ADC Telecommunications CX-DS3-53G Point to Point DSX3 / IP Transceiver User Manual interWave WaveNet Link CX

ADC Telecommunications Inc. Point to Point DSX3 / IP Transceiver interWave WaveNet Link CX

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CX DS3 53G User Manual HTML Version

User Manual

(FCC Certified Version)

Part Number 100757-001

5/02 Version A

WaveNet Link CX User Manual

The products described in this document are products of interWAVE Communications, Inc. or its licensers.

No part of this document may be photocopied, reproduced, translated, transferred, disclosed or otherwise

provided to third parties without the prior written consent of an officer of interWAVE Communications, Inc.

This document applies to the interWAVE Communications, Inc. release of the WaveNet Link product line and

to all subsequent versions and releases of the hardware or software unless otherwise indicated in a new

version or an update package for this edition.

Publications requests should be addressed to your local sales support office.

interWAVE Communications, Inc. reserves the right to make changes to any products described herein at any

time without notice. interWAVE Communications, Inc. does not assume any responsibility or liability arising

out of the application or use of any product described herein, except as expressly agreed to in writing by

interWAVE Communications, Inc. nor does the purchase or use of a product from interWAVE Communica-

tions, Inc. convey a license under any patent rights, copyrights, trademark rights, or any other of the

intellectual property rights of interWAVE Communications, Inc. or third parties.

Use, duplication, or disclosure by the U.S. Government is subject to restrictions of FAR 52.227-14 (g) (2)

(6/87) and FAR 52.227-19 (6/87), or DFAR 252.227-7015 (b) (6/95) and DFAR 227.7202-3 (a).

The software described in this document is furnished under a license agreement or nondisclosure

agreement. The software may be used or copied only in accordance with the terms of the agreement. It is a

violation of interWAVE Communications, Inc. proprietary rights to copy the software on any medium except

as specifically allowed in the license or nondisclosure agreement. interWAVE and interWAVE Communica-

tions, Ltd. hold the following United States Patents: No. 5,577,029, No. 5,654,968, No. 5,682,403,

No. 5,721,735, No. 5,734,699, No. 5,734,979, No. 5,761,195, No. 5,781,582, No. 5,818,824,

No. 5,842,138, No. 5,887,256, No. 5,953,651, No. 5,957,464, No. 5,999,813, No. 6,070,071,

No. 6,078,823, No. 6,081,716, No. 6,101,400, No. 6,169,907, No. 6,173,177, No. 6,212,395,

No. 6,269,255, No. USP D 391,967, No. USP D 391,968, No. USP D 397,693.

Trademark Acknowledgment

interWAVE, WaveNet, WaveNet Access, WaveNet Link, WaveNet Transport, Broadband Without Boundaries,

StarPort, and StreamNet are trademarks or registered trademarks of interWAVE Communications, Inc. All

other trademarks, service marks and product names mentioned in this document are the property of their

respective owners.

iii

United States Federal Communications Commission Required User Documentation

This equipment complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

(1) this device may not cause harmful interference, and (2) this device must accept any interference received,

including interference that may cause undesired operation.

Changes or modifications not expressly approved by interWAVE in writing can void the user’s authority to

operate this equipment.

This device must be professionally installed.

This device is to be exclusively used for fixed point-to-point operation

with directional antennas.

iv Link CX User Manual, Version A

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Table of Contents

Welcome! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

Document Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

Microwave Radiation Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xii

Customer Support Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii

Conventions Used in this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv

Chapter 1 System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1-1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1-1.1 Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1-1.2 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1-2 System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1-3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1-4 Link CX Basic Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1-4.1 Radio Links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1-4.2 Data Stream . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1-4.3 Link CX Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1-4.4 Mounting and Antenna Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1-4.5 Interface Connectors and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1-4.6 Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1-4.7 Integral Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1-4.8 External Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1-4.9 Configuration, Operation, and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1-4.10 SNMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1-4.11 Link CX Network Management Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1-4.12 NMS Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1-4.13 Web-Based GUI Access Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1-4.14 GUI Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1-5 Typical Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

1-5.1 Internet (ISP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

1-5.2 Private Network Wireless Bridged LANs and WANs . . . . . . . . . . . . . . . . . . . . . . . . . . 17

1-5.3 PCS/PCN and Cellular Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

1-5.4 Wireless Local Loop Networks and Local Exchange Bypass . . . . . . . . . . . . . . . . . . . . 17

1-5.5 Business Bypass and Local Exchange Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

1-5.6 Backhaul for Wireless MTU and MTU Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

1-5.7 Wireless Mesh Backhaul Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

1-5.8 Wireless ATM Mesh Distribution with StreamNet . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

1-6 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Chapter 2 Installation Steering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

2-1 Installation Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

vi Link CX User Manual, Version A

Chapter 3 Installation Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

3-1 Planning a Link CX Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3-2 Site Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

3-3 Planning Element and Network Management Ethernet Links . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

3-4 Planning DS-3 Links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

3-5 Power Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

3-6 Transmit Power Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

3-6.1 Maximum Link CX Power Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

3-6.2 Calculating the Required Transmit Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

3-7 Radio Link Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Chapter 4 Installing the Link CX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

4-1 Before Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

4-1.1 General Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

4-1.2 Equipment and Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

4-1.3 Packing Lists and Orderable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

4-1.4 Installation Tools and Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

4-2 Initial Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

4-2.1 Connecting a Craft PC to the Link CX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

4-2.2 Logging In to the Link CX Built-In Web Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

4-3 Mounting the Link CX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

4-3.1 Installing the Link CX Mounting Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

4-3.2 Attaching the Link CX to the Mounting Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

4-4 External Antenna Installation (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

4-4.1 Installing a Factory-Supplied 4 Foot (122 cm) Antenna Mounting Bracket . . . . . . . . . 56

4-5 Completing the Link CX Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

4-5.1 Mounting the Lightning Arrestor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

4-5.2 Routing the Data and Power Cables from the Lightning Arrestor . . . . . . . . . . . . . . . . 70

4-5.3 Grounding the Link CX and Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

4-5.4 Sealing the Data and Power Cable Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

4-6 Aligning the Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

4-6.1 Integral Antenna on a Single Adjustable Elevation Mount . . . . . . . . . . . . . . . . . . . . . . 73

4-6.2 Integral Antenna on a Dual Adjustable Elevation Mount . . . . . . . . . . . . . . . . . . . . . . . 74

4-6.3 External Antenna on Antenna-Specific Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

4-7 Acceptance Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Chapter 5 Final Link CX Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81

Chapter 6 Monitoring and Trend Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83

6-1 Built-In Web Server Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

6-2 SNMP Network and Element Management Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

6-2.1 SNMP Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

6-2.2 Monitoring Error Messages and Traps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Chapter 7 Troubleshooting the Link CX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85

7-1 Troubleshooting Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

vii

7-2 Using the Link CX LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

7-3 Using RSSI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

7-4 Using a Web Browser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Appendix 1 Interface Cable Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

A1-1 DS-3 Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

A1-2 Ethernet Data Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

A1-3 DC Power Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

A1-4 Ethernet Crossover Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

A1-5 External Antenna Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

A1-6 RS-232 Craft Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

A1-7 StreamNet ATM Switch Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Appendix 2 Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

A2-1 Link CX Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

A2-2 Factory-Supplied Antennas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Appendix 3 Using the Web-Based GUI User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

A3-1 Web Browser Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

A3-2 Connecting A Web Browser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

A3-3 Accessing the Link CX Web Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

A3-4 Link CX Web Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Appendix 4 Grounding and Lightning Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

A4-1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

A4-2 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

A4-3 Lightning Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

A4-4 Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Appendix 5 Enterprise MIBs and Traps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

A5-1 Enterprise MIB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

A5-2 Enterprise Traps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

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Preface

Welcome!

This manual is intended for the technical personnel who will install and operate the U-NII (Unlicensed

National Information Infrastructure) and ISM (Industrial, Scientific and Medical) Link CX. Such personnel

are typically experienced and skilled technicians familiar with on site, physical installation and

connection of equipment, including maintenance work. It is also intended for system administration

personnel performing initial configuration and subsequent system reconfiguration, as well as current

system maintenance activities.

Document Organization

This manual provides a detailed description of the Link CX components, and operating, installation and

management procedures.

•Chapter 1 provides an overview and briefly describes typical applications.

•Chapter 2 provides an installation steering guide with references to subsequent installation

sections.

•Chapter 3 describes how to plan the Link CX network, radio links, and remote element and

network management links, and individual Link CX radios.

•Chapter 4 provides detailed hardware installation and acceptance test procedures.

•Chapter 5 describes final configuration procedures and the Web browser user interface.

•Chapter 6 presents procedures for monitoring and performing trend analysis on the

Link CX.

•Chapter 7 provides instructions for troubleshooting the Link CX.

•Appendixes provide detailed technical information for carrying out the installation and main-

tenance activities described in the other chapters of this manual.

Microwave Radiation Warnings

Radio Warning

Under normal operating conditions, Link CX radio equipment complies with the limits for human

exposure to radio frequency (RF) fields adopted by the Federal Communications Commission (FCC). All

interWAVE Communications, Inc. microwave radio equipment is designed so that under normal working

conditions, microwave radiation directly from the radio is negligible when compared with the

permissible limit of continuous daily exposure recommended in the United States by ANSI/IEEE

C95.1-1991 (R1997), Safety Levels with Respect to Human Exposure to Radio Frequency Electromag-

netic Fields, 3 kHz to 300 GHz.

x Link CX User Manual, Version A

Microwave signal levels that give rise to hazardous radiation levels can exist within transmitter power

amplifiers, associated RF multiplexers, and antenna systems.

Antenna Warning

Designed for point-to-point operation, the Link CX microwave radio system uses directional antennas to

transmit and receive microwave signals. These directional antennas are usually circular or rectangular,

are generally located outdoors, and are usually mounted with the Link CX on a tower or mast.

The Link CX is classified as a fixed installation product, and per FCC policy guidelines regarding

maximum permissible exposure (MPE), antennas used for this interWAVE radio must be installed to

provide a separation distance of 2 m (79 in.) or more from all persons during normal operation to satisfy

FCC RF exposure limits. As the Link CX is typically mounted on a building or mast high enough to clear

ground-level path obstructions, the general population will be further than 2 m (79 in.) from the radio

antenna, and the FCC RF exposure limits will be met.

interWAVE Communications, Inc. fully supports the FCC’s adopted MPE limits, and recommends that

personnel stay 2 m (79 in.) or more from the front of all directional microwave antennas. Should you

have questions about Link CX microwave signal radiation, please contact interWAVE Customer Support.

FCC Regulatory Information

The Link CX is certified for use in the 5.3 GHz and 5.8 GHz unlicensed bands in the United States.

The 5.3 GHz version of the Link CX is certified under FCC part 15.407, U-NII regulations covering the

frequency band of 5250-5350 MHz.

5.3 GHz (5.25-5.35 GHz)

5.3 GHz Link CX radios are equipped with an integral antenna only, and operate under the FCC Part 15,

subpart E, U-NII license-exempt regulations, which certify the radios for –1.0 dBm average, or

+7.4 dBm peak transmit power. The 5.3 GHz Link CX radios have been certified in the following

configuration:

•Link CX, 5.3 GHz, integral antenna

The following table summarizes the technical specifications of the 5.3 GHz version of the Link CX.

Never look into the front of an open RF connection or RF antenna as eyes

are particularly vulnerable to radiation. Do not disconnect RF coaxial

connectors, open microwave units, or break down any microwave

screening while the radio equipment is operating.

5.8 GHz (5.725-5.825 GHz)

The 5.8 GHz Link CX radios operate under the FCC Part 15.247 band regulations, which certify the

radios for +16 dBm average or +24.1 dBm peak transmit power for intentional radiators in a

point-to-point configuration. The 5.8 GHz Link CX radios are equipped with an integral or an external

antenna. The 5.8 GHz Link CX radios have been FCC certified in the following configurations:

•Link CX, 5.8 GHz, integral antenna

•Link CX, 5.8 GHz, 2 ft. (61 cm) external Radio Waves, Inc. Model SP2-5.2 parabolic antenna

•Link CX, 5.8 GHz, 2 ft. (61 cm) external Gabriel Electronics, Inc. Model SSP2-52B parabolic

antenna

•Link CX, 5.8 GHz, 4 ft. (122 cm) external Gabriel Electronics, Inc. Model SSP4-52B para-

bolic antenna

See the following table summarizing the technical specifications for the 5.8 GHz version of the Link CX.

Table 1 5.3 GHz Link CX Specifications

Parameter Description

FCC Identifier OEWCX-DS3-53G

Frequency Band 5250 – 5350 MHz, U-NII per 15.407

Mode of Operation Full Duplex, 100% duty cycle

Channel Spacing 16 MHz

Transmit / Receive Separation 60 MHz

Number of Channel Pairs 2

Channel Pair 1 5262 MHz / 5322 MHz

Channel Pair 2 5278 MHz / 5338 MHz

Modulation 16 QAM, α = 0.15

Emission Bandwidth (26 dB) 13.9 MHz

Frequency Stability +/- 5.0 PPM

Maximum Output Power -1.0 dBm average (+7.4 dBm peak)

Antenna Type Integral flat panel

Antenna Gain 21 dBi

User Interfaces DSX3 coaxial, 10/100 base-T Ethernet, Craft PC RS-232

interface

xii Link CX User Manual, Version A

Note that any references in this manual referring to external antennas, or external antenna mounting

only apply to the 5.8 GHz version of the Link CX. The 5.3The 5.8 GHz Link CX radios are equipped with

an integral or an external antenna, GHz version is certified for use with the integral antenna only.

Related Documentation

All interWAVE manuals are available in an online format on our protected Internet site. To order docu-

mentation, please contact interWAVE Communications, Inc. Sales department online at

http://www.iwv.com.

Updates to this manual will be posted on the interWAVE Communications, Inc. Customer Support

website at http://www.iwv.com/custsupport. Registered interWAVE customers can access the

interWAVE online information and support service, available 24 hours a day, seven days a week. The

interWAVE online service provides users with a wealth of up-to-date information, with documents being

added or updated each month.

Table 2 5.8 GHz Link CX Specifications

Parameter Description

FCC Identifier OEWCX-DS3-58G

Frequency Band 5725 – 5850 MHz, per 15.247, revised 5/16/02

Mode of Operation Full Duplex, 100% duty cycle

Channel Spacing 16 MHz

Transmit / Receive Separation 60 MHz

Number of Channel Pairs 2

Channel Pair 1 5737 MHz / 5797 MHz

Channel Pair 2 5753 MHz / 5813 MHz

Modulation 16 QAM, α= 0.15

Emission Bandwidth (26 dB) 13.9 MHz

Frequency Stability +/- 5.0 PPM

Maximum Output Power +16 dBm average (+24.1 dBm peak)

Antenna Types

Integral flat panel, 2 ft. parabolic – Radio Waves, Inc.

Model SP2-5.2, 2 ft. parabolic – Gabriel Electronics, Inc.

Model SSP2-52B

4 ft. parabolic – Gabriel Electronics, Inc. Model SSP4-52B

Antenna Gains 21 dBi, 28.3 dBi, and 34.6 dBi

User Interfaces DSX-3 coaxial, 10/100 base-T Ethernet, Craft PC RS-232

interface

xiii

Customer Support Services

interWAVE has regional Customer Support centers that handle day-to-day customer issues. Each center

is staffed with a local technical support group. The exact services to be performed by the interWAVE

Customer Support department are specified in a support contract. Below is an example of the types of

services available:

•Telephone support

•Site surveys

•Installations

•Off-line and online commissioning

•Network integration activities

•Troubleshooting and fault isolation

•Escalation of problems to appropriate interWAVE technical departments

interWAVE can physically perform all or a portion of these processes for the operator, as specified in

the support contract. The Customer Support department can also provide documentation outlining

corrective and preventive maintenance procedures and troubleshooting guides for fault isolation.

Contact your local Sales Support office, or interWAVE headquarters directly via the Internet at

http://www.iwv.com.

If possible, please have the following information available when making a call:

•Site number or name

•Full description of product(s) (e.g., model and part number) and configuration

•Serial number of product(s)

•Purchase order number

•Contact name and telephone number

•Ship to address

•Bill to address

For support on installing or configuring all interWAVE equipment, contact your Regional interWAVE

Customer Support Center at:

•+852.2574.1922 or asia_support@iwv.com.hk -- Asia and Pacific Rim

•+1.866.306.1263 or usa_support@iwv.com -- North and South America, Europe, Africa,

and Middle East

or via the Internet at http://www.iwv.com/custsupport.

xiv Link CX User Manual, Version A

Return Materials Authorization

In the event that a depot repair or hardware replacement is required after contacting Customer Support,

please contact interWAVE for return authorization. The following information is required by interWAVE:

•Full description of the product(s): model and part number

•Serial number of the product(s)

•Purchase order number

•Quantity that needs to be returned to interWAVE, if applicable

•Description of observed problem

All interWAVE products carry a one year manufacturing warranty from the date of shipment. At the time

of a request for a return authorization, if the product has exceeded the warranty period, interWAVE will

require a new purchase order number to cover the cost of non-warranty repair.

Contact Sales Operations via the Internet at http://www.iwv.com or email at rma@iwv.com.

Training

interWAVE has developed an extensive series of training courses designed to teach you how to use our

products. The courses are developed by a combination of subject matter experts and training specialists

in order to create highly technical materials in modern training format. Each of our course offerings are

designed around specific learning objectives that keep our classes on track to learning specific job skills

related to interWAVE products.

The interWAVE training catalog contains a listing of the interWAVE training services available along with

descriptions of each course. Our training materials are divided into specific subsystem training series,

depending upon the topic and job requirements.

Contact Customer Support via the Internet at http://www.iwv.com or email at training@iwv.com.

Conventions Used in this Manual

The following type and style conventions are used in this manual:

sssssss ssss ssssss ssssssssss sssssssssss ssssss ssss ssssss sssssssssss ssssssssss sssssssssss ssssss ssssssssss sssssssssss ssssssssss sssss ssss ssssss ssssssssss sssssssssss ssssss ssss ssssss sssssssssss ssssssssss sssssssssss ssssss ssss ssssss sssssssssss ssssssssss ssssss ssss sssssss ssssssssss sssssssssss ssssss ssss ssssss sssssssssss ssssssssss ssssssssss sssssss ssss ssssss sssssssssss ssssssssss ssssss ssss sssssss ssssssssss ssssssssss sssssssssss ssssss sssssssssss ssssssssss ssssssssss sssssss ssss ssssss ssssssssss sssssssssss ssssss ssss sssssss ssssssssss ssssssssss sssssssssss ssssss ssss ssssss sssssssssss ssssssssss ssssss sssss ssssss sssssssss

Table 3 Conventions Used in This Manual

Convention Meaning

Body text Used for regular body text

Bold Indicates a menu or button choice

Command Indicates computer generated text and prompts

User Input Indicates user input

<hostname> In command syntax, indicates user-specified command line parameters

<variable> In body text, indicates user-specified command line parameters

[BRACKETS] Indicates a key on the keyboard or instrument

Provides relevant additional information

Provides important warning information that may affect operation of or

maybe a potential threat to the system

Used to tell the reader to STOP what they are doing and to read

important instructions that are vital to prevent equipment or software

damage

xvi Link CX User Manual, Version A

(this page intentionally left blank)

System Description 1

One

System Description

10000

This chapter contains a functional description of the Link CX product family, and contains the following

sections:

•Section 1-1, General

•Section 1-2, System Overview

•Section 1-3, Features

•Section 1-4, Link CX Basic Structure

•Section 1-5, Typical Applications

Welcome to the interWAVE WaveNet Link Series product family. This manual is designed to introduce

you to the Link CX products, and to provide you with information necessary to plan, install, operate and

maintain a Link CX wireless communication system.

The Link CX is intended for professional installation only. However, this manual is also designed for

personnel who plan, operate and administer the Link CX communication system. Please review the

entire manual before powering up or deploying any Link CX.

1-1 General

1-1.1 Products

The Link CX products are cost-effective, all-outdoor, pole-mounted, high-capacity, line-of-sight (LOS)

digital radio transmission systems, each operating in the license-exempt 5.25-5.35 GHz (5.3 GHz) or

5.725-5.825 GHz (5.8 GHz) frequency bands. The Link CX can be used for the following applications:

point-to-point or building-to-building, WLL (wireless local loop), backup solutions, temporary links, and

mesh cellular backhaul.

•The 5.3 GHz Link CX-DSX DS-3 and 10/100 versions conform to the FCC (Federal Commu-

nications Commission) Part 15.407 Subpart E describing U-NII (Unlicensed National

Information Infrastructure) operation. It operates at up to -1.0 dBm average transmit power,

and is intended for short-distance use.

•The 5.8 GHz Link CX-DSX DS-3 and 10/100 versions conform to the FCC Part 15.247

describing intentional radiators. It operates at up to +16 dBm average power, and is

intended for use over longer distances.

Both Link CX-DSX versions provide either a standard DS-3 (44.736 Mbps) interface adhering to

Bellcore GR-499-CORE (DSX-3) standards, or provides two Ethernet 10/100Base-T interfaces adhering

to IEEE 802.3 standards, with a combined nominal line rate of 45 Mbps.

2 Link CX User Manual, Version A

Each Link CX is powered by an external ±21 to ±60 VDC power supply.

1-1.2 Applications

The Link CX product line is designed to serve the following communications markets:

•Internet Access and Backhaul Systems: Used by Internet Service Providers (ISPs).

•Private Networks: Wireless Bridged LANs and WANs.

•PCS/PCN and Cellular Networks: High speed links between base stations.

•Wireless Local Loop Networks: Fixed wireless, used by Local Exchange Carriers (LECs).

•Business Bypass or Local Exchange Bypass: Provided by Competitive Access Providers

(CAPs) and Competitive Local Exchange Carriers (CLECs).

•When used with interWAVE StreamNet ATM Switches, the Link CX can provide the radio

links in a self-healing wireless mesh backhaul network to support broadband communica-

tions, including DSL (Digital Subscriber Line) and Cellular over ATM (Asynchronous Transfer

Mode).

1-2 System Overview

Each Link CX consists of a Link CX radio, with integral antenna (5.3 GHz or 5.8 GHz versions) or an

optional external antenna (5.8 GHz versions), as shown in Figure 1-1, along with external power and

data cabling. In a typical installation, the Link CX radio and antenna are mounted outdoors, usually on a

tower or building. If so equipped, the external antenna connects to the Link CX radio through a

factory-supplied coaxial cable.

See Figure 1-1. A radio system, or link, contains two Link CX radios each equipped with either an

integral or external antenna, installed at each end of the link, separated by a line of sight transmission

path. Frequency band, terrain, actual line-of-sight and environmental conditions influence the range of

operation and path performance.

The Link CX carries one full-duplex DS-3 or Ethernet channel, and is powered by a 30-watt external

±21 to ±60 VDC power supply.

System Description 3

Figure 1-1 Typical Radio Link Configurations

A. Radio Link using 5.3 GHz or 5.8 GHz Link CX with Integral Antennas

B. Radio Link using 5.8 GHz Link CX with External Antennas

Line of Sight

Transmission Path

Line of Sight

Transmission Path

DS-3 or

Ethernet Data

DS-3 or

Ethernet Data

DS-3 or

Ethernet Data

DS-3 or

Ethernet Data

IW140201

4 Link CX User Manual, Version A

Because the Link CX can be ordered in two different bands, with high and low channels, and can be

installed with horizontal or vertical polarization, up to eight Link CXs can be mounted at a each hub, or

node, to form part of a star or mesh network. See Figure 1-2.

Figure 1-2 CX-UNII and CX-ISM Star Network

IW134204

2V 5.8

1H 5.8

2H 5.31V 5.3

1H 5.8

2V 5.8

2H 5.31V 5.3

Link CX 5.8

Link CX 5.3

a =

0 - 90°

Channel 1,

Horizontal

1H =

Channel 2,

Vertical

2V =

System Description 5

1-3 Features

The Link CX offers the following features:

•Robust outdoor all-outdoor enclosure.

•Integral or external antenna.

•Sturdy radio mounting systems for quick, accurate and reliable integral antenna alignment.

•Operates in the license-exempt 5.25-5.35 GHz (5.3 GHz) or 5.725-5.825 GHz (5.8 GHz)

bands.

•Conforms with FCC Part 15.247 rules (5.725-5.825 GHz) or Part 15.407 rules

(5.25-5.35 GHz).

•Full-duplex transmission:

•DS-3 (DSX-3, per Bellcore GR-499-CORE)

•Ethernet 10/100Base-T (per IEEE 802.3)

•Easy configuration, installation, operation, and maintenance.

•Integral web server for configuring, operating, and monitoring using an HTML-based web

browser GUI.

•Ethernet interface used with NMSs (Network Management Systems) or EMSs (Element

Management Systems) using SNMP (Simple Network Management Protocol) traps. Supports

MIB-II (Management Information Base II) and interWAVE enterprise MIB.

•ATPC (Automatic Transmit Power Control).

•Self Test, BER test mode, RF and digital loopbacks.

•Reed Salomon Forward Error Correction (FEC).

•Operating and backup software versions contained in Link CX memory, operator-selectable.

6 Link CX User Manual, Version A

1-4 Link CX Basic Structure

1-4.1 Radio Links

Each radio link includes two Link CX terminals. Each terminal consists of a Link CX radio with an integral

flat-panel antenna, or a Link CX radio with an external antenna (see Figure 1-1). Generally, the Link CX

terminals are mounted outdoors on a tower or building.

1-4.2 Data Stream

The DS-3 or Ethernet data signals enter the Link CX, and are modulated into the RF data stream. The RF

radio signal radiates from the local antenna and propagates to the remote antenna. At the remote

terminal, the received signal is demodulated and demultiplexed, separating the payload data and the

overhead management data.

1-4.3 Link CX Models

The Link CX is manufactured in many configurations:

•Versions with DS-3 or Ethernet carried over 5.3 GHz or 5.8 GHz links.

•Each version available with either an integral 30 x 30 cm (12 x 12 in.) antenna, or with an

N-type connector for a factory-supplied 61 cm (2 ft.) or 122 cm (4 ft.) external antenna, or

an N-type connector for a customer-supplied external antenna.

Link CX models are described in Table 1-1.

Table 1-1 Link CX Models

Model Transmi

t Band Frequency Band Link Carries Antenna

M100746-101

M100747-101

Low

High 5.25-5.35 GHz DS-3 Integral

M100748-101

M100749-101

Low

High 5.725-5.825 GHz DS-3 Integral

M100748-102

M100749-102

Low

High 5.725-5.825 GHz DS-3 External, 61 or 122 cm (2 or 4 ft.)

M100746-201

M100747-201

Low

High 5.25-5.35 GHz Ethernet

(45 Mbps) Integral

M100748-201

M100749-201

Low

High 5.725-5.825 GHz Ethernet

(45 Mbps) Integral

M100748-202

M100749-202

Low

High 5.725-5.825 GHz Ethernet

(45 Mbps) External, 61 or 122 cm (2 or 4 ft.)

System Description 7

1-4.4 Mounting and Antenna Alignment

To ensure proper mounting and antenna alignment interWAVE sells mounting brackets designed for use

with the Link CX. The single bracket mounts one Link CX, while the dual bracket mounts two Link CXs

back-to-back. Both brackets are designed to provide rugged mounting for the Link CX, while allowing

fine adjustment for antenna alignment.

1-4.5 Interface Connectors and Indicators

See Figure 1-3 for a view of the Link CX external connectors and indicators. The Link CX connectors

and indicators are described in Table 1-2.

Figure 1-3 Link CX Interface Connectors and Indicators

IW060203

1 POWER

2 CRAFT

3 RSSI

8 External Antenna

(on far side,

if equipped)

6 ETHERNET 2

7 ETHERNET 1

4 OUT

5 IN

9 LEDs

8 Link CX User Manual, Version A

Table 1-2 Link CX Interface Connectors and Indicators

No. Name Component Description From Note

1POWER

Male 4-Pin

Circular

Connector

Power input plug Power Supply Accepts ±21 to

±60 VDC

2 CRAFT

Female 4-Pin

Circular

Connector

RS-232

receptacle

Asynchronous

laptop port

1200 to 115,200 baud,

used only for tech

support troubleshooting

3 RSSI Female BNC

Connector

Receive Signal

Level Indicator Voltmeter

Verifies RF signal

strength, used to align

antenna

4OUT Female TNC

Connector

DS-3 data from

the radio link

DS-3 data

equipment --

5IN Female TNC

Connector

DS-3 data to the

radio link

DS-3 data

equipment --

6 ETHERNET 2

Female 4-Pin

Circular

Connector

10/100Base-T

transmit and

receive

receptacle

Ethernet

equipment

For Ethernet data or link

to SNMP or Web

manager, or use to

daisy-chain Ethernet

port to next Link CX in

cascade

7 ETHERNET 1

Female 4-Pin

Circular

Connector

10/100Base-T

transmit and

receive

receptacle

Ethernet

equipment (Same as ETHERNET 2)

8ANTENNA

PORT (Opt.)

Female

N-type

Connector

50 Ohm RF

receptacle

External

antenna

Only equipped on

external-antenna

models, on far side of

chassis

PWR/LCL ALM

RF LINK

DATA

ENET 2

ENET 1

Green LED

Power/Local

Alarm Status

Radio Link Status

DS-3 Status

Ethernet Status

ON = Power OK, no

alarm, Flashing = Local

alarm, OFF = Power off.

ON = Rcv. OK,

OFF = Link Alarm.

ON = OK (no LOS),

OFF = LOS.

ON = OK, Flashing =

data, OFF = No conn.

ON = OK, Flashing =

data, OFF = No conn.

Note: For connector pinouts, refer to Appendix 1.

System Description 9

1-4.6 Cables

To ensure longevity in a outdoor environment, interWAVE sells various cables designed for use with the

Link CX. interWAVE offers the following weather-resistant cables:

•DS-3 and Ethernet data cables and the power cables are offered in 25 m (82 ft.), 50 m

(164 ft.), and 100 m (328 ft.) lengths.

•A 6 m (19.7 ft.) Ethernet cable is available to route the Ethernet signal between two Link CXs

in the same location, or when you are configuring the Link CX from a Craft PC.

•For models to be used with external antennas, a 2 m (6.6 ft.) N-to-N RF cable is available to

connect the external antenna to the Link CX.

•A 6 m (19.7 ft.) RS-232 4-pin Circular-to-DB9 Craft cable is available to connect a Craft PC

to a Link CX for future CLI applications.

•When the Link CX is to be used with a StreamNet ATM Switch for a mesh backhaul network,

a 6 m (19.7 ft.) dual TNC-to-TNC cable is available to connect each StreamNet ATM Switch

to a Link CX.

All of the cables described above include weather-resistant connectors

and moisture-excluding gel inside the cable sheaths. For this reason,

interWAVE recommends that customers and installers not attempt to

shorten or splice the factory-supplied cables.

10 Link CX User Manual, Version A

1-4.7 Integral Antenna

The integral antenna is a 30 cm x 30 cm (12 in. x 12 in.) flat-panel antenna mounted directly on the

5.3 GHz or 5.8 GHz Link CX radio chassis, as shown in Figure 1-4. All RF connections between the

integral antenna and the Link CX radio are made internally, eliminating the need for external coaxial

cabling. Because the integral antenna is sealed onto the Link CX chassis, the Link CX and integral

antenna are mounted as a unit, and share the same environmental protection. An arrow on the

connector side of the Link CX chassis indicates the antenna polarization (either vertical or horizontal).

Figure 1-4 Integral Antenna and Link CX Radio

Integral

Antenna

Link CX

Radio

IW060201

System Description 11

1-4.8 External Antenna

Some 5.8 GHz Link CX models use an external antenna to radiate and receive RF signals. The antenna

attaches to the Link CX via a factory-supplied cable. The following sections describe factory- and

customer-supplied external antennas.

Factory-Supplied

The following external antennas are offered for use with the Link CX:

•61 cm (2 ft.) parabolic type

•122 cm (4 ft.) parabolic type

Figure 1-5 shows a typical 61 cm external antenna with N-type connector cabled to the Link CX radio.

The antenna type should be selected according to local regulatory rules and system gain requirements.

For the available antenna models refer to Table 1-3. Complete antenna specifications are provided in

Appendix 2.

Customer-Supplied

The Link CX can be ordered with a coaxial cable to be connected to a customer-supplied external

antenna. In this case, refer to the external antenna user documentation for specifications and model

numbers.

Table 1-3 Antenna Models

Model Description

091-455524-101 Parabolic antenna, 5.725-5.825 GHz, 61 cm (2 feet)

091-455548-101 Parabolic antenna, 5.725-5.825 GHz, 122 cm (4 feet)

12 Link CX User Manual, Version A

Figure 1-5 Typical Factory-Supplied External Antenna and 5.8 GHz Link CX Radio

IW060204

External

Antenna

Link CX

Radio

Factory-

Supplied

Coaxial Cable

System Description 13

1-4.9 Configuration, Operation, and Monitoring

The Link CX and radio link are configured, operated and monitored through one of five user interfaces.

The five interfaces are:

•A built-in web server GUI hosted by the Link CX, which can be accessed by any local or

remote computer equipped with a web browser. This is the interface most operators will use

to interact with the Link CX. The web browser can access the Link CX built-in web server

through either the ETHERNET 1 or ETHERNET 2 port.

•SNMP traps, which communicate with MIB-II compliant NMSs (Network Management

Systems) and EMSs (Element Management Systems). This interface is used by operators

who want real-time notification of radio problems. The Link CX sends SNMP traps to NMSs

and EMSs over Ethernet links through either the ETHERNET 1 or ETHERNET 2 port.

•An ASCII command line interface, accessible through the RS-232 CRAFT port, or through

the ETHERNET 1 or ETHERNET 2 port using telnet. This interface is primarily used by opera-

tors and interWAVE technical support personnel when performing detailed troubleshooting.

•The RSSI port, providing a DC voltage level proportionate to the received RF signal level, and

allowing installers to use a DC voltmeter to fine-tune antenna alignment. This interface is

primarily used during installation, but the current RSSI measurement is also available via the

Link CX built-in web server or via SNMP polls.

•Five LEDs that provide visual alarm status. They verify proper operation of the Ethernet

ports, DS-3 ports, and radio link, and indicate proper power input and radio operation.

These LEDs are usually used during installation to provide a quick product verification.

1-4.10 SNMP

The Link CX radio supports SNMP network management. SNMP is a protocol that defines the method of

communicating with and controlling network devices.

Devices that support the SNMP protocol can be queried for their status and other device information.

Some devices allow changing device settings or configurations using SNMP commands. The device

settings and other device data are available as variables. They are defined in the standard Management

Information Base (MIB) file, provided by the device manufacturer. The SNMP manager uses a database

to hold lists of variables that can be accessed for each device on the network. The device data can be

displayed in tables, graphs, or saved in a file.

1-4.11 Link CX Network Management Architecture

Link CX software network management is comprised of two main items:

•SNMP based Network Management System (NMS) application in the network management

workstation.

Note that the ETHERNET 1 and ETHERNET 2 ports are functionally

equivalent, and that they are both served by an onboard Ethernet

controller. The controller automatically switches polarity on the transmit

and receive pairs when they are reversed, eliminating the need for

crossover cables.

14 Link CX User Manual, Version A

•SNMP agent in the Link CX.

The workstation manages all Link CXs assigned unique IP addresses. The workstation also provides a

graphical display of the network objects showing the status, performance, and configuration parameters

of each Link CX radio.

The SNMP local agent is a standard MIB-II compliant software module that resides in each Link CX. The

agent collects information from different Link CX components as defined in the Management

Information Base (MIB) structure. The Link CX incorporates both standard and private MIBs.

Different Link CXs are distinguished by their customer-assigned IP addresses. The Web browser

communicates with the Link CX using TCP/IP and HTTP protocol.

The NMS data transfer between the manager and the agents is accomplished using either polling or

trapping techniques.

Polling

The NMS polls each Link CX SNMP agent at specific intervals. These are set according to user

requirements during SNMP NMS configuration.

Traps

The Link CX agent sends an SNMP trap to the manager whenever a predefined event occurs. Groups of

traps can be defined according to their level of severity. The operator can choose to enable or disable

any traps or group of traps according to their level of severity (and his or her own security level). Traps

can be logged using any standard SNMP manager.

1-4.12 NMS Connectivity

The NMS workstation can access any Link CX using its IP address. The NMS workstation can connect to

each Link CX using any of the following methods:

•10/100 Base-T Ethernet - accessing Link CXs via a LAN through hubs, switches or routers.

•Cascading Ethernet links transport NMS information between colocated Link CXs. This is

done by daisy-chaining the ETHERNET 1 and ETHERNET 2 ports between Link CX radios

using straight-pinned or crossover Ethernet cables.

1-4.13 Web-Based GUI Access Security

Access to the Web-based GUI (graphical user interface) is limited by username and password, which is

available at different levels of security as follows:

•User - Read only privilege.

•Administrator - Read/partial write privilege. The administrator cannot cause an radio link to

reset by changing critical parameters.

•Supervisor - Full read/write privilege.

System Description 15

1-4.14 GUI Functions

The Web-based GUI monitors and controls the main functions of the Link CX. These functions are listed

below and detailed in the following sections:

•Configuration management

•Status and fault management

•Test activation and monitoring

•Software downloading

•Performance monitoring

Refer to Appendix 3 for Link CX GUI operating instructions.

Configuration Management

The NMS software can be used to configure the parameters of the Link CX radio, although this is

normally done using a web browser GUI. This includes the setup of templates with predetermined

default values, relating to both the parameters of common element types and the validation of

parameter values. It also includes saving and loading configuration files for individual Link CX radios.

The NMS also controls the uploading and downloading of individual parameter values, and complete

configuration setups.

Parameter configuration is terminal-oriented. Every configuration session deals with the Link CX as

accessed by its particular IP address. Some of the parameters, such as RF channel number, link ID, etc.

affect the Link CXs on both ends of the radio link. Special care should be taken to activate the new

parameter values consistently on both ends of the radio link.

Status and Fault Management

Status and fault management involve a selective display of failures alerting the user to take actions

according to a decision making tree.

Some status indications and alarms may report conditions that pertain to both ends of the radio link.

These ends are commonly referred to as local and remote.

Test Activation and Monitoring

Following is a brief description of the tests that can be invoked and monitored by the Web based NMS.

Loopbacks

The loopbacks are incorporated into the radio to assist in detecting equipment/component/cable failure

during both installation and normal operations. Loopbacks are user initiated. Link CX supports RF and

various interface loopbacks.

Note that the ‘local’ system is the Link CX you are logged into, and the

‘remote’ Link CX is the one at the far end of the radio link. Thus, when

you are logged into the far end Link CX on a radio link that terminates

at your current physical location, the far end Link CX is ‘local’ and the

near end Link CX is ‘remote’.

16 Link CX User Manual, Version A

BER Test

The following Bit Error Rate (BER) test is provided by Link CX:

•Pseudo random signal generator - capable of inserting a standard test signal for BER

measurements, and local- and remote-end loopback functions.

•BER measurements of radio link performance under normal operating conditions.

Software Downloading

The Web-based user interface enables off-line operation and SNMP updates of files. Alternatively, when

on-line, configuration can be updated from the NMS to the Link CX agent. Another way to upgrade

multiple Link CXs is to use FTP.

Note that the Link CX can hold two software loads in memory, which facilitates upgrading and reverting

to a previous software version.

Certain factory default software settings are always retained at the Link CX to safeguard against complete

failure of communications caused by equipment restart.

Performance Monitoring

Each Link CX gathers various statistics regarding radio link performance. The Web based user interface

can retrieve and analyze these statistics upon demand. In addition, the Web based user interface

manager processes its own general statistical data, based on the information that is received. Current

BER, Receive Signal Strength Indicator (RSSI), and other performance monitors are available for the

radio link.

The Web-based user interface is designed to easily interface with optional graph management software

packages for sophisticated performance presentation.

1-5 Typical Applications

Link CX gives the user great flexibility in setting up point-to-point radio links on a very cost effective

basis, because it avoids unnecessary outlays in expensive leased lines or fiber optic land-based lines.

Low cost of ownership makes return on investment (ROI) attractive compared to leased lines.

Link CX advantages over copper/fiber alternatives include: short installation time, easy maintenance

using NMS software, independence of competing PTTs, avoiding the need to secure normal

right-of-way and/or physical installation permits, and redeployable depending on changing needs.

The simplicity of the Link CX installation makes it easy for the user to implement Link CX in a variety of

applications. It also means that the user can conveniently move a previously installed Link CX to a new

location to meet the requirements of a changing system. Link CX enables seamless future software

upgradability, protecting customer investment, reducing logistics, spare parts and product stocking. The

following sections briefly describe typical applications.

System Description 17

1-5.1 Internet (ISP)

The appetite for higher Internet access speeds require faster ISP access and backhaul and ISP

connections to businesses. The Link CX radio is perfectly suitable for both backbone and direct

end-user connectivity.

1-5.2 Private Network Wireless Bridged LANs and WANs

Link CX radios are also used to provide communications links for private networks. For companies

requiring frequent communications into areas without extensive telecommunications infrastructure or in

areas where the cost of local access is high, installing and maintaining a Link CX radio network can be

very cost effective. Typical users of private networks include: government agencies such as land

management, municipal agencies, and universities; large utilities such as oil, gas, and electric concerns;

and companies with widely deployed assets such as railroads and timber resource managers.

1-5.3 PCS/PCN and Cellular Networks

Cellular operators mainly use Link CX radio links for Base Transceiver Station (BTS) interconnections,

BTS to Base Station Controller (BSC), and BSC to BSC interconnections.

1-5.4 Wireless Local Loop Networks and Local Exchange Bypass

Wireless systems in emerging markets were originally deployed to provide premium services to a

mobile subscriber base. However, middle and lower income countries have driven mobile network

providers into a new business - the substitution of wireless service for fixed service, so-called fixed

wireless networks, providing a cost-effective solution in situations where no wireless infrastructure

exists. Wireless local loop (last mile) networks are implemented mostly by Local Exchange Carriers

(LECs).

Alternative carriers, such as Competitive Access Providers (CAPs) and Competitive Local Exchange

Carriers (CLECs) use radio links to establish standard telecommunications links between their

customers’ sites and their own backbone networks. This way CAPs and CLECs provide their customers

with cost-effective local area telephone service and cheaper long distance services.

1-5.5 Business Bypass and Local Exchange Bypass

The Link CX radio is a perfect solution for Business Bypass and Local Exchange Bypass applications.

18 Link CX User Manual, Version A

1-5.6 Backhaul for Wireless MTU and MTU Access

The Link CX radio can be used as an infrastructure element in wireless Multiple Tenant Unit (MTU) and

Multiple Dwelling Unit (MDU) applications, when used with interWAVE StreamNet products. Figure 1-6

shows a typical wireless MTU/MDU access configuration.

Figure 1-6 Typical Wireless MTU/MDU Access Configuration

IW142201

StreamNet

2400

StreamNet

2400

StreamNet

2400

To AT M

Network

Link CX

Radio

Link CX

Radio

Link CX

Radio

Link CX

Radio

45 Mbps

DS-3

ATM-Fed

DSLAM IAD IAD

10-BaseT POTS x 16 10-BaseT POTS x 16

Link CX

Radio

45 Mbps

System Description 19

1-5.7 Wireless Mesh Backhaul Networks

2.5G and 3G cellular systems, which integrate voice and data, require higher-capacity backhaul, QoS

(Quality of Service), BoD (Bandwidth on Demand), ability to dynamically load balance bursty traffic, and

provide support for legacy 1G and 2G systems. When used with interWAVE StreamNet ATM Switches,

the Link CX can provide the radio links for a self-healing wireless mesh backhaul network to support

broadband ATM communications to support this application. These networks feature high reliability,

lower maintenance costs, improved scalability, and enhanced interference mitigation.

DSL providers are typically limited by the quality of existing copper lines to a short distance from the CO

(Central Office). To serve customers farther from the CO, DSLAMs (DSL Access Modules) must be used

closer to the customer site. The backhaul from DSLAMs to the CO has to be robust to reduce or

eliminate downtime, and must have sufficient bandwidth to support DSL traffic. When used with

StreamNet ATM Switches, the Link CX can provide the radio links for a self-healing wireless DSLAM

mesh backhaul network to support these requirements. See Figure 1-7 for a typical wireless mesh

backhaul network.

Figure 1-7 Typical Wireless DSLAM Mesh Backhaul Network

IW086201

High-Capacity Radio

Low-Capacity Radio

Switch Node/DSLAM

POP Aggregator

20 Link CX User Manual, Version A

1-5.8 Wireless ATM Mesh Distribution with StreamNet

When used with interWAVE StreamNet ATM Switches, the Link CX can provide the radio links for a

self-healing wireless ATM mesh backhaul network to support broadband communications. These

networks feature high reliability, lower maintenance costs, improved scalability, and enhanced

interference mitigation. See Figure 1-8 for a typical wireless ATM mesh backhaul network.

1-6 Specifications

Refer to Appendix 2 for Link CX specifications.

Figure 1-8 Typical Wireless ATM Mesh Backhaul Network

IW134205

Link CX 5.8

Link CX 5.3

POP

2H 5.3

2H 5.32H 5.3 1V 5.3

1V 5.3

2V 5.8

1H 5.8 1H 5.8

1H 5.8

StreamNet

SAI

Installation Steering Guide 21

Two

Installation Steering Guide

20000

This chapter briefly outlines the complete installation and configuration procedure for the Link CX, and a

flowchart of this process is given. The topics discussed here are presented in detail in subsequent

chapters of this manual.

2-1 Installation Flow Chart

The flow chart in Figure 2-1 includes references to the installation and troubleshooting sections in this

manual.

22 Link CX User Manual, Version A

Figure 2-1 Installation Flowchart

Start

IW017201

Not OK

Section 4-1

Before Installing

Section 4-4 External Antenna

Installation (Optional)

Section 4-3

Mounting the Link CX

Chapter 5

Final Link CX Configuration

Section 4-7

Acceptance Testing

Chapter 7

Troubleshooting

End

Chapter 3

Planning the Installation

Section 4-2

Initial Configuration

Section 4-5 Completing the

Link CX Installation

Section 4-6

Aligning the Antenna

Installation Planning 23

Three

Installation Planning

30000

This chapter provides a comprehensive planning guide for Link CX installations, and includes a Radio

Link Planning Worksheet that should be filled out for each radio link. Fill out a copy of the Radio Link

Planning Worksheet before continuing with Chapter Four.

In addition, this chapter provides an introduction to Network Management System (NMS) software and

configuration issues.

This chapter contains the following sections:

•Section 3-1, Planning a Link CX Network

•Section 3-2, Site Planning

•Section 3-3, Planning Element and Network Management Ethernet Links

•Section 3-4, Planning DS-3 Links

•Section 3-5, Power Planning

•Section 3-6, Transmit Power Planning

•Section 3-7, Radio Link Planning

3-1 Planning a Link CX Network

As described in Section 1-5, the Link CX can be used to support a number of applications. However, the

two most common configurations are point-to-point and mesh network. Point-to-point configurations

(Figure 1-1) are easiest to plan and implement, as the radio links merely transmit industry-standard

formatted data from one location to another. Mesh network configurations (Figure 1-7) use interWAVE

StreamNet ATM Switches to create networks that feature high reliability, low maintenance cost,

improved scalability, and enhanced interference mitigation.

Both configurations use common point-to-point radio links, so the point-to-point radio link planning can

also be applied to mesh network configurations. Generally, the common points to consider when

planning a Link CX network are:

•Line of Sight: Unlike some frequency bands, the Link CX radios must be within line of sight

of each other. That is, the far-end antenna must be visible from the near-end antenna. If

there are trees, buildings, mountains, or other obstructions between the two antennas, the

Make sure that you read through this chapter, and make a copy of and

fill out the Radio Link Planning Worksheet in Section 3-7 before you

continue with the Link CX installation.

24 Link CX User Manual, Version A

Link CXs on each end of the radio link will be unable to communicate with each other. Make

sure the Link CX radios used in each radio link are within line of sight of each other. Refer

also to the Fresnel Zone Clearance section that follows.

•Fresnel Zone Clearance: There must be sufficient open space around the direct line of

sight to minimize interference with the radio beam. At a minimum, 60% of the first Fresnel

zone of the path should be clear.

Even with clear line-of-sight, objects still may be near enough to the transmission path to

cause problems. Obviously, objects that stand directly in the transmission path obstruct the

beam, causing a drop in signal strength at the receiving end; in addition, objects and

reflective surfaces that are in near proximity to the path can cause signal interference and

attenuation of the received signal.

Fresnel zones define the amount of clearance required for obstacles. These zones are series

of concentric ellipsoid surfaces that surround the straight-line path between the two

antennas. The first Fresnel zone is defined as the surface containing every point for which

the distance from the transmitter to any reflection point on the surface and then on to the

receiver is one-half wavelength longer than the direct signal path.

The following equation shows that Fresnel zones are a function of the transmission

frequency, path length, and location along the path:

Where:

Fl = First Fresnel zone radius in meters

d1= Distance from transmitter to reflection point in kilometers

d2 = Distance from reflection point to receiver in kilometers

D = Length of direct signal path in kilometers

f = Transmission frequency in GHz.

An envelope at six-tenths of the first Fresnel zone (referred to simply as the Fresnel Zone

Clearance) defines the minimum acceptable clearance of an obstacle (see Figure 3-1). The

formula for the Fresnel Zone Clearance is shown after Figure 3-1.

F1 17.3 d1d2

------------ Fresnel Zones formula=

Installation Planning 25

Where:

Fl = First Fresnel zone radius in meters

d1= Distance from transmitter to reflection point in kilometers

D = Length of direct signal path in kilometers

d2 = D - d1

f = Transmission frequency in GHz.

Figure 3-1 shows that the Fresnel zone radius is greatest at midpath. It is at this point that the

required obstacle clearance is greatest. The equation given previously yields the 0.6F1

minimum beam clearance envelope values at midpath as shown in Table 3-1. Also use the

equation to calculate the necessary minimum beam clearance envelope for other obstacles

along the path, especially near both endpoints of the path.

Figure 3-1 Fresnel Zone Clearance

Direct Path .6F1 Envelope

d1 d2

IW100201

0.6F1 10.4 d1d2

------------ Fresnel Zone Clearance formula=

26 Link CX User Manual, Version A

•Multipath Fading: See Figure 3-2. Because a Link CX terminal typically transmits its stron-

gest signals in a cone-shaped pattern, some of the signal may be reflected from a nearby

building, from water under the signal path, or from other RF reflectors. This reflected signal

can then be received by the far-end Link CX and superimposed on the main signal, usually

degrading the signal strength. To avoid multipath fading, interWAVE recommends that you

install the Link CX antenna on the back, rather than the front, of buildings to avoid multipath

fading from water or other ground-level surfaces, and that you plan radio links away from

nearby buildings.

Table 3-1 Beam Clearance Envelope at Midpath

Path Distance Midpath Minimum Beam Clearance Envelope (Note)

2 km 7 m

5 km 11 m

10 km 15 m

20 km 21 m

32 km 27 m

1 mile 20 ft

3 miles 34 ft

6 miles 48 ft

12 miles 69 ft

20 miles 88 ft

Note: The minimum beam clearance envelope is defined by the radius around the direct path

shown in Figure 3-1, within which there must be no obstacles.

The Fresnel zone surrounds the direct signal path, so it affects objects to

the side of the path as well as objects directly in the path.

Installation Planning 27

•External Interference: Because the Link CX operates in an unlicensed band, interWAVE

strongly recommends that you use a spectrum analyzer at both ends of planned radio links,

with the receiving antenna as close to the proposed Link CX antenna mounting spot as

possible. Use a polarized antenna, and scan for both horizontally- and vertically-polarized

interfering radiation. If you find external interference in either of the two (High or Low)

bands, configure the Link CX for the least-impacted band. Refer to Table 3-3 for the High

and Low bands for the Link CX radio.

Figure 3-2 Preventing Multipath Fading from Ground-Level Surfaces

Line of Sight

Transmission Path

IW086202

B. Link CXs Mounted on Back of Building Eliminate Multipath Fading

A. Link CXs Mounted on Front of Building Experience Multipath Fading

Line of Sight

Transmission Path

Multipath

Reflection

Multipath

Reflections

Building

BuildingBuilding

Building

28 Link CX User Manual, Version A

3-2 Site Planning

Each proposed Link CX terminal site requires a site survey and plan for the following:

•Power: The Link CX radio requires a +/-21 to +/-60 VDC power source. Make sure

required power supply is available before installing the Link CX.

•Mounting Point: The Link CX is usually mounted on a vertical mast or pole mounted on a

building or a tower. The Link CX mounting bracket can accommodate a 4.5- to 11.5-cm

(1.75- to 4.5-in.) diameter mast or pole.

When the Link CX is equipped with an external antenna, the antenna and the Link CX radio

should be mounted so the factory-supplied 2 m (79 in.) can be used to connect the antenna

to the Link CX.

•Grounding and Lightning Protection: The Link CX radio requires adequate grounding

and lightning protection. If the mounting point described above provides adequate lightning

protection, the Link CX radio will still need a good earth ground to a bare-metal earth

ground. Refer to Appendix 4 for detailed grounding and lightning protection

recommendations.

•Cable Routing: The Link CX DS-3 and/or Ethernet data cables connect associated external

equipment to the Link CX radio. Before installation, procure cable ties and/or standoffs to

route and to create service loops for these cables.

•Physical Security: The Link CX radio is typically mounted high enough to prevent casual

tampering. The Link CX radio is further protected by anti-tampering chassis screws that

prevent most casual attempts to open the chassis.

3-3 Planning Element and Network Management Ethernet Links

The Link CX communicates with SNMP-based Element Management Systems and Network

Management Systems over Ethernet communication links. Because the Link CX contains two

independent switched Ethernet ports, each Link CX can be connected directly to an Ethernet switch or

router, and colocated Link CXs can be cascaded. Figure 3-3 shows some common arrangements for the

EMS and/or NMS Ethernet links.

The cable run from the Ethernet switch or router to the Link CX must be 100 m (328 ft.) or less, and can

be straight-through or crossover, because the Link CX Ethernet ports automatically detect the transmit

and receive pairs and switch them if necessary. interWAVE sells 25 m (82 ft.), 50 m (14 ft.), and 100 m

(328 ft.) Ethernet cables with the correct connectors for these links, as described in Section 1-4.6.

Alternatively, when Link CXs are to be cascaded as shown in Figure 3-3 (B), interWAVE sells a 6 m

(20 ft.) Ethernet cable with the correct connectors for the Link CX-to-Link CX links, as described in

Section 1-4.6.

Note that the EMS or NMS must be within eight or fewer Ethernet hops of the Link CX for proper

communications.

Installation Planning 29

Figure 3-3 Typical EMS/NMS Ethernet Connections

Ethernet Backbone

IW142202

A. DS-3 Link CXs at Different Locations

EMS/NMS

B. Colocated DS-3 Link CXs

EMS/NMS

Switch/

Router

Ethernet

C. Colocated Ethernet Link CXs

EMS/NMS

Ethernet

Switch

30 Link CX User Manual, Version A

3-4 Planning DS-3 Links

The Link CX DS-3 versions use paired 75 Ohm cables with male TNC connectors for the transmit and

receive data from external DS-3 equipment. interWAVE sells 25 m (82 ft.), 50 m (14 ft.), and 100 m

(328 ft.) DS-3 cables with the correct connectors for these links, as described in Section 1-4.6.

Alternatively, when a StreamNet ATM Switch is connected to the Link CX, interWAVE sells a 6 m (20 ft.)

DS-3 cable with the correct connectors for this link, as described in Section 1-4.6.

3-5 Power Planning

interWAVE sells 25 m (82 ft.), 50 m (14 ft.), and 100 m (328 ft.) power cables with the correct

connectors for Link CX power, as described in Section 1-4.6.

Installation Planning 31

3-6 Transmit Power Planning

The Link CX normally uses a manually-set output power level. When Automatic Transmit Power Control

(ATPC) is enabled, the far-end Link CX terminal provides feedback to the near-end Link CX to lower the

transmit power to the lowest level required for clear data transmission.

Transmit power can be attenuated by 40 dB for initial configuration and interference isolation. Also, a

maximum transmit power level can be set (whether or not ATPC is enabled) to prevent interference with

other RF receivers.

3-6.1 Maximum Link CX Power Output

Since the Link CX can be ordered in a number of configurations, with different gains for each of the

associated antennas, use the Table 3-2 to determine the maximum power output. Note that the

factory-supplied external antenna attenuates the maximum power output by approximately 0.5 dB.

3-6.2 Calculating the Required Transmit Power

The Link CX will normally use the maximum transmit power listed in Table 3-2, but may need to be

attenuated when there are other receivers beyond the remote Link CX terminal (for instance, in a mesh

network). In this case, the professional installer must use the free-space calculation to determine the

actual Maximum Transmit Power to prevent interference.

Table 3-2 Maximum Power Output by Model Configuration

Model Frequency Band Link

Carries Antenna Max Tx Power

M100746-101

M100747-101

M100746-201

M100747-201

5.25-5.35 GHz

DS-3 or

Ethernet

(45 Mbps)

Integral -1 dBm +21 dBi =

+20 dBm Average EIRP

M100748-101

M100749-101

M100748-201

M100749-201

5.725-5.825 GHz

DS-3 or

Ethernet

(45 Mbps)

Integral +16 dBm +21 dBi =

37 dBm EIRP

M100748-102

M100749-102

M100748-202

M100749-202

External, 61 cm (2 ft.)

+16 dBm +28 dBi

-0.5 dB = 43.5 dBm

EIRP

M100748-102

M100749-102

M100748-202

M100749-202

External, 122 cm (4 ft.)

+16dBm +34.6dBi

-0.5 dB = 50.1 dBm

EIRP

32 Link CX User Manual, Version A

3-7 Radio Link Planning

As described in Section 1-4, each radio link requires one Link CX at each end of the link. Before you

start installing your Link CXs, fill in the following information for both ends of the radio link:

Table 3-3 Radio Link Planning Worksheet

Link CX 1 - High Band Link CX 2 - Low Band

Information Common to Both Link CX Radios

Radio Link Name:

Radio Link Information:

Radio Link Polarization (pick one, must be the same for both): HORIZONTAL VERTICAL

Radio Link Payload (as ordered, must be the same for both): DS-3 Ethernet

Information Unique to Each Link CX Radio

Model Number

(see Link CX Label & Table 1-1)

M1007 _ _ - _ 0 _

(high band)

M1007 _ _ - _ 0 _

(low band)

Antenna Type

(pick one)

Integral

61 cm (2 ft.)

122 cm (4 ft.)

Integral

61 cm (2 ft.)

122 cm (4 ft.)

Radio Link Channel and Band

Center Frequency (pick one pair,

must be different)

Channel 1 High Band,

5.3 GHz: Tx--5.322 GHz/

Rx--5.262 GHz (default)

Channel 1 Low Band,

5.3 GHz: Tx--5.262 GHz/

Rx--5.322 GHz

Channel 2 High Band,

5.3 GHz: Tx--5.338 GHz/

Rx--5.278 GHz

Channel 2 Low Band,

5.3 GHz: Tx--5.278 GHz/

Rx--5.338 GHz

Channel 1 High Band,

5.8 GHz: Tx--5.797 GHz/

Rx--5.737 GHz (default)

Channel 1 Low Band,

5.8 GHz: Tx--5.737 GHz/

Rx--5.797 GHz

Channel 2 High Band,

5.8 GHz: Tx--5.813 GHz/

Rx--5.753 GHz

Channel 2 Low Band,

5.8 GHz: Tx--5.753 GHz/

Rx--5.813 GHz

Transmit Attenuation

(default = Disable) Enable Disable Enabled Disable

Maximum Transmit Power

(refer to Section 3-6.2) __ dBm __ dBm

Automatic Tx Power Control

(refer to Section 3-6) Enable Disable Enabled Disable

Installation Planning 33

IP Address (must be different,

obtain from IP network planner) _ _ _ . _ _ _ . _ _ _ . _ _ _ _ _ _ . _ _ _ . _ _ _ . _ _ _

Subnet Mask (obtain from IP

network planner) _ _ _ . _ _ _ . _ _ _ . _ _ _ _ _ _ . _ _ _ . _ _ _ . _ _ _

Default Gateway (obtain from IP

network planner) _ _ _ . _ _ _ . _ _ _ . _ _ _ _ _ _ . _ _ _ . _ _ _ . _ _ _

RSSI Alarm Level

(default = -70 dBm) - __ dBm - __ dBm

Alarm on Loss of DS-3 or

Ethernet Input Signal Enabled Disable Enabled Disable

characters, including numbers

and ! $ ‘*+-_)

characters, including numbers

and ! $ ‘*+-_)

Allow Login From IP Addresses

(don’t forget Craft PC)

Any (default) -OR-

_ _ _ . _ _ _ . _ _ _ . _ _ _

Any (default) -OR-

_ _ _ . _ _ _ . _ _ _ . _ _ _

SNMP Trap Community

(default = public, up to 19 ASCII

characters starting with an alpha

character, including numbers

and - _ .)

Send SNMP Traps to

_ _ _ . _ _ _ . _ _ _ . _ _ _

Read/Write Community

(default = public, up to 19 ASCII

characters starting with an alpha

character, including numbers

and - _ .)

Allow Read/Write Access From

Any (default) -OR-

_ _ _ . _ _ _ . _ _ _ . _ _ _

Any (default) -OR-

_ _ _ . _ _ _ . _ _ _ . _ _ _

Table 3-3 Radio Link Planning Worksheet (continued)

Link CX 1 - High Band Link CX 2 - Low Band

34 Link CX User Manual, Version A

Read-Only Community

(default = public, up to 19 ASCII

characters starting with an alpha

character, including numbers

and - _ .)

Allow Read-Only Access From Any (default) -OR-

_ _ _ . _ _ _ . _ _ _ . _ _ _

Any (default) -OR-

_ _ _ . _ _ _ . _ _ _ . _ _ _

System Name

(optional, up to 255 ASCII

characters)

System Contact Information

(optional, up to 255 ASCII

characters)

System Location

(optional, up to 255 ASCII

characters)

Table 3-3 Radio Link Planning Worksheet (continued)

Link CX 1 - High Band Link CX 2 - Low Band

Installing the Link CX 35

Four

Installing the Link CX

40000

This chapter describes the physical installation of the Link CX. Each Link CX consists of an outdoor

pole-mounted radio with integral antenna or optional external antenna. If so equipped, the Link CX radio

is connected to the external antenna with a factory-supplied coaxial cable.

This chapter covers the following topics:

•Section 4-1, Before Installing, includes general guidelines, equipment unpacking, inventory

and tools

•Section 4-2, Initial Configuration, includes all the steps necessary to configure the Link CX

radio before mounting it (and its optional external antenna) on the pole

•Section 4-3, Mounting the Link CX, includes steps for installing the Link CX (and its optional

external antenna) on the pole

•Section 4-4, External Antenna Installation (Optional), includes optional external antenna

installation steps

•Section 4-5, Completing the Link CX Installation, describes installed Link CX cabling and

grounding

•Section 4-6, Aligning the Antenna, includes Link CX antenna alignment steps

•Section 4-7, Acceptance Testing, includes Link CX acceptance tests

This chapter describes initial configuration and installation of the Link CX hardware. After completing

this chapter, the installer should proceed to Chapter Five to perform a final configuration on the Link CX

radio after hardware installation.

For faster installation, make sure you have a filled-out copy of the Radio

Link Planning Worksheet from Chapter Three before continuing with

the rest of this chapter.

This device must be professionally installed.

36 Link CX User Manual, Version A

4-1 Before Installing

4-1.1 General Guidelines

The installation, maintenance, or removal of antenna systems requires qualified, experienced personnel.

Link CX installation instructions have been written for such personnel.

Since Link CX is easy to install, a previously installed Link CX can be conveniently moved to a new

location. Re-deployment allows the user to meet the requirements of a changing system with minimal

effort and expense. Thus, installation personnel should assume that the activities described in this

chapter are not one-time procedures but will have to be repeated from time to time.

This manual assumes that the site power and grounding have already been installed. This manual also

assumes that the antenna mounting pole has been installed before installing the Link CX. When

installing and aligning a Link CX radio or associated radio link, the user should always have on hand the

required tools, test equipment and any other required miscellaneous installation devices and materials.

interWAVE disclaims any liability or responsibility for the results of improper or unsafe installation

practices.

This device is to be exclusively used for fixed point-to-point operation

with directional antennas.

Before you continue with this installation, make sure you have a

filled-out copy of the Radio Link Planning Worksheet found in

Section 3-7.

Before installing the Link CX radio, it is recommended that installation

personnel read this chapter in its entirety. If installation personnel are

unfamiliar with the radio components, we recommend reading

Chapter One. After reading through the full installation procedure,

installation personnel may proceed to the relevant sections in this

chapter.

The Link CX electronics have been designed to be maintenance free,

and the outdoor components are very rugged. However, because of

continued exposure to weather, it is recommended that qualified

personnel inspect antenna systems once a year to verify proper

installation, maintenance, and condition of equipment.

Installing the Link CX 37

4-1.2 Equipment and Unpacking

Each Link CX radio is shipped with the Link CX User’s Manual on CD-ROM, and a separate box contains

the optional 5.8 GHz external Antenna Mount Assembly, U-bolts and antenna with tube attachment.

Unpack each box and examine the exterior of each unit for any visible damage. If visible damage is

detected, immediately contact your sales representative or interWAVE Customer Support.

The equipment shipped (Link CX radio with or without external antenna) depends on the specific

purchase order as described in Table 1-1.

4-1.3 Packing Lists and Orderable Parts

Each packing carton is accompanied by a packing list. Verify the contents of the carton against the

packing list. Regardless of the packing list parts described here, the shipped packing list is binding.

Note the warranty sticker on the Link CX. The Link CX radio is sealed at the factory. Tampering with

these seals voids the warranty.

See Figure 4-1 for a picture of the orderable Link CX parts, and see Table 4-1 for a high-level

description of the orderable parts.

interWAVE suggests that the user retain at least one (1) of each packing

carton with all its packing materials. In the event that it is necessary to

return a unit, the user will have the required packing material for safe

shipment.

38 Link CX User Manual, Version A

Figure 4-1 Link CX Orderable Parts

9A, 9B 10

6 7 8

5B5A

2C2B2A

IW093201

(Graphic

TBD)

Installing the Link CX 39

Table 4-1 Link CX Radio Orderable Parts

Item Qty Part Number Description See Also

1A 1 See Table 1-1 Link CX Radio, Integral Antenna Section 1-4.3

1B 1 See Table 1-1 Link CX Radio, External Antenna Section 1-4.3

2A 1 100607-001 Non-Adjustable Elevation Single

Link CX Radio Bracket Section 1-4.4

2B 1 100680-001 Adjustable Elevation Single Link CX

Radio Brackets Section 1-4.4

2C 1 100694-001 Adjustable Elevation Dual Link CX

Radio Brackets Section 1-4.4

3 1 AC100008

Optional 2 m (6.5 ft.) N-to-N External

Antenna RF Cable (required for some

5.8 GHz Link CX models)

Section 1-4.6

TBD

61 cm (2 ft.)

122 cm (4 ft.)

Optional Single

Polarization

External Parabolic

Antenna with

Mounting Bracket

Section 1-4.6

5A 1

100763-001

100764-001

100765-001

25 m (82 ft.)

50 m (164 ft.)

100 m (328 ft.)

DS-3 Payload Data

Cables and Power

Cable Kit

Section 1-4.6

5B 1

100766-001

100767-001

100768-001

25 m (82 ft.)

50 m (164 ft.)

100 m (328 ft.)

10/100 Ethernet

Payload Data Cable

and Power Cable Kit

Section 1-4.6

6 1 100655-001 6 m (19.7 ft.) Link CX-to-Link CX 10/100

Ethernet Crossover Cable Section 1-4.6

7 1 100588-003

6m (19.7ft.) Dual 75Ohm DS-3

TNC-to-TNC StreamNet ATM Switch

Ethernet Cable

Section 1-4.6

8 1 100586-001 Optional 6 m (19.7 ft.) Craft PC 4-pin

Circular-to-DB9 RS-232 CLI Cable Section 1-4.6

9A 1 TBD

Optional Transtector Lightning Arrestor

Kit used at the cable entry to the Power,

DS-3 and Ethernet Equipment Structure

Appendix 4

9B 1 TBD

Optional Transtector Lightning Arrestor

Kit used at the cable entry to the 10/100

Ethernet and Power Equipment

Structure

Appendix 4

10 1 100757-001 User Manual CD-ROM Preface

40 Link CX User Manual, Version A

4-1.4 Installation Tools and Materials

Tools

The user should have at least the following tools on hand before installing the Link CX radio:

Materials

Refer to Section 4-1.3 and collect the following materials:

•For DS-3 models:

•DS-3 coaxial cables to the Link CX.

•Ethernet data interface cables to the Link CX.

•For Ethernet models:

•Ethernet data interface cables to the Link CX.

•For all models:

•Power cable to the Link CX.

•Dual DS-3 coaxial cables to the StreamNet ATM Switch or other equipment.

•Optional RS-232 cable to Craft PC command line interface. (Future option.)

•Standoffs and/or tie wraps (or similar) for fastening cables.

•Vinyl (or equivalent) electrical tape.

•Butyl rubber amalgamating connector sealing tape.

•Customer-supplied solid wire or tape (not braided) grounding wire.

•Lightning arrestors.

•Optional 2 W, 50 Ohm load with N-Type connector used during initial configuration of

Link CXs with external antennas.

Table 4-2 Required Installation Tools

Tools Purpose

13 mm (11/16 in.) and YY mm (XX in.)

and RR mm (SS in.) torque wrench

Tighten the pole mount assembly to the pole

and tighten the alignment lockdown bolts

Optical aid or compass (optional) For coarse antenna azimuth alignment

Vertical level (optional) For coarse antenna elevation alignment

Hand-held voltmeter, including cable with

BNC adapter Fine-tune the antenna alignment

Large Flat-Blade Screwdriver Tighten the steel band clamps, when required

Installing the Link CX 41

4-2 Initial Configuration

interWAVE strongly recommends that the installer configure the Link CX at a depot or on-site before it is

mounted in its final location. This section includes instructions on how to configure the Link CX before it

is installed.

4-2.1 Connecting a Craft PC to the Link CX

The equipment used to configure the Link CX is a Craft PC with 10/100 Ethernet port and cable,

equipped with any current web browser and Adobe Acrobat Reader software. Figure 4-2 shows how to

connect the Craft PC and power to the Link CX for initial configuration.

Perform the following steps:

1(Only for Link CXs with external antennas.) When you are configuring a Link CX with an

external antenna, connect the external antenna or a 2 W, 50 Ohm load to the antenna port.

This prevents harm to the Link CX internal circuits should full RF power be applied without a

load.

2If necessary, use the instructions provided with your Craft PC operating system to change

the Craft PC ethernet address to 10.0.0.1.

3Turn off power to the Craft PC to prevent damage to the Ethernet port receive circuitry.

4Using a factory-supplied ethernet cable, connect an Ethernet-port equipped Craft PC to the

Link CX as shown in Figure 4-2.

5MAKE SURE the antenna is pointing away from your work area before you apply power to

the Link CX, and MAKE SURE you stay at least 2 m (79 in.) from the front of the antenna

while the Link CX is connected to power.

6Using a factory-supplied power cable, connect an external power supply to the Link CX as

shown in Figure 4-2.

7Turn on power to the Craft PC and verify that the Ethernet port is active. Note that the

Link CX Ethernet switch will auto-detect transmit and receive pairs, and you should detect an

Ethernet connection within a few seconds of port activation.

The Link CX is now powered on and transmitting RF, and the Craft PC is now ready to log onto the

Link CX internal web main page.

Because you can expose yourself to harmful RF radiation any time the

Link CX is powered up, do not stand within 2 m (79 in.) of the antenna

during Link CX operation. The installer is responsible for ensuring that

the antenna is mounted in a place inaccessible to the public.

For faster configuration, make sure you have a filled-out copy of the

Radio Link Planning Worksheet from Chapter Three before continuing

with the rest of this section.

42 Link CX User Manual, Version A

4-2.2 Logging In to the Link CX Built-In Web Server

After you have connected and powered up the Link CX and the Craft PC as described in Section 4-2.1,

use the web browser on the Craft PC to log into the Link CX built-in web server as follows:

8Launch the web browser per the manufacturer’s instructions.

9Open the web page at ethernet address 10.0.0.2 (transmit low models) or 10.0.0.3 (transmit

high models) in the web browser.

If the web browser ethernet address has been changed, use the replacement ethernet

address instead of 10.0.0.x..

10 If the Link CX has not been configured for a login and password, continue with Step 11. If

the Link CX has already been configured for a login and password, enter both and continue

with Step 11.

11 The web browser displays the Monitor Page, similar to the one shown in Figure 4-3. Note

that the values shown for each of the parameters will vary, depending on the state of the

Link CX.

Figure 4-2 Link CX Configuration Setup

IW093202

Craft PC

Mil-Type

Connector

CAT-5 Ethernet

Cable

RJ-45 Ethernet

Port

From +/-21 to

+/-60 Vdc Supply

Installing the Link CX 43

Figure 4-3 Typical 5.8 GHz Link CX Monitor Web Page

44 Link CX User Manual, Version A

12 On the Monitor page, select the link for the Commission Radio page. The web browser

displays the Commission Radio page, similar to the sample shown in Figure 4-4.

13 Using the data entered on the filled-out copy of the Radio Link Planning Worksheet from

Chapter Three, select the planned configuration choices available on this page, except the

final Tx Attenuation and the Automatic Tx Power Control values. Enable the Tx Attenuation

and disable the Automatic Tx Power Control for now.

14 Click Submit Changes to upload changes to the Link CX.

15 On the Commission Radio page, select the link for the Commission Interfaces page. The web

browser displays the Commission Manager Interfaces page, similar to the sample shown in

Figure 4-5.

16 Using the data entered on the filled-out copy of the Radio Link Planning Worksheet from

Chapter Three, select the planned configuration choices available on this page.

Figure 4-4 Typical 5.8 GHz Link CX Commission Radio Web Page

The Link CX is shipped with Tx Attenuation disabled. Enable Tx

Attenuation until the rest of the Link CX configuration steps are

completed.

Installing the Link CX 45

17 Click Submit Changes to upload changes to the Link CX.

18 On the Commission Manager Interfaces page, select the link for the Test page. The web

browser displays the Test page, similar to the sample shown in Figure 4-6.

19 On the Test page, select the BERT + Radio Loopback test, and select One Minute. Select

Start Test to verify the internal Link CX circuitry before installation.

When the BERT + Radio Loopback test is complete, the Link CX has been configured, and

the internal signal generation, transmit, receive, and detecting circuitry of the Link CX has

been tested. Continue with Step 18.

20 On the Test page, select the link for the Commission Radio page. The web browser again

displays the Commission Radio page, similar to the sample shown in Figure 4-4.

21 On the Commission Radio page, set the Tx Attenuation to disabled. This causes the Link CX

to transmit at the level set by the Maximum Transmit Power parameter.

22 Disconnect power from the Link CX to prepare it for mounting in its final location.

23 Disconnect the Craft PC from the Link CX.

24 (Only for Link CXs with external antennas.) When you have configured a Link CX with an

external antenna, disconnect the external antenna or 50 Ohm load from the antenna port.

This makes it easier to mount the Link CX and the external antenna in their final locations.

After completing this section, the Link CX radio is configured and partially tested, and is ready to install

as described in Section 4-3.

Do not stand within 2 m (79 in.) of the front of the antenna during

Link CX operation to avoid harmful RF radiation.

46 Link CX User Manual, Version A

Figure 4-5 Link CX Commission Manager Web Page

Installing the Link CX 47

Figure 4-6 Link CX Test Web Page

48 Link CX User Manual, Version A

4-3 Mounting the Link CX

The Link CX radio is a sealed unit that installs on a pole. When the Link CX is equipped with an integral

antenna, there is no need to install an external antenna. When the Link CX is equipped with an external

antenna, you will mount the Link CX as described in this section, then you will install the optional

external antenna as described in Section 4-4.

After completing the configuration steps in Section 4-2, continue with the following steps to mount the

Link CX on a pole.

4-3.1 Installing the Link CX Mounting Bracket

25 Install the pole-mount bracket as described in the appropriate section below.

A pole is not supplied with the Link CX and should be in place before

attempting installation.

The body performing the installation is the responsible for preventing

any contact or induction with mains lines at any voltage.

To comply with FCC RF exposure requirements, antennas used with

Link CXs must be rigidly mounted on permanent outdoor structures to

provide 2 m (79 in.) or more separation from all persons during Link CX

operation. Installers should refer to Table 3-2 when installing

factory-supplied antennas, or the contact the customer-supplied

antenna manufacturer for applicable gain and type restrictions to

ensure compliance.

When the Link CX is to be installed with an external antenna, make sure

that the Link CX and the antenna are mounted close enough to use the

factory-supplied 2 m (6.5 ft.) RF cable to connect them. Also make sure

that the Link CX and external antenna are not so close that they

interfere with each other during antenna alignment.

Installing the Link CX 49

Non-Adjustable Elevation Single Link CX Bracket

A See Figure 4-7. Assemble the two steel band clamps to the pole mount bracket.

B Wrap the clamps around the pole and finger tighten their clamp screws. The bracket

should be able to pivot around the pole, allowing horizontal alignment.

C Install the pole-mount bracket.

•When you are installing a Link CX with an integral antenna, use a compass or

optical aid to coarsely align the pole mount bracket with the far-end antenna

location. Continue with Section 4-3.2.

•When you are installing a Link CX with an external antenna, position the bracket

near enough to the planned antenna location so that the Link CX does not inter-

fere with antenna alignment and so the factory-supplied 2 m (6.5 ft.) antenna

cable can be connected to both units. Continue with Section 4-3.2.

Adjustable Elevation Single Link CX Bracket

A See Figure 4-8. Assemble the two steel band clamps to the pole mount bracket.

B Wrap the clamps around the pole and finger tighten their clamp screws. The bracket

should be able to pivot around the pole, allowing horizontal alignment.

C Install the pole-mount bracket. Use a compass or optical aid to coarsely align the pole

mount bracket with the far-end antenna location.

D Assemble the rest of the bracket parts as shown in Figure 4-8. Use a level to ensure

that the coarse elevation is 0°. Continue with Section 4-3.2.

Figure 4-7 Non-Adjustable Elevation Single Link CX Bracket

IW099201

Pole Mount

Bracket

Steel Band

Clamps

50 Link CX User Manual, Version A

Adjustable Elevation Dual Link CX Bracket

A Assemble the pole mount brackets and associated nuts, bolts, and washers on the

pole as shown in Figure 4-9. Finger tighten the four nuts. The pole mount bracket

assembly should be able to pivot around the pole, allowing coarse horizontal

alignment.

B Use a compass or optical aid to coarsely align the pole mount bracket assembly

between the far-end antenna locations.

C Tighten the four pole mount bracket assembly bolts to 20-25 foot-pounds

(27-34 n.m).

Figure 4-8 Adjustable Elevation Single Link CX Bracket

The pole mount bracket assembly does not have to be closely aligned

with either of the far-end antennas, as the Link CX mounting bracket

assemblies allow a wide range of elevation and azimuth alignment.

IW099202

Installing the Link CX 51

Figure 4-9 Adjustable Elevation Dual Link CX Pole Mount Bracket Assembly

IW099203

52 Link CX User Manual, Version A

D On each side of the pole mount bracket assembly, assemble the rest of the Link CX

mounting bracket assembly parts as shown in Figure 4-10.

E Finger tighten the six bolts on each Link CX mounting bracket assembly. Each Link CX

mounting bracket assembly should be able to pivot around the pole and elevate up and

down, allowing fine azimuth and elevation alignment.

F Use a level to ensure that the coarse elevation for each Link CX mounting bracket

assembly is 0°.

G Continue with Section 4-3.2.

Figure 4-10 Adjustable Elevation Dual Link CX Mounting Bracket Assembly (one

side only)

IW099204

Installing the Link CX 53

4-3.2 Attaching the Link CX to the Mounting Bracket

Selecting the Link CX Integral Antenna Polarization

When the Link CX is equipped with an integral antenna, how it is mounted determines the horizontal or

vertical polarization. The Link CX mounting brackets are designed to preserve the selected polarization

until the Link CX is removed from its bracket.

•When the Link CX is equipped with an external antenna, skip this section and continue with

Step 24.

•See Figure 4-11. The Link CX case is embossed with an arrow indicating the integral antenna

polarization. Point the arrow up for vertical, and sideways for horizontal polarization.

Both ends of the radio link must be identically polarized. The planned

polarization is available from the filled-out copy of the Radio Link

Planning Worksheet from Chapter Three.

Figure 4-11 Setting the Link CX Polarization -- Vertical Polarization Shown

IW094201

Rotate 90° for

Horizontal

Polarization

Arrow

54 Link CX User Manual, Version A

Attaching the Link CX

26 See Figure 4-11, Figure 4-12 and Figure 4-13.

27 Orient the Link CX as shown in Figure 4-11, and align it with the mounting bracket as shown

in Figure 4-12. Note that the four mounting studs on the Link CX should line up with the four

slide clips on the bracket as shown in Figure 4-13.

When the Link CX is equipped with an integral antenna, make sure that

the antenna is properly polarized as described in the previous section.

Figure 4-12 Attaching a 5.8 GHz Link CX to a Typical Mounting Bracket

IW099205

Installing the Link CX 55

28 Secure the Link CX to the bracket using the four (4) slide clips on the bracket as shown in

Figure 4-13.

The Link CX is now connected to the mounting pole and coarsely aligned, if equipped with an integral

antenna. Continue with Section 4-4.

Figure 4-13 Locking the Slide Clips

IW099206

Press in until

snapped onto

stud (x4)

56 Link CX User Manual, Version A

4-4 External Antenna Installation (Optional)

This section is only used when you are installing a Link CX with an external antenna. If you are installing

a Link CX with an integral antenna, skip this section and continue with Section 4-5.

Factory-Supplied Antennas

The factory-supplied antenna consists of a 61 cm (24 in.) or 122 cm (48 in.) solid parabolic reflector

assembly, radome, band clamp, and Pole Mount. The Pole Mount is designed to attach the antenna to a

vertical tower pipe of diameter 44 to 115 mm (1.75 to 4.5 in.). It also provides adjustment ranges of

±30°(fine) Elevation and ±20°(fine) Azimuth.

For the factory-supplied antenna specifications, refer to Appendix 2.

The Link CX is usually attached to the same pole as the external antenna, as mounting the Link CX close

to the antenna preserves the low (0.5 dBm) attenuation of the factory-supplied antenna cable. Continue

with Section 4-4.1 to install the factory-supplied antenna mounting bracket and the external antenna.

Customer-Supplied Antennas

4-4.1 Installing a Factory-Supplied 4 Foot (122 cm) Antenna Mounting Bracket

Site Planning

29 For antenna mounting and planning dimensions, see Figure 4-14 and Table 4-3.

30 The antenna is normally assembled with an elevation adjustment range of +50 degrees to

-5 degrees. By inverting the mount, it can be assembled with a +5 degree to -50 degree

range. In either configuration, the antenna centerline can be offset right or left, relative to the

vertical mast pipe (see Figure 4-15) by inverting the Horizontal Tube Assembly.

Installation, maintenance and removal of antenna systems requires

qualified, experienced personnel. interWAVE installation instructions

have been written for such personnel. interWAVE disclaims any liability

or responsibility for the results of improper or unsafe installation

practices.

The Link CX may be shipped without an integral or external antenna.

For instance, the customer may wish to use a larger external antenna

for increased gain. If this is the case, mount the Link CX as detailed in

Section 4-3, and mount the customer-supplied antenna as described in

the manufacturer’s instructions.

To comply with FCC RF exposure requirements, antennas used with

Link CXs must be rigidly mounted on permanent outdoor structures to

provide 2 m (79 in.) or more separation from all persons during Link CX

operation. Installers should contact the antenna manufacturer for

applicable gain and type restrictions to ensure compliance.

Installing the Link CX 57

Figure 4-14 Four Foot (122 cm) Antenna

Table 4-3 Four Foot Diameter Antenna Dimensions

58 Link CX User Manual, Version A

Unpacking and Preparation

31 Carefully unpack the reflector, mount, shroud (if any), radome (if any) and feed from the

crate. For correct antenna performance, handle all components with care. Set aside the

packaged feed and any shroud or radome. See Figure 4-16 through Figure 4-19.

Caution: The reflector spinning has been formed to a very close-toleranced parabolic

shape. Careful handling and assembly is required to avoid denting or deforming the

reflector, which would degrade the antenna’s performance.

32 Inspect for any damaged parts. See Table 4-4 through Table 4-7 for an inventory of the parts

and hardware shipped with the antenna.

Shroud Attachment

Attach the shroud assembly that is provided with high-performance antennas to the reflector. The

installation procedure is covered by another instruction sheet supplied with the shroud.

Note: Some models have the shroud factory installed.

Figure 4-15 Mount Configuration

Table 4-4 Contents List, Reflector Assembly

Installing the Link CX 59

Table 4-5 Contents List, Feed Assembly

Figure 4-16 Mounting Hardware Packed

Figure 4-17 Mounting Hardware Unpacked

60 Link CX User Manual, Version A

Table 4-6 Contents List, Mount Assembly

Installing the Link CX 61

Table 4-7 Contents List, Mount Assembly

Figure 4-18 Parabolic Reflector

62 Link CX User Manual, Version A

Mount Assembly and Attachment

33 The reflector should be placed face down, either on the shroud or blocked up on packing

lumber. Locate the Top and Bottom markings stenciled onto the back of the reflector.

34 Loosely attach Top Support Angles to the Horizontal Tube Assembly as shown in

Figure 4-20 and Figure 4-21.

35 For desired mount configuration (see Figure 4-15), attach the Vertical Tube Assembly to the

Horizontal Tube Assembly as shown in Figure 4-20 and Figure 4-21.

36 Verify proper assembly of the elevation rod hardware as shown in Figure 4-22. Remove

outer hardware and insert rod through elevation plate.

Important: For elevation angles grater than ±20°, the Beveled Washers shown in

Figure 4-22 must be used. However, beveled washers may be used for elevation angles

greater than ±10°.

37 Carefully place mount assembly onto antenna backring, taking care not to damage the

reflector. Loosely fasten the Top Support Angles and the Elevation Support Angle to the

antenna backring using 1/2” hardware as shown in Figure 4-20.

38 Verify alignment of the Vertical Assembly with the vertical axis of the reflector and secure the

Top Support Angles and the Elevation Support Angle to the ring.

Figure 4-19 Unpacking the Radome

Installing the Link CX 63

Figure 4-20 Antenna Mount Assembly

Figure 4-21 Antenna Mount Assembly

64 Link CX User Manual, Version A

Feed Installation

Following the instructions provided with the feed assembly, install the feed in the reflector. See

Figure 4-23 through Figure 4-27.

Figure 4-22 Elevation Rod Assembly

Figure 4-23 Feed Horn Installation

Installing the Link CX 65

Figure 4-24 Feed Horn Polarization Markings

Figure 4-25 Parabola Rear View Showing Polarization Reference Markers

Figure 4-26 Feed Horn Installation

66 Link CX User Manual, Version A

Radome Installation

Molded radomes (normally optional on standard antennas) should be installed following the instructions

provided.

Azimuth Adjustment Clamp/Shear Stop Installation

39 Verify proper assembly of the azimuth clamp/shear stop clamp as shown in Figure 4-28 and

Figure 4-29. Securely attach the shear stop clamp to the mast pipe as shown, orienting it as

nearly as possible to the antenna boresight direction, and square to the mast axis. Note that

the shear stop clamp used on the two foot antennas also provides the azimuth adjustment.

40 Refer to Figure 4-14 for the position of the antenna centerline relative to the shear stop

clamp. The clamp must be mounted to provide support during installation and azimuth

adjustment.

Figure 4-27 Feed Horn Installation for Vertical Polarized Operation

Figure 4-28 Azimuth Clamp/Shear Stop Assembly

Installing the Link CX 67

Antenna Hoisting and Installation

41 Attach a hoist strap around the vertical assembly or the horizontal assembly as shown in

Figure 4-30. Do not hoist by the elevation rod. Make sure that the vertical assembly is unob-

structed where it will mount against the mast pipe.

42 Attach tag lines and carefully lift the antenna into position, resting the vertical assembly on

the shear stop clamp.

43 Fasten the mount to the mast pipe with 1/2” U-bolts. The antenna must be free to rotate

during azimuth adjustment, so tighten only enough to close the gap between the mast and

vertical channel. Do not leave the antenna loose for any extended period of time, not even

overnight.

Figure 4-29 Azimuth Adjustment Clamp Assembly

68 Link CX User Manual, Version A

44 Radome Panel Rotation -- Ensure that the radome drain and lock nut are oriented downward

for proper drainage (refer to Figure 4-31). When finished, fasten the locking nut(s).

Figure 4-30 Hoisting the Antenna

Figure 4-31 Setting Radome Panel Rotation

Installing the Link CX 69

Inspection and Maintenance

45 Before leaving the installation, check that all hardware on the mount, shroud, radome, and

feed is tight and that nuts are locked in place.

46 Inspect the antenna at least once a year to check its condition and to insure safe operation

and maintenance. Qualified personnel, knowledgeable and experienced in antenna installa-

tions, are required for this inspection.

Supplemental Information

Table 4-8 is provided for installers unfamiliar with adequate nut tightening procedures for use on

stainless steel bolts, U-bolts, galvanized bolts or any bolts without the ASTM-A325 marking on the head.

Disregard these recommendations when specific tightening requirements are given.

Note: It is not recommended to reuse a palnut that has already been fully tightened or deformed

in any way. It should be replaced with a new palnut.

Weatherproofing the Type N Female Connector on Feeds

Remove the protective cover from the end of the feed and mate the connectors, screwing the male

connector firmly onto the feed.

Important: After connecting the coaxial cable, wrap the Type N connector with the gray butyl

rubber, squeezing it firmly around all joints to make a continuous seal. Finish the weatherproofing

by wrapping the butyl rubber with several layers of black PVC tape (not supplied).

Continue with Section 4-5 to complete the Link CX installation.

Table 4-8 Nut Tightening Specifications

70 Link CX User Manual, Version A

4-5 Completing the Link CX Installation

The Link CX and associated antenna are now mounted on the pole, and coarse-aligned with the far-end

antenna. Continue with the following steps to complete the Link CX installation.

4-5.1 Mounting the Lightning Arrestor

interWAVE strongly recommends that you use a lightning arrestor, such as the Transtector Lightning

Arrestor Kit, at the cable entry to the power, DS-3 and/or Ethernet equipment structure.

47 Install the lightning arrestor according to the manufacturer’s instructions, and according to

the guidelines in Appendix 4 to lessen the chance of damage from lightning strikes.

4-5.2 Routing the Data and Power Cables from the Lightning Arrestor

48 Route cables from the lightning arrestor through the cable entry to the power, DS-3 and/or

Ethernet equipment.

Leave a minimum of 38 cm (15 inches) of service loop in the cables where they attach to the

lightning arrestor. Avoid tight bends during cable routing and fastening.

49 Connect the power, DS-3 and/or Ethernet cables to the power, DS-3 and/or Ethernet equip-

ment and the lightning arrestor.

50 Route power, DS-3 and/or Ethernet cables from the lightning arrestor to the Link CX.

Using cable ties and/or standoffs, fasten these cables to the structure at 3 m (10 ft.)

intervals. Leave a minimum of 38 cm (15 inches) of service loop in the cables where they

attach to the Link CX and the lightning arrestor. Avoid tight bends during cable routing and

fastening.

51 Connect the power, DS-3 and/or Ethernet cables to the lightning arrestor.

52 Connect the power, DS-3 and/or Ethernet cables to the Link CX. See Figure 4-1 and

Table 4-1 for the locations and descriptions of the Link CX connectors.

53 Check the LEDs for proper operation. See Figure 4-1 and Table 4-1 for the locations and

descriptions of the Link CX LEDs.

•When power is properly applied to the Link CX, the PWR/LCL ALARM LED will be on.

The Link CX has two ethernet ports, and includes and internal ethernet

switch. However, typical ethernet hubs and switches do not have

spanning tree capability. MAKE SURE that you make only ONE ethernet

connection from a hub or switch to the Link CX to prevent broadcast

storms.

When you apply power to the Link CX, it starts transmitting. Do not

stand within 2 m (79 in.) of the front of the antenna during Link CX

operation to avoid harmful RF radiation.

Installing the Link CX 71

•Because the radio link has not yet been established, the RF LINK LED should be off.

•When the DS-3 equipment is or is not transmitting data to the Link CX, the DATA LED

should be on or off, respectively.

•When the Ethernet equipment is transmitting data to the Link CX, the ENET 1 and/or

ENET 2 LEDs should be on or flashing. When the Ethernet equipment is not transmit-

ting data to the Link CX, the ENET 1 and/or ENET 2 LEDs should be off or flashing as

local data is received.

If any of these conditions is not true, troubleshoot the associated equipment and cables.

4-5.3 Grounding the Link CX and Antenna

The Link CX and the optional external antenna have grounding lugs. Make sure they are connected to a

good earth ground using the guidelines in Appendix 4.

54 Following the guidelines in Appendix 4, connect a customer-supplied solid wire or tape (not

braided) grounding wire to the grounding lug on the back of the Link CX. See Figure 4-32 for

the grounding lug location.

Connect the other end of this cable to a proper grounding point.

72 Link CX User Manual, Version A

55 If the Link CX is equipped with an external antenna, follow the guidelines in Appendix 4 and

connect a customer-supplied solid wire or tape (not braided) grounding wire to the

grounding lug on the back of the antenna.

Connect the other end of this wire to a proper grounding point.

4-5.4 Sealing the Data and Power Cable Connectors

The cables that are terminated outdoors must be sealed at each exposed end to prevent moisture

incursion and damage. For all exposed connectors, including those between an external antenna and

the Link CX, perform the following:

56 Wrap each connector with vinyl or plastic electrical tape.

57 Wrap the vinyl or plastic electrical tape with butyl rubber amalgamating tape to prevent

moisture from permeating the connector.

58 Wrap the butyl rubber amalgamating tape with vinyl or plastic electrical tape.

Figure 4-32 Connecting an Earth Ground to the Link CX

IW094202

To Earth Ground

Grounding

Lug

Customer-Supplied

Grounding Wire or Tape

Installing the Link CX 73

Continue with Section 4-6 to fine tune the antenna’s azimuth and elevation.

4-6 Aligning the Antenna

This section includes steps used to fine tune the antenna alignment using RSSI as measured using a

voltmeter. This part of the installation procedure is most easily accomplished with installers at each end

of the radio link who are in communication with one another.

When you are aligning a Link CX with an integral antenna on a single adjustable elevation pole mount,

continue with Section 4-6.1. When you are aligning a Link CX with an integral antenna on a dual

adjustable elevation pole mount, continue with Section 4-6.2. When you are aligning a Link CX with an

external antenna, continue with Section 4-6.3.

4-6.1 Integral Antenna on a Single Adjustable Elevation Mount

Perform Step 57 through Step 62 on the local radio. Then, repeat these steps for the remote radio. See

Figure 4-8 for the Single Pole Mount illustration.

59 Remove the cap from the BNC connector of the remote antenna. Attach the hand-held volt-

meter and BNC test lead to the test point.

60 Fine Azimuth Alignment -- Rotate the Link CX mounting bracket on the pole until the proper

azimuth alignment is achieved. Torque the steel band clamps on the single Link CX

non-adjustable elevation pole mount to RR foot-pounds (SS n.m). Peak the alignment for

maximum voltage at the remote antenna. Expected voltage is more than +1 VDC. The adjust-

ment should be slowly tuned through the peak, and reset at the absolute maximum before

tightening the straps.

61 Fine Elevation Alignment -- Rotate the Link CX mounting bracket until the proper elevation

alignment is achieved. Torque the two elevation locking bolts to 20 to 25 foot-pounds (27 to

Failure to follow this antenna alignment procedure may damage your

equipment and may render the radio unusable. Read through the entire

procedure before attempting adjustment. Contact interWAVE with any

questions.

When you apply power to the Link CX, it starts transmitting. Do not

stand within 2 m (79 in.) of the front of the antenna during Link CX

operation to avoid harmful RF radiation.

The Link CX with integral antenna is normally mounted on one of the

adjustable elevation pole mounts to allow most accurate alignment and

best system gain. If you are attempting to align a Link CX with integral

antenna on a non-adjustable pole mount, adapt the following

procedure, or contact interWAVE for fully-adjustable mounts.

74 Link CX User Manual, Version A

34 n.m). Peak the alignment for maximum voltage at the remote antenna. Expected voltage

is more than +1 VDC. The adjustment should be slowly tuned through the peak, and reset at

the absolute maximum before tightening the bolts.

62 Disconnect the hand-held voltmeter and BNC test lead from the RSSI port.

63 Finger-tighten the RSSI port cap to seal the Link CX case.

64 Recheck the Link CX LEDs. See Figure 4-1 and Table 4-1 for the locations and descriptions

of the Link CX LEDs.

•When power is properly applied to the Link CX, the PWR/LCL ALARM LED will be on.

•Because the radio link has been established, the RF LINK LED should be on.

•When the DS-3 equipment is or is not transmitting data to the Link CX, the DATA LED

should be on or off, respectively.

•When the Ethernet equipment is transmitting data to the Link CX, the ENET 1 and/or

ENET 2 LEDs should be on or flashing. When the Ethernet equipment is not transmit-

ting data to the Link CX, the ENET 1 and/or ENET 2 LEDs should be off.

If any of these conditions is not true, troubleshoot the associated equipment and cables.

The Link CX is now mounted and aligned. Continue with Section 4-7 for acceptance tests.

4-6.2 Integral Antenna on a Dual Adjustable Elevation Mount

Perform Step 63 through Step 68 on the local radio. Then, repeat these steps for the remote radio. See

Figure 4-10 for the Dual Pole Mount illustration.

65 Remove the Link CX cap from the BNC connector of the remote radio. Attach the hand-held

voltmeter and BNC test lead to the test point.

66 Fine Azimuth Alignment -- Rotate the Link CX on its mounting bracket until the proper

azimuth alignment is achieved. Torque the four small azimuth locking bolts to 4 to

6 foot-pounds (5.5 to 8 n.m). Peak the alignment for maximum voltage at the remote

antenna. Expected voltage is more than +1 VDC. The adjustment should be slowly tuned

through the peak, and reset at the absolute maximum before tightening the bolts.

67 Fine Elevation Alignment -- Rotate the Link CX mounting bracket until the proper elevation

alignment is achieved. Torque the two large elevation locking bolts to 20 to 25 foot-pounds

(27 to 34 n.m). Peak the alignment for maximum voltage at the remote antenna. Expected

voltage is more than +1 VDC. The adjustment should be slowly tuned through the peak, and

reset at the absolute maximum before tightening the bolts.

Alignment for each antenna should be alternated at least twice before

confirming the final setting.

Alignment for each antenna should be alternated at least twice before

confirming the final setting.

Installing the Link CX 75

68 Disconnect the hand-held voltmeter and BNC test lead from the RSSI port.

69 Finger-tighten the RSSI port cap to seal the Link CX case.

70 Recheck the Link CX LEDs. See Figure 4-1 and Table 4-1 for the locations and descriptions

of the Link CX LEDs.

•When power is properly applied to the Link CX, the PWR/LCL ALARM LED will be on.

•Because the radio link has been established, the RF LINK LED should be on.

•When the DS-3 equipment is or is not transmitting data to the Link CX, the DATA LED

should be on or off, respectively.

•When the Ethernet equipment is transmitting data to the Link CX, the ENET 1 or

ENET 2 LEDs should be on or flashing. When the Ethernet equipment is not transmit-

ting data to the Link CX, the ENET 1 and/or ENET 2 LEDs should be off.

If any of these conditions is not true, troubleshoot the associated equipment and cables.

The Link CX is now mounted and aligned. Continue with Section 4-7 for acceptance tests.

4-6.3 External Antenna on Antenna-Specific Mount

Perform Step 69 through Step 79 on the local radio. Then, repeat these steps for the remote radio. See

Figure 4-14 for the antenna assembly and Pole Mount illustration.

Normally the antenna is aligned by performing azimuth and elevation adjustments and elevation

adjustments as necessary until the peak signal is obtained. It may be helpful to re-peak one adjustment

before finalizing or locking down the other.

Warning: Damage to the antenna can occur if azimuth or elevation adjustments are attempted

without loosening the proper connections as described in the following steps.

71 Remove the BNC cap from the RSSI connector of the remote radio. Attach the hand-held

voltmeter and BNC test lead to the test point.

72 Be sure the mast pipe U-bolts are just loose enough to allow mount rotation while main-

taining complete contact between the mount and the mast pipe.

73 Turn the long stainless steel azimuth screws against the mounting channel. By alternately

turning one azimuth adjustment screw out and the other in, the antenna can be rotated to

the desired azimuth angle. Approximately one turn changes the azimuth direction by 1°.

Avoid adjusting the antenna beyond the ±5° provided by the azimuth clamp as this can

damage the adjusting hardware. Fasten the antenna to the mast pipe and reposition the

clamp if needed.

Note: By securing the mount to the mast pipe and realigning the azimuth clamp with

the antenna boresight, more reliable and precise azimuth adjustments can be

achieved.

After all adjustments are made, tighten both of the azimuth screws against the channel and

secure with the lock nuts provided.

74 Tighten the mast pipe U-bolts while maintaining the peak signal by alternating from left to

right in 1/4 turn intervals.

76 Link CX User Manual, Version A

75 Insure that both of the bolts connecting the mount to the Top Support Angles and the

pivoting Elevation Angle (refer to Figure 4-20 and Figure 4-22) are just loose enough to

allow resisted rotation.

76 Back the outer nuts on the elevation rod away from the bottom mount plate to allow some

fine adjustment range.

77 Turn the inside nut (with flat washer) on the elevation rod to adjust the elevation angle.

Approximately five turns changes the elevation by 1°. Remember, for elevation greater than

20°, install the two beveled washers as shown in Figure 4-22.

78 After all adjustments are made, lock the nut against the bottom mount plate. Tighten the

angle pivot bolt and support bracket bolts to the specifications listed in Table 4-8.

Important: Be sure to tighten all hardware after final adjustments and insure that split

lockwashers, palnuts, or jam nuts are used where provided.

79 Disconnect the hand-held voltmeter and BNC test lead from the RSSI port.

80 Finger-tighten the RSSI port cap to seal the Link CX case.

81 Recheck the Link CX LEDs. See Figure 4-1 and Table 4-1 for the locations and descriptions

of the Link CX LEDs.

•When power is properly applied to the Link CX, the PWR/LCL ALARM LED will be on.

•Because the radio link has been established, the RF LINK LED should be on.

•When the DS-3 equipment is or is not transmitting data to the Link CX, the DATA LED

should be on or off, respectively.

•When the Ethernet equipment is transmitting data to the Link CX, the ENET 1 or

ENET 2 LEDs should be on or flashing. When the Ethernet equipment is not transmit-

ting data to the Link CX, the ENET 1 and/or ENET 2 LEDs should be off.

If any of these conditions is not true, troubleshoot the associated equipment and cables.

Alignment for each antenna should be alternated at least twice before

confirming the final setting.

Installing the Link CX 77

4-7 Acceptance Testing

This section describes the tests used to verify that the Link CX data input circuitry, near-end Link CX

radio, radio link, and far-end Link CX radio are installed properly and operating correctly.

82 Verify that the physical installation is correct. Use Table 4-9 to sign off the individual checks.

Table 4-9 Physical Installation Checklist

Checklist Item Verified Inspector Date

Is the mounting pipe securely connected to the

mounting structure?

Is the Link CX securely connected to the

mounting pipe?

If equipped, is the external antenna securely

connected to the mounting pipe?

Is the lightning protection above the Link CX and

antenna properly grounded?

Is the Link CX properly grounded?

If equipped, is the external antenna properly

grounded?

Is the lightning arrestor at the entry to the

equipment enclosure properly grounded?

Is all cabling to the Link CX properly routed (no

sharp bends and properly attached)?

Are all exposed connectors properly sealed

against moisture?

Are all unused connectors capped off or

otherwise sealed against moisture?

Is the internal or external antenna polarization

correct (as indicated on the back of the unit)?

78 Link CX User Manual, Version A

83 Verify that the electrical connections are correct. Use Table 4-10 to sign off the individual

checks.

The next series of acceptance tests requires you to log in to the built-in web server with a computer

equipped with a web browser.

84 Connect your computer to the Link CX through the Ethernet equipment connected to the

ETHERNET 1 or ETHERNET 2 port.

85 Log in to the Link CX built-in web server to display the Monitor page as described in

Section 4-2.2.

86 Make sure the Automatic Tx Power Control indicated in the lower half of the Monitor page is

set to Disabled.

87 Record the RSSI indicated at the top of the Monitor page. Save this number for later

troubleshooting.

Table 4-10 Electrical Connection Checklist

Checklist Item Verified Inspector Date

Is the proper voltage supplied to the Link CX

(PWR/LCL ALM LED on)?

Is the Link CX receiving signal from the radio link

(RF LINK LED on)?

When the Link CX is connected to DS-3

equipment, is the Link CX receiving the expected

signal (DATA LED on)?

When the Link CX is connected to Ethernet

equipment on port ETHERNET 1, is the Link CX

receiving the expected signal (ENET 1 LED on or

flashing)?

When the Link CX is connected to Ethernet

equipment on port ETHERNET 2, is the Link CX

receiving the expected signal (ENET 2 LED on or

flashing)?

Installing the Link CX 79

88 Go to the Test page and verify that the Link CX passes the tests in Table 4-11.

When all of the acceptance tests in this section have been completed and all Checklist items have been

verified, the Link CX radio link has been verified. The Inspector marks for all tested items constitute

acceptance of the Link CX equipment and the associated radio link.

Table 4-11 Internal Circuit and Radio Link Checklist

Checklist Item Verified Inspector Date

Does the Link CX input circuitry and DS-3/

Ethernet cabling work properly? (Set up Local +

Remote Loopback and verify that the DS-3/

Ethernet equipment is receiving the looped-back

signal it is transmitting to the Link CX.)

Does the Link CX radio circuitry work properly?

(Set up Radio Loopback and verify that the

DS-3/Ethernet equipment is receiving the

looped-back signal it is transmitting to the

Link CX.)

Do the near-end and far-end Link CX radio

circuits and radio paths work properly? (Set up

BER Test and verify that the near-end Link CX is

receiving the looped-back BER test signal it is

transmitting to the far-end Link CX.)

Does the end-to-end radio link work properly?

(Select No Test and verify that the DS-3/Ethernet

equipment at both ends of the radio link are

receiving the signal transmitted to it by the

remote DS-3/Ethernet equipment.)

80 Link CX User Manual, Version A

(this page intentionally left blank)

Final Link CX Setup 81

Five

Final Link CX Setup

50000

The user is required to finish configuring the Link CX after physical installation. The Link CX includes a

built-in HTML-based web server, which includes configuration, operating, monitoring and test pages.

This web server can be accessed locally using a Web browser on a Craft PC, or remotely using any Web

browser on the same Ethernet network as the Link CX. The initial configuration has already been done

using a Craft PC at the Link CX site, and all other operation and maintenance tasks can be performed

remotely or locally, as required.

This chapter deals only with final Link CX setup using a Craft PC, and provides step-by-step configura-

tion instructions.

Post Acceptance Test Configuration

This section includes instructions on how to finish the Link CX configuration after it is installed, as

described in Chapter Four. The Link CX should be in the following state:

•Powered on.

•Antenna aligned with far end antenna.

•Acceptance tested.

•No loopbacks or other tests active.

•Carrying, or capable of carrying, payload data.

•Transmit attenuation disabled.

•Transmitting at minimum required transmit power (Automatic Tx Power Control disabled,

unless required).

This section assumes that the Link CX has already been installed and

acceptance-tested as described in Chapter Four. If all the steps in

Chapter Four have not been completed, complete them before starting

this section.

82 Link CX User Manual, Version A

Final Link CX Configuration

Obtain a copy of the information entered in Table 3-3, Radio Link Planning Worksheet, and continue

with the following steps:

1Record the RSSI level from Step 85 in Chapter Four for future reference. The Step 85 value

is the RSSI level with Automatic Tx Power Control disabled.

2Connect your computer to the Link CX through the Ethernet equipment connected to the

ETHERNET 1 or ETHERNET 2 port.

3Log in to the Link CX built-in web server to display the Monitor page as described in

Section 4-2.2.

4Go to the Test page, and verify that No Test is selected.

5Go to the Commission Radio page, and verify that the entries on this page match the entries

in Table 3-3, Radio Link Planning Worksheet. Make sure the Tx Attenuation is set to No

attenuation, and that Automatic Tx Power Control is set to Enable.

6Go to the Commission Manager Interfaces page, and verify that the entries on this page

match the entries in Table 3-3, Radio Link Planning Worksheet.

You can upgrade the login security of the Link CX at this time. If you want to restrict access

to the Link CX, consider the following:

•If the Link CX does not have a Login Name and Password, you can assign one now.

•If the Link CX allows login from any IP address, you may want to restrict login to only

one or two IP addresses. MAKE SURE the Craft PC IP address is included if you select

this option.

•If the Link CX is set to broadcast SNMP traps to the Public community, you can restrict

broadcasts to a different community.

•If the Link CX is set to broadcast SNMP traps to multiple IP addresses, you can restrict

broadcasts to fewer IP addresses.

•If the Link CX is set to allow read-write access from the Public community, you can

restrict read-write access to a different community.

•If the Link CX is set to allow read-write access from any or multiple IP addresses, you

can restrict read-write access to fewer IP addresses.

•If the Link CX is set to allow read-only access from the Public community, you can

restrict read-only access to a different community.

•If the Link CX is set to allow read-only access from any IP address, you can restrict

read-only access to fewer IP addresses.

7When required, make any security upgrades as described in Step 6.

The Link CX is now fully configured, tested, and operational, and should continue to operate

unattended. Continue with Chapter Six for monitoring and trend analysis, and refer to Chapter Seven for

troubleshooting information.

Monitoring and Trend Analysis 83

Six

Monitoring and Trend Analysis

60000

Each Link CX and radio link can be monitored through either the built-in Web server or SNMP agent

interfaces.

6-1 Built-In Web Server Interface

A subset of the SNMP-accessible statistics is available through the Web server interface connected to a

web browser over an Ethernet link. These statistics can be read by logging in to display the Monitor

page, as shown in Appendix 3. Statistics can be repeatedly sampled using the Web browser reload or

refresh feature.

The easiest indicator to monitor is the RSSI. Keep a record of the RSSI levels measured in Step 87 in

Chapter Four. The Step 87 value is the RSSI level with Automatic Tx Power Control disabled (transmit-

ting at maximum power).

A properly designed radio link with a 20 dB or greater fade margin should indicate receive levels in the

area of -60 dBm at Link CX sites. The accuracy of the indicated RSSI is approximately ±5 dB over a

range of -90 dBm to -65 dBm.

6-2 SNMP Network and Element Management Systems

All monitored statistics are available through SNMP queries. In addition to MIB-II variables,

product-specific variables are available through the Link CX enterprise MIB, which can be retrieved via

FTP from F:/PUB/link_cx.mib (text file) in the Link CX file system. Most commercial SNMP NMSs and

EMSs have the ability to sample variables over time and display trends and raise alarms based on

defined thresholds. In addition, applicable SNMP traps are supported and can be used to raise alarms

on the NMS and/or EMS.

Any standard SNMP NMS or EMS can be used to monitor and control the Link CX network and

individual Link CX radios.

The Link CX has an enterprise MIB provided in standard ASCII format, which can be accessed for

printing. When a software upgrade is performed, the self-extracting file places all directories and

associated files necessary for the upgrade in a location specified by the operator at the time the

self-extracting file is executed. One of the directories created is /PUB, which contains the printable

enterprise ASCII text MIB file named link_cx.mib.

The enterprise MIB file is also stored in FLASH memory on the Link CX in F:/PUB. A copy of the

link_cx.mib file can be extracted from the Link CX using an ASCII FTP file transfer.

84 Link CX User Manual, Version A

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Troubleshooting the Link CX 85

Seven

Troubleshooting the Link CX

70000

This chapter explains how to troubleshoot a Link CX and associated radio link using the LEDs, a local or

remote Web browser, or any other method.

This chapter includes:

•Section 7-1, Troubleshooting Tables

•Section 7-2, Using the Link CX LEDs

•Section 7-3, Using RSSI

•Section 7-4, Using a Web Browser

7-1 Troubleshooting Tables

This section includes a troubleshooting table for different symptoms:

Table 7-1 Symptoms and Probable Causes

Symptoms Probable Cause

No response from Link CX, No payload data

being transmitted

Power loss to Link CX, New obstructions

(leafy trees and/or buildings, for example),

Antenna no longer in alignment, Damaged

cables, Defective transmission equipment

Reduced RSSI, High BER, Reduced payload

data transmission rate

New obstructions (leafy trees and/or

buildings, for example), Antenna no longer in

alignment, Damaged or degraded cables,

New interferers (multipath reflections from

flooded fields or new buildings, or new

consumer applications, for example)

Intermittent transmissions

ATPC unable to block a frequency hopping

transmitter or other intermittent interferer --

disable ATPC

86 Link CX User Manual, Version A

7-2 Using the Link CX LEDs

Link CX operation can be monitored using the LEDs. The LEDs show general radio link status at a

glance. See Figure 1-3 for LED locations on the Link CX radio. The LEDs operate in the following modes.

7-3 Using RSSI

When you connect a voltmeter with BNC adapter to the Link CX RSSI port, you can measure an

indication of the received RF signal level. When the Receive Level falls below -70 dBm, see Table 7-1 for

a list of possible causes.

7-4 Using a Web Browser

As described in Appendix 3, most of the Link CX configuring, operating, and maintenance are

performed using the Link CX Web pages. Use the error indications in the web server interface and

Table 7-1 to troubleshoot alarm indications.

Table 7-2 LEDs and Alarm Indication Modes

LED Normal State Alarm State

PWR/LCL ALM ON -- Power on and no alarm Flashing -- Local alarm

OFF -- Power off

RF LINK ON -- Receive RF OK OFF -- Receive radio link alarm

DATA ON -- DS-3 input OK OFF -- DS-3 input LOS

ENET 2 ON -- Ethernet input OK

Flashing -- Receiving Ethernet data OFF -- No Ethernet input

ENET 1 ON -- Ethernet input OK

Flashing -- Receiving Ethernet data OFF -- No Ethernet input

Make sure you replace the Link CX RSSI connector cover when done

troubleshooting the radio link.

Interface Cable Pinouts 87

Appendix 1

Interface Cable Pinouts

10000

A1-1 DS-3 Cable

A1-2 Ethernet Data Cable

Table A1-1 DS-3 Cable (100587-00X)

Link CX IN/OUT TNC Connectors Wire Color DS-3 Equipment BNC Port

Pin Function Function Pin

1 DATA IN -- TX 1

Shield GND Foil GND Shield

2 DATA OUT -- RX 2

Shield GND Foil GND Shield

Table A1-2 10/100 Ethernet Data Cable (100652-00X)

Link CX ETHERNET 1/2 Connectors Wire Color Ethernet Equipment RJ-45 Port

Pin Function Function Pin

1 RX+ White/Orange TX+ 1

2 RX- Orange TX- 2

3 TX+ White/Green RX+ 3

4 TX- Green RX- 6

IW099208

IW099209

88 Link CX User Manual, Version A

A1-3 DC Power Cable

A1-4 Ethernet Crossover Cable

Table A1-3 DC Power Cable (100653-00X)

To Link CX POWER (4-pin

Circular) Wire Color To DC Power Supply

Pin Function Function Wire

1 -V in White -V out White

2----RS-232 TX--

3----RS-232 RX--

4 +V in Red RS-232 GND Red

Table A1-4 10/100 Ethernet Crossover Cable (100655-001)

Link CX ETHERNET 1/2

Connectors Wire Color

Link CX ETHERNET 1/2

Connectors

Pin Function Function Pin

1 RX+ White/Orange TX+ 3

2 RX- Orange TX- 4

3 TX+ White/Green RX+ 1

4 TX- Green RX- 2

IW099210

IW099212

Interface Cable Pinouts 89

A1-5 External Antenna Cable

A1-6 RS-232 Craft Cable

Table A1-5 Antenna Cable (AC100008)

Link CX N-Type Connector Wire Color Antenna N-Type Connector

Pin Function Function Pin

1TX/RX -- TX/RX 1

Shield GND -- GND Shield

Table A1-6 RS-232 CLI Craft PC Cable (100586-001)

To Link CX TEST (4-pin Circular) Wire Color To Craft PC Serial DB-9 Port

Pin Function Function Pin

1N/C -- N/C --

2 RS-232 RX Red RS-232 TX 3

3 RS-232 TX Black RS-232 RX 2

4 RS-232 GND Yellow RS-232 GND 5

IW099213

IW099207

90 Link CX User Manual, Version A

A1-7 StreamNet ATM Switch Cable

Table A1-7 StreamNet DS-3 Cable (100588-003)

Link CX IN/OUT TNC Connectors Wire Color StreamNet DS-3 TNC Port

Pin Function Function Pin

1 DATA IN -- TX 1

Shield GND Foil GND Shield

2 DATA OUT -- RX 2

Shield GND Foil GND Shield

IW099211

Technical Specifications 91

Appendix 2

Technical Specifications

20000

A2-1 Link CX Radio

Table A2-1 Link CX-DSX DS-3 or Ethernet Version (5.3 GHz)

General

Frequency Range 5.25-5.35 GHz

Compliance (USA) FCC Rules Part 15.407, U-NII

Capacity Full-duplex DS-3, per Bellcore GR-499-CORE, or

45 Mbps Ethernet, per IEEE 802.3

Emission Bandwidth (at 26 dB) 13.9 MHz

Channel Center Frequencies

•Channel 1 (Tx Low/Rx High)

•Channel 1 (Tx High/Rx Low)

•Channel 2 (Tx Low/Rx High)

•Channel 2 (Tx High/Rx Low)

Transmit--5.262 GHz/Receive--5.322 GHz

Transmit--5.322 GHz/Receive--5.262 GHz

Transmit--5.278 GHz/Receive--5.338 GHz

Transmit--5.338 GHz/Receive--5.278 GHz

Modulation Type 16 QAM

Transmitter

Maximum RMS Power Output -1.0 dBm

Power Output Stability +/- 2 dB

Frequency Stability +/- 5 ppm

Transmit Duty Cycle 100%

Emissions Mask & Spurious and

Harmonic Output Per FCC CFR 47 Part 15.407

Channel Frequency Selection Software-controlled

Automatic Tx Power Control (ATPC) Maintains a constant Carrier-to-Noise Ratio at both

ends of a link, operator enabled ON or OFF

Transmitter Attenuation Range 0-30.0 dB in 1 dB steps, and Mute 40 dB, operator

controlled

92 Link CX User Manual, Version A

Receiver

Type Double Heterodyne

Error Correction FEC Reed Solomon Decoding

Sensitivity at 10-6 BER -78 dBm state guaranteed

Typical Unfaded BER 10-10

Frequency Stability +/- 5 ppm

Channel Frequency Selection Software-controlled

Maximum Receive Level without

Receiver Degradation -35 dBm

Maximum Receive Level without

Receiver Damage -30 dBm

DS-3 Interface

Type Full-duplex DS-3, per Bellcore GR-499-CORE

Line Rate 44.736 Mbps

Line Code B3ZS

Tx and Rx Electrical Interfaces 75 Ohm unbalanced

Tx and Rx Physical Connectors Female TNC coaxial with grounded outer conductor

Ethernet Interfaces

Number Two, with independent transmit and receive pair

sensing

Type Full-duplex 10/100 Base-T per IEEE 802.3

Line Rate 45 Mbps

Max Distance between CPE and Link CX 100 m (328 ft.)

Electrical Interfaces 100 Ohm UTP

Physical Connectors Female four-pin Circular

External Antenna to Link CX Antenna Port (Optional)

Connector Type 50 Ohm Coaxial N-Type Female

Antenna Port Return Loss >=12 dB

Other Interfaces

Craft Port Male four-pin Circular, RS-232 asynchronous data

port (TXD, RXD, GND)

Table A2-1 Link CX-DSX DS-3 or Ethernet Version (5.3 GHz) (continued)

Technical Specifications 93

RSSI Female BNC, DC voltage level proportionate to

Received Signal Strength

Power Requirements

DC Source +/-21 to +/-60VDC

Power Consumption 30 watts nominal

Undervoltage Protection Circuit > +/- 18 VDC to power up the Link CX

Physical Connector Male four-pin Circular

Environmental

Ambient Temperature Range

•Operational

•Storage

-33 to +60°C (-27 to +140°F)

-40 to +85°C (-40 to +185°F)

Relative Humidity

•Operational

•Storage

100%, all weather protection

95%, noncondensing

Altitude

•Operational

•Storage

15,000 ft. AMSL (4,500m)

50,000 ft. AMSL (15,000m)

Mechanical

Height (HxWxD)

•With External Antenna

•With Integral Connector

30 x 30 x 10 cm (12 x 12 x 4 in.)

30 x 30 x 10.6 cm (12 x 12 x 4.25 in.)

Weight

•With Integral Antenna

•With External Antenna Connector

(TBD) kg ( lb.); Shipping Weight: kg ( lb.)

Table A2-1 Link CX-DSX DS-3 or Ethernet Version (5.3 GHz) (continued)

94 Link CX User Manual, Version A

Table A2-2 Link CX-DSX DS-3 or Ethernet Version (5.8 GHz)

General

Frequency Range 5.725-5.825 GHz

Compliance Complies with FCC Ruling Part 15.247

Capacity Full-duplex DS-3, per Bellcore GR-499-CORE, or

45 Mbps Ethernet, per IEEE 802.3

Emission Bandwidth 16 MHz

Channel Center Frequencies

•Channel 1 (Tx Low/Rx High)

•Channel 1 (Tx High/Rx Low)

•Channel 2 (Tx Low/Rx High)

•Channel 2 (Tx High/Rx Low)

Transmit--5.737 GHz/Receive--5.797 GHz

Transmit--5.797 GHz/Receive--5.737 GHz

Transmit--5.753 GHz/Receive--5.813 GHz

Transmit--5.813 GHz/Receive--5.753 GHz

Modulation Type 16 QAM

Factory-Supplied Coaxial Cable 2 m (6.6 ft.) N-Type Male to N-Type Male

Transmitter

Maximum RMS Power Output +16.0 dBm

Power Output Stability +/- 2 dB

Frequency Stability +/- 5 ppm

Transmit Duty Cycle 100%

Emissions Mask & Spurious and

Harmonic Output Per FCC CFR 47 Part 15.407b3

Channel Frequency Selection Software-controlled

Automatic Tx Power Control (ATPC) Maintains a constant Carrier-to-Noise Ratio at both

ends of a link, operator enabled ON or OFF

Transmitter Attenuation Range 0-30.0 dB in 1 dB steps, and Mute 40 dB, operator

controlled

Receiver

Type Double Heterodyne

Error Correction FEC Reed Solomon Decoding

Sensitivity at 10-6 BER -78 dBm state guaranteed

Typical Unfaded BER 10-10

Frequency Stability +/- 5 ppm

Channel Frequency Selection Software-controlled

Technical Specifications 95

Maximum Receive Level without

Receiver Degradation -35 dBm

Maximum Receive Level without

Receiver Damage -30 dBm

DS-3 Interface

Type Full-duplex DS-3, per Bellcore GR-499-CORE

Line Rate 44.736 Mbps

Line Code B3ZS

Tx and Rx Electrical Interfaces 75 Ohm unbalanced

Tx and Rx Physical Connectors Female TNC coaxial with grounded outer conductor

Ethernet Interfaces

Number Two, with independent transmit and receive pair

sensing

Type Full-duplex 10/100 Base-T per IEEE 802.3

Line Rate 45 Mbps

Max Distance between CPE and Link CX 100 m (328 ft.)

Electrical Interfaces 100 Ohm UTP

Physical Connectors Female four-pin Circular

External Antenna to Link CX Antenna Port (Optional)

Connector Type 50 Ohm Coaxial N-Type Female

Antenna Port Return Loss >=12 dB

Other Interfaces

Craft Port Male four-pin Circular, RS-232 asynchronous data

port (TXD, RXD, GND)

RSSI Female BNC, DC voltage level proportionate to

Received Signal Strength

Power Requirements

DC Source +/-21 to +/-60VDC

Power Consumption 30 watts nominal

Undervoltage Protection Circuit > +/- 18 VDC to power up the Link CX

Physical Connector Male four-pin Circular

Table A2-2 Link CX-DSX DS-3 or Ethernet Version (5.8 GHz) (continued)

96 Link CX User Manual, Version A

Environmental

Ambient Temperature Range

•Operational

•Storage

-33 to +60°C (-27 to +140°F)

-40 to +85°C (-40 to +185°F)

Relative Humidity

•Operational

•Storage

100%, all weather protection

95%, noncondensing

Altitude

•Operational

•Storage

15,000 ft. AMSL (4,500m)

50,000 ft. AMSL (15,000m)

Mechanical

Height (HxWxD)

•With External Antenna

•With Integral Connector

30 x 30 x 10 cm (12 x 12 x 4 in.)

30 x 30 x 10.6 cm (12 x 12 x 4.25 in.)

Weight

•With Integral Antenna

•With External Antenna Connector

(TBD) kg ( lb.); Shipping Weight: kg ( lb.)

Table A2-2 Link CX-DSX DS-3 or Ethernet Version (5.8 GHz) (continued)

Technical Specifications 97

A2-2 Factory-Supplied Antennas

This chapter describes specifications for the integral Link CX antenna, and the three factory-supplied

antennas. Specifications for customer-supplied antennas are to be supplied by the antenna

manufacturer.

Table A2-3 5.3 GHz and 5.8 GHz Integral Flat Panel Antenna

Size 30 x 30 x 1.9 cm (12 x 12 x 0.75 in.)

Mounting Permanently attached to the Link CX radio;

Gasketed to prevent moisture intrusion

Polarization Horizontal or vertical, depending on Link CX

mounting position

Forward Gain 21 dBi

Front/Back Ratio 30 dB

Beam Width 12°

Elevation Adjustment ± 15°

Azimuth Adjustment 360°

Mounting Bracket Pole Capacity

•Single Link CX

•Dual Link CX

4.43 - 11.4 cm (1.75 - 4.5 in.)

98 Link CX User Manual, Version A

Table A2-4 61 cm (2 ft.) 5.8 GHz Parabolic Antenna (Note)

Size 61 cm (2 ft.) round parabolic with integral radome

Mounting Independent mounting

Polarization Horizontal or vertical, depending on mounting

position

Forward Gain 28.1 dBi

Front/Back Ratio 38 dB

Beam Width 6°

Elevation Adjustment ± 15°

Azimuth Adjustment 360°

Mounting Bracket Pole Capacity 4.43 - 11.4 cm (1.75 - 4.5 in.)

Connector to Link CX Coaxial 50 Ohm Female N-Type

Factory-Supplied Coaxial Cable to

Link CX 2 m (6.6 ft.) N-Type Male to N-Type Male

Note: This antenna is not FCC certified for use with the 5.3 GHz Link CX.

Table A2-5 122 cm (4 ft.) 5.8 GHz Parabolic Antenna (Note)

Size 122 cm (4 ft.) round parabolic with integral

radome

Mounting Independent mounting

Polarization Horizontal or vertical, depending on mounting

position

Forward Gain 34 dBi

Front/Back Ratio 46 dB

Beam Width (TBD) °

Elevation Adjustment ± 15°

Azimuth Adjustment 360°

Mounting Bracket Pole Capacity 4.43 - 11.4 cm (1.75 - 4.5 in.)

Connector to Link CX Coaxial 50 Ohm Female N-Type

Factory-Supplied Coaxial Cable to

Link CX 2 m (6.6 ft.) N-Type Male to N-Type Male

Note: This antenna is not FCC certified for use with the 5.3 GHz Link CX.

Using the Web-Based GUI User Interface 99

Appendix 3

Using the Web-Based GUI User Interface

30000

The Link CX includes its own HTML-based installation, operation and test Web pages, which can be

accessed locally using a Web browser on a Craft PC, or remotely using any Web browser on the same

network as the Link CX.

The rest of this Appendix includes information on:

•Section A3-1, Web Browser Requirements

•Section A3-2, Connecting A Web Browser

•Section A3-3, Accessing the Link CX Web Pages

•Section A3-4, Link CX Web Pages

A3-1 Web Browser Requirements

The Web browser used to install, operate, and maintain the Link CX must have an HTML-enabled

interface.

A3-2 Connecting A Web Browser

You must connect your Web browser to the Link CX; either locally using a Craft PC, or remotely using

any Web browser on the same Ethernet network as the Link CX. The web browser platform must have

an Ethernet adapter for connecting to the Link CX directly, or to the Link CX though other Ethernet

equipment.

A3-3 Accessing the Link CX Web Pages

Once your Web browser is connected to the Link CX as described in Section A3-2, you can access and

move through the configuration and maintenance pages as you would any other Web site. The rest of

this paragraph will describe how to access the Link CX Web pages.

A3-4 Link CX Web Pages

The following figures show the Link CX Web pages, and Chapter Four through Chapter Seven describe

how to use the Link CX Web pages to configure, install, and maintain the Link CX.

Following each figure will be a table describing individual parameter defaults and definitions.

100 Link CX User Manual, Version A

There may be a password required to access the Web pages, if enabled by the owner.

(To Be Determined)

Figure A3-1 Link CX Welcome Web Page

Using the Web-Based GUI User Interface 101

Figure A3-2 Link CX Monitor Web Page

102 Link CX User Manual, Version A

Figure A3-3 Link CX Commission Radio Web Page

Using the Web-Based GUI User Interface 103

Figure A3-4 Link CX Commission Manager Web Page

104 Link CX User Manual, Version A

Figure A3-5 Link CX Test Web Page

Using the Web-Based GUI User Interface 105

Figure A3-6 Link CX Update Software Web Page

106 Link CX User Manual, Version A

(this page intentionally left blank)

Grounding and Lightning Protection 107

Appendix 4

Grounding and Lightning Protection

40000

This appendix explains how to properly set up the Link CX radio and associated antenna for grounding

and lightning protection. It contains the following sections:

•Section A4-1, Overview

•Section A4-2, Grounding

•Section A4-3, Lightning Protection

•Section A4-4, Bibliography

A4-1 Overview

When used in telecommunications, good grounding practices have some direct benefits that can help

users maximize system uptime as well as ensure the safety of those people working on the system.

Among these benefits are:

•Protection of personnel from electric shock and fire hazards

•Reduction of radiated and conducted electromagnetic susceptibility

•Improved system tolerance to discharge of electrostatic energy and lightning interference

•Minimized service interruptions and service damage

No practice or formula can completely eliminate the above risks, but interWAVE believes that good

grounding and bonding practices can significantly reduce the risk of many of these hazards. This

appendix includes a bibliography that contains several publications that are readily available and provide

detailed information on many aspects of grounding systems and their design, implementation,

measurement, and maintenance.

Please note that every telecommunication site is unique and must be evaluated accordingly. The

following information is provided for generic reference and educational purposes only. The grounding

plans and practices for a given site should be established and implemented only by trained profes-

sionals, working in accordance with local practices and regulations.

interWAVE strongly recommends that you install a Transtector Lightning

Arrestor or equivalent at the cable entry to the Ethernet, Power, and/or

DS-3 equipment structure.

108 Link CX User Manual, Version A

A4-2 Grounding

A4-2.1 Making a Grounding Plan

A grounding plan should be developed at the outset of site design to provide the best grounding

procedures and to minimize ground loop currents. Grounding should be achieved by connecting the

outer conductors of the cables through a large-section copper strap to a central grounding point, and

the size of the conductor should be increased as each branch path is added. The final conductor should

be connected directly to the grounding system. For a radio site, a single copper grounding rod is insuf-

ficient, because its impedance is likely to be too high.

A4-2.2 Grounding Antenna Feeders

All antenna feeders should be bonded to the tower at the upper and lower ends and grounded at the

point of entry into the building. Weatherproof grounding kits are available from antenna manufacturers.

A4-2.3 Grounding Buildings

Ideally, a ground ring should surround the building and be connected to individual grounds associated

with feeder entry, antenna support structure, the building lightning conductor, the equipment room, the

main AC supply, and other facilities. Each connection should be made by the most direct route to

minimize interaction between the different grounding functions.

The ground ring should consist of copper cable or tape with electrodes two meters or longer, buried to

a depth of 0.6 m and at a distance from the building not to exceed 1 m.

Buildings may require lightning rods if they are not within the zone of another protected structure.

To construct a good ground, ground rods should penetrate the earth to a depth of about 2 m (6 feet).

Where the ground is in rocky terrain, make sure that the ground rods penetrate into loose soil. In sandy

soil, use more ground rods to make sure that the ground has sufficient contact with water-bearing

material.

Use 4 to 6 AWG wire to connect each ground rod to the equipment to be grounded. The cables should

be free of sharp bends. Each ground cable should be at least 2 m in length with at least 1 m separation

between each. Refer to local and national electrical codes to determine acceptable grounding methods.

The Link CX chassis should be directly connected to ground to ensure that it functions correctly.

In most cases, following the local code requirements for grounding and

lightning protection will be adequate.

Many of the cables used by interWAVE have braided rather than solid

outer conductors; this type of grounding is not appropriate. In these

cases surge arrestors approved by interWAVE should be used. For

information on surge arrestors, please contact the interWAVE Customer

Support department.

Grounding and Lightning Protection 109

A4-3 Lightning Protection

Radio sites can be particularly prone to lightning strikes by virtue of their normally exposed locations

and the presence of relatively tall antenna support structures.

Reference should also be made to various publications, some of which are listed in the bibliography.

Any site owner or user in doubt about the protection requirements for a particular location should

contact the appropriate authority.

A4-3.1 Purposes

The purposes of any protection arrangement should be to:

•Provide a suitable path to ground for the lightning current.

•Ensure adequate bonding between structures and all metalwork on the site and the common

grounding system in order to reduce side flashing.

•Prevent the entry of flashes or surges into the building.

The resistance to ground should be kept to a minimum; a value of less than 10 Ohms is recommended.

Ideally, and most important, the system should be at equal potential across the entire site.

Certain authorities and service providers have their own particular practices that have to be followed

where applicable.

Protection arrangements vary considerably, from very simple sites to complicated sites with multiple

buildings, antenna support structures, and associated equipment. Ensuring adequate protection may

also involve integration with and upgrading of existing systems.

A4-3.2 Lightning Conductors

Down conductors, bonding interconnections, ground rings, and radial tapes should be of uninsulated

000 AWG copper cable or solid copper tape with a minimum cross section of 25 mm by 3 mm, with all

connections protected by nonreactive paste.

Protected test points should be included if appropriate, and sacrificial ground lugs should be clearly

marked and easily accessible for periodic inspection.

A4-3.3 Grounding Antenna Support Structures

A structure generally acts as its own lightning conductor and, therefore, does not require an additional

conductor from the top to the base. A lightning rod may be required to extend the zone of protection to

equipment mounted on the top of the structure. The lightning rod should extend 2.5 m above the

highest equipment.

It is not possible to provide and guarantee complete protection from the

effects of lightning; however, risks of this sort can be significantly reduced

by careful attention to grounding, protection devices, and the layout of

the site itself.

110 Link CX User Manual, Version A

Ground-mounted support structures should be connected at their base to a ground ring through

sacrificial ground lugs. Towers should have a connection from each leg.

A ground ring should consist of copper cable or solid copper tape, with ground rods equally spaced at

2-m intervals around the base of the structure as close to it as possible. The ground ring is buried

approximately 0.6 m deep where soil conditions allow. An alternative method using radials rather than

rings is detailed in The “Grounds” for Lightning and EMP Protection, published by PolyPhaser

Corporation.

The ground ring should be connected to the main building ground by the most direct route, and should

be buried as appropriate.

Roof-mounted structures should be connected to the main building ground by the most direct route,

using sacrificial lugs and copper cable or tape as appropriate. Tower guy wires should be directly

bonded at their lowest point to a suitable ground electrode or connected to the site ground by the most

direct route.

A4-4 Bibliography

ITU - T K.40

Protection against LEMP in telecommunications centres

ITU - T K.27

Bonding configurations and earthing inside a telecommunication building

ITU - T K.35

Bonding configurations and earthing at remote electronic sites

ITU - T K.39

Risk assessment of damages to telecommunications sites due to lightning discharges

ITU - T Lightning Handbook

The protection of telecommunication lines and equipment against lightning discharges

IEEE Emerald Book

Powering and Grounding

The “Grounds” for Lightning and EMP Protection, second edition

Published by PolyPhaser Corporation

Enterprise MIBs and Traps 111

Appendix 5

Enterprise MIBs and Traps

50000

This appendix contains information about the three different sets of Link CX Management Information

Bases (MIBs), their current listings, and where to find the most current versions.

A5-1 Enterprise MIB

A5-1.1 Overview

The Link CX Enterprise MIB consists of the following groups of objects:

•link_cx_identity group: Model, revision, serial numbers, and channel frequency table.

Configured in the factory. Read-only by the customer.

•link_cx_configuration group: Channel number and other read-write parameters that the

customer chooses. This group is the system’s persistent state. It is preserved across

reboots.

•link_cx_status group: Performance and alarm status, read-only. Not preserved across

reboots.

•link_cx_test group: BERT, loopback, and other temporary state that the customer might use

in a test procedure. Read-write. Not preserved across reboots.

•link_cx_reboot group: Identifies the software versions that are available and controls reboot.

•link_cx_trap group: There is only one trap-related variable, trapSentCounter. It is not

preserved across reboots.

A5-1.2 Details

WN_LINK_CX-MIB DEFINITIONS ::= BEGIN

IMPORTS

enterprises, Counter

FROM RFC1155-SMI

OBJECT-TYPE

FROM RFC-1212;

interWAVE OBJECT IDENTIFIER ::= { enterprises 792 }

wavenet_link_cx OBJECT IDENTIFIER ::= { interWAVE 5 }

link_cx_identity OBJECT IDENTIFIER ::= { wavenet_link_cx 1 }

link_cx_configuration OBJECT IDENTIFIER ::= { wavenet_link_cx 2}

link_cx_status OBJECT IDENTIFIER ::= { wavenet_link_cx 3}

link_cx_test OBJECT IDENTIFIER ::= { wavenet_link_cx 4}

112 Link CX User Manual, Version A

link_cx_reboot OBJECT IDENTIFIER ::= { wavenet_link_cx 5}

link_cx_trap OBJECT IDENTIFIER ::= { wavenet_link_cx 6}

-- link_cx_identity group

unitModelNumber OBJECT-TYPE

SYNTAX DisplayString (SIZE (0..15))

ACCESS read-only

STATUS mandatory

DESCRIPTION

"The model number of the unit as a whole."

::= { link_cx_identity 1}

unitRevisionNumber OBJECT-TYPE

SYNTAX DisplayString (SIZE (0..15))

ACCESS read-only

STATUS mandatory

DESCRIPTION

"The revision number of the unit as a whole."

::= { link_cx_identity 2}

unitSerialNumber OBJECT-TYPE

SYNTAX DisplayString (SIZE (0..15))

ACCESS read-only

STATUS mandatory

DESCRIPTION

"The serial number of the unit as a whole."

::= { link_cx_identity 3}

boardModelNumber OBJECT-TYPE

SYNTAX DisplayString (SIZE (0..15))

ACCESS read-only

STATUS mandatory

DESCRIPTION

"The model number of the PCB board assembly."

::= { link_cx_identity 4}

boardRevisionNumber OBJECT-TYPE

SYNTAX DisplayString (SIZE (0..15))

ACCESS read-only

STATUS mandatory

DESCRIPTION

"The revision number of the PCB board assembly."

::= { link_cx_identity 5}

boardSerialNumber OBJECT-TYPE

SYNTAX DisplayString (SIZE (0..15))

ACCESS read-only

STATUS mandatory

DESCRIPTION

"The serial number of the PCB board assembly."

::= { link_cx_identity 6}

Enterprise MIBs and Traps 113

rfFrequencyTable OBJECT-TYPE

SYNTAX SEQUENCE OF RfChannelFreqEntry

ACCESS not-accessible

STATUS mandatory

DESCRIPTION

"The table of 2 selectable Tx/Rx frequency channel pairs, in MHz. The

receive frequency on a Tx-high unit is lower than the transmit frequency

by the amount of the Tx/Rx separation. Conversely, the receive frequency

on a Tx-low unit is higher than the transmit frequency by the amount of

the Tx/Rx separation."

::= { link_cx_identity 7}

rfFrequencyEntry OBJECT-TYPE

SYNTAX RfFrequencyEntry

ACCESS not-accessible

STATUS mandatory

DESCRIPTION

"Channel frequency entry."

INDEX { rfChannelIndex}

::= { rfFrequencyTable 1}

RfFrequencyEntry ::=

SEQUENCE {

rfChannelIndex

INTEGER,

rfTxFrequency

INTEGER,

rfRxFrequency

INTEGER

}

rfChannelIndex OBJECT-TYPE

SYNTAX INTEGER (1..2)

ACCESS read-only

STATUS mandatory

DESCRIPTION

"The RF channel number."

::= { rfFrequencyEntry 1}

rfTxFrequency OBJECT-TYPE

SYNTAX INTEGER

ACCESS read-only

STATUS mandatory

DESCRIPTION

"The transmit frequency in MHz."

::= { rfFrequencyEntry 2}

rfRxFrequency OBJECT-TYPE

SYNTAX INTEGER

ACCESS read-only

STATUS mandatory

114 Link CX User Manual, Version A

DESCRIPTION

"The receive frequency in MHz."

::= { rfFrequencyEntry 3}

-- link_cx_configuration group

rfTxAttenuateControl OBJECT-TYPE

SYNTAX INTEGER {

enabled(1),

disabled(2)

}

ACCESS read-write

STATUS mandatory

DESCRIPTION

"If enabled, attenuates the transmit output level by 40 dB."

::= }link_cx_configuration 1}

rfAtpcControl OBJECT-TYPE

SYNTAX INTEGER {

enabled(1),

disabled(2)

}

ACCESS read-write

STATUS mandatory

DESCRIPTION

"Automatic Tx Power Control mode can be enabled or disabled.

If enabled, the two Link CX radios at opposite ends of the

radio link send each other feedback messages that they use

to adjust their Tx power down to the lowest level that is

consistent with good signal quality."

::= }link_cx_configuration 2}

rfTxPowerLimit OBJECT-TYPE

SYNTAX INTEGER (-14..16)

ACCESS read-write

STATUS mandatory

DESCRIPTION

"Maximum transmit power level limit at the antenna port, in dBm.

The Tx power limit can be set in 1 dB steps within the range

of -14 dBm to +16 dBm. If Automatic Tx Power Control is enabled

the measured Tx power may be lower than this limit. If Automatic

Tx Power Control is disabled the measured Tx power should be

exactly the same as this target value."

::= }link_cx_configuration 3}

rfAtpcAddress OBJECT-TYPE

SYNTAX IpAddress

ACCESS read-write

STATUS mandatory

DESCRIPTION

"The IP Address of the peer radio with which this radio exchanges

Enterprise MIBs and Traps 115

Automatic Tx Power Control information."

::= }link_cx_configuration 4}

rfChannel OBJECT-TYPE

SYNTAX INTEGER (1..2)

ACCESS read-write

STATUS mandatory

DESCRIPTION

"The current transmit channel of the local unit. The transmit

frequency in MHz for each channel can be read in the rfFrequencyTable."

::= }link_cx_configuration 5}

rfRssiAlarmThresholdSetting OBJECT-TYPE

SYNTAX INTEGER (-80..-40)

ACCESS read-write

STATUS mandatory

DESCRIPTION

"A RSSI Alarm will be generated if the level of RSSI goes below

the set threshold. The threshold can be set in 1 dB steps

within the range of -80 to -40 dBm."

::= }link_cx_configuration 6}

ds3LosAlarmControl OBJECT-TYPE

SYNTAX INTEGER {

enabled(1),

disabled(2)

}

ACCESS read-write

STATUS mandatory

DESCRIPTION

"DS3 LOS alarm control. When enabled, the alarm will be generated.

When disabled, the alarm will not be generated even if

LOS condition is detected."

::= }link_cx_configuration 7}

-- link_cx_status group

rfPowerOutputLevel OBJECT-TYPE

SYNTAX INTEGER

ACCESS read-only

STATUS mandatory

DESCRIPTION

"The measured radio Tx power level in dBm."

::= }link_cx_status 1}

rfRssiLevel OBJECT-TYPE

SYNTAX INTEGER

ACCESS read-only

STATUS mandatory

DESCRIPTION

"The measured RSSI of the active channel in dBm. -110 dBm

116 Link CX User Manual, Version A

indicates the receive signal level is below the detection level."

::= }link_cx_status 2}

bitErrorRate OBJECT-TYPE

SYNTAX INTEGER

ACCESS read-only

STATUS mandatory

DESCRIPTION

"The estimated bit error rate (BER), in errors per 10^8 bits.

A returned value of 0 indicates zero bit errors in 10^8 bits.

A returned value of 1 indicates an estimated BER of 1x10^-8.

A returned value of 10 indicates an estimated BER of 1x10^-7,

and so on."

::= }link_cx_status 3}

losAlarmStatus OBJECT-TYPE -- DS3 interface alarm condition

SYNTAX INTEGER {

normal(1),

alarm(2)

}

ACCESS read-only

STATUS mandatory

DESCRIPTION

"A value of 1 indicates a DS3 connection is present.

A value of 2 indicates the DS3 connection has been lost.

If ds3LosAlarmControl = disabled, losAlarmStatus will

always be normal."

::= }link_cx_status 4}

txSynthLockAlarmStatus OBJECT-TYPE -- local alarm condition

SYNTAX INTEGER {

normal(1),

alarm(2)

}

ACCESS read-only

STATUS mandatory

DESCRIPTION

"The Tx synthesizer lock status.

A value of 1 indicates the Tx synthesizer is locked.

A value of 2 indicates the Tx synthesizer is unlocked"

::= }link_cx_status 5}

rxSynthLockAlarmStatus OBJECT-TYPE -- local alarm condition

SYNTAX INTEGER {

normal(1),

alarm(2)

}

ACCESS read-only

STATUS mandatory

DESCRIPTION

"The Rx synthesizer lock status.

Enterprise MIBs and Traps 117

A value of 1 indicates the Rx synthesizer is locked.

A value of 2 indicates the Rx synthesizer is unlocked"

::= }link_cx_status 6}

lowTxPowerAlarmStatus OBJECT-TYPE -- local alarm condition

SYNTAX INTEGER {

normal(1),

alarm(2)

}

ACCESS read-only

STATUS mandatory

DESCRIPTION

"A value of 1 indicates the Tx power at the antenna port

is greater than or equal to -14 dBm. A value of 2 indicates

the Tx power at the antenna port is less than -14 dBm."

::= }link_cx_status 7}

demodLockAlarmStatus OBJECT-TYPE -- link alarm condition

SYNTAX INTEGER {

normal(1),

alarm(2)

}

ACCESS read-only

STATUS mandatory

DESCRIPTION

"The demodulator lock status.

A value of 1 indicates the demodulator is locked.

A value of 2 indicates the demodulator is unlocked"

::= }link_cx_status 8}

lowRssiLevelAlarmStatus OBJECT-TYPE -- link alarm condition

SYNTAX INTEGER {

normal(1),

alarm(2)

}

ACCESS read-only

STATUS mandatory

DESCRIPTION

"A RSSI alarm will be generated if the level of RSSI goes below

the user configured RSSI alarm level, rfRssiAlarmThresholdSetting.

A value of 1 indicates the received signal level is above the RSSI

alarm threshold. A value of 2 indicates the received signal level

is at or below the user configured RSSI alarm level.

This alarm is valid only if the Rx synthesizer is locked."

::= }link_cx_status 9}

receiverOverloadAlarmStatus OBJECT-TYPE -- link alarm condition

SYNTAX INTEGER {

normal(1),

alarm(2)

}

118 Link CX User Manual, Version A

ACCESS read-only

STATUS mandatory

DESCRIPTION

"A receiver overload alarm will be generated if the level

of RSSI is at or above -40 dBm. A value of 1 indicates the

received signal level is below -40 dBm. A value of 2 indicates

the received signal level is at or above -40 dBm.

This alarm is only valid if the Rx synthesizer is locked."

::= }link_cx_status 10}

bitErrorRateAlarmStatus OBJECT-TYPE -- link alarm condition

SYNTAX INTEGER {

normal(1),

alarm(2)

}

ACCESS read-only

STATUS mandatory

DESCRIPTION

"A bit error rate alarm will be generated if the level

of BER is at or above 10^-3, i.e. if bitErrorRate is

equal to or greater than 100000."

::= }link_cx_status 11}

-- link_cx_test group

rfTxAttenuateTimer OBJECT-TYPE

SYNTAX INTEGER (0..1800)

ACCESS read-write

STATUS mandatory

DESCRIPTION

"To temporarily enable Tx attenuation by 40 dB, write the number of

seconds to this timer. When the timer counts down to 0, Tx attenuation

will return to its normal unattenuated state. Writing to this timer

has no effect if rfTxAttenuateControl is set to enable because in

that case the transmitter is already attenuated."

::= }link_cx_test 1}

ds3LocalLoopbackControl OBJECT-TYPE

SYNTAX INTEGER {

enabled(1),

disabled(2)

}

ACCESS read-write

STATUS mandatory

DESCRIPTION

"The DS3 local loopback control. When enabled, DS3 data on the

local interface is looped back through the local interface.

When disabled, DS3 data on the local interface is sent over

the radio link to the remote unit."

::= }link_cx_test 2}

Enterprise MIBs and Traps 119

rfLocalLoopbackTimer OBJECT-TYPE

SYNTAX INTEGER (0..1800)

ACCESS read-write

STATUS mandatory

DESCRIPTION

"When this value is greater than zero, the radio is in the local

loopback mode. The RF transmit signal on the local unit is

converted to the receive frequency of the local unit so it can

be received by the local unit, for the chosen period of time in

seconds. When this timer counts down to 0 the unit reverts to

normal operation in which the RF transmit signal on the local unit

is transmitted over the radio link to the remote unit. The duration

is selectable in 1 second intervals from 0 seconds to a maximum of

1800 seconds."

::= }link_cx_test 3}

ds3RemoteLoopbackControl OBJECT-TYPE

SYNTAX INTEGER {

enabled(1),

disabled(2)

}

ACCESS read-write

STATUS mandatory

DESCRIPTION

"The DS3 remote loopback control. When enabled, DS3 data on the remote

interface is looped back through the remote interface. When disabled,

DS3 data on the remote interface is sent over the radio link to the

local unit."

::= }link_cx_test 4}

ds3BerTestControl OBJECT-TYPE

SYNTAX INTEGER {

alternatingOnesZeros(1),

allOnes(2),

allZeros(3),

disabled(4)

}

ACCESS read-write

STATUS mandatory

DESCRIPTION

"BER test mode control. The BER test is enabled by selecting one of

three different data patterns. The patterns are:

(1) alternating 1’s and 0’s, (2) all 1’s, and (3) all 0’s.

The BER test is disabled by setting the BER test control to 4."

::= }link_cx_test 5}

pseudoAisControl OBJECT-TYPE

SYNTAX INTEGER {

enabled(1),

disabled(2)

}

120 Link CX User Manual, Version A

ACCESS read-write

STATUS mandatory

DESCRIPTION

"When enabled, pseudo-AIS (constant mark or all ones at the DS3

interface) will be generated."

::= }link_cx_test 6}

-- link_cx_reboot group

softwareVersionBank1 OBJECT-TYPE

SYNTAX DisplayString (SIZE (0..15))

ACCESS read-only

STATUS mandatory

DESCRIPTION

"The software version in bank one."

::= }link_cx_reboot 1}

softwareVersionBank2 OBJECT-TYPE

SYNTAX DisplayString (SIZE (0..15))

ACCESS read-only

STATUS mandatory

DESCRIPTION

"The software version in bank two."

::= }link_cx_reboot 2}

bootedUsingBankNumber OBJECT-TYPE

SYNTAX INTEGER {

bankOne(1),

bankTwo(2)

}

ACCESS read-only

STATUS mandatory

DESCRIPTION

"The software bank from which the unit booted."

::= }link_cx_reboot 3}

bootUsingBankNumber OBJECT-TYPE

SYNTAX INTEGER {

bankOne(1),

bankTwo(2)

}

ACCESS read-write

STATUS mandatory

DESCRIPTION

"Selects the software bank and causes reboot."

::= }link_cx_reboot 4}

-- traps

trapSentCounter OBJECT-TYPE

SYNTAX Counter

Enterprise MIBs and Traps 121

ACCESS read-only

STATUS mandatory

DESCRIPTION

"Total number of enterprise traps sent since last reboot."

::= }link_cx_trap 1}

link_cx_unit OBJECT IDENTIFIER ::= }wavenet_link_cx 101}

alarmTrap TRAP-TYPE

ENTERPRISE link_cx_unit

VARIABLES }rfPowerOutputLevel,

rfRssiLevel,

bitErrorRate,

losAlarmStatus,

txSynthLockAlarmStatus,

rxSynthLockAlarmStatus,

lowTxPowerAlarmStatus,

demodLockAlarmStatus,

lowRssiLevelAlarmStatus,

receiverOverloadAlarmStatus,

bitErrorRateAlarmStatus,

trapSentCounter}

DESCRIPTION

"A trap that indicates a change in one or more of the alarm conditions."

::= 1

configurationChangeTrap TRAP-TYPE

ENTERPRISE link_cx_unit

VARIABLES }rfTxAttenuateControl,

rfAtpcControl,

rfTxPowerLimit,

rfAtpcAddress,

rfChannel,

rfRssiAlarmThresholdSetting,

ds3LosAlarmControl,

trapSentCounter}

DESCRIPTION

"A trap that indicates a configuration change."

::= 2

unitTestTrap TRAP-TYPE

ENTERPRISE link_cx_unit

VARIABLES }rfTxAttenuateTimer,

ds3LocalLoopbackControl,

rfLocalLoopbackTimer,

ds3RemoteLoopbackControl,

ds3BerTestControl,|

pseudoAisControl,

trapSentCounter }

DESCRIPTION

"A trap that indicates the beginning or end of a test procedure.

122 Link CX User Manual, Version A

An alarmTrap trap might result from this procedure."

::= 3

END

A5-2 Enterprise Traps

Link CX supports three enterpriseSpecific traps - alarmTrap, configurationChangeTrap, and unitTest-

Trap. Each of these traps contains all the relevant variables for that particular trap, in order to minimize

polling. One variable that is in each of the traps is a counter, so that the network management

application can detect loss of traps.

A5-2.1 alarmTrap

Link CX sends this trap when any of the alarm variables changes, either going into or out of an alarm

condition. All of the relevant alarm conditions and performance data are contained in the trap PDU,

along with a counter of enterprise traps sent. The variables include:

•trap counter

•DS3 LOS status (DS3 input absent/present)

•Tx Power status (under/over minimum power)

•Tx Synthesizer lock status (unlocked/locked)

•Rx Synthesizer lock status (unlocked/locked)

•RSSI level status (under minimum level)

•Rx overload status (over maximum level)

•BER status (over threshold)

•demodulator lock status (unlocked/locked)

•BER

•RSSI

•Tx Power

A5-2.2 configurationChangeTrap

Link CX sends this trap when the persistent state of the Link CX changes. This trap alerts the network

management application that it must refresh its database. If all management is through SNMP

exclusively, this trap is redundant. If on the other hand, management is a mixture of HTTP and SNMP

this will keep the SNMP side completely consistent. All the relevant persistent state variables are

contained in the trap PDU, along with the trap counter. The variables include:

•trap counter

•Tx control (attenuated/unattenuated)

•ATPC control (ATPC enabled/disabled)

Enterprise MIBs and Traps 123

•Tx power setting

•ATPC peer IP address (IP address of the CX at the other end of the radio link)

•channel number

•RSSI alarm threshold

•DS3 LOS control (enable/disable alarm for LOS)

A5-2.3 unitTestTrap

Link CX sends this trap when any of the test variables change, either at the start or at completion of a

test. All the test state variables are contained in the trap PDU, along with the trap counter. This trap alerts

the management application that a change has taken place that will probably result in an alarmTrap

before too long (in case it doesn’t already know, and in case it wants to distinguish between this case

and spontaneous alarmTraps). The state variables in the trap PDU include:

•trap counter

•DS3 local loopback

•DS3 remote loopback

•radio loopback

•pseudoAIS

•BERT

•temporary Tx attenuation

124 Link CX User Manual, Version A

(this page intentionally left blank)

Index 125

Index

60000

antennas

grounding antenna feeders 108

grounding support structures 108

beam clearance

envelope at midpath 26

error messages

monitoring 84

grounding

antenna feeders 108

buildings 108

lightning, see lightning protection

interWAVE

return materials authorization (RMA) xiv

sales operations xiv

training xiv

ITU bibliography 110

lightning protection

grounding antenna support structures 109

importance of 109

lightning conductors 109

purposes 109

Link CX

overview 1

126 Link CX User Manual, Version A

messages

SNMP monitoring error 84

monitoring and trend analysis

error messages and traps 84

Web browser interface

SNMP network management stations 83

network management stations, see SNMP

return materials authorization (RMA) xiv

RMA xiv

sales operations xiv

SNMP

alarm messages 84

network management stations 83

traps 84

The "Grounds" for Lightning and EMP Protection 110

training xiv

traps, SNMP 84

Troubleshooting 85

Notes

Notes:

Part Number 100757-001

5/02 Version A

* * * * * * * * * * * * * * * * * *

This is the last page of this document.

This notice complies with ISO9001 requirements

and ensures the reader is working from a complete document.

* * * * * * * * * * * * * * * * * *

interWAVE Communications, Inc.

312 Constitution Drive

Menlo Park, CA, USA 94025

Phone: 1.650.838.2000

ADC Telecommunications CX-DS3-53G Point to Point DSX3 / IP Transceiver User Manual interWave WaveNet Link CX

ADC Telecommunications Inc. Point to Point DSX3 / IP Transceiver interWave WaveNet Link CX

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