed fan

• Airflow direction—Back to front

• The power supply fan has four speed settings. The speed

settings are dependent on the inlet air temperature. See

Table A-7 for inlet temperature ranges and corresponding fan

speeds.

Weight 2 lb (0.9 kg)

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A-13

300 W DC-Input Power Supply (PWR-C49-300DC)

Ta b l e A-7 DC-Input Power Supply Inlet Temperature Versus Fan Speed

Appendix A Power Supply Specifications

Fan Speed Level

Inlet Temperature (T) (± 2°C)

Fan Speed (RPM) (±100RPM)

L1 –10°C < T ≤ 30°C 5100

L2 30°C < T ≤ 37°C 6400

L3 37°C < T ≤ 45°C 7700

L4 T > 45°C 9500

A-14

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APPENDIX

Transceiver, Chassis Connectors, and Cable and Adapter Specifications

Revised: January 4, 2012

This appendix covers the transceivers supported by the Catalyst 4948E and the Catalyst 4948E-F switches, the connectors on the front panel of the chassis, and the cables and adapters supplied in the accessory kit. The appendix is divided into the following topics:

• Transceiver Support for Uplink Ports, page B-1

• Console Port, page B-11

• Ethernet Management Port, page B-12

• Cables and Adapters, page B-12

Tip For additional information about the Cisco Catalyst 4948E and the Catalyst 4948E-F switches (including

configuration examples and troubleshooting information), see the documents listed on this page:

http://www.cisco.com/en/US/products/ps6021/tsd_products_support_series_home.html

Transceiver Support for Uplink Ports

Both the Catalyst 4948E and the Catalyst 4948E-F chassis have four uplink ports that support both 1-GB SFP and 10-GB SFP+ transceivers.

1-GB SFP Transceivers

Table B-1 lists the 1-GB SFP transceivers that are supported on the chassis uplink ports.

Ta b l e B-1 1-GB SFP Transceiver Support

SFP Transceiver

GLC-T (1000BASE-T)

GLC-SX-MM (1000BASE-SX)

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Description

Catalyst 4948E an Catalyst 4948E-F Switch Installation Guide

B-1

Transceiver Support for Uplink Ports

-S

-M

Class

1 21CFR1040.10

LN#50 7/01 03-13

S/N: OH1233456

Receive optical bore

Transmit optical bore

Bail clasp

Dust plug

273166

Table B-1 1-GB SFP Transceiver Support (continued)

Appendix B Transceiver, Chassis Connectors, and Cable and Adapter Specifications

SFP

Description

Transceiver

GLC-LH-SM (1000BASE-LH/LX)

GLC-ZX-SM (1000BASE-ZX)

GLC-BX-D (1000BASE-BX10)

GLC-BX-U (1000BASE-BX10)

The four uplink ports also support 1-GB CWDM and 1-GB DWDM SFP transceivers, which are described in separate sections.

Figure B-1 shows a 1000BASE-X (optical) SFP transceiver with the major features of the transceiver

identified. Figure B-2 shows a 1000BASE-T (copper) SFP transceiver with the major features of the transceiver identified.

Figure B-1 1-GB Optical SFP Transceiver Features

Figure B-2 1-GB Copper SFP Transceiver Features

Catalyst 4948E an Catalyst 4948E-F Switch Installation Guide

B-2

OL-21561-02

Appendix B Transceiver, Chassis Connectors, and Cable and Adapter Specifications

1 RJ-45 connector 3 Bail-clasp shown in the open (unlocked)

2 Bail-clasp shown in the closed (locked)

position

Transceiver Support for Uplink Ports

position

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B-3

Appendix B Transceiver, Chassis Connectors, and Cable and Adapter Specifications

Transceiver Support for Uplink Ports

Table B-2 lists the specifications for the 1000BASE-T and 1000BASE-X SFP transceivers.

Ta b l e B-2 1000BASE-T and 1000BASE-X SFP Transceiver Specifications

SFP Transceiver Module and Product Number

1000BASE-T (GLC-T=)

Interface Connector

Nominal Wavelength

Network Cable Type

(nm)

RJ-45 — Category 5,

5e, or 6

Fiber Core Size (micron)

Modal Bandwidth (MHz/km)

Cable Distance

— — 328 ft (100 m)

UTP/FTP

1000BASE-SX (GLC-SX-MM=)

1000BASE-LX/LH (GLC-LH-SM=)

1000BASE-ZX (GLC-ZX-SM=)

1000BASE-BX10 (GLC-BX-D=)

1000BASE-BX10 (GLC-BX-U=)

1. Cable distances are based on fiber loss. Additional factors, such as the number of splices and the optical quality of the fiber, can affect cabling distances.

2. A mode-conditioning patch cord is required. Using an ordinary patch cord with MMF, 1000BASE-LX/LH SFP transceivers, and a short link distance can cause transceiver saturation, resulting in an elevated bit error rate (BER). When using the LX/LH SFP transceiver with 62.5-micron diameter MMF, you must also install a mode-conditioning patch cord between the SFP transceiver and the MMF cable on both the sending and receiving ends of the link. The mode-conditioning patch cord is required for link distances greater than 984 ft (300 m).

3. ITU-T G.652 SMF as specified by the IEEE 802.3z standard.

4. 1000BASE-ZX SFP modules can reach up to 62 miles (100 km) by using dispersion-shifted SMF or low-attenuation SMF; the actual distance depends on the fiber quality, the number of splices, and the connectors.

LC duplex 850 MMF 62.5

62.5

50.0

LC duplex 1300 MMF2

SMF

62.5

50.0

50.0 G.652

LC duplex 1550 SMF G.652

LC single 1490

SMF G.652

(downstream)

LC single 1310

SMF G.652

(upstream)

160 200 400 500

500 400 500

—

— 43.4 to 62 mi (70 to

722 ft (220 m) 902 ft (275 m) 1640 ft (500 m) 1804 ft (550 m)

1804 ft (550 m) 1804 ft (550 m) 1804 ft (550 m)

6.21 mi (10 km)

100 km)

— 6.21 mi (10 km)

B-4

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Appendix B Transceiver, Chassis Connectors, and Cable and Adapter Specifications

Table B-3 lists the fiber loss budgets for the 1000BASE-T and 1000BASE-X SFP transceivers.

Ta b l e B-3 Fiber Loss Budgets for the 1-GB SFP Transceivers

Transceiver Support for Uplink Ports

1-GB SFP Transceiver Product Number

GLC-SX-MM

(1000BASE-SX)

GLC-LH-SM

(1000BASE-LX/LH)

GLC-ZX-SM

(1000BASE-ZX)

GLC-BX-D (1000BASE-BX-D)

GLC-BX-U (1000BASE-BX-U)

Note For the GLC-ZX-SM, the minimum attenuation between the transmit bore (TX) and the receive bore

(RX) is 8

db. When using short distances of single-mode fiber cable, you might need to insert an inline

Transmit Power (dBm)

–4 (maximum)

–9.5 (minimum)

–3 (maximum)

–9.5 (minimum)

5 (maximum)

0 (minimum)

–3 (maximum)

–9 (minimum)

–3 (maximum)

–9 (minimum)

Receive Power (dBm)

0 (maximum)

–17 (minimum)

–3 (maximum)

–20 (minimum)

–3 (maximum)

–23 (minimum)

–3 (maximum)

–19.5 (minimum)

–3 (maximum)

–19.5 (minimum)

Transmit and Receive Wavelengths (nm)

770 to 860

1260 to 1355

1500 to 1580

1480 to 1500 (transmit)

1260 to 1360 (receive)

1260 to 1360 (transmit)

1480 to 1500 (receive)

optical attenuator in the link to avoid overloading the receiver.

Table B-4 lists the physical and environmental specifications for the 1-GB SFP transceivers.

Ta b l e B-4 1-GB SFP Transceiver Physical and Environmental Specifications

Item Specification

Dimensions (H x W x D) 0.04 x 0.53 x 2.22 in. (8.5 x 13.4 x 56.5 mm)

Operating temperature

Storage temperature

Note You can use any combination of SFP modules that your Cisco device supports. The only restrictions are

that each SFP port must match the wavelength specifications on the other end of the cable and that the cable must not exceed the stipulated cable length for reliable communications.

CWDM SFP Transceivers

The four uplink ports on the switches also support CWDM SFP transceivers. The CWDM SFP transceiver uses an LC optical connector to connect to single-mode fiber-optic (SMF) cable. You can connect the CWDM SFPs to CWDM passive optical system optical add/drop multiplexer (OADM) modules or multiplexer/demultiplexer plug-in modules using single-mode fiber-optic cables. The supported CWDM SFP transceivers, their associated wavelengths, and their connector color codes are listed in

Table B-5

32° to 122°F (0° to 50°C)

–40° to 185°F (–40° to 85°C)

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B-5

Transceiver Support for Uplink Ports

Ta b l e B-5 CWDM SFP Transceivers

Appendix B Transceiver, Chassis Connectors, and Cable and Adapter Specifications

CWDM SFP Transceiver

Description Connector Color Code

Product Number

CWDM-SFP-1470= 1000BASE-CWDM, 1470 nm Gray

CWDM-SFP-1490= 1000BASE-CWDM, 1490 nm Violet

CWDM-SFP-1510= 1000BASE-CWDM, 1510 nm Blue

CWDM-SFP-1530= 1000BASE-CWDM, 1530 nm Green

CWDM-SFP-1550= 1000BASE-CWDM, 1550 nm Yel lo w

CWDM-SFP-1570= 1000BASE-CWDM, 1570 nm Orange

CWDM-SFP-1590= 1000BASE-CWDM, 1590 nm Red

CWDM-SFP-1610= 1000BASE-CWDM, 1610 nm Brown

Table B-6 lists the optical specifications for the CWDM SFP transceivers.

Ta b l e B-6 CWDM SFP Optical Specifications

Parameter Minimum Typical Maximum Units Notes and Conditions

Transmitter Center Wavelength (x–4) — (x + 7) nm Available center wavelengths are 1470,

1490, 1510, 1530, 1550, 1570, 1590, and 1610 nm

Side-Mode Suppression Ratio 30 — dB

Transmitter Optical Output Power

Receiver Optical Input Power (BER <10-12 with PRBS 2-7-1)

Receiver Optical Input

0 — 5.0 dBm Average power coupled into single-mode

fiber

–28.0 — –7.0 dBm Measured at 2.12 Gbps, 140°F (60°C)

case temperature

–29.0 — –7.0 dBm Measured at 1.25 Gbps, 140°F (60°C)

case temperature

1450 — 1620 nm

Wav elen g th

Transmitter Extinction Ratio 9 — dB

Dispersion Penalty at 100 km — — 3 dB Measured at 2.12 Gbps

Dispersion Penalty at 100 km — — 2 dB Measured at 1.25 Gbps

B-6

Table B-7 lists the physical and environmental specifications for the CWDM SFP transceivers.

Ta b l e B-7 1-GB CWDMSFP Transceiver Physical and Environmental Specifications

Item Specification

Dimensions (H x W x D) 0.04 x 0.53 x 2.22 in. (8.5 x 13.4 x 56.5 mm)

Operating temperature

Storage temperature

Catalyst 4948E an Catalyst 4948E-F Switch Installation Guide

32° to 122°F (0° to 50°C)

–40° to 185°F (–40° to 85°C)

OL-21561-02

Appendix B Transceiver, Chassis Connectors, and Cable and Adapter Specifications

DWDM SFP Transceivers

The four uplink ports on both the Catalyst 4948E and the Catalyst 4948E-F switches also support DWDM SFP transceivers. The DWDM SFP transceiver uses an LC optical connector to connect to single-mode fiber-optic (SMF) cable. You can connect the DWDM SFPs to DWDM passive optical system optical add/drop multiplexer (OADM) modules or multiplexer/demultiplexer plug-in modules using single-mode fiber-optic cables. The supported CWDM SFP transceivers, their associated wavelengths, and their connector color codes are listed in

Transceiver Support for Uplink Ports

Table B-8.

Ta b l e B-8 DWDM SFP Transceiver Product Numbers, Wavelengths, and

ITU Channel Numbers

DWDM SFP

Description ITU Channel

Product Number

DWDM-SFP-6061 1000BASE-DWDM 1560.61 nm SFP 21

DWDM-SFP-5979 1000BASE-DWDM 1559.79 nm SFP 22

DWDM-SFP-5898 1000BASE-DWDM 1558.98 nm SFP 23

DWDM-SFP-5817 1000BASE-DWDM 1558.17 nm SFP 24

DWDM-SFP-5655 1000BASE-DWDM 1556.55 nm SFP 26

DWDM-SFP-5575 1000BASE-DWDM 1555.75 nm SFP 27

DWDM-SFP-5494 1000BASE-DWDM 1554.94 nm SFP 28

DWDM-SFP-5413 1000BASE-DWDM 1554.13 nm SFP 29

DWDM-SFP-5252 1000BASE-DWDM 1552.52 nm SFP 31

DWDM-SFP-5172 1000BASE-DWDM 1551.72 nm SFP 32

DWDM-SFP-5092 1000BASE-DWDM 1550.92 nm SFP 33

DWDM-SFP-5012 1000BASE-DWDM 1550.12 nm SFP 34

DWDM-SFP-4851 1000BASE-DWDM 1548.51 nm SFP 36

DWDM-SFP-4772 1000BASE-DWDM 1547.72 nm SFP 37

DWDM-SFP-4692 1000BASE-DWDM 1546.92 nm SFP 38

DWDM-SFP-4612 1000BASE-DWDM 1546.12 nm SFP 39

DWDM-SFP-4453 1000BASE-DWDM 1544.53 nm SFP 41

DWDM-SFP-4373 1000BASE-DWDM 1543.73 nm SFP 42

DWDM-SFP-4294 1000BASE-DWDM 1542.94 nm SFP 43

DWDM-SFP-4214 1000BASE-DWDM 1542.14 nm SFP 44

DWDM-SFP-4056 1000BASE-DWDM 1540.56 nm SFP 46

DWDM-SFP-3977 1000BASE-DWDM 1539.77 nm SFP 47

DWDM-SFP-3998 1000BASE-DWDM 1539.98 nm SFP 48

DWDM-SFP-3819 1000BASE-DWDM 1538.19 nm SFP 49

DWDM-SFP-3661 1000BASE-DWDM 1536.61 nm SFP 51

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Catalyst 4948E an Catalyst 4948E-F Switch Installation Guide

B-7

Transceiver Support for Uplink Ports

Appendix B Transceiver, Chassis Connectors, and Cable and Adapter Specifications

Table B-8 DWDM SFP Transceiver Product Numbers, Wavelengths, and

ITU Channel Numbers (continued)

DWDM SFP

Description ITU Channel

Product Number

DWDM-SFP-3582 1000BASE-DWDM 1535.82 nm SFP 52

DWDM-SFP-3504 1000BASE-DWDM 1535.04 nm SFP 53

DWDM-SFP-3425 1000BASE-DWDM 1534.25 nm SFP 54

DWDM-SFP-3268 1000BASE-DWDM 1532.68 nm SFP 56

DWDM-SFP-3190 1000BASE-DWDM 1531.90 nm SFP 57

DWDM-SFP-3112 1000BASE-DWDM 1531.12 nm SFP 58

DWDM-SFP-3033 1000BASE-DWDM 1530.33 nm SFP 59

Table B-9 lists the DWDM SFP transceiver optical specifications.

Ta b l e B-9 DWDM SFP Transceiver Optical Specifications

Specification Value

Transmitter spectral width 0.2 nm Transmitter optical output power • 0 dBm (minimum

• 4.0 dBm (maximum)

Receiver optical input wavelength

Receiver optical input power • –28.0 dBm (minimum)

• 1530 nm (minimum)

• 1565 nm (maximum)

• –22.0 dBm (minimum)

B-8

• –9.0 dBm (maximum)

1. Power-limited performance.

2. Noise-limited performance.

Table B-10 lists the physical and environmental specifications for the DWDM SFP transceivers.

Ta b l e B-10 DWDMSFP Transceiver Physical and Environmental Specifications

Item Specification

Dimensions (H x W x D) 0.04 x 0.53 x 2.22 in. (8.5 x 13.4 x 56.5 mm)

Operating temperature

Storage temperature

Catalyst 4948E an Catalyst 4948E-F Switch Installation Guide

32° to 122°F (0° to 50°C)

–40° to 185°F (–40° to 85°C)

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Appendix B Transceiver, Chassis Connectors, and Cable and Adapter Specifications

130927

-S

-M

Class

1 21CFR1040.10

LN#50 7/01 03-13

S/N: OH1233456

Receive optical bore

Transmit optical bore

Bail clasp

Dust plug

10-GB SFP+ Transceivers

The Small Form-Factor Pluggable, enhanced (SFP+) 10-Gigabit Ethernet transceiver module is a bidirectional transceiver. It has a 20-pin connector on the electrical interface and a duplex LC connector on the optical interface. The following SFP+ transceivers are supported in the uplink ports:

• SFP-10G-SR

• SFP-10G-LR

• SFP-10G-LRM

• SFP-H10GB-CU1M

• SFP-H10GB-CU3M

• SFP-H10GB-CU5M

Figure B-3 shows an SFP+ optical transceiver with the major features identified. Figure B-4 shows a

copper (twinax) transceiver.

Figure B-3 SFP+ Optical Transceiver

Transceiver Support for Uplink Ports

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Figure B-4 shows the SFP+ copper (twinax) transceiver.

Figure B-4 SFP+ 10-Gigabit Ethernet Copper (Twinax) Transceiver

Catalyst 4948E an Catalyst 4948E-F Switch Installation Guide

B-9

Transceiver Support for Uplink Ports

Note When switching from 1-GB SFPs to 10-GB SFP+ transceivers or from an SFP+ to an SFP, the chassis

recognizes the change in speed and sets the port accordingly.

The 10-GB SFP+ transceiver cabling specifications are listed in Tabl e B-11.

Ta b l e B-11 10-GB SFP+ Transceiver Cabling Specifications

Appendix B Transceiver, Chassis Connectors, and Cable and Adapter Specifications

SFP+ Transceiver Wavelength

Cable Type Core Size

(nm)

SFP-10G-SR

850 MMF 62.5

(Beige bail-clasp)

SFP-10G-LR

1310 SMF G.652 — 6.2 miles (10 km)

(Blue bail-clasp)

SFP-10G-LRM 1310 MMF

SMF

SFP-H10GB-CU1M — Twina x

cable, 30AWG cable assembly

SFP-H10GB-CU3M — Twina x

cable, 30AWG cable assembly

SFP-H10GB-CU5M — Twina x

cable, 30AWG cable assembly

(µm)

Modal Bandwidth

Cable Distance

(MHz/km)

62.5

50.0

62.5

50.0

G.652

160 200 400 500 2000

500 400 500

—

85 ft (26 m) 108 ft (33 m) 216 ft (66 m) 269 ft (82 m) 984 ft (300 m)

722 ft (220 m) 328 ft (100 m) 722 ft (220 m)

984 ft (300 m)

— — 3.28 ft (1 m)

— — 9.84 ft (3 m)

— — 16.4 ft (5 m)

B-10

Catalyst 4948E an Catalyst 4948E-F Switch Installation Guide

OL-21561-02

Cisco 4948E-F, 4948E User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Preface

Audience

Organization

Related Documentation

Command Syntax Conventions

Ta b l e 1 Command Syntax Guide

Obtaining Documentation and Submitting a Service Request

Product Overview

Features

Ta b l e 1-1 Catalyst 4948E and Catalyst 4948E-F Switch Features

Physical and Environmental Specifications

Ta b l e 1-3 Catalyst 4948E and Catalyst 4948E-F Switch Specifications - Acoustic Noise

Fan Tray

Ta b l e 1-4 Fan Speeds Versus Chassis Temperature Thresholds

Catalyst 4948E Fan Tray (WS-X4993=)

Figure 1-3 Catalyst 4948E Fan Tray

Figure 1-4 Catalyst 4948E Chassis Airflow

Catalyst 4948E-F Fan Tray (WS-X4993-F=)

Figure 1-5 Catalyst 4948E-F Fan Tray

Figure 1-6 Catalyst 4948E-F Chassis Airflow

Front Panel LEDs

Figure 1-7 Front Panel LEDs

Ta b l e 1-5 Front Panel LED Descriptions

Preparing for Installation

Safety

Site Requirements

Rack-Mounting Guidelines

Temperature

Air Flow

Humidity

Altitude

Dust and Particulates

Corrosion

Electromagnetic and Radio Frequency Interference

Shock and Vibration

Power Source Interruptions

System Grounding

Ta b l e 2-1 Grounding Practice Guidelines

Maintaining Safety with Electricity

Preventing Electrostatic Discharge Damage

Step 1 Attach the ESD wrist strap to bare skin as follows:

Step 3 Attach either the spring clip or the alligator clip to the ground lug screw as follows:

Power Requirements

Power Connection Guidelines for AC-Powered Systems

Power Connection Guidelines for DC-Powered Systems

Cabling Requirements

Site Preparation Checklist

Ta b l e 2-2 Site Planning Checklist

Installing the Switch

Preparing to Install the Chassis

Warnings

Verifying Package Contents

Required Tools

Lifting the Chassis Safely

Rack-Mounting the Chassis

Attaching the Rack-Mount Brackets to the Chassis

Figure 3-1 Installing the Rack-Mount Brackets

Installing the Chassis in the Rack

Figure 3-2 Installing the Chassis in the Rack

Installing the Cable Guide (Optional)

Figure 3-3 Installing the Cable Guide

Installing the Catalyst 4948E-F Switch Chassis with the Optional Panduit Air Duct Kit

Installing the System Ground

Figure 3-4 Installing the System Ground

Connecting Power to the Switch

Connecting AC Source Power to the Switch

Figure 3-5 Connecting Source AC to the AC-Input Power Supply

Connecting DC Source Power to the Switch

Step 7 Connect the source DC cable lugs to the power supply terminal block posts in this order (see Figure 3-6):

Step 8 After ensuring that all of the cable connections are secure, reinstall the terminal block cover.

Figure 3-6 Connecting Source DC to the DC-Input Power Supply (PWR-C49-300DC)

Attaching the Interface Cables

Connecting to the Downlink Ports

Step 3 Repeat Steps 1 and 2 for the remaining downlink ports.

Installing Uplink Port Transceivers and Cables

Figure 3-7 SFP Transceiver with a Mylar Tab Latch