3Com 3CRWEASY96A - 11 Mbps Wireless LAN Outdoor Bridge... Manuel utilisateur

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User Guide

Wireless LAN Outdoor Bridge Solution

3CRWEASY96A

Complete Building-to-Building Outdoor Wireless LAN Kit

Published February, 2003

Document Version 1.2.0

3Com Corporation

5500 Great America

Parkway

Santa Clara, California

95052-8145

reproduced in any form or by any means or used to make any derivative work (such as

translation, transformation, or adaptation) without written permission from 3Com Corporation.

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notiﬁcation of such revision or change.

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may make improvements or changes in the product(s) and/or the program(s) described in this

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UNITED STATES GOVERNMENT LEGEND

If you are a United States government agency, then this documentation and the software

described herein are provided to you subject to the following:

All technical data and computer software are commercial in nature and developed solely at

private expense. Software is delivered as “Commercial Computer Software” as deﬁned in DFARS

252.227-7014 (June 1995) or as a “commercial item” as deﬁned in FAR 2.101(a) and as such is

provided with only such rights as are provided in 3Com’s standard commercial license for the

Software. Technical data is provided with limited rights only as provided in DFAR 252.227-7015

(Nov 1995) or FAR 52.227-14 (June 1987), whichever is applicable. You agree not to remove or

deface any portion of any legend provided on any licensed program or documentation

contained in, or delivered to you in conjunction with, this User Guide.

Unless otherwise indicated, 3Com registered trademarks are registered in the United States and

may or may not be registered in other countries.

3Com, the 3Com logo, and SuperStack are registered trademarks of 3Com Corporation. Wi-Fi is

a trademark of the Wireless Ethernet Compatibility Alliance.

All other company and product names may be trademarks of the respective companies with

which they are associated.

EXPORT RESTRICTIONS:

This product contains Encryption and may require US and/or Local

Government authorization prior to export or import to another country.

Contents

Introduction

Basic Network Topologies 7

Point-to-Point 7

Point-to-Multipoint 8

Basic Operating Modes 9

Installing the Outdoor Bridge

Installation Requirements 10

Power Requirements 10

Administration Requirements 11

Installation Guidelines 11

Proper Grounding 11

Alignment 12

Polarization 12

Restrictions on Antenna Use 12

Safety Information 13

Mounting the Bridge to a Mast 14

Connecting the Bridge to the LAN 15

Using the Power Supply 15

Using a Power-Over-Ethernet LAN Port 15

Installing Software Utilities 16

Establishing Wireless Association 17

Conﬁguring the Building-to-Building Bridge

Using the 3Com Wireless Device Manager 18

Launching a Wireless Device Conﬁguration 18

Using the Pre-IP Conﬁguration Wizard 20

Using the RSSI Monitor 20

Saving Conﬁguration Changes 21

Changing System Properties 21

Setting IP Network Properties 22

Setting up Protocol and Port Filtering 23

Setting Wireless Network Properties 24

Setting Advanced Performance Properties 26

Setting up an Ad Hoc Network 28

Optimizing an Ad Hoc Installation 29

Setting up an Access Point Infrastructure Network 30

Changing Security Settings 31

No Security (Open System) 32

40-bit Shared Key (Wi-Fi) 32

128-bit Shared Key 33

128-bit Dynamic Security Link 33

Setting up the Wireless Network Login 33

Resetting the Bridge 33

Restoring a Bridge to Factory Defaults 34

Upgrading the System 34

Changing the Administration Password 35

Backing up a Conﬁguration 35

Restoring a Conﬁguration 36

Viewing the Client List 36

Resetting Statistics Listings 37

Clearing the Client List 37

Viewing Connection Status 37

Viewing the System Summary 37

Interoperating with Third-Party Equipment 37

Troubleshooting

Diagnosing Problems 38

Disconnecting the Bridge 40

Uninstalling Software and Documentation 40

Upgrading Bridge Firmware 40

Technical Support

Online Technical Services 41

Support from Your Network Supplier 42

Support from 3Com 42

Returning Products for Repair 43

Regulatory Compliance Information

Index

NTRODUCTION

The 3Com® Wireless LAN Outdoor Bridge Solution is a comprehensive

building-to-building outdoor wireless LAN kit that reduces the need to evaluate,

purchase and assemble separate components. One convenient package includes

everything you need to offer an easy-to-manage building-to-building wireless

LAN. The package features a 3Com Wireless LAN Building-to-Building Bridge with

integrated antenna and power-over-Ethernet cable in a durable,

weatherproof enclosure.

This all-in-one wireless LAN solution delivers three to four times the bandwidth of

T1 links, with signiﬁcantly lower operational costs. The wireless bridge lets you

connect cross-campus buildings, or portable or temporary classrooms, at

distances up to 16 kilometers (10 miles), where local regulations allow. The

building-to-building bridge interoperates seamlessly with other Wi-Fi certiﬁed

access points in large multi-vendor environments.

ASIC

ETWORK

OPOLOGIES

The 3Com bridge can be used in two types of wireless network topologies:

■

Point-to-point

■

Point-to-multipoint

OINT

-P

OINT

Point-to-point topology is the simplest way to use the 3Com bridge, and it offers

the highest performance level. Two 3Com outdoor bridges form a direct wireless

association between the wired LANs in two remote buildings. See the following

diagram of the point-to-point topology.

OINT

-M

ULTIPOINT

Point-to-multipoint topology allows communication among three or more

buildings. In the central building, an access point equipped with an

omnidirectional antenna provides wireless association among the wired LANs in

the other buildings where 3Com outdoor bridges are installed.

If a 3Com 11 Mbps Wireless LAN Access Point 8000 is used (with an 8dBi

omnidirectional antenna) this topology can connect wired LANs over distances up

to 10 kilometers (6 miles). If an access point from another Wi-Fi compliant

manufacturer is used, the range depends on that manufacturer’s device

limitations.

ASIC

PERATING

ODES

Two operating modes relate to the basic WLAN topologies:

■

Ad hoc mode is the basis for point-to-point topology. Operating in ad hoc

mode, two outdoor bridges can associate without an access point, allowing

the LANs to which they are connected to communicate.

■

Access Point (Infrastructure) mode is the basis for point-to-multipoint

topology. Operating in access point mode, multiple 3Com outdoor bridges act

as clients to an Access Point 8000 or a Wi-Fi compliant access point from

another manufacturer.

NSTALLING

THE

UTDOOR

RIDGE

This equipment must be installed in compliance with local and national building

codes, regulatory restrictions, and FCC rules. For the safety of people and

equipment, only professional network personnel should install the bridge, cables,

and antennas.

NSTALLATION

EQUIREMENTS

The following items are required for installation:

■

For a point-to point conﬁguration, two 3Com outdoor bridges.

■

For a point-to-multipoint conﬁguration, one 3Com 11Mbps Wireless LAN

Access Point 8000 (or other Wi-Fi compliant access point) with an

omnidirectional antenna for one building, and one 3Com outdoor bridge for

each other building.

■

Mounting hardware (supplied with each bridge).

■

Properly grounded outdoor mast or wall mount.

■

Lightning arrestor properly grounded at each building in the topology.

■

Outdoor rated category 5 Ethernet cable (3Com part number

3CWE487 recommended).

OWER

EQUIREMENTS

The bridge complies with the IEEE 802.3af power-over-Ethernet standard. It

receives power over outdoor rated Ethernet cable (3Com part number 3CWE487

recommended). Installation requires the use of either the 3Com power supply

provided or IEEE 802.3af compliant power supply equipment (output power rated

48 V dc @ 200 mA minimum). Such equipment must b

safety certiﬁed according

to UL, CSA, IEC or other applicable national or international safety requirements

CAUTION

: Before installing, see the important warnings and cautions in “Safety

Information” on page 13.

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