Black Box LE7306A, LE7312A-R2, LE7312A-PS-R2 Installation & User Manual

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Installation & User Guide

“twister”

™

MEDIA CONVERTER 7000

JULY 1999

LE7306A

LE7312A-R2

LE7312A-PS-R2

Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.com

CUSTOMER

SUPPORT

INFORMATION

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Black Box and the Black Box logo are registered trademarks of Black Box Corporation. All other trademarks appearing in this manual are the property of their owners.

This publication is protected by the copyright laws of the United States and other countries, with all rights reserved. No part of this publication may be reproduced, stored in a retrieval system, translated, transcribed, or transmitted, in any form, or by any means manual, electric, electronic, electromagnetic, mechanical, chemical, optical or otherwise, without prior explicit written permission of Black Box Corporation.

The information contained in this document is assumed to be correct and current. The manufacturer is not responsible for errors or omissions and reserves the right to change specifications at any time without notice.

“twister” Media Converter 7000 Chassis:

LE7300A ____________ 17-slot 2U chassis with single fixed AC power supply LE7300A-PS _________ 16-slot 2U chassis with dual fixed AC power supplies LE7306A ____________ 6-slot 2U chassis with power supply and one 50-pin TELCO LE7312A-R2 _________ 12-slot 2U chassis with single load-sharing

capable power supply module and two 50-pin TELCO

LE7312A-PS-R2 _______12-slot 2U chassis with dual (2) load-sharing

capable power supply modules and two 50-pin TELCO

100Mbps “twister” Media Converter 7000 Modules:

LH7416C-SX-R2 ______ RJ-45 to SX multimode SC LH7416C-SXST -R2_____ RJ-45 to SX multimode ST LH7402C-TX-R2 ______ RJ-45 to Redundant TX LH7403C-MMSC-R2 ___ RJ-45 to Redundant FX multimode SC LH7404C-SMSC-R2____RJ-45 to Redundant FX singlemode SC LH7403C-MMST -R2 ___ RJ-45 to Redundant FX multimode ST LH7403C-SMST -R2 ____ RJ-45 to Redundant FX singlemode ST LH7420C-SCSC-R2 ____FX multimode SC to FX singlemode SC LH7420C-SCST -R2 ____ FX multimode SC to FX singlemode ST LH7421C-STSC-R2 ____ FX multimode ST to FX singlemode SC LH7421C-STST -R2 _____ FX multimode ST to FX singlemode ST LH7414C-R2 _________ RJ-45 to FX multimode SC LH7416C-R2 _________ RJ-45 to FX singlemode SC LH7415C-R2 _________ RJ-45 to FX multimode ST LH7416C-ST -R2 _______ RJ-45 to FX singlemode ST LH7416C-40KM-R2 ___ RJ-45 to FX singlemode SC (40km)

10Mbps “twister” Media Converter 7000 Modules:

LE7402C-TX _________ RJ-45 to Redundant RJ-45 LE7313C-R2 _________ RJ-45 to Thinnet Coax LE7313C-SC-R2 ______ RJ-45 to FL multimode SC LE7314C-R2 _________ RJ-45 to FL multimode ST LE7316C-R2 _________ RJ-45 to FL singlemode ST LE7316C-MM-R2 _____ RJ-45 to FL multimode SMA LE7302C ____________ TELCO to Dual RJ-45 LE7324C-SC _________ TELCO to Dual FL multimode SC LE7324C ____________ TELCO to Dual FL multimode ST LE7326C ____________ TELCO to Dual FL singlemode ST

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Table of Contents

“twister”™ Media Converter 7000 Installation & User Guide

Introduction ................................................................................................... 5

Product Overview........................................................................................... 5

Installation Guide .......................................................................................... 8

STEP 1: Unpacking the Chassis & Accessories ............................. 8

STEP 2: Mounting the Chassis....................................................... 8

STEP 3: Setting the Switches and Jumpers .................................. 10

STEP 4: Installing “twister” 7000 Modules ................................. 12

STEP 5: Connecting to the Network ............................................ 14

STEP 6: Applying Power to the Chassis ...................................... 14

User Guide ................................................................................................... 17

“twister” 7000 Modules ............................................................... 18

100Mbps Specifications ................................................................ 19

“redundant twister” Modules .................................................... 20

MM-to-SM FX Modules .......................................................... 22

TX-to-FX Modules ................................................................... 23

10Mbps Specifications .................................................................. 24

“redundant twister” Module ...................................................... 25

Thinnet Coaxial BNC Module .................................................. 27

Fiber Optic Modules ................................................................. 28

TELCO .................................................................................... 29

Chassis Technical Specifications.................................................. 31

Operating Features of the Power Supply...................................... 32

Power Supply Service Instructions .............................................. 33

Link Loss Carry Forward (LLCF)................................................ 35

Straight/Cross Over RJ-45 Twisted-pair Cables .......................... 36

Topology Solutions ...................................................................... 37

“redundant twister”................................................................... 37

singlemode-to-multimode ....................................................... 37

10/100 mixed environment...................................................... 38

10/100 mixed environment with stand-alone “twisters” ......... 40

TELCO modules...................................................................... 41

Product Safety, EMC and Compliance Statements ...................... 42

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“twister” Media Converter 7000 5

Overview

Introduction

Thank you f or choosing the “twister”™ Media Converter 7000.

The “twister” Media Converter provides a cost-effective means of integrating a mixed media environment. The information in this guide helps you to install and start using your “twister” Media Converter 7000.

Your “twister”™ Media Converter 7000 offers transparent media conversion and provides an effective means for integrating coax, Category 3, 4, or 5 twisted-pair and singlemode or multimode fiber optic LAN segments into either switched or shared Ethernet and Fast Ethernet environments. All “twister” solutions provide media conversion with a low bit delay. The modules reliably convert all signal activity from one cable medium to the other ensuring accurate data flow across the network.

These IEEE 802.3 and 802.3u compliant media converters are compatible with Ethernet and Fast Ethernet devices from other leading network technology providers. This increases the flexibility of network configurations by ensuring reliable data transmission in multi-vendor, as well as mixed media, environments.

Whether you are updating or expanding your existing network, the “twister”™ Media Converter 7000 supports a wide range of configuration needs. Each chassis unit supports multiple 10 and 100Mbps media types— via “twister” modules—in any combination. In addition, the “redundant twister”™ modules and dual load-sharing power supplies provide redundancy for uninterrupted network operation. While the “twister” Media Converter 7000 chassis support media conversion for any 7000 Module, only certain modules will work in conjunction with the TELCO connector on the back of these chassis. Please refer to the section in this User Guide titled “twister” 7000 Modules for a complete description of each module.

The “twister” Media Converter 7000 offers front accessible network connections for ease of installation and maintenance. For high density implementations, the units have rear-mounted 50-pin TELCO connectors that provide connection capability for up to six (6) “twister” modules each.

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The TELCO connection provides a convenient means of connecting to an MDF-ready hub, switch or patch panel.

The “twister” Media Converter 7000 offers three models with TELCO connectors. The LE7312A-PS-R2 is a 12-slot 2U chassis with dual 50-pin TELCO connectors. This chassis is available with dual load-sharing power supplies to ensure essential non-stop networking for high priority traffic and business-critical applications. The LE7312A-R2 is a 12-slot 2U chassis with a single power supply and dual 50-pin TELCO connectors. These rack-mountable models fit standard 19” equipment racks and the 2U chassis height provides housing for the maximum number of intelligent “twister” modules. The LE7306A “twister” media converter, a 6-slot 2U chassis with a single power supply and a single 50-pin TELCO connector, is designed for environments where the flexibility and functionality of a “twister” chassis is required but where a smaller number of slots are needed. This unit is available with an optional wall-mountable bracket for convenient attachment to a wall or other vertical surface.

The “twister” Media Converter 7000 provides the following key features:

• A Link Loss Carry Forward (LLCF) enable/disable switch is installed on the modules* as an aid to troubleshooting a remote connection. Refer to the section of this guide titled Link Loss Carry Forward for more information.

• An MDI-II/MDI-X switch is installed on all TP ports.

• Fused power on each module protects the rest of the modules in the chassis from a short circuit. The power (PWR) LED on an affected module does not illuminate if the fuse is blown.

• Auto polarity support on all twisted-pair ports.

• “redundant twister” modules can be configured to operate in Dynamic Recovery Mode (DRM) to ensure session integrity and increased uptime, or in Network Select Mode (NSM) to redirect traffic and add security through link isolation.

* Link Loss Carry Forward (LLCF) functionality is not provided on the LE7313C-R2 (BNC) or the LE73XXC (TELCO) modules.

** This is not applicable to the LE7302C (TELCO) module.

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“twister” Media Converter 7000 7

Related Documentation

Refer to the following documentation for additional specific information on the “twister” Media Converter 7000:

• Media Converter 7000 “redundant twister”™ Modules Installation & User Guide

• “twister”™ Media Converter 7000 Modules Quick Reference

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8 Installation Guide

Installation Guide

Follow the simple steps outlined in this section of the manual to install and start using the “twister” Media Converter 7000 chassis.

Unpack the chassis and any accessories.

Check that the following components have been included:

• “twister” Media Converter 7000 chassis

• Power Cord (one each per power supply)

• Rackmounting Hardware

The following items are available separately:

• “twister” Modules

• Wall Mount Bracket and Hardware (LE7306A)

• Blank Panels for unused chassis slots

Your order has been provided with the safest possible packaging, but shipping damage does occasionally occur. Inspect it carefully. If you discover any shipping damage, notify the carrier and follow their instructions for damage and claims. Save the original shipping carton in case return or storage of the unit is necessary.

Mount the chassis in an appropriate location.

The LE7312A-PS-R2 and LE7312A-R2 chassis are designed to be mounted in a standard 19-inch equipment rack. Use the rackmounting hardware included with the unit to secure the mounting brackets to the unit. Use the separate screws provided with the equipment rack to mount the chassis on the rack. Be sure that the mounting of the equipment in the rack does not impose a hazardous condition due to uneven mechanical loading.

Caution. Elevated ambient conditions may occur in an enclosed equipment rack or multi-rack assembly. Consideration should be taken when installing the chassis to ensure that the exhaust fan at the rear of the unit is not blocked—improper venting of the exhaust fan may cause the unit to overheat.

TUV Compliance Note. For pluggable equipment, the socket outlet must be installed near the equipment and be easily accessible. Bei Geräten mit Steckanschluß muß die Steckdose nahe dem Gerät angebracht und leicht zugänglich sein.

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“twister” Media Converter 7000 9

DISCONNECT ALL POWER

SOURCES BEFORE SERVICING

AC IN 90-250V

50/60Hz 1A

POWER ACTIVE

Use anchors with a minimum proof load of at least 50lbs.

Because of its smaller size, the LE7306A chassis can be placed on any flat surface. To save space and keep the installation area organized, use the optional wall mount bracket. Follow these simple instructions and refer to the diagram below:

• Place the bracket up against the wall and use a pencil to mark where the anchors will be placed. Be sure that the chassis will be mounted in such a way that fully exposes the front panel for access to the network and power connections and does not block the rear exhaust fan.

• Secure the bracket to the wall using anchors with a minimum proof load of 50lbs.

• Place the LE7306A inside of the bracket and secure the chassis to the bracket with the hardware provided.

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10 Installation Guide

Set the Switches and Jumpers.

Locate the switches and jumpers.

The following illustrations show the orientation of the DIP switches and LLCF jumpers for the 10Mbps and 100Mbps “twister” modules.* These illustrations are generalized and not specific to a particular module. Refer to the “redundant twister” module diagrams in the User Guide section of this document for more detailed information on the location and setting of the DIP switches for these particular modules.

RJ-45

LLCF

Jumpers

MDI-X Position

Slide Switch

JP1

3 2 1

LLCF

OFF ON

3 2 1

RJ-45

LLCF

Jumpers

Slide Switch

MDI-II Position (default)

MDI-X Position

MDI-II Position (default)

This is a generalized diagram of a “twister” 10Mbps module (with the exception of the LE7313C-R2 BNC or LE73XXC TELCO modules) and is not specific to any particular module.

This is a generalized diagram of a “twister” 100Mbps module (with the exception of the LH740XC “redundant twister” modules) and is not specific to any particular module.

* This is not applicable to the LE7313C-R2 (BNC) or the LE73XXC (TELCO) modules.

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“twister” Media Converter 7000 11

MDI-II to MDI-X

All “twister” modules with twisted-pair ports* have an MDI-II to MDI-X switch. This switch is positioned directly behind it’s associated RJ-45 connector and allows simple setup in either straight through (default) or crossover configurations.

When setting the MDI-II to MDI-X switch, observe the positioning of the following symbols:

• the parallel symbol (II) indicates a straight through or parallel connection (default)

• the cross symbol (X) indicates a crossover connection.

These symbols are clearly marked on the printed circuit board. Simply slide the switch in the direction of the appropriate symbol. Use the following table as a guide:

A device that is wired straight through, needs one crossover connection:

If the cable is…

straight through

crossover

… the MDI-II to MDI-X Switch Setting should be

A device that is wired crossover, needs a parallel connection:

If the cable is…

straight through

crossover

… the MDI-II to MDI-X Switch Setting should be

Link Loss Carry Forward (LLCF)

LLCF functionality is incorporated on all “twister” modules with the exception of the LE7313C-R2 (BNC) and LE73XXC TELCO modules. Refer to the User Guide section titled Link Loss Carry Forward for more information.

• LE731XC and LH741XC modules have a jumper for setting the LLCF. Refer to the module diagrams in the User Guide section of this document for more detailed information regarding configuration of this jumper.

• LH740XC and LE7402C-TX “redundant twister” modules have a DIP switch for setting LLCF. Refer to the “redundant twister” module diagrams in the User Guide section of this document for more detailed information regarding the location and setting of this DIP switch.

* This is not applicable to the LE7302C (TELCO) module. ** The LLCF default setting is:

disabled

. Link Loss Carry Forward (LLCF) functionality is not provided on

the LE7313C-R2 (BNC) or the LE73XXC (TELCO) modules.

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12 Installation Guide

Install the “twister” 7000 Modules.

Each chassis supports multiple 10 and 100Mbps media types— via “twister” modules—in any combination. The modules offer the ease of plug-and-play installation and are hot-swappable.

While these 7000 Series chassis support media conversion for any Media Converter Module, only certain modules will work in conjunction with the TELCO connector on the back of these chassis.* A complete listing of available “twister” modules and a short description of the supported media conversion can be found in the front of this product guide. Please refer to the section in the User Guide titled “twister” 7000 Modules for a complete description of each module.

Before installing any module, please make note of the following:

• “redundant twister” modules have a set of DIP switches located on the module board for setting user-selectable configurability options for several modes of operation. These DIP switches must be set before installing the modules in the chassis. Please refer to the section in the

“redundant twister” Media Converter 7000 Installation & User Guide titled Set the DIP Switches for

more detailed information.

• Because of the size of the “redundant twister” fiber optic modules, each TX-to-redundant FX module uses two slots in the chassis. The TX-to-redundant TX module uses only one slot.

• All “twister” modules must be firmly secured to the chassis before network connections are made.

Only the LE7302C, LE7324C-SC, LE7324C, AND LE7326C Modules will work in conjunction with the TELCO connector on the back of these chassis. Refer to the USER GUIDE section titled

10Mbps TELCO Modules

for more

detailed information.

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“twister” Media Converter 7000 13

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Card Guide

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IMPORTANT!

Tighten thumb screw

to secure each module firmly

to chassis before making

network connections.

Follow these simple steps to install “twister” modules:

• Grasp a module by the front panel as shown.

• Insert the module into a slot making sure that both the top and bottom of the card edges are lined up with the top and bottom slot guides. Do not force the module into the chassis unnecessarily. It should slide in easily and evenly.

• Slide the module in until the top and bottom edges of the front panel are flush and even with the top and bottom edges of the chassis.

• Secure the module to the chassis by turning the thumb screw clockwise until snug.

• The module is now properly installed and ready for connection to the network.

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14 Installation Guide

Connect to the Network.

To connect the individual “twister” modules to the network, refer to the appropriate section in the the User Guide section of this manual.

• For more detailed information regarding the “redundant

twister” module, refer to the Media Converter 7000

“redundant twister” Modules Installation & User Guide.

Apply power to the chassis.

The “twister” Media Converter 7000 Power Supply Module provides up to 60W of power to the chassis.

• The LE7306A is shipped with one factory-installed power supply module. This module is user replaceable. Due to the smaller chassis size, it cannot be upgraded for redundancy or load-sharing.

• The LE7312A-R2 is shipped with one factory-installed power supply module. This module is user replaceable. The chassis can also be upgraded with a second power supply for redundant non-stop operation.

• The LE7312A-PS-R2 is shipped with two factory-installed power supply modules. This redundancy capability provides essential non-stop operation to maximize network reliability and minimize network downtime. Both modules are user replaceable.

IMPORTANT

The Power Supply Module is an open frame-type power

supply — LIVE VOLTAGES ARE PRESENT — and poses

a danger if the module is installed improperly.

•

Refer to the USER GUIDE section titled

Power Supply Service Instructions

for a complete description of the procedure to follow when replacing or installing a Redundant Power Supply Module.

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“twister” Media Converter 7000 15

Each power supply includes a standard North American 3-pin power cord which is UL (USA), CSA or CUL (Canada) listed or approved. For installation in regions outside North America, replace the power cord with a cord approved by appropriate safety agencies. Any cord must have a CEE-22 standard V female connector on one end and meet IEC 320-030 specifications. European power cords must be harmonized and designated with a HAR marking on the outside of the cord jacket to comply with the CENELEC Harmonized Document HD-21

When making power connections, connect the power cord to the input jack located on the front of the chassis before making the connection to the outlet or appropriate AC voltage source. If your chassis is equipped with two power supply modules, simply connect the individual power cords to separate power sources.

Be sure the switch is set to the ON position for proper operation.

DISCONNECT ALL POWER

SOURCES BEFORE SERVICING

AC IN 90-250V

50/60Hz 1A

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Retaining Screw

Thumb Screw

ON/OFF Switch

Vent

LEDs

Power Receptacle

Caution. The fully loaded chassis is rated for 2A AC maximum current. Ensure that the supply current available is sufficient to power the chassis. Refer to front panel text for voltage/current ratings. Reliable grounding of rackmount equipment should be maintained. Particular attention should be given to power supply connections other than direct connections to the branch circuit (e.g. use of power strips).

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“twister” Media Converter 7000

User Guide

This section contains more detailed user inf ormation regarding certain operating features and maintenance instr uctions for your “twister” Media Converter 7000.

“twister” 7000 Modules

Media conversion provides a cost-effective means of integrating various types of Ethernet and Fast Ethernet LAN segments.

All “twister” modules provide media conversion with a low bit delay. All signal activity – including collision detection – is reliably propagated from one cable medium to the other ensuring accurate data flow across the network. Maximum segment lengths are supported on either side of the device. Seamless operation in half-duplex or full-duplex environments ensures interoperability with Ethernet and Fast Ethernet devices from other leading network technology providers. This increases the flexibility of network configurations by ensuring reliable data transmission in multivendor, as well as mixed media, environments.

An extensive line of plug-and-play, hot-swappable “twister” modules support 10 or 100Mbps operation and provide a variety of connector combinations for flexibility and adaptability.

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18 User Guide

“twister” Media Converter 7000 Modules:

100Mbps “twister” Modules:

LH7416C-SX-R2 ______ RJ-45 to SX multimode SC LH7416C-SXST-R2 ____ RJ-45 to SX multimode ST LH7402C-TX-R2 ______ RJ-45 to Redundant TX LH7403C-MMSC-R2___ RJ-45 to Redundant FX multimode SC LH7404C-SMSC-R2 ___ RJ-45 to Redundant FX singlemode SC LH7403C-MMST-R2 ___ RJ-45 to Redundant FX multimode ST LH7403C-SMST-R2____ RJ-45 to Redundant FX singlemode ST LH7420C-SCSC-R2 ____ FX multimode SC to FX singlemode SC LH7420C-SCST-R2 ____ FX multimode SC to FX singlemode ST LH7421C-STSC-R2 ____ FX multimode ST to FX singlemode SC LH7421C-STST-R2 ____ FX multimode ST to FX singlemode ST LH7414C-R2 _________ RJ-45 to FX multimode SC LH7416C-R2 _________ RJ-45 to FX singlemode SC LH7415C-R2 _________ RJ-45 to FX multimode ST LH7416C-ST-R2 ______ RJ-45 to FX singlemode ST LH7416C-40KM-R2 ___ RJ-45 to FX singlemode SC (40km)

10Mbps “twister” Modules:

LE7402C-TX _________ RJ-45 to Redundant RJ-45 LE7313C-R2__________ RJ-45 to Thinnet Coax LE7313C-SC-R2 ______ RJ-45 to FL multimode SC LE7314C-R2__________ RJ-45 to FL multimode ST LE7316C-R2__________ RJ-45 to FL singlemode ST LE7316C-MM-R2 _____ RJ-45 to FL multimode SMA

LE7302C ____________ TELCO to Dual RJ-45 LE7324C-SC _________ TELCO to Dual FL multimode SC LE7324C ____________ TELCO to Dual FL multimode ST LE7326C ____________ TELCO to Dual FL singlemode ST

Caution. All “twister” modules must be firmly secured to the chassis before network connections are made. Please refer to the section titled Installing “twister” 7000 Modules for instructions on the pr oper installation procedure.

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“twister” Media Converter 7000

100Mbps “twister” 7000 Modules

Specifications

Data Rate _________________________________ 100Mbps half-duplex

__________________________________ 200Mbps full-duplex

Bit Delay ____________________________________________< 40 bits

Twisted-Pair Interface

Connector _____________________________ Shielded RJ-45, 8-pin jack Impedance___________________________________ 100 Ohms nominal Signal Level Output (differential) ______________________.95 to 1.05V Signal Level Input _____________________________ 350mV minimum Supported Link Length____________________________________ 100m Cable Type ____________________________________ Category 5 UTP

Multimode Fiber Optic Interface

Connector ___________________________________________ ST or SC RX Input Sensitivity _______________________ -31 dBm peak minimum Output Power ___________________ -14 dBm to -23.5 dBm (50/125 µm)

______________________ -14 dBm to -20 dBm (62.5/125 µm)

Supported Link Length_______________________ up to 2km full duplex Cable Type ______________________50/125, 62.5/125, 100/140 µm F/O

Singlemode Fiber Optic Interface

Connector ___________________________________________ ST or SC RX Input Sensitivity _______________________ -31 dBm peak minimum Output Power ______________________ -8 dBm to -15 dBm (9/125 µm) Supported Link Length______________________ up to 15km full duplex Cable Type __________________8.3/125, 8.7/125, 9/125, 10/125 µm F/O

Singlemode Fiber Optic Interface — extended distance support

Connector ________________________________________________ SC RX Input Sensitivity ___________________________ -35 dBm minimum Output Power ________________________ 0 dBm to -5 dBm (9/125 µm) Supported Link Length______________________ up to 40km full duplex Cable Type __________________8.3/125, 8.7/125, 9/125, 10/125 µm F/O

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20 User Guide

100Mbps “redundant twister” 7000 Modules:

LH7402C-TX-R2 RJ-45 to Redundant RJ-45 ___________ 100m/100m LH7403C-MMSC-R2 RJ-45 to Redundant FX multimode SC ___ 100m/2km LH7404C-SMSC-R2 RJ-45 to Redundant FX singlemode SC __ 100m/15km LH7403C-MMST -R2 RJ-45 to Redundant FX multimode ST ___ 100m/2km LH7403C-SMST-R2 RJ-45 to Redundant FX singlemode ST __ 100m/15km

The “redundant twister” modules provide full redundant data paths for Fast Ethernet devices. The modules incorporate a MAIN port, a PRIMARY port and a SECONDAR Y port. The redundancy is provided between the PRIMAR Y and SECONDAR Y ports.

LED Operation:

• PWR: normal operation

• SW: SECONDARY port active at some point; functions in

Dynamic Recovery Mode (DRM) only

• SECONDARY: port is active (PRIMAR Y is inactive)

• (MAIN) LK: receiving valid link

• (MAIN) AT: receiving data

• (PRIMARY) LK: receiving valid link

• (PRIMARY) AT: receiving data

• (SECONDARY) LK: receiving valid link

• (SECONDARY) AT: receiving data

DIP switch* settings:

• TX Switch UP: data from the MAIN port is transmitted simultaneously on the PRIMAR Y and SECONDAR Y ports; data from the active port (PRIMAR Y or SECONDARY) is transmitted on the MAIN port.

NOTE: The Link Switch must also be in the UP position in or der to send data out the inactive port.

• TX Switch DOWN (default): data received from the MAIN port is transmitted on the active port only.

• AUTO Switch UP: the module automatically reverts back to the PRIMARY port when the primary link is re-established.

• AUTO Switch DOWN (default): once the SECONDARY port has become active, the module will not revert back to the PRIMARY port when the primary link is re-established, unless the SECONDAR Y link is absent.

• LINK Switch UP: the module sends link on both the

* When setting the DIP switches, the UP position is when the lever of the DIP switch is pushed furthest away from the circuit board. The DOWN position is when the lever of the DIP switch is pushed closest to the printed circuit board.

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“twister” Media Converter 7000

PRIMARY and SECONDARY ports; the end station connected to the module sees a valid link state.

• LINK Switch DOWN (default): the module sends link on the active port only; the end station connected to the module sees a valid link state only if the port on the module is active.

• LLCF Switch UP: Link Loss Carry Forward is enabled.

• LLCF Switch DOWN (default): Link Loss Carry Forward is disabled.

• RED Switch UP (default): redundancy is enabled; the module

functions in Dynamic Recovery Mode (DRM).

• RED Switch DOWN: redundancy is disabled; Network Select Mode (NSM) is enabled. NOTE: In this mode the reset push button toggles the

active port between A and B for each switch closure. The AUTO switch selects the initial active port on power-up: UP for SECONDAR Y; DOWN for PRIMARY. The SW LED remains OFF in NSM.

For more detailed information regarding the “redundant twister” module, refer to the section titled Setting the DIP Switches in the “redundant twister”

Media Converter 7000 Installation & User Guide.

RJ-45

DIP Switches

F/O SC (ST) F/O SC (ST)

DIP Switches

RJ-45

12345

RED

LLCF

LINK

AUTO

12345

RED

LLCF

LINK

AUTO

100 BASE

“redundant twister”

™

MAIN

RESET

LK AT

PRIMARY

LK AT

SECONDARY

LK AT

R X

T X

R X

T X

PWR

100 BASE

“redundant twister”

™

MAIN

RESET

LK AT

PRIMARY

LK AT

SECONDARY

LK AT

R X

T X

R X

T X

PWR

100 BASE

M A

N P

S E C

RESET

LK AT

SEC

PWR

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22 User Guide

100Mbps MM-to-SM “twister” 7000 Modules:

LH7420C-SCSC-R2 FX multimode SC to FX singlemode SC __ 2km/15km LH7420C-SCST -R2 FX multimode SC to FX singlemode ST __ 2km/15km LH7421C-STSC-R2 FX multimode ST to FX singlemode SC __ 2km/15km LH7421C-STST -R2 FX multimode ST to FX singlemode ST __ 2km/15km

These modules provide seamless integration between higher bandwidth singlemode and multimode fiber optic segments.

LED Operation:

• PWR: normal operation

• LK: satisfactory receive link status on respective port

• AT: receiving data

Jumper Settings: Refer to the diagram below for the location of the Link Loss Carry Forward (LLCF) jumper.

• Set the jumper to enable LLCF by connecting pins 1&2

• Set the jumper to disable LLCF by connecting pins 2&3 (default)

F/O SC (ST)

F/O ST (SC)

LLCF

3 2 1

LLCF

3 2 1

100 BASE

LK AT

PWR

T X

R X

M M

S M

T X

100 BASE

LK AT

PWR

R X

S M

T X

M M

100 BASE

LK AT

PWR

R X

S M

T X

R X

M M

T X

100 BASE

LK AT

PWR

R X

T X

M M

R X

T X

Page 23

“twister” Media Converter 7000

100Mpbs TX-to-FX “twister” 7000 Modules:

LH7416C-SX-R2 RJ-45 to SX multimode SC _________ 100m/300m LH7416C-SXST-R2 RJ-45 to SX multimode ST _________ 100m/300m LH7414C-R2 RJ-45 to FX multimode SC __________ 100m/2km LH7416C-R2 RJ-45 to FX singlemode SC ________ 100m/15km LH7415C-R2 RJ-45 to FX multimode ST __________ 100m/2km LH7416C-ST-R2 RJ-45 to FX singlemode ST ________ 100m/15km LH7416C-40KM-R2 RJ-45 to FX singlemode SC ________ 100m/40km

These modules provide transparent integration of 100BASE-TX and 100BASE-FX segments in Fast Ethernet environments.

LED Operation:

• PWR: normal operation

• LK: satisfactory receive link status on respective port

• AT: receiving data

Jumper Settings: Refer to the diagram below for the location of the Link Loss Carry Forward (LLCF) jumper .

• Set the jumper to enable LLCF by connecting pins 1&2

• Set the jumper to disable LLCF by connecting pins 2&3 (default)

RJ-45

F/O SC

RJ-45

F/O ST

LLCF

3 2 1

LLCF

3 2 1

100 BASE

LK AT

PWR

R X

T X

100 BASE

LK AT

PWR

R X

T X

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24 User Guide

10Mbps “twister” 7000 Modules

Specifications

Data Rate __________________________________ 10Mbps half-duplex

___________________________________ 20Mbps full-duplex

Bit Delay _____________________________________________< 5 bits

Twisted-Pair Interface

Connector _____________________________ Shielded RJ-45, 8-pin jack Impedance___________________________________ 100 Ohms nominal Signal Level Output __________________________________2.0 to 2.8V Signal Level Input _____________________________ 350mV minimum Supported Link Length____________________________________ 100m Cable Type _______________________________ Category 3, 4 or 5 UTP

Multimode Fiber Optic Interface

Connector _________________________________________ ST or SMA RX Input Sensitivity ___________ 10BASE-FL -32.5 dBm peak minimum Output Power _________________ -21.8 dBm to -16.8 dBm (50/125 µm)

______________________ -19 dBm to -14 dBm (62.5/125 µm)

Supported Link Length_______________________ up to 2km full duplex Cable Type ______________________50/125, 62.4/125, 100/140 µm F/O

Singlemode Fiber Optic Interface

Connector ________________________________________________ ST RX Input Sensitivity ___________ 10BASE-FL -32.5 dBm peak minimum Output Power _____________________ -17 dBm to -23 dBm (9/125 µm) Supported Link Length_______________________ up to 8km full duplex Cable Type __________________8.3/125, 8.7/125, 9/125, 10/125 µm F/O

Thinnet Coax Interface

Connector ______________________________________ BNC receptacle Internal Transceiver _________________________________ IEEE 802.3 Termination_______________________________ User Selectable Jumper Supported Link Length_______________________________ up to 185m Cable Type _________________________________ RG-58 coaxial cable

Page 25

“twister” Media Converter 7000

10Mbps “redundant twister” 7000 Module:

LE7402C-TX RJ-45 to Redundant RJ-45 _______________ 100m/100m The “redundant twister” module provides full redundant data paths for

Ethernet devices. The modules incorporate a MAIN port, a PRIMARY port and a SECONDAR Y port. The redundancy is provided between the PRIMAR Y and SECONDARY ports.

LED Operation:

• PWR: normal operation

• SW: SECONDARY port active at some point; functions in

Dynamic Recovery Mode (DRM) only

• SECONDARY: port is active (PRIMARY is inactive)

• (MAIN) LK: receiving valid link

• (MAIN) AT: receiving data

• (PRIMARY) LK: receiving valid link

• (PRIMARY) AT: receiving data

• (SECONDARY) LK: receiving valid link

• (SECONDARY) AT: receiving data

DIP switch* settings:

• TX Switch UP: data from the MAIN port is transmitted simultaneously on the PRIMAR Y and SECONDARY ports; data from the active port (PRIMAR Y or SECONDARY) is transmitted on the MAIN port.

NOTE: The Link Switch must also be in the UP position in or der to send data out the inactive port.

• TX Switch DOWN (default): data received from the MAIN port is transmitted on the active port only.

• AUTO Switch UP: the module automatically reverts back to the PRIMARY port when the primary link is re-established.

• LINK Switch UP: the module sends link on both the PRIMARY and SECONDARY ports; the end station connected to the module sees a valid link state.

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26 User Guide

• LINK Switch DOWN (default): the module sends link on the active port only; the end station connected to the module sees a valid link state only if the port on the module is active.

• LLCF Switch UP: Link Loss Carry Forward is enabled.

• LLCF Switch DOWN (default): Link Loss Carry Forward is disabled.

• RED Switch UP (default): redundancy is enabled; the module

functions in Dynamic Recovery Mode (DRM).

• RED Switch DOWN: redundancy is disabled; Network Select Mode (NSM) is enabled. NOTE: In this mode the reset push button toggles the

active port between A and B for each switch closure. The AUTO switch selects the initial active port on power-up: UP for SECONDAR Y; DOWN for PRIMARY. The SW LED remains OFF in NSM.

For more detailed information regarding the “redundant twister” module, refer to the section titled Setting the DIP Switches in the “redundant twister”

Media Converter 7000 Installation & User Guide.

DIP Switches

RJ-45

12345

RED

LLCF

LINK

AUTO

10 BASE

M A

N P

RESET

LK AT

SEC

PWR

Page 27

“twister” Media Converter 7000

10Mbps Thinnet Coaxial “twister” 7000 Module:

LE7313C-R2 RJ-45 to BNC __________________________ 100m/185m

This module provides twisted-pair to Thinnet coax segment integration.

LED Operation:

• PWR: normal operation

• LK: satisfactory receive link status on TP port

• AT: receiving data

• COL: detection of collision condition

Jumper Settings: This interface module is shipped with a user selectable jumper installed at the factory. The jumper is located at JP4 and is used to set either internal or external termination of the BNC port.

• Set the jumper to enable internal 50Ω termination by

connecting pins 1&2

• Set the jumper to enable use of external termination by connecting pins 2&3 (default)

RJ-45

BNC

Jumper JP4 Termination

JP4

10 BASE

LK AT

COL

PWR

BNC

Page 28

28 User Guide

RJ-45

F/O ST/SMA/SC

LLCF

3 2 1

10 BASE

LK AT

PWR

R X

T X

10 BASE

LK AT

PWR

R X

T X

10Mbps Fiber Optic “twister” 7000 Modules:

LE7313C-SC-R2 RJ-45 to FL multimode SC __________ 100m/2km LE7314C-R2 RJ-45 to FL multimode ST __________ 100m/2km LE7316C-R2 RJ-45 to FL singlemode ST __________ 100m/8km LE7316C-MM-R2 RJ-45 to FL multimode SMA ________ 100m/2km

These modules provide transparent integration of 10BASE-T and 10BASE-FL segments in Ethernet environments.

LED Operation:

• PWR: normal operation

• LK: satisfactory receive link status on respective port

• AT: receiving data

Jumper Settings: Refer to the diagram below for the location of the Link Loss Carry Forward (LLCF) jumper.

• Set the jumper to enable LLCF by connecting pins 1&2

• Set the jumper to disable LLCF by connecting pins 2&3 (default)

Page 29

“twister” Media Converter 7000

TELCO 50

RJ-45

F/O ST/SC

TELCO 50

F/O ST/SC

RJ-45

PWR

10BASE

PWR

10BASE

10Mbps TELCO Converter Interface Modules:

LE7302C TELCO to Dual RJ-45___________________ 100m/100m LE7324C-SC TELCO to Dual FL multimode SC ___________ 2km/2km LE7324C TELCO to Dual FL multimode ST ___________ 2km/2km LE7326C TELCO to Dual FL singlemode ST __________ 2km/8km

These dual port “twister” modules are designed specfically to provide media conversion between the two individual network connections on the front of the module and a 50-pin TELCO connector on the back of the chassis. Since each module consists of two network connections, up to 24 individual connections can be supported by the LE7312A-R2 and LE7312A-PS-R2 chassis, and up to 12 individual connections can be supported by the LE7306A chassis.

LED Operation:

• PWR: normal operation

• LK: satisfactory receive link status on respective port

• AT: receiving data

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30 User Guide

MDF 2

Slot # 1 2 3 4 5 6 7 8 9 10 11 12

DISCONNECT ALL POWER

SOURCES BEFORE SERVICING

AC IN 90-250V

50/60Hz 1A

POWER ACTIVE

DISCONNECT ALL POWER

SOURCES BEFORE SERVICING

AC IN 90-250V

50/60Hz 1A

POWER ACTIVE

MDF 1

Slots

1 – 6

Ports

1 – 12

Slots

7 – 12

Ports

13 – 24

PWR

10BASE

PWR

10BASE

PWR

10BASE

PWR

10BASE

PWR

10BASE

PWR

10BASE

PWR

10BASE

PWR

10BASE

10BASE10BASE10BASE10BASE

The diagram below shows the numbering sequence of the module slots. The first six slots (12 ports) connect to the backplane of the TELCO connector labeled MDF 1. The second six slots (12 ports) connect to the backplane of the TELCO connector labeled MDF 2. For a more expanded view, please refer to the Topology Solutions diagram in the User Guide section titled Media Converter 7000 with TELCO “twister” modules.

NOTE: All “twister” 7000 Modules connected to the TELCO connector have their transmit and receive pairs internally crossed over. Please refer to the diagrams titled Straight/Cross Over RJ-45 Twisted-pair Cables in the User Guide section of this manual.

Page 31

“twister” Media Converter 7000

Chassis Technical Specifications

Power

Input ___________________________ 90-250V AC 80W maximum Output _______________________________________________ 60W

Environmental

Operating T emperature _______________________________ 0° — 50° C Storage Temperature________________________________ -30° —70° C Relative Humidity _____________________ 5% — 95% non-condensing Physical Case _____________________Fully enclosed metal construction Dimensions: LE7312A-R2, -PS-R2 _________ 11.3” L x 17.0” W x 3.5” H

LE7306A ____________________11.3” L x 8.5” W x 3.5” H

Weight: LE7312A-R2, -PS-R2 _______________________ 20lbs (9kg)

LE7306A _______________________________ 7 lbs (3.25kg)

Regulatory

Compliance______________________ IEEE 802.3/802.3u (ISO 8802-3):

10BASE-T, 10BASE-2, 10BASE-FL/FOIRL,

100BASE-TX, 100BASE-FX Safety _______________________ UL, C-UL, CSA, EN60950 (TUV) Emissions ________________ FCC Part 15, Class A, EN55022 a (CISPR)

Page 32

32 User Guide

SECONDARY

Power Supply

PRIMARY

Power Supply

100 BASE

LK AT

PWR

R X

T X

100 BASE

“redundant twister”

MAIN

RESET

LK AT

PRIMARY

LK AT

SECONDARY

LK AT

R X

T X

R X

T X

PWR

100 BASE

“redundant twister”

MAIN

RESET

LK AT

PRIMARY

LK AT

SECONDARY

LK AT

R X

T X

R X

T X

PWR

DISCONNECT ALL POWER

SOURCES BEFORE SERVICING

AC IN 90-250V

50/60Hz 1A

POWER ACTIVE

DISCONNECT ALL POWER

SOURCES BEFORE SERVICING

AC IN 90-250V

50/60Hz 1A

POWER ACTIVE

Operating Features of the “twister” Power Supply Modules

Load Sharing Power Supply Modules (LE7312A-R2, LE7312-PS-R2)

When a chassis is equipped with two load-sharing power supply modules, they operate in tandem and share the connected load. This decreases the demand put on each individual unit.

There are two LEDs on the front panel of each Power Supply Module. When illuminated, these LEDs indicate the following:

• POWER LED indicates the connection of an active power source to that Power Module

• ACTIVE LED indicates that the “twister” chassis is getting its power from that particular Power Module

Because the LE7312A-R2 and LE7312-PS-R2 load-shares power, both LEDs – on both units – are illuminated simultaneously.

If the power source to one of the modules should fail or be removed, the remaining module automatically takes over the entire load. This will be indicated by the following:

• The ACTIVE and POWER LEDs on one of the power modules turn off.

• The ACTIVE and POWER LEDs on the other power module remain illuminated.

Page 33

“twister” Media Converter 7000

DISCONNECT ALL POWER

SOURCES BEFORE SERVICING

AC IN 90-250V

50/60Hz 1A

POWER ACTIVE

Retaining Screw

Thumb Screw

ON/OFF Switch

Vent

LEDs

Power Receptacle

Power Supply Service Instructions

The following instructions explain the procedure to follow when replacing a Power Supply Module or installing a second Power Supply Module in the “twister” LE7306A, LE7312A-R2 or LE7312-PS-R2 chassis.

IMPORTANT

The Power Supply Module is an open frame-type power

supply — LIVE VOLTAGES ARE PRESENT — and poses

a danger if the module is installed improperly.

• Remove all power cords from AC receptacles located on the Power Supply Module. Do not apply power to the module when it is removed from the chassis.

• Use a Number 1 Phillips screwdriver to remove the retaining screw located on the front panel.

• Turn the thumb screw to the left to un-secure the module/blank panel from the chassis.

• Remove the Power Supply Module/blank panel.

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34 User Guide

• Insert the module into the slot making sure that the edges are in the guides. Do not force the Power Supply Module into the chassis unnecessarily. The module should slide in easily.

• Slide the Power Supply Module into the chassis until the front panel is flush and even with the chassis.

• Turn the thumb screw to the right and tighten to secure the power module into the chassis.

• Secure the front panel of the Power Supply Module to the chassis with the retaining screw and using the Number 1 Phillips screwdriver.

Page 35

“twister” Media Converter 7000

Link Loss Carry Forward (LLCF)

The “twister” modules (with the exception of the 10Mbps BNC and TELCO modules) have been designed with an LLCF function for troubleshooting a remote connection. The modules are shipped with the LLCF disabled.

When LLCF is enabled, the FX ports as well as the TX ports on the “twister” modules, do not transmit a link signal until they receive a link signal from the opposite port. For example, if LLCF is enabled and two “twister” modules are connected via a fiber cable with nothing else connected to them, the Link LED does not illuminate. When a valid link is established at the twisted-pair port, a complete connection is accomplished.

The diagram below shows a typical network configuration using a “twister” module for remote connectivity:

If the fiber connection breaks, or the remote device fails, the “twister” module carries that link loss all the way to the switch/hub which generates a trap to the management station. The administrator can then look at the module to determine the source of the loss.

IMPORTANT: When connecting a “twister” module with LLCF enabled to an auto-negotiating device, force both sides of the configuration to either 10 or 100Mbps full or half duplex. This allows the interface module to immediately see link pulses and start passing data.

Management

Station

Management

Station

Switch/Hub

w/SNMP

Switch/Hub

w/SNMP

“twister” 7000

Module

“twister” 7000

Module

Remote

up to 40km

LED lit = established link LED unlit = no link

Management

Station

Management

Station

Switch/Hub

w/SNMP

Switch/Hub

w/SNMP

“twister” 7000

Module

“twister” 7000

Module

Broken

Remote

Cable

Link Loss Carried

LED lit = established link LED unlit = no link

Page 36

36 User Guide

Straight RJ-45 Twisted-pair Cables

Cross Over RJ-45 Twisted-pair Cables

COLOR

Brown

Brown Stripe

Green

Blue Stripe

Blue

Green Stripe

Orange

Orange Stripe

•SIGNAL•

—— ——

RX– —— ——

RX+

TX–

TX+

NOTE:

Locking Tab

on connector is

facing away.

8 7 6 5 4 3 2 1

COLOR

Brown

Brown Stripe

Green

Blue Stripe

Blue

Green Stripe

Orange

Orange Stripe

•SIGNAL•

—— ——

RX– —— ——

RX+

TX–

TX+

8 7 6 5 4 3 2 1

COLOR

Orange

Orange Stripe

Green

Green Stripe

•SIGNAL•

—— ——

RX–

—— ——

RX+

TX– TX+

NOTE:

Locking Tab

on connector is

facing away.

8 7 6 5 4 3 2 1

COLOR

Green

Green Stripe

Orange

Orange Stripe

•SIGNAL•

—— ——

RX–

—— ——

RX+

TX– TX+

8 7 6 5 4 3 2 1

Page 37

“twister” Media Converter 7000

Topology Solutions

Media Converter 7000 with “redundant twister” modules:

Switch

Twisted-pair Connection Primary Fiber Optic Link Secondary Fiber Optic Link

2km multimode

15km singlemode

Fiber Optic Link

Switch

Media Converter 7000 with MM-to-SM (multimode-to-singlemode) “twister” modules:

Page 38

38 User Guide

Topology Solution

15km singlemode

“twister” Media Converter 7000

40km singlemode

Twisted-pair Connection Fiber Optic Link

Switch

Page 39

“twister” Media Converter 7000

100

Switch

Page 40

40 User Guide

Topology Solutions

Media Converter 7000 with stand-alone “twisters” in mixed 10/100Mbps environment:

Twisted-pair Connection Fiber Optic Link

REMOTE CAMPUS

MAIN CAMPUS

“twister” LE1345A

“twister”

LE611A

10Mbps Switch

10/100Mbps Switch

DORMATORIES

LIBRARY

10/100Mbps Switch

40km 100Mbps F/O

5km 10Mbps F/O

100Mbps F/O

ADMINISTRATION

10/100Mbps Switch

Page 41

“twister” Media Converter 7000

TELCO

Twisted-pair Connection Fiber Optic Link Telco

Switch

Concentrator

Topology Solutions

Media Converter 7000 with TELCO “twister” modules:

Page 42

42 User Guide

Product Safety, EMC and Compliance Statements

This equipment complies with the following requirements:

• UL

• CSA

• EN60950 (safety)

• FCC Part 15, Class A

• EN55022 Class A (emissions)

• EN50082-1 (immunity)

• IEC 825-1 Classification

Class 1 Laser Product

• TUV

Radio Frequency Interference Statements

FCC Radio Frequency Interference Statement

This equipment has been tested and found to comply with the limits for Class A digital device, pursuant to Part 15 of 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 communication. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

CAUTION: Changes or modifications to this equipment not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

Canadian Radio Frequency Interference Statement

This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.

Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.

Page 43

“twister” Media Converter 7000

Electrical Safety Statement

Normas Oficiales Mexicanas (NOM)

INSTRUCCIONES DE SEGURIDAD

1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado.

2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura.

3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de operación deben ser respetadas.

4. Todas las instrucciones de operación y uso deben ser seguidas.

5. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo, cerca de la tina de baño, lavabo, sótano mojado o cerca de una alberca, etc.

6. El aparato eléctrico debe ser usado únicamente con carritos o pedestales que sean recomendados por el fabricante.

7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea recomendado por el fabricante.

8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más allá a lo descrito en las instrucciones de operación. T odo otro servicio deberá ser referido a personal de servicio calificado.

9. El aparato eléctrico debe ser situado de tal manera que su posición no interfiera su uso. La colocación del aparato eléctrico sobre una cama, sofá, alfombra o superficie similar puede bloquea la ventilación, no se debe colocar en libreros o gabinetes que impidan el flujo de aire por los orificios de ventilación.

10.El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor como radiadores, registros de calor, estufas u otros aparatos (incluyendo amplificadores) que producen calor .

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11.El aparato eléctrico deberá ser connectado a una fuente de poder sólo del tipo descrito en el instructivo de operación, o como se indique en el aparato.

12.Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada.

13.Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados sobre o contra ellos, poniendo particular atención a los contactos y receptáculos donde salen del aparato.

14.El equipo eléctrico debe ser limpiado únicamente de acuerdo a las recomendaciones del fabricante.

15.En caso de existir, una antena externa deberá ser localizada lejos de las lineas de energia.

16.El cable de corriente deberá ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo.

17.Cuidado debe ser tomado de tal manera que objectos liquidos no sean derramados sobre la cubierta u orificios de ventilación.

18.Servicio por personal calificado deberá ser provisto cuando: A: El cable de poder o el contacto ha sido dañado; u B: Objectos han caído o líquido ha sido derramado dentro del aparato; o C: El aparato ha sido expuesto a la lluvia; o D: El aparato parece no operar normalmente o muestra un cambio en su

desempeño; o

E: El aparato ha sido tirado o su cubierta ha sido dañada.

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