Wave Wireless AIRLINKPRO User Manual

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Release Date: February, 1997

Installer’s Guide

CYLINK CORPORATION  910 Hermosa Court Sunnyvale, California 94086, USA (408) 735-5800 CYLINK LIMITED U.K. Tel: +44-1256-841919 Fax: +44-1256-24156 CYLINK CORPORATION (Singapore) Tel: +65-297-6196 Fax: +65-297-6195 CYLINK CORPORATION (New Delhi) Tel/Fax: +91-11-617-6913 CYLINK CORPORATION (Beijing) Tel: +81-10-6467-1905 Fax: +86-10-6467-1906  CYLINK CORPORATION (Karachi) Tel: +92-21-5840743 Fax: +92-21-5840727 CYLINK CUSTOMER SUPPORT 1-800-545-6608 (USA - California) 1-800-814-5587 (USA - New Jersey) 1-408-735-5822 (International - California) 1-201-333-3400 (International - New Jersey) +44-1256-58122 (Cylink Limited - U.K.) 

AirLink Pro 64S

Cylink Corporation provides this Manual “as is,” without warranty of any kind, either express or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Cylink Corporation may make improvements and changes to the product described in this Manual at any time and without any notice. Cylink Corporation assumes no responsibility for its use, nor any infringements of patents or other rights of third parties that would result.

This Manual could contain technical inaccuracies or typographical errors. Periodic changes are made to the information contained herein; these changes will be incorporated in new editions of the Manual.

No part of this publication may be stored in a retrieval system, transmitted, or reproduced in any way, including but not limited to photocopy, photograph, magnetic or other records, without the prior written permission of Cylink Corporation.

CYLINK is a registered trademark of Cylink Corporation; AirLink is a trademark of Cylink Corporation. Windows™ is a trademark of Microsoft Corporation. ProComm is a registered trademark of Datastorm

Technologies, Inc. All other brand and product names are the trademarks of their respective holders.

PRODUCT COMPATIBILITY

While every effort has been made to verify operation of this product with many different communications products and networks, Cylink Corporation makes no claim of compatibility between its products and other vendors’ equipment. It is assumed that users have thoroughly evaluated this product’s performance in the communications environment in which it will be used.

SAFETY

The following general safety precautions must be observed during all phases of operation and service of this product. Failure to comply with these precautions or with specific warnings elsewhere in this Manual willfully violates standards of design, manufacture, and intended use of the product. Cylink Corporation assumes no liability for the customer’s failure to comply with these requirements.

This product must be grounded. In the event of a short circuit, grounding reduces the risk of electrical shock by providing an escape wire for the current.

Do not install or operate this product in the presence of flammable gases or fumes. Operation of any electrical instrument in such an environment constitutes a definite safety hazard.

No user maintained or adjustable components are present within this product. The covers should not be removed by anyone other than authorized Cylink service personnel. The potential for electrical shock exists within the enclosure at all times unless it is unplugged.

Do not install substitute parts or perform any unauthorized modification to the AirLink Pro 64S. Return the product to Cylink Corporation for service and repair to ensure that safety features are maintained. Prior to returning any product(s) for repair, contact Cylink at the telephone numbers or address located on the front of this Manual, and obtain a Return Material Authorization (RMA) number.

Changes or modifications not expressly approved by Cylink Corporation can void the user’s authority to operate the equipment.

LITHIUM BATTERY

The digital module in the AirLink Pro 64 contains a lithium battery molded into the real-time clock component (see Appendix B for the life span of the battery). The lithium battery is NOT a customer-replaceable part. The lithium battery could explode if mistreated. Do not attempt to expose the battery by opening the real-time clock component. Do not attempt to recharge the battery. Do not dispose of the component by fire.

SYSTEM GROUNDING

Direct grounding of the antenna, mast, and tower serves as protection from lightning strikes and static buildup. A direct electrical connection should be made to a suitable grounding rod at the base of the tower or mast using at least one-inch wide copper grounding strap, or its equivalent, and non corrosive hardware. For details and safety standards, consult the appropriate local Electrical Codes or a similar document. Use lightning arrestors in appropriate places.

TOWER CONSTRUCTION

Compliance with local zoning and tower construction regulations is recommended when AirLink Pro 64 systems require a tower. These regulations generally mandate that permits be obtained before any tower construction begins. Check with local zoning and aviation authorities for more information.

FCC NOTICE TO USERS

The AirLink Pro 64S complies with Part 15 of the FCC rules. Operation is subject to the condition that this device does not cause harmful interference.

Federal Communications Commission (FCC) Rules on spread spectrum devices, such as the AirLink Pro 64S, require that you be notified of the following:

FCC regulations require that this device be professionally installed by a person knowledgeable in electronics and trained in the correct installation of this device.

All interface cables must be shielded. Operation of this device is subject to the following two conditions: (1) This device may not cause harmful interference. (2) This device must accept any interference that may cause undesired operation.

CANADIAN NOTICE TO USERS

This class B digital apparatus meets all the requirements of the Canadian Interference-Causing Equipment Regulations.

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

Changes or modifications not expressly approved by Cylink Corporation can void the user’s authority to operate the equipment.

STATEMENT OF WARRANTY

CYLINK products, except as stated otherwise in an applicable price list, are warranted against defects in workmanship and material for a period of one (1) year from date of delivery as evidenced by CYLINK’s packing slip or other transportation receipt.

CYLINK’s sole responsibility under this warranty shall be to either repair or replace, at its option, any component which fails during the applicable warranty period because of a defect in workmanship and material, provided PURCHASER has promptly reported same to CYLINK in writing. All replaced Products or parts shall become Cylink’s property.

CYLINK shall honor the warranty at CYLINK’s repair facility in Sunnyvale, California. It is PURCHASER’s responsibility to return, at its expense, the allegedly defective Product to CYLINK. PURCHASER must obtain a Return Materials Authorization (RMA) number and shipping instructions from CYLINK prior to returning any Product under warranty. Transportation charges for the return of the Product to PURCHASER shall be paid by CYLINK within the United States. For all other locations, the warranty excludes all costs of shipping, customs clearance and other related charges. If CYLINK determines that the Product is not defective within the terms of the warranty, PURCHASER shall pay CYLINK all costs of handling, transportation and repairs at the then prevailing repair rates.

All the above warranties are contingent upon proper use of the Product. These warranties will not apply (i) if adjustment, repair or parts replacement is required because of accident, unusual physical, electrical or electromagnetic stress, negligence of PURCHASER, misuse, failure of electric power environmental controls, transportation, not maintained in accordance with CYLINK specifications, or abuses other than ordinary use (ii) if the Product has been modified by PURCHASER or has been repaired or altered outside CYLINK’s factory, unless CYLINK specifically authorizes such repairs or alterations; (iii) where CYLINK serial numbers, warranty data or quality assurance decals have been removed or altered.

CYLINK also reserves the right to make product improvements without incurring any obligation or liability to make the same changes in Products previously manufactured or purchased. In no event shall CYLINK be liable for any breach of warranty in an amount exceeding the net selling price of any defective Product. No person, including any dealer, agent or representative of CYLINK is authorized to assume for CYLINK any other liability on its behalf except as set forth herein. Nonpayment of any invoice rendered within the stated payment terms automatically cancels any warranty or guarantee stated or implied. If any payment is due CYLINK for services performed here under, it shall be subject to the same payment terms as the original purchase.

CYLINK HEREBY DISCLAIMS ALL IMPLIED WARRANTIES ON PRODUCTS INCLUDING WITHOUT LIMITATION, ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. The warranties expressly stated herein are the sole obligation or liability on the part of CYLINK arising out of or in connection with the sale or performance of the products.

Products Manufactured by Others - For products not manufactured by CYLINK the original manufacturer’s warranty shall be assigned to PURCHASER to the extent permitted and is in lieu of any other warranty, express or implied. For warranty information on a specific product, a written request should be made to CYLINK.

IN NO EVENT WILL CYLINK BE LIABLE TO PURCHASER FOR (i) REPROCUREMENT COSTS; (ii) SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES; (iii) ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS ARISING OUT OF OR IN CONNECTION WITH THIS AGREEMENT, OR THE USE OF PERFORMANCE OF CYLINK PRODUCTS, REGARDLESS OF WHETHER THE CAUSE OF ACTION IS IN CONTRACT, TORT, INCLUDING NEGLIGENCE, OR ANY OTHER FORM.

No action, whether in contract or tort, including negligence, arising out of or in connection with this Agreement, may be brought by either party more than eighteen (18) months after the cause of action has accrued, except that an action for nonpayment may be brought within eighteen (18) months of the date of last payment.

Table of Contents

Preface ......................................................................................................xiii

Who Should Read This Guide.............................................................. xiv

Prerequisite Knowledge ....................................................................... xiv

Guide Organization ............................................................................. xiv

Guide Conventions ................................................................................ xv

Typographic Conventions .............................................................. xvi

Keyboard Usage..............................................................................xvi

Notes, Cautions, and Warnings ..................................................... xvii

Customer Support ............................................................................... xvii

Reader Response ............................................................................... xviii

Chapter 1: Product Description................................................................... 1-1

Introduction to the AirLink Pro 64S....................................................... 1-2

Features and Capabilities ................................................................... 1-3

AirLink Pro 64S Antenna.................................................................1-4

Network Management Ports.............................................................1-4

Programmed Configuration Parameters .......................................... 1-5

Monitoring and Diagnostic Capabilities ......................................... 1-5

AirLink Pro/AirLink One Compatibility.........................................1-6

Chapter 2: Installation.............................................................................. 2-1

Overview............................................................................................ 2-2

Unpacking ........................................................................................... 2-2

Identifying Physical Features.............................................................. 2-3

Front Panel.................................................................................... 2-3

Rear Panel..................................................................................... 2-5

Site Preparation...................................................................................2-5

General Physical and Environmental Characteristics.......................2-5

Lightning Protection........................................................................2-6

Power Requirements....................................................................... 2-6

Setting Up the System.......................................................................... 2-6

Installing the Antenna ................................................................... 2-6

Installing the AirLink Pro 64S.........................................................2-8

Batch File Handling.....................................................................2-16

Burst Synchronization .................................................................. 2-17

Checking Operation ........................................................................... 2-28

Power-Up LED Sequence................................................................2-28

Initial Unit Configuration ............................................................ 2-29

Aligning the Antenna ................................................................... 2-31

Chapter 3: Configuration ........................................................................... 3-1

Overview ............................................................................................ 3-2

Using the ASCII Terminal Interface ..................................................... 3-2

Command Line Interface................................................................. 3-2

Command Keyword List ................................................................. 3-4

Administrative Parameters ................................................................. 3-7

Site Name ..................................................................................... 3-7

Date and Time ............................................................................... 3-8

Password ....................................................................................... 3-9

Setting Link Parameters ..................................................................... 3-10

Application ................................................................................. 3-12

Configuring the DTE Interface.............................................................3-15

DTE Mode.....................................................................................3-15

DTE Protection..............................................................................3-16

Data Rate..................................................................................... 3-17

Comm Mode..................................................................................3-17

RTS Source....................................................................................3-18

RTS Delay....................................................................................3-18

Configuring for Different Synchronous Data Clock Modes.....................3-18

AirLink One Clock Mode Emulation.....................................................3-21

DCE/ST........................................................................................3-21

DCE/TT........................................................................................3-21

DTE/TT........................................................................................3-22

HUB/ST.......................................................................................3-22

Independent Network Clocks...............................................................3-22

Independent Clocks in a Point-to-Point Link...................................3-23

Independent Clocks In a Hub..........................................................3-24

Configuring the RF Link......................................................................3-24

PN................................................................................................3-25

Range...........................................................................................3-25

RF Plan.........................................................................................3-26

RF Power......................................................................................3-26

RF Sleep.......................................................................................3-26

Setting Alarm Control Parameters.......................................................3-26

Alarm Reporting .......................................................................... 3-26

Alarm Level ................................................................................. 3-27

Alarm Holdoff..............................................................................3-27

HUB_SYNC.................................................................................3-27

Threshold RSSI ............................................................................ 3-27

Threshold RSQ ............................................................................ 3-27

Threshold 1HR ES........................................................................ 3-27

Threshold 1HR UAS .................................................................... 3-28

Threshold 24 HR ES......................................................................3-28

Threshold 24 HR UAS...................................................................3-28

Other Command Keywords and Operands ........................................... 3-28

Setting Modem Parameters..................................................................3-29

Connection and Configuration........................................................3-30

Functions.......................................................................................3-33

RS-232 Modem Port Interface.........................................................3-36

User Interface Additions...............................................................3-38

Chapter 4: Operations and Maintenance ..................................................... 4-1

Overview ............................................................................................ 4-2

Acquiring Status Information ............................................................... 4-2

Viewing Status Information ........................................................... 4-2

Acquiring Alarm Information ............................................................... 4-7

The Event Queue ............................................................................ 4-8

Acquiring Performance Information ..................................................... 4-10

Viewing Performance Information ................................................. 4-10

Resetting Performance Counters ..................................................... 4-12

Diagnostic Tools..................................................................................4-13

vii

Appendix A: Messages .............................................................................. A-1

General Information ........................................................................... A-2

Major Alarm Messages ........................................................................ A-3

Minor Alarm Messages ........................................................................ A-3

Status Messages .................................................................................. A-4

Appendix B: Specifications ........................................................................ B-1

General Specifications ......................................................................... B-2

Operating and Environmental Specifications..................................B-2

Mechanical Specifications.............................................................B-3

Power............................................................................................ B-3

Interface Specifications ....................................................................... B-3

DTE Specifications......................................................................... B-3

Radio Interface ............................................................................. B-5

Signal-to-Pin Assignments ................................................................... B-8

Network Management.................................................................... B-8

AC Power.......................................................................................B-6

Antenna Connector..........................................................................B-9

Burst Sync Connector......................................................................B-10

DTE Connectors.............................................................................B-10

Crossover Data Cable Specifications............................................ B-13

Code of Federal Regulations................................................................B-14

viii

Appendix C: Worksheets ........................................................................... C-1

Appendix D: Commands.............................................................................D-1

Appendix E: Glossary..................................................................................E-1

Index ................................................................................................... Index-1

Figures

1-1 AirLink Pro 64S - Full View.............................................................1-2

1-2 Point-to-Point Application Showing Master/Slave Configuration....1-4

1-3 Point-to-Multipoint Application.....................................................1-4

2-1 AirLink Pro 64S Front Panel.............................................................2-3

2-2 AirLink Pro 64S Rear Panel.............................................................2-5

2-3 Typical Antenna Mounts..................................................................2-7

2-4 Terminal Connection........................................................................2-9

2-5 Terminal Emulation......................................................................2-11

2-6 Terminal Preferences.....................................................................2-12

2-7 Communications............................................................................2-13

2-8 Ports.............................................................................................2-14

2-9 Settings for Com 1..........................................................................2-14

2-10 Advanced Settings for Com 1..........................................................2-15

2-11 Modem Connection to the AirLink Pro 64S......................................2-16

2-12 Burst Synchronization Structure.....................................................2-18

2-13 TDD Burst Structure......................................................................2-19

2-14 Burst Sync Wiring.........................................................................2-20

2-15 Burst Sync Backup.........................................................................2-21

2-16 Burst Sync Compatibility .............................................................2-25

2-17 Burst Sync Compatibility..............................................................2-27

3-1 Point-to-Point Application............................................................3-11

3-2 Point-to-Multipoint Application...................................................3-12

3-3 Hub Application...........................................................................3-13

3-4 AirLink Pro 64S Two Part Repeater Link........................................3-14

3-5 Independent Network Clocks.........................................................3-23

4-1 AirLink Pro 64S Loopback Tests.....................................................4-14

4-2 AirLink Pro 64S in Test Loopback Local..........................................4-15

4-3 AirLink Pro 64S in Remote Test Loopback Local..............................4-16

4-4 AirLink Pro 64S in Test Loopback Remote.......................................4-17

4-5 AirLink Pro 64S in Remote Test Loopback Remote...........................4-18

4-6 Asserted RTS in Multipoint Configuration......................................4-20

B-1 DB9 Female Network Management Connector.................................B-9

B-2 DB25 Female DTE Connector..........................................................B-10

Tables

2-1 AirLink Pro 64S Front Panel Indicators.............................................2-4

2-2 AirLink Pro 64S Rear Panel Connectors.............................................2-5

2-3 Voltage Requirements.....................................................................2-6

2-4 Normal Burst Sync Activity..........................................................2-23

2-5 Bus A Activity Lost.......................................................................2-23

2-6 Bus B Activity Lost.......................................................................2-24

2-7 Bus A and Bus B Activity Lost........................................................2-24

2-8 LED Indicators..............................................................................2-28

2-9 Error Codes...................................................................................2-29

2-10 Signal Quality..............................................................................2-32

3-1 Voltage Requirements DTE Protect Configuration...........................3-17

3-2 Applications with Clock Modes.....................................................3-19

3-3 Terminal Commands of the Modem (Port) Interface........................3-32

3-4 Modem Response Definitions.........................................................3-37

3-5 Modem Commands.........................................................................3-38

3-6 Dial Out Parameters.....................................................................3-39

4-1 Receive Signal Quality...................................................................4-6

A-1 Major Alarm Messages....................................................................A-3

A-2 Minor Alarm Messages...................................................................A-3

A-3 Status Messages.............................................................................A-4

B-1 Operating and Environmental Specifications..................................B-2

B-2 Mechanical Specifications.............................................................B-3

B-3 Power Specifications......................................................................B-3

B-4 DTE Specifications.........................................................................B-4

B-5 General Specifications...................................................................B-5

B-6 Transmitter....................................................................................B-6

B-7a Channel Plan 1...............................................................................B-6

B-7b Channel Plan 2...............................................................................B-7

B-8 Receiver........................................................................................B-7

B-9 Data Interface Standards...............................................................B-8

B-10 Terminal Connection.......................................................................B-9

B-11 RS-232 Pin Assignments.................................................................B-11

B-12 EIA-530 and V.35 Pin Assignments.................................................B-12

B-13 EIA 530 25-Pin Male Connectors.....................................................B-13

B-14 RS-232 25-Pin Male Connectors......................................................B-13

B-15 Point-to-Point Maximum Delay.....................................................B-14

REFACE

About This Guide

The AirLink Pro 64S Installer’s Guide covers the information needed to unpack, install, configure, and operate the AirLink Pro 64S system. Begin by reading this preface for more information about how this guide supports your use of the AirLink Pro 64S system.

Inside this chapter:

Who Should Read This Manual...............................................xiv

Prerequisite Knowledge .......................................................xiv

Guide Organization..................................................................xiv

Conventions Guide....................................................................xv

Customer Support ............................................................... xvii

Reader Response ................................................................. xviii

Rev. B - 2/97 xiii

AirLink Pro 64S Installer’s Guide About This Guide

Who Should Read This Manual

This is an installation guide for persons who must perform or coordinate the tasks associated with unpacking and installing the AirLink Pro 64S.

Prerequisite Knowledge

Throughout this guide are explanations and procedures that presume working familiarity with basic telephone trunking and transmission concepts and practices, as well as basic digital data communications concepts and practices. If you are not familiar with the concepts and practices involved in these disciplines, we recommend that you familiarize yourself with them before proceeding.

Also, this guide does not attempt to provide any detailed system planning or installation information on radio frequency (RF) antenna assemblies or Path analysis. For details about these topics, please refer to the AirLink Site Planning Guide .

Guide Organization

Each of the chapters and appendices in this guide begins by introducing the contents of that chapter or appendix. Before beginning the installation process, read the introductions to all of the guide portions so that you have a sense of what each portion provides.

When you come to a procedure, skim through the entire procedure before you begin performing the step-by-step instructions. By doing this, you will be prepared with the appropriate information, equipment, or tools.

The information in this guide is organized according to the sequence of tasks necessary to plan for unpacking, installing, and configuring, as well as operating and maintaining the AirLink Pro 64S system.

xiv Rev. B - 2/97

The guide is divided into the following sections:

Guide Section Description

AirLink Pro 64S Installer’s Guide

About This Manual

Chapter 1: Product Description

Chapter 2: Installation

Chapter 3: Configuration

Chapter 4: Operations and Maintenance

Appendix A: Messages

Appendix B: Specifications

Appendix C: Worksheets

Appendix D Commands

Appendix E: Glossary

Index Provides a quick reference to assist you in locating

Describes the features and capabilities of the AirLink Pro 64S system.

Outlines the procedures for unpacking and installing the AirLink Pro 64S system hardware, connecting the antenna, and performing initial operation checks.

Provides instructions for configuring the AirLink Pro 64S.

Contains information on the operation and maintenance of the AirLink Pro 64S system.

Lists the system alarm, status, and error messages.

Contains a quick reference to the AirLink Pro 64S system specifications.

Worksheets are provided to help the user write down configuratin parameters for reference.

Contains list of the Commands needed to configure and operate the AirLink Pro 64S.

Provides definitions for the terms commonly used throughout this guide.

important topics in the guide.

Guide Conventions

The procedures and instructions in this guide use the following conventions: ❚ Typography that highlights information within text, including screen

displays, figures, and tables.

❚ Keyboard usage conventions. ❚ Notes that add information, point to other important considerations, or

alert you to possible risks to yourself, your equipment, or your data.

Rev. B - 2/97 xv

AirLink Pro 64S Installer’s Guide About This Guide

Typographic Conventions

❚ Terminal displays are shown as text in the Courier font ( this is just an

example, your configuration will probably be different):

AIRLINK PRO > Get Configuration Site Name: Application: 2. Master Unit in a Point-to-Point Link PN Code: 1 RF Channel Plan: 20 channels RF Channel: 1 RF Frequency: 2404.468 RF Power: 0 dBm RF sleep: NO Comm Mode: Synchronous Data Rate: 4.8 Kbps Burst Timing: Receive sync Tx Clock Source: Internal Tx VCXO Ref Free Run Hub Sync: Single RTS Source: Internal RTS delay: 0 msec DTE mode: RS-232 DTE Protect: Disabled Alarm Reporting: Request Alarm Level: Status Date/Time: 01 Sept 1996 10:35:00

❚ Bold Courier font indicates a command keyword or operand that you

are expected to type exactly as shown.

❚ Italic Courier font indicates a command operand that you must

replace with a selected value when you type the command.

❚ Named keys in text are shown enclosed in angle brackets. The notation

<Return> is used to indicate either the Return key or the Enter key.

Keyboard Usage

❚ All command examples shown in text are executed by typing the command

and then pressing <Return>.

❚ Two or more keys that must be pressed simultaneously are shown in text

linked with a plus (+) sign: <Ctrl>+C.

xvi Rev. B - 2/97

Notes, Cautions, and Warnings

NOTE The standard text note highlights important or additional

CAUTION These notes warn you of situations that could result in damage

WARNING These notes warn you of situations that could endanger your

Customer Support

AirLink Pro 64S Installer’s Guide

About This Manual

information for you to consider.

to your equipment or loss of data if you do not heed the instructions.

personal health if you do not heed the instructions.

If after reading this guide you encounter any trouble installing or using the AirLink Pro 64S, please contact your local distributor. Cylink distributors are authorized local service providers and are responsible for immediate support. If problems are not resolved, you can call Cylink’s Customer Service for assistance. A 24 hour answering service is maintained for after hours emergency telephone technical support. Emergency requests for phone support are dispatched by the answering sevice. Cylink Technical support responses to emergency calls consist of over the phone troubleshooting and assistance in obtaining distribution support. The telephone numbers are:

Domestic (USA)

1-800-545-6608 Sunnyvale, CA

International

1-408-735-5822 Sunnyvale, CA

+65-297-6196 Singapore

+44-1256-58122 United Kingdom

+91-11-301-0090 India

+92-21-215-7264 Pakistan

Rev. B - 2/97 xvii

AirLink Pro 64S Installer’s Guide About This Guide

Domestic and International Customer Service Fax

1-408-735-6641 Sunnyvale, CA +65-297-6195 Singapore +44-1256-24156 United Kingdom +91-11-379-3584 India +92-21-587-0065 Pakistan

You can also contact Cylink’s Tech Support through the Internet at the following address:

If you need to return equipment, call Customer Service to obtain a Return Material Authorization (RMA) number prior to returning the equipment. The RMA number must be placed on the outside of the shipping carton. Please be prepared to provide the unit serial number, software version, and a detailed description of the problem. Return all equipment to:

support@cylink.com

Cylink Corporation

910 Hermosa Court

Sunnyvale, CA 94086

Attn: Repair and Return Department

Reader Response

Cylink’s Technical Publications Department wants its documents to meet your requirements. To this end, your ideas about the documentation are valuable. After you have had a chance to read and use the guide, we encourage you to submit your comments to

You may also submit your comments through the Internet at the following address:

Cylink may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligations whatsoever.

RMA No: xxxxxxxxxx

Manager, Technical Publications

Cylink Corporation

910 Hermosa Court

Sunnyvale, CA 94086

techpubs@cylink.com

xviii Rev. B - 2/97

HAPTER

Product Description

This chapter introduces the AirLink Pro 64S and provides an overview of the features and capabilities.

Inside this chapter:

Introduction to the AirLink Pro 64S................................1-2

Features and Capabilities ...................................................1-3

Rev. B - 2/97 1-1

AirLink Pro 64S Installer’s Guide Product Description

Introduction to the AirLink Pro 64S

The AirLink Pro S-Band family of digital microwave radios are spreadspectrum transceivers that operate in the 2400 - 2483.5 MHz Industrial Scientific Medical (IS) band. The AirLink Pro 64S uses a Spread Spectrum modulation technique to create high-quality, point-to-point and point-tomultipoint radio links between itself and other AirLink Pro 64S modems located at distant sites.

The AirLink Pro 64S is a compact table top unit (see Figure 1-1), which can also be rack mounted.

1-2

Figure 1-1

AirLink Pro 64S- Full View

Rev. B - 2/97

Features and Capabilities

The AirLink Pro 64S supports a range of sophisticated control capabilities and options, including:

❚ Flexible, interactive user interface through an ASCII terminal ❚ Easily modified configuration parameters ❚ Software configuration ❚ Built in testing ❚ Operating range up to 30 miles (50 km) between units (subject to local radio

regulations)

❚ Local and remote monitoring, diagnostic, and maintenance capabilities ❚ Every radio-frequency (RFD) burst verified by an error-checking algorithm

AirLink Pro 64S Installer’s Guide

Product Description

❚ Modem dial-in/dial-out control at the network management ports ❚ RS-232, V.35, and EIA-530 interfaces supported with one unit ❚ Burst sync compatibility with AirLink One S-Band modems ❚ Redundant burst sync ❚ Optional Rugged Enclosure

In a typical redundant installation, an AirLink Pro 64S operates in a point-topoint or point-to-multipoint environment. In a point-to-point setup, there is one master and one slave modem linked by radio. The master modem is the bursttiming synchronizer of the radio link. The master sends a timing code to the slave with transmission bursts. Once the slave receives a complete burst, it turns on its transmitter and transmits its burst. This scheme provides a fullduplex, radio-to-radio communication that follows a Ping-Pong analogy.

Rev. B - 2/97

1-3

AirLink Pro 64S Installer’s Guide Product Description

Figure 1-2

Point-to-Point Application Showing Master/Slave Configuration

In a point-to-multipoint setup, the Pro 64S modems provide a radio link between a host computer and two or more remote terminals. The terminals are controlled by the host with a poll-select communication protocol that is transparent to the AirLink modems. In this case, polling is the process of addressing the remote terminals by the host computer’s software. The master modem is the burst-timing synchronizer of the radio link. The master sends a timing code to the slave with transmission bursts. The slave synchronizes to this timing reference and sends transmission bursts back. This scheme provides a full-duplex, point-to-point session within a point-to-multipoint application. As shown in Figure 1-3, the host computer can poll one terminal via the AirLinks while transferring data to another.

1-4

Figure 1-3

Point-to-Multipoint Application

Rev. B - 2/97

AirLink Pro 64S Antenna

The antenna choices can include an 8 dBi Omnidirectional antenna or a 24 dBi semi-parabolic Directional antenna. Refer to the AirLink Site Planning Guide for different antenna options.

Network Management Ports

The AirLink Pro 64S ASCII terminal user interface is an RS-232 interface that allows a terminal device or personal computer to control and monitor AirLink Pro 64S operation at either end of the link. The connection to the RS-232 interface can be either a direct connection (device to port), or an indirect connection (device to modem to port).

Programmed Configuration Parameters

The AirLink Pro 64S operation is governed by user-selectable configuration and control parameters that reside in the non-volatile memory of the unit. These parameters are displayed and controlled through a terminal device that can access both the local and remote unit. When power is lost and then restored, the system reconfigures itself from its protected configuration database.

AirLink Pro 64S Installer’s Guide

Product Description

Refer to Chapter 3, Configuration, for more information on changing configuration parameter settings.

A long-life lithium battery protects all system configuration settings during power losses. The battery is integrated into the non-volatile memory /realtime clock circuitry on the digital module in the AirLink Pro 64S. It has a 10year storage life (in the absence of Power to the AirLink Pro 64S). However, a battery about to expire will result in loss of all configured parameters and revert back to the default configurations.

WARNING The component containing the lithium battery is NOT a customer-replaceable part. Do not

expose the lithium battery cell by opening the component. Do not attempt to recharge the battery. Do not dispose of the component by fire. The lithium battery could explode if mistreated.

Monitoring and Diagnostic Capabilities

The AirLink Pro 64S system constantly monitors the quality of the wireless link, checking the receive RFD signal level, bit errors, and many other critical factors. This information goes into an internal database of status and performance information that the AirLink Pro 64S uses, in part, to derive the

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AirLink Pro 64S Installer’s Guide Product Description

events that are stored in the event queue. As alarm events occur, they are signaled through indicators on the front panel of the modem and are entered in the event queue.

Using the terminal user interface, you can query either the local unit or the remote unit for status, performance and alarm information, and make configuration changes for either the local or remote end of the link.

The AirLink Pro 64S also provides built-in bit error testing and loopback tests that may be used to isolate problems. You can initiate tests in the local unit or in the remote unit through the terminal user interface.

Refer to Chapter 4, Operations and Maintenance, for information on monitoring operation and using diagnostic tools and procedures.

AirLink Pro/AirLink One Compatibility

AirLink Pro 64S modems are designed to operate in the same environments as AirLink One modems. They are compatible in the sense that adjacent links emanating from a Hub Site can be implemented using different generations of AirLink modems. However, due to different burst structures in the TDD overthe-air protocol, an AirLink Pro 64S modem cannot communicate in the same link with an AirLink One 64S modem.

There are compatibility issues to consider when AirLink Pro 64S and AirLink One modems are configured together to avoid mutual interference.

❚ Burst Synchronization ❚ Radio Frequency Environment

The considerations necessary for Burst Synchronization are discussed in Chapter 2, Installation and System Administration in the Burst Synchronization Section.

The AirLink Pro 64S has two commands, RF Plan and Range, that must be configured for AirLink One compatibility. These commands are discussed in Chapter 3, Configuration in the Configuring the RF Link section.

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HAPTER

Installation

This chapter outlines general planning and the procedures for unpacking, and installing the AirLink Pro 64S hardware, connecting cables, and performing power-up checks. This chapter also contains important instructions regarding safety in setting up the AirLink Pro 64S system.

Inside this chapter:

Overview .................................................................................2-2

Unpacking ...............................................................................2-2

Identifying Physical Features ............................................2-3

Site Preparation...................................................................2-5

Setting Up the System .......................................................2-6

Checking Operation ...........................................................2-28

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Overview

This chapter touches briefly on the general technical requirements of antenna and RF transmission line installation, but mainly focuses on the task of installing the AirLink Pro 64S system at each end of the communication link, integrating all of the equipment, and performing a system check and alignment before turning the system over to normal customer traffic.

A typical AirLink Pro 64S system is made up of the following components:

❚ AirLink Pro 64S ❚ antenna ❚ optional system components

Depending upon your system plan, you will be installing all or some of these AirLink Pro 64S system components at each end of a link. The following sections describe both required and optional system components.

Unpacking

The first step in the installation process is to take all of the materials out of the shipping carton(s) and make sure that you have everything shown on the packing list(s). If something is missing, contact your local distributor. Inspect the unit for any possible damage. If you discover shipping damage, repack the unit and notify the shipping representative.

NOTE Save the shipping cartons and packing materials. You will need the carton and materials if

you ever need to ship your equipment elsewhere.

After unpacking and confirming the contents of the shipment, place the AirLink Pro 64S system components on a flat surface that allows enough space to work around them.

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Identifying Physical Features

Figure 2-1

AirLink Pro 64S Front Panel

AirLink Pro 64S Installer’s Guide

Installation and System Administration

Front Panel

The AirLink Pro 64S front panel (Figure 2-1) consists of a metal panel that contains two clusters of indicators identified with graphical icons and labels. The two clusters have four indicators each. Table 2-1 lists the front panel LEDs and describes their functions.

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Table 2-1

AirLink Pro 64S Front Panel Indicators

Name Color Function

DCD Green When ON, indicates that a good data communications

RTS Green Indicates that RTS is asserted internally or externally. TD Green Indicates that the unit is transmitting data (in the form

RD Green Indicates that the unit is receiving data (in the form of

Major Alarm Red When ON, indicates that one or more of the following

Minor Alarm Yellow When ON, indicates that one or more of the following

Burst Sync Green When ON, indicates that the unit is the burst sync

Power Green Indicates that primary power is supplied to the

channel has been established

of ones) to the far-end unit.

ones) from the far-end unit.

events has occurred:

-Transmit Power Below Threshold

- DTE Interface Voltage Error

- Radio Sync Loss

- System Reset

- No Burst Sync Source

events has occurred:

- RSSI Below Threshold

- VSWR Above Threshold

- RSQ Below Threshold

- Primary Burst Sync Source Loss

- Backup Burst Sync Source Loss

- 1-HR Errored Seconds Threshold Exceeded

- 1-HR Unavailable Seconds Threshold Exceeded

- 24-HR Errored Seconds Threshold Exceeded

- 24-HR Unavailable Seconds Threshold Exceeded

source.

equipment.

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Rear Panel

The AirLink Pro 64S rear panel (Figure 2-2) consists of a metal panel containing two external equipment connectors, one terminal block, an AC power connector and an N-type antenna connector. Table 2-1 lists the rear-panel connectors and describes their functions.

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Figure 2-2

AirLink Pro 64S Rear Panel

Table 2-2

AirLink Pro 64S Rear Panel Connectors

Connector Type Function

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Power 5-pin DIN female Power connection. Antenna N-type female Antenna connection Network Management

Ports DTE DB 25 female for

Burst Sync 6-Pin Captive Wire

Site Preparation

Because of the special planning requirements associated with installing a microwave system, you should review some of the general guidelines regarding installation preparation to ensure that the site you are considering is suitable to the purpose. For details on Site Planning, refer to the AirLink Site Planning Guide.

General Physical and Environmental Characteristics

DB 9 male connectors

RS-232 interface DB 25 female for

V.35 and EIA-530

Terminal

For connecting a modem or terminal to the AirLink Pro 64S.

DTE connection (Note: These are DCE emulating ports.)

Burst Sync Connection

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The AirLink Pro 64S radio unit measures 8.3 inches wide (21.083cm), 2.6 inches high (6.60cm), and 10 inches deep (25.4cm), and weighs approximately 5 pounds (2.3 kilograms).

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Lightning Protection

If the AirLink Pro 64S system is being installed in an area where lightning is a problem, primary protection, such as gas tubes or spark gaps, is required (Cylink distributors can provide these). For more details on lightning protection refer to the AirLink Site Planning Guide.

Power Requirements

The AirLink Pro 64S Power Specifications are listed in the table below.

Table 2-3

Voltage Requirements

Parameter Specifications

External AC power Supply Input Output

100-250 VAC @ 50/60 Hz +5, +/- 12 VDC, cable terminated with 5-pin

male DIN Connector

Maximum Power consumption (Power Supply plus AirLink)

NOTE Power supplies are available as options from Cylink and distributors.

AC Power Supply - 23W DC Power Supply - 21W

Setting Up the System

The following sections outline the procedures for installing, cabling, and bringing up an AirLink Pro 64S system. Some of the steps require special knowledge, experience, and tools; some of the installation steps may require help from another person.

Installing the Antenna

Antennas are generally installed by persons who have the knowledge, experience, and tools to handle the somewhat specialized task. The following sections are intended as a general summary of the process, and not as a complete description. A successful antenna installation effort is the culmination of site and route preparation and path analysis. For a detailed description of Path Analysis and antenna options refer to the AirLink Site Planning Guide .

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Typical Antenna Mounts

An antenna for a microwave system such as the AirLink Pro 64S is typically equipped with mounting hardware that allows the antenna to be attached to a length of pipe (or stub mast) that can then be mounted in several ways, depending upon user requirements, site conditions, and local building codes (see Figure 2-3).

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Figure 2-3

Typical Antenna Mounts

System Grounding

Direct grounding of the antenna, mast, and tower provides some protection against lightning strikes and static buildup. A direct electrical connection should be made to a suitable grounding rod at the base of the tower or mast using

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at least one-inch wide copper grounding strap, or its equivalent, and noncorrosive hardware. For details and safety standards, consult the appropriate electrical code or a similar document. Use lightning arrestors in appropriate places.

Aligning the Antenna

In order for an AirLink Pro 64 pair to operate correctly, the local antenna and the remote antenna must be aligned so that the signals from one antenna are aimed directly at the center of the other antenna. Correct antenna alignment maximizes the signal received at both ends of the radio link. The antenna alignment procedure is outlined at the end of this chapter.

WARNING The AirLink Pro 64S should be grounded before any other connections are made to it. This

includes power, DTE, and Network Management port connections.

Installing the AirLink Pro 64S

Connecting the Antenna Cable

To connect the antenna cable to the AirLink Pro 64S:

1. Locate the N-type connector on the rear panel of the AirLink Pro 64S (see Figure 2-2).

2. Plug the RF cable connector firmly into the N-type jack connector and handtighten the cable connector shell onto the jack connector collar.

3. Verify that the cable connector is seated securely and that the cable is not kinked.

DTE Line Connection

1. The AirLink Pro 64S supports RS-232, EIA-530, and V.35/V.11 interfaces. Two separate DB 25 female connectors are provided on the rear panel for the three interfaces.

NOTE Cable/connectors are available from Cylink and Cylink distributors.

2. Locate the DTE connectors on the AirLink Pro 64S rear panel (see Figure 2-2) and use a shielded cable to secure the hold-down hardware.

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3. Ensure that the cable is securely held by the connector.

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Connecting the Power

The AirLink uses an external power supply that is provided with the modem.

1. Locate the power connector on the rear panel of the modem.

2. Plug the 5-pin DIN connector of the power supply cable into the modem.

3. Plug the AC power cord into the power supply and then into the grounded electrical outlet.

WARNING To avoid the danger of electrical shock or power loss, ensure that the power cord is

securely seated in the receptacle on the modem. This equipment is designed to work with electrically grounded systems. The product’s AC power cord ends in a three-pole grounding plug. Do not use a three-pole to two-pole adapter with the plug. Verify that the outlet you intend to use is properly installed and grounded; the outlet used must comply with the local electrical code for the country it is installed in. To ensure your safety, only connect the power cable to a properly grounded outlet.

Network Management (Terminal Connection)

On the rear panel of the AirLink Pro 64S are two Network Management ports (DB 9 male). Modems can be connected via Network Management port #1 and a simple ASCII terminal or personal computer can be connected via port #2 to monitor and configure the AirLinks operation.

Figure 2-4

Terminal Connection to the AirLink Pro 64S

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NOTE The Network Management ports are “wired” as DTE (Data Terminal Equipment). This

allows for a standard “straight through” cable connection for any modem (modems are wired as DCE Data Communications Equipment). Since the terminal or PC and the Network Management ports are “wired” as DTE, the user must supply a “null modem” cable when connecting a PC or a terminal to the AirLink Pro 64S.

Terminal Setup Requirements (ASCII Terminal)

The following information describes the simple steps neccessary to configure a terminal in order to perform antenna alignments. Further information on terminal usuage for setting each link parameter will be discussed in later in this Chapter.

Before connecting the ASCII terminal to the unit, configure the terminal with the following parameters:

Terminal Mode = VT100 Column = 80 Autowrap = ON Monitor Mode = OFF Cursor Keys = Normal Newline Mode = ON Character Set = DEC Supplemental Key Code = ASCII Break key = ON Minimum Break Length = 2 character times (17 msec.) Data/Parity = 8/No Parity Stop Bits = 1 Transmit Rate = 19200, 9600, 4800, 2400, or 1200 bps Auto Answerback = OFF Comm = FDX (No Echo) RS232 Data Leads Local Echo = OFF

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To connect the terminal, follow these steps:

1. Connect the terminal (or a computer in terminal emulation mode) to the Network management port as described in Chapter 2.

2. Turn on the terminal; adjust contrast and brightness as required.

The AirLink Pro 64S terminal interface software contains an autobaud feature that automatically attempts to detect the operating baud rate of the attached terminal device.

3. Press <Break> then <Return> on the terminal keyboard.

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Pressing <Break> at the terminal puts the AirLink Pro 64S terminal interface software in “hunt” mode, where it looks for carriage return (<Return>) characters from the attached terminal. If the terminal is set for 19200, 9600, 4800, 2400, or 1200 bps, the terminal interface software learns the operating baud rate by starting at 19200 bps and dropping to the next lower speed in the sequence for each press of the <RETURN> key until it recognizes a <Return> character. When the software detects a <Return> character, it displays the AirLink Pro command-line prompt:

AIRLINK PRO 64S>

NOTE Lap top computers do not support the break function.

Pressing <Break> puts the terminal interface software back into hunt mode. If the prompt does not appear, press <Break>once, then press <Return> repeatedly at one second intervals until the AirLink Pro 64S prompt appears. If the prompt doesn’t appear after pressing <Return> six times, press <Break> and try again.

AirLink Pro 64S Installer’s Guide

Terminal Setup Requirements (for personel computers with Windows™)

A personal or laptop computer can be used as a dummy terminal to configure, status, and acquire information from the AirLink Pro 64S radio. The serial communication port (com1 or com2) of the computer must be connected to either of the two Network Management Ports on the rear panel of the unit. There are other communication software packages like Procomm™ that can be used to emulate a dummy terminal. The instructions given below are a guide to using the Microsoft Windows terminal emulation software.

Using the mouse buttons double click on the ACCESSORIES icon under the Program Manager of Windows. Double click on the TERMINAL icon. Pull down the menu under Settings near the top of the screen, and single click on Terminal

Emulation. Select DEC VT-100 [ANSI] (see Figure 2-4 ) then single click on OK.

Figure 2-5

Terminal Emulation

Now go back to settings and single click on Terminal Preferences, and set up the terminal parameter as follows:

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Figure 2-6

Terminal Preferences

Single click on OK to enter any changes made to these settings or click on Cancel to exit without change. While remaining under Settings, select Communications and set up the serial port as follows:

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Figure 2-7

Communications

This software works best at data rates of 4800 baud or lower. To change the baud rate hold down the Control and Break key simultaneously for 10 seconds. This will send a command to the AirLink Pro 64S radio to search through and match the baud rate of interface with the baud rate of the terminal.

Configuration of the Serial Communication Port

Go to the Program Manager in Windows by typing “WIN” at the C: >\ prompt. Single click on the MAIN icon, then single click on the CONTROL PANEL icon which shows the normal or default settings for the mouse, keyboard, and serial communication ports. Double click on the PORT icon, then select the communication port number that will be displayed (See Figure 2-7).

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Figure 2-8

Ports

For example: Single click on COM1 (communications port 1), then click on Settings. The current settings of baud rate, data bits, parity, stop bits, and flow

control are displayed for com1.

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Figure 2-9

Settings for Com1

A single click on ADVANCED will display the advanced settings of the communication port which are Base I/O Port Address and IRQ Line (Interrupt setting).

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Figure 2-10

Advanced Settings for Com1

For most applications the default settings for both the COM1 and COM2 are as follows.

Serial Port Base address Interrupt Request Line (IRQ) COM1 0X3F8 4 COM2 0X2F8 3 Single click on OK to enter any changes made to these settings or click on Cancel

to exit without change. Usually these settings are not changed unless changes are made to the system,

such as the addition of a high speed I/O card or internal modem. When the computer is running an application software it is very important that all the interfaces and communication ports be set up correctly. If a laptop or a personal computer does not have a mouse you can choose or select specific settings within each menu by pressing the tab key repetitively to move through each option. Pressing <TAB> + < CURSOR> keys will allow you to step through each option and make changes as required.

A terminal device or a personal computer may have specific data cabling requirements (refer to Appendix B, Specifications, for connector pin assignments), and usually requires a grounded alternating current power outlet. In a hub installation involving a number of AirLink Pro 64S pairs, the terminal device can be “shared” across all the AirLink Pro 64S systems by using a terminal switching device.

Remote Modem Connection

A remote terminal or personal computer can be connected to Network Management Port #1 on the rear panel of the AirLink Pro 64S unit through a modem (see Figure 2-11). A modem typically requires a dedicated telephone line with a modular RJ-11 jack as well as a source of power, usually a standard 115 VAC or 230 VAC grounded outlet.

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NOTE AirLink power cords are available to match the power outlets in most countries.

NOTE To avoid ground loops, use the same power outlet for the AirLink Pro 64S and any auxiliary

equipment, like a terminal or computer.

Figure 2-11

Modem Connection to the AirLink Pro 64S

Batch File Handling

The user can configure the unit by executing commands through a batch file. The user needs a Windows terminal emulator or a serial communications package such as Procomm. The batch file can be used to execute local SET commands only (user cannot issue remote commands via a batch file). It is important that the user verify the proper execution of GET and SET commands manually before executing the batch file. This indicates that the unit is functional.

Procomm:

1. Power up the unit. Log in and verify that the GET and SET commands work.

2. Choose Alt-S option in order to select the upload parameters.

3. Select option # 4...delay between characters...suggested value: 25.

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4. Select option # 5...delay between lines...suggested value: 100 (Esc gets you out of the setup menu).

5. Press the PageUp key to bring up a menu that gives you several options.

6. Choose Option 6 (ASCII Upload). Procomm prompts you for the filename.

7. Enter the name of the batch file holding the configuration commands.

NOTE Procomm Plus software does not work with the AirLink Pro 64S at this time.

Windows Terminal Emulator:

1. Power up the unit and wait for the POST messages.

2. Login and verify that the GET and SET commands work.

3. From the Setting menu, select the Text Transfer option.

4. Set the following parameters: Delay between characters : 1/10 sec Delay between lines : 25/10 sec

5. From the Transfer menu select Send Text File. Enter the name of the text file that contains the configuration commands.

NOTE The delay between character values are dependant upon the speed of your PC.

You should see each command being executed on the local unit. The command will be followed by the unit’s response based on whether the command was executed. If the terminal program sends a command to the local unit before the local unit is ready for the next command, the command may be dropped.

Burst Synchronization

When you have either a hub configuration or a repeater site (more than one AirLink unit operating from the same central site), one of the units must be set up as the source for burst synchronization. Refer to Chapter 3, Configuration, for Hub and Repeater settings.

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Burst Sync Signal Description

The Burst Synchronization signal is used by AirLink Modems in Hub and Repeater applications to synchronize two or more modems to a common reference. Two types of synchronization are required: transmit burst and bit timing synchronization. These two components are necessary to align the transmit bursts, and to ensure that an exact number of user data bits are generated every 8.5 millisecond Time-Division-Duplex (TDD) frame. If this were not the case, data would be lost when the internal buffers overflowed.

The TDD over-the-air protocol used in AirLink modems is characterized by a transmit burst followed by a receive burst, in an 8.5 millisecond frame. In order to minimize interference between adjacent links, it is necessary to ensure that all of the transmit bursts emanating from the hub site occur simultaneously. This is accomplished by providing a bussed burst synchronization signal (see Figure 2-12) to all modems at the hub site. The signal has a complex structure that has two components. The first component is characterized by wide pulses, which occur at 8.5 millisecond intervals. They are used by the AirLink modems to trigger the transmit bursts and ensure the necessary time alignment. The second component is characterized by short pulses, which occur at an 8 kHz frequency. The pulses serve as phase reference for the AirLink modem internal oscillator, which ensures bit timing synchronization between the modems.

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Figure 2-12

Burst Synchronization Structure

Time-Division-Duplex (TDD) Burst Structure Description

The TDD over-the-air protocol used by the AirLink Pro 64S modem is designed to provide the transport mechanism for the full-duplex user data, as well as a separate communication channel for the remote command and status capability (see Figure 2-13). The burst structure is shown in the figure below. This figure

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depicts the format of a single burst, however two such bursts, a transmit and a receive burst, are required to form a complete TDD frame. Each burst is approximately 4 milliseconds long, which is about 40% of the TDD frame time. The two bursts together take up 80% of the frame time, and the unused 20% is called the guard time, which is necessary to allow for the two-way propagation delay between the two modems that form a link.

The burst is shown to be composed of five components. The Preamble (PA) is the first part of the burst. It is necessary to allow the receiving modem circuitry to re-acquire synchronization to the transmitting modem. The receiver must reacquire sync for each burst since it will drift in frequency slightly during the time that no signal is present. The second component is the Unique Word (UW). This is a unique bit pattern that is used by the transmitter to mark the start of the payload data to the receiver. Once the receiver detects this pattern, it can immediately begin recovering the remaining three components. The third component is the inter-processor communication channel (COMM). This channel provides a 1 kbps full duplex communication link between the embedded microprocessors in the AirLink Pro modems. The channel is used to communicate commands and to request and receive status information over the RF link. The fourth component is the data payload (DATA), which provides a maximum 64 kbps full duplex communication channel for the user’s data. The user’s data is carried unmodified in this burst structure, making the AirLink modem’s DTE interface protocol-independent. Finally, the fifth component is the CyclicRedundancy Check error detection code. This 16-bit code is computed on the transmit side, and checked on the receive side, once for every burst. When block errors are detected they are counted, and are reported by the microprocessor.

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Figure 2-13

TDD Burst Structure

AirLink Pro 64S Installer’s Guide Installation and System Administration

Installing Burst Sync Wiring

Burst synchronization minimizes near-end inter-channel interference among the units in a hub configuration; all the hub units are synchronized in order to transmit and receive at the same time. The burst synchronization system is implemented with a dual external bus. Each bus consists of a differential pair of wires, driven by a tri-stateable RS-485-type device. When multiple modems are to be synchronized, they should be interconnected via a color coded fourwire cable. Each modem has six jacks that are electrically identical to facilitate this interconnection.

The equipment should be physically located as shown in Figure 2-14. The Reference and backup masters should be the first units in the chain. Figure 2-14 illustrates the connections needed for Burst synchronization at a hub site where the A bus is used. The Reference master is the burst sync signal source, providing it for the three Subordinate master units. If the distance between the Reference master and the last Subordinate master is greater than 100 ft, the burst sync bus(es) should be terminated at the last subordinate master. The termination is done with a 100 ohm resistor (internal to AirLink) as shown in Figure 2-15. You should ensure that that the Termination is at one end of the daisy chain and the Burst sync source is at the opposite end. Care should also be taken not to use multiple terminations.

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Figure 2-14

Burst Sync Wiring

Burst Sync Fail-Safe Feature

The AirLink Pro provides for a burst synchronization backup scheme which uses two buses. These are referred to as the "A" bus and the "B" bus. Use of the backup burst synchronization bus is optional. To use the backup feature, one of the two buses is designated as the primary burst synchronization bus and the other is designated as the backup burst synchronization bus. One of the units at a hub site is selected as the "Reference Master", and a second unit is selected as

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the "Backup Master." All other units at the hub are designated as "Subordinate Master." The burst synchronization signal on the primary bus is provided by the Reference Master unit. When activity is lost on the primary bus, implying that the Reference Master has failed to provide the burst synchronization signal, the modems will use the backup burst synchronization signal provided by the Backup Master unit. When activity is again detected on the primary bus, the burst synchronization signal on this bus is used.

Figure 2-15

Burst Sync Backup

The Burst Sync LED is ON for the unit providing the burst synchronization signal; this will always be either the Reference Master or the Backup Master. Subordinate Master units never provide the burst synchronization signal.

The AirLink Pro modem unit monitors for loss of the burst synchronization signal. When only a single burst synchronization bus is used, the loss of the burst synchronization signal triggers a Major Alarm. The Major Alarm LED is turned ON, and an alarm message is generated in the event log. When both burst synchronization buses are being used, and both primary and backup burst synchronization signals are lost, a Major Alarm is generated. The Major Alarm LED is turned ON, and an alarm message is generated in the event log. If either the primary or backup burst synchronization signal is lost, a Minor Alarm is generated. The Minor Alarm LED is turned ON, and an alarm message is generated in the event log.

To configure all the units at a primary hub site to use the primary burst synchronization bus only, follow these steps:

1. Designate one unit to be the Reference Master unit. Type

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AIRLINK PRO 64S > set application 4

2. Designate all the other units to be Subordinate Master units. For each unit, type

AIRLINK PRO 64S> set application 6

3. To designate a single burst sync system, at each unit in the hub, type

AIRLINK PRO 64S > SET HUB_SYNC SINGLE

4. Wire the units as shown in Figure 2-14.

To configure all the units at a primary hub site to use the backup burst synchronization feature, follow these steps:

1. Designate one unit to be the Reference Master unit. For this unit, type

AIRLINK PRO 64S > Set Application 4

2. Designate a second unit to be the Backup Reference Master unit. For this unit, type

AIRLINK PRO 64S > Set Application 5

3. Designate all the other units to be Subordinate Master units. For each unit, type

AIRLINK PRO 64S > Set Application 6

4. To designate a dual burst sync system, at each unit in the hub, type

AIRLINK PRO 64S> SET HUB_SYNC DUAL

5. Wire the units as shown in Figure 2-15.

To configure units in a secondary hub site, all the above steps apply except that either a Slave modem in a point-to-point link or a Slave modem in a point-tomultipoint link is used in place of the Reference Master unit.

Normal Operation of Backup Burst Synchronization

The Backup Burst synchronization scheme is used in hub and repeater configurations. The burst synchronization signal is provided on two buses, Bus A and Bus B. The primary burst sync signal is provided by the Reference Master unit on Bus A. The Backup Burst Synchronization signal is provided by the Backup Master unit on Bus B.

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Table 2-4

Normal Burst Sync Activity

Source Reaction

Reference Master Provides burst sync signal on Bus A

Uses own burst sync signal Burst Sync Source LED is ON

Backup Master Provides burst sync signal on Bus B

Uses burst sync signal from Bus A Burst Sync Source LED is OFF

Subordinate Master(s) Uses burst sync signal on Bus A

Burst Sync Source LED is OFF

Activity Lost on Bus A Only

This condition occurs if the Reference Master unit malfunctions or the burst sync connection on Bus A is broken. It is detected by all units at the hub except for the Reference Master unit. The Reference Master unit cannot monitor its own burst sync status. The technician should power down the Reference Master Unit or remotely enable its “RF Sleep” command, until the problem is located. It may still be transmitting and can cause near-end inter-channel interference since all other units are using a different burst sync signal.

Table 2-5

Bus A Activity Lost

Source Reaction

Reference Master Uses own burst sync signal

Burst Sync Source LED is ON

Backup Master Provides burst sync signal on Bus B

Uses own burst sync signal Burst Sync Source LED is ON Minor Alarm LED is ON Event Queue contains “Primary Burst Sync Source Loss” message

Subordinate Master(s) Uses burst sync signal on Bus B

Burst Sync Source LED is OFF Minor Alarm LED is ON Event Queue contains “Primary Burst Sync source loss” message

Activity Lost on Bus B Only

This condition occurs if the Backup Master unit malfunctions or the burst sync connection on Bus B is broken. It is detected by all units at the hub except for the Backup Master unit. The Backup Master unit cannot monitor its own burst sync status.

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Table 2-6

Bus B Activity Lost

Source Reaction

Reference Master Provides burst sync signal on Bus A

Backup Master Uses burst sync signal on Bus A

Subordinate Master(s) Uses burst sync signal on Bus A

Activity Lost on Bus A and Bus B Table 2-7

Bus A and Bus B Activity Lost

Uses own burst sync signal Burst Sync Source LED is ON Minor Alarm LED is ON

Burst Sync Source LED is OFF

Burst Sync Source LED is OFF Minor Alarm LED is ON Event Queue contains “Backup Burst Sync Source Loss” message

Source Reaction

Reference Master Uses own burst sync signal

Burst Sync Source LED in ON Minor Alarm LED is ON Event Queue contains “Backup Burst Sync Source Loss” message

Backup Master Uses own burst sync signal

Burst Sync Source LED is ON Minor Alarm LED is ON Event Queue contains “Primary Burst Sync Source Loss” message

Subordinate Master(s) Burst Sync Source LED is OFF

Major Alarm LED is ON Event Queue contains “No Burst Sync Source” message

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Burst Synchronization Compatibility with AirLink One Modems

The AirLink Pro 64S uses a burst synchronization signal that is compatible with the signal used in the AirLink One S-band 64kbps, 128kbps, and 256kbps models and AirLink One L-band models. A hub configuration may contain both AirLink Pro and AirLink One units. AirLink One units, however, cannot take advantage of the backup burst synchronization feature. For the burst synchronization signal, the AirLink One models use a different connector and cable than those used on the AirLink Pro 64S. The following section describes the procedure to successfully connect AirLink Pro and AirLink One units for burst synchronization in a hub configuration. You will need an RS232 DB25 (Female) to BNC (Male) converter, RS232 DB25 (Male) to RS422 terminal block converter (see Figure 2-

14) and a pair of single wires (converters can be ordered from Cylink distributors).

The RS232 and RS422 terminal block converter, Telebyte Model number 285M, must be properly configured before use. A two position switch accessible from the top of the unit should be set to the “DCE” position. Also, the five position dip switch next to the terminal block should have the following settings: SW1 through SW4 open, and SW5 closed.

Figure 2-16

Burst Sync Compatibility (AirLink One unit providing Burst Sync)

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AirLink One Unit Providing Burst Synchronization Signal

1. Connect the BNC cable marked “SEND” of the RS232-to-BNC converter to the "SYNC" connector of the AirLink One.

2. Connect the DB25 female end of the RS232-to-BNC converter to the DB25 male end of the RS232-to-RS422 converter.

NOTE The cable and connectors are available for purchase from Cylink or Cylink distributors.

On the terminal block end of the RS232 to RS422 converter, there are provisions for two pairs of wires. One pair is used when the AirLink One unit is generating the burst synchronization signal to the other units in the hub. The other pair is used when an AirLink Pro unit is providing the burst synchronization signal (See the next section).

3. Connect one end of a single wire to the designated "T+" terminal of the

terminal block and the other end to the AirLink Pro unit's "+A" terminal. Connect one end of a second single wire to the designated "T-" terminal of the terminal block and the other end to the AirLink Pro unit's "-A" terminal.

AirLink Pro Unit Providing Burst Synchronization Signal

1. Connect the BNC cable marked "RECEIVE" of the RS232-to-BNC converter to the "SYNC" connector of the AirLink One.

2. Connect the DB25 female end of the RS232-to-BNC converter to the DB25 male end of the RS232-to-RS422 converter.

3. Connect one end of a single wire to the designated "R+" terminal of the terminal block and the other end to the AirLink Pro unit's "+A" terminal. Connect one end of a second single wire to the designated "R-" terminal of the terminal block and the other end to the AirLink Pro unit's "-A" terminal (see Figure 2-15).

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Figure 2-17

Burst Sync Compatibility (AirLink Pro unit providing Burst Sync)

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Checking Operation

At start-up an AirLink Pro 64S pair will attempt to:

❚ establish the radio link between the two radio units, and ❚ begin transferring data

When each radio unit is powered up, it performs a power-on self-test that determines whether the unit’s hardware and software are operating within the required limits. When the test succeeds, the designated master unit begins transmitting, in an attempt at establishing an RF link with the slave unit.

Power-up LED Sequence

The boot-up process consists of the unit performing several self-tests (described below). All LEDs will light at one time or another, so this is a visual check that they are all working. The boot-up time, defined as the time for the unit to complete the boot-up process, is 15 seconds.

All the LEDs light up when Xilinx is loaded successfully.

Table 2-8

LED Indicators

Indicator Signifies

RD EPROM Checksum TD Xilinx EPROM Checksum RTS LED NVRAM DCD Configuration databases are

checked

Hardware initialization Power LED Power is on Burst Sync Source Boot up is successful Minor Alarm LED RAM test in progress Major Alarm LED Xilinx loading in progress

If a unit is powered up with the factory default configuration, the following LEDs are ON when the unit successfully completes the boot-up process: Power,

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Burst Sync Source, RD and TD. A few seconds later, the Major Alarm LED comes ON, followed by the Minor Alarm LED.

Error Codes

When an error code is detected, a message is entered into the AirLink Pro 64S Error Code Queue. If the RAM Test fails then the Minor Alarm LED stops flashing and the Burst Sync LED lights up. If Xilinx loading fails, the Major Alarm LED remains lit while the other LEDs are off. If the EPROM Checksum test, the Xilinx EPROM test or the NVRAM test fails, then the corresponding LED remains lit. Refer to Table 2-7 for Error Code Definitions. In such situations you are advised to call your local distributor or Cylink Customer Support.

Table 2-9

Error Codes

Message Description

Minor Alarm LED is OFF Burst Sync LED is ON

Major Alarm LED is ON Xilinx loading failed. RD LED is ON EPROM checksum test failed. TD LED is ON Xilink EPROM test failed. RTS LED is ON NVRAM test failed.

CAUTION The AirLink Pro 64S is not field repairable! Attempting to replace components will

automatically void the warranty. For out of warranty situations this usually increases the cost of repair significantly.

RAM test failed.

Initial Unit Configuration

Because all AirLink Pro 64S units leave the factory configured as slave units in a point-to-point configuration, be sure to configure one of the units as a master.

In a new point-to-point link installation, the configuration on one end must be Master Unit in a Point-to-Point Link.

In a new hub installation, the units at the hub must all be masters, and the corresponding remote units must be slaves. At a hub, set up each individual link first as a point-to-point link and then align each link separately with all the other AirLink Pro 64S units turned off. After all the link pairs have been

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configured and aligned as point-to-point links, you can then change configurations for hub operation.

In a new repeater installation, treat each link segment as a point-to-point link, progressing from the near-end to the far-end sites. After all the link pairs have been configured and aligned as point-to-point links, you can then change configuration for repeater operation.

Each type of application has been assigned a specific number for configuration purposes. For more information about Applications and Burst Synchronization, refer to “Application” in the ‘Setting Link Parameters’ section of Chapter 3, Configuration.

Because there is no radio link until the AirLink Pro 64S pairs have been configured and the antennas aligned, all system configuration must be done individually at each unit. Once there is a radio link between the units of an AirLink Pro 64S pair, the remote unit can be configured from the local site across the radio link.

To configure one end of the link as a master:

1. Connect a terminal to the Terminal port on one of the two AirLink modems .

The terminal must be set up to operate according to the attributes described in “ Terminal Connection,” earlier in this chapter.

2. Type the following command at the prompt:

AIRLINK PRO 64S> set application 2

The text you type is shown in boldfaced type; be sure to include spaces as shown.

3. To verify the configuration change, type the following command at the prompt:

AIRLINK PRO 64S> get configuration

The terminal displays the configuration of the unit, similar to the following:

AIRLINK PRO 64S> Get Configuration Site Name: Application: 2. Master Unit in a Point-to-Point Link PN Code: 1 RF Channel Plan: 20 channels RF Channel: 1 RF Frequency: 2404.468

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RF Power: 0 dBm RF sleep: NO Comm Mode: Synchronous Data Rate: 64 Kbps Burst Timing: Free Run Tx Clock Source: Internal Tx VCXO Reference Free Run Hub Sync: Single RTS Source: Internal RTS delay: 0 msec DTE mode: RS-232 DTE Protect: Disabled Alarm Reporting: immediate Alarm Level: Status Date/Time: 10 Sept 1996 10:35:00

NOTE Depending upon your AirLink Pro 64S installation, you may need to alter more

configuration values in order to ensure correct operation. Refer to Chapter 3 for more information on configuring the AirLink Pro 64S.

Aligning the Antenna

After the link pair has been turned on and configured, the antennas must be aligned. Because most AirLink Pro 64S paths will be line-of-sight paths, the initial antenna alignment can be done visually. In most cases, this rough alignment will be sufficient to allow the radio units to acquire radio synchronization lock. To “fine tune” the antenna alignment, perform the following procedure:

1. Insert the probes of a DC voltmeter into test points (the test points are on Pins 1 and 25 of the RS232 DTE interface connector) on the rear panel of AirLink Pro 64S .

2. Swing the antennas on both ends of the link horizontally and vertically (but not at the same time!) until the observed voltage peaks.

Swing the antennas through the main lobe and both side lobes to be sure that the antenna is aligned on the main lobe, not one of the side lobes.

After you align the antenna, use the terminal get status and get performance commands to check the receive signal quality (RSQ). You should be able to obtain an RSQ value of 7 or 8 or more. Compare the receive signal (RSSI) level as measured from the DC voltmeter to the expected signal level based on the path calculations. (For more information about the RSSI value, see page 3 of Chapter 4). See the table below for correspondence between

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measured voltages and receive signal quality (see Table 4-1 in Chapter 4 to view the Receive Signal Quality table).

Table 2-10

Signal Quality

Signal Quality RSSI Voltage Range

Good 8.5 - 10.0 V Bad < 6.0

3. Type the following command at the AirLink Pro 64S prompt:

AIRLINK PRO 64S> get status

The system displays a list of status information similar to the following:

AIRLINK PRO 64S> get status Site Name: Test in Progress: None DTE Status: RS-232 Radio Sync Loss: No Burst Sync Loss: No RSSI: -60.0 dBm RSQ: 9.0 VSWR N/A Date/Time: 10 Sept 1996 10:37:09

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4. Type the following command at the AirLink Pro 64S prompt:

AIRLINK PRO 64S> get performance

The system displays a list of status information similar to the following:

AIRLINK PRO 64S> get performance Site Name: Sunnyvale 2 QRSS BER: Unavailable 1HR ES: 1 1HR UAS: 1 24 HR ES: 2 24 HR UAS: 3 RSQ: 9.0 Date/Time: 10 Sept 1996 10:38:00

The Receive Signal Quality (RSQ) is a figure of merit that is normalized on a scale of 1 to 10, and is a function of the receive signal-to-noise and signal-tointerference ratio. A very strong signal that is severely corrupted with

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interference results in a normal receive signal level indication (RSSI) and a low RSQ number.

Assuming that the path to and from the AirLink Pro 64S unit is okay, the AirLink One is prepared to pass data. If you need to alter other configuration values, refer to Chapter 3, Configuration,

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HAPTER

Configuration

This chapter describes how to use the AirLink Pro 64S command line terminal user interface to set and change configuration parameters. The information in this chapter includes descriptions of all the AirLink Pro 64S configuration commands and options, and lists the default configuration settings.

Inside this chapter:

Overview .................................................................................3-2

Using the ASCII Terminal Interface .................................3-2

Setting Administrative Parameters ..............................3-10

Setting Link Parameters ..................................................3-12

Setting Alarm Control Parameters ..............................3-22

Setting Modem Parameters.............................................3-2?

Other Command Keywords and Operands....................3-2?

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Overview

You configure the AirLink Pro 64S by connecting an ASCII terminal or a personal computer to the Terminal port of the AirLink Pro 64S.

The AirLink Pro 64S ASCII terminal interface provides a command line interface that consists of a body of commands for manipulating the operation of the AirLink modem. This includes configuring operational parameters, monitoring operation, and responding to alarm conditions. The command line interface (CLI) also provides an on-line help facility to aid you in entering commands.

You can type a question mark (?) at the end of any command field, and the command interpreter will display the next valid keyword or operand that you can enter. If you press <Return> before the command is complete, the command interpreter displays the next valid keyword or operand that you can enter. If the command is complete, the system will execute the command. Keywords do not have to be fully typed out if enough letters are provided to eliminate ambiguity.

You can also type in a help request for a particular command combination, to see what comes next.

The command line interface is described in more detail in the following sections.

Using the ASCII Terminal Interface

Command Line Interface (CLI)

The command line interface consists of a body of commands for manipulating the operation of the AirLink Pro 64S, including configuring operational parameters, monitoring operation, and responding to alarm conditions.

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Command Line Interface Syntax

1. A command line consists of a basic command keyword. This basic command keyword must be the first word of the command. More specific keywords and operands follow this basic command keyword. For example:

AIRLINK PRO 64S> get RSSI

2. Each token (basic keyword, specific keyword, operand) must be separated from another with either an ASCII comma, ASCII space, or ASCII tab. More than one space may be used as extra spaces are ignored. Comma, space, and tab characters may never be used inside keywords or operands.

3. All operands relating to a command keyword must follow that key word in the prescribed order (always allow for a space between commands). Keywords relating to a different command keyword must follow that command keyword. However, if several keywords relate to the same command keyword, the ordering of those keywords does not matter.

4. Keywords do not have to be fully typed out if enough letters are provided to eliminate ambiguity. For example:

AIRLINK PRO 64S> set alar repo imme

instead of

AIRLINK PRO 64S> set alarm reporting immediately

5. Maximum command length is 250 characters, including comments, spaces, and carriage return. Any command that exceeds this is rejected with an appropriate error message.

6. Keywords may be entered in either lower case, upper case, or a combination of both.

Editing Capability

1. Network Management Ports 1 and 2 are Network Management and ASCII terminal ports. When they are in the command mode, the system will echo characters back to these ports.

2. Network Management 1 and 2 handle both Backspace and Delete key strokes from a VT100 terminal. When either key is entered, the function invoked is to blank out current cursor location and to move the cursor one character to the left. If the buffer is empty, no action is taken when either key is typed.

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3. When the escape key <Esc> is struck during the typing of a command line, all characters typed are deleted, and the system is then ready to accept another command.

4. When <Control> R is pressed, at the prompt, the previously issued command is displayed. This command can be edited by backspacing to delete characters from the end, and/or by augmenting the command with additional characters. This is particularly helpful when the user types an incomplete command; all the user needs to type is the remaining word(s).

5. A limited help facility is available for the command mode. In command line, the user may type a question mark ( ? ) at a position where a keyword should be entered. The Controller displays the available keywords along with their explanation. When the user types a question mark at a position where an operand should be entered, the Controller displays the available operands and their input range (for instance, 1 to 30, or Yes, No) along with the explanation of the operands. After printing the help text, the Controller reprints the command that the user typed without the question mark and gets ready for the user to type the next operand.

6. The same help facility described above is provided when the user enters a carriage return instead of a question mark before the end of a command. There is a difference in response between the termination with a carriage return and termination with a question mark. When a question mark is entered, the system always prints the help text for the next token. When a carriage return is entered, the help text is displayed only if the command is not properly terminated. Otherwise, the system treats it as a complete command and continues with execution.

Command and Operand Description Syntax

1. A description syntax is used to show operand ranges and keyword choices. This syntax is used for description purposes only and not for the command itself.

2. [ x1 | x2 | ... | xn] indicates that one of the elements in the set may be selected.

3. “ - “ ( a hyphen) indicates a range of numbers explicitly put into the command.

Command Keyword List

Command keywords and operands can be used to set or request configuration parameter values, or status information. For keywords longer than four letters, only the first four letters of each keyword are necessary and case is not checked (all strings are converted to upper case). White space characters are required between keywords but the

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Configuration

type (i.e. space or tab) and the number are not checked. Keywords in parentheses are optional; such words need not be typed for the command to execute. Refer to Appendix D for a complete list of keywords.

Power-Up Messages

Following power up, the system displays a series of successfully passed tests similar to the following:

Waiting for Xilinx Init Loading Xilinx Xilinx loaded OK! RAM test passed EPROM passed checksum test Xilinx EPROM passed checksum test NVRAM Test Passed Passed Database checksum test RTC Test: Passed Passed CFG DB Checksum test Event Queue test: Passed Initializing Xilinx registers CYLINK Corporation, Sunnyvale, CA 94086 AirLink Pro Software, Copyright (C) 1996

Logging into the System

After the tests results are displayed, the user should type LOGIN:

AIRLINK PRO 64S> LOGIN

The user is now in the Login Mode. Press <RETURN> and enter the Password when prompted. If you issue any command without logging in first, the system reminds you to log in:

AIRLINK PRO 64S> TYPE LOGIN FIRST

NOTE When the unit is prepared for shipment, it is configured with a null password as a default.

To gain access to the system the first time, press <Return> in response to the log in prompt for the Password. This password will remain in effect until changed.

If you wish to change the Password, issue the command SET PASSWORD at the prompt (see the section on PASSWORD later in this chapter for setting a new password). If the Password is accepted, the system displays an OK response and you gain access to the commands.

The LOGIN command exists only at the local unit. There is no remote LOGIN. When logged in to the local unit, you have access to the other unit in a point-topoint system.

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Logout

This command is used to exit the system. It should be done when all configuration and setup is completed to prevent unauthorized use of the system.

AIRLINK PRO 64S> logout

Help

This command is a request for the on-line help facility. If the HELP keyword is not followed by any additional parameter, a command summary is displayed. If a specific command follows the HELP keyword, a list of all the possible parameters for the specified command is displayed. You can also type in a help request for a particular command combination, to see what comes next:

AIRLINK PRO 64S> help set

The system displays a list of command keywords similar to the following:

Next available Keywords or Operand:

ALARM APPLICATION COMM CONNECTION DATA DATE APPLICATION SITE PN CODE TX CLOCK TX VCXO

Local, Remote and Both Operations

The Command Line Interface allows the user to configure and monitor both ends of a point-to-point link. To configure the local end only, the "LOCAL" keyword may be used, but it is optional. To configure the far end only, the "REMOTE" keyword must be used. To configure both ends of the link, the "BOTH" keyword must be used. These keywords, when used, must precede the command keyword to be invoked.

The syntax is as follows:

3-6

(LOCAL) <command> REMOTE <command>

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BOTH <command> For example, if you type SET SITE NAME Sunnyvale at the prompt, the

site name is changed to Sunnyvale for the local unit. At the Prompt type

AIRLINK PRO 64S> remote Get status

to query the status of the remote unit. To configure both ends of the link use the BOTH command.

AIRLINK PRO 64S> both Set pn code 4

NOTE REMOTE and BOTH commands apply only to point-to-point configuration.

Administrative Parameters

Site Name

Configuration

The site name identifies the role or location of the specified AirLink Pro 64S. This parameter is optional and can be any convenient description of up to 60 alphanumeric characters.

To set the site name for the local AirLink Pro 64S, type the following command at the AirLink Pro 64S prompt:

AIRLINK PRO 64S> set site name

where name is a description of up to any 60 alphanumeric characters. For example, to set the site name of the local AirLink Pro 64S to Sunnyvale 2, type the following command at the AirLink Pro 64S prompt:

AIRLINK PRO 64S> set site Sunnyvale 2

To set the site name of the remote AirLink Pro 64S, use the command:

AIRLINK PRO 64S> remote set site name

It is important to select a site name that will distinguish the unit from others in the network. This allows conformation that changes are being made to the desired link. The site name is also saved when the Alarm Log is saved as a file on a PC.

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Date and Time

The date and time are used in system operations as well as to provide a reference in time-stamping status, performance and alarm information.

To set the date for the local AirLink Pro 64S, type the following command at the AirLink Pro prompt:

AIRLINK PRO 64S> set date date

The operand date is the calendar date, and takes the form mm/dd/yy, where mm is a number from 1 to 12, dd is a number from 1 to 31, and yy is the last two digits of the current year. For example, to set the date of the local AirLink Pro 64S, type the following command at the AirLink Pro 64S prompt:

AIRLINK PRO 64S> set date 9/30/96

To set the time for the local unit, type the following command at the AirLink Pro 64S prompt:

AIRLINK PRO 64S> set time time

The operand time is a 24-hour clock value that takes the form hh:mm:ss, where hh is a number from 0 to 23, representing the hour, mm is a number from 0 to 59 representing the minute, and ss is a number from 0 to 59, representing the second. Seconds are optional; if you don’t enter a value for seconds, the system assumes a setting of 00 seconds. For example, to set the time of the local AirLink Pro 64S, type the following command at the AirLink Pro 64S prompt:

AIRLINK PRO 64S> set time 10:35:00

To set the time of the remote unit, use the command:

AIRLINK PRO 64S> remote set time time

or save a step by using the BOTH command

AIRLINK PRO 64S> both set time 14:26:00

NOTE The additional time required to access the remote end of the link is a fraction of a second

and need not be taken into account.

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Password

The password is needed when the unit is powered on, or after the operator logs off the system and wants to enter it again. The operator must provide the correct password to use the GET, SET, RESET, TEST and REMOTE commands.

When the unit is prepared for shipment, it is configured with a null password as a default. To gain access to the system the first time, press <Return> in response to the log in prompt for the password.

To protect the system, you should change the password at the earliest opportunity. The new password should also be written down and stored in a safe place. After changing the password, you should test the new password by logging out and in again.

NOTE If you lose your password, contact Cylink Customer Service for assistance.

A password can be any convenient combination of up to 16 alphanumeric characters from the set a-z, A-Z, and 0-9. The Password is case sensitive.

Configuration

To set or change the password for the local unit, type the following command at the AirLink Pro 64S prompt:

AIRLINK PRO 64S> set password

The system prompts you to enter the old password, prompts you to enter the new password, and then prompts you to enter the new password again, for confirmation. If the second instance of the new password matches the first instance of the new password, the new password is accepted. A password can be any convenient combination of up to 16 alphanumeric characters.

For example, the local AirLink Pro 64S is new and currently has no password. To set the password to 1Awombat, you would type the following commands at the AirLink Pro 64S prompt:

AIRLINK PRO 64S> set password Old Password: <Return> New Password: 1Awombat Retype New Password: 1Awombat

Setting Link Parameters

NOTE These are service-affecting configuration parameters. Changing any of these parameter

values disrupts the radio link for the time it takes to set compatible parameter values for both ends of the link. Do not initiate Simplex (test) BURST MODE for the remote unit, or you will be forced to travel to the remote site to reconfigure the unit.

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Application

The APPLICATION parameter specifies the role of the unit in a specific system configuration. Figures 3-1 to 3-4 show the various valid configurations. The APPLICATION parameter has the following valid options:

1. Slave Unit in Point-to-Point Link

2. Master Unit in Point-to-Point Link

3. Master Unit at Repeater Site

4. Reference Master Unit at Hub

5. Backup Master Unit at Hub

6. Subordinate Master Unit at Hub

7. Master Unit in Multipoint Link

8. Slave Unit in Multipoint Link

To set the application for the local AirLink Pro 64S, type the following command at the AirLink Pro 64S prompt:

AIRLINK PRO 64S> set application operand

where operand is a number in the range 1 to 11, corresponding to the options listed above. If you do not specify a value, the system assumes the default value: 1 (slave unit in a point-to-point link). For example, to set the application for the local AirLink Pro 64S to 4 (reference master at a hub), type the following command at the AirLink Pro 64S prompt:

AIRLINK PRO 64S> set application 4

To set the application of the remote AirLink Pro 64S, use the command:

AIRLINK PRO 64S> remote set application operand

All units are shipped from the factory configured as slave units in a point-topoint link. You must configure one of the units in the pair as a master so that the system alignment procedures can be performed. Use your application plan (discussed above) to determine how each unit will be configured.

The following sections describe the use of these applications in point-to-point and multipoint links, hubs, and repeaters.

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Point-to-Point Link (Applications 1 and 2)

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In a point-to-point link ( See Figure 3-1), where one AirLink Pro 64S modem pair consists of a master unit (Application 2) and a slave unit (Application 1), the master unit provides the burst synchronization signal source for the link when transmitting data. The slave unit synchronizes to this timing reference when it transmits data back to the master unit.

Figure 3-1

Point-to-Point Application

AirLink Pro 64S Installer’s Guide

Configuration

Point-to-Multipoint Link (Application 8 and 7)

In a Point-to-Multipoint link (Figure 3-2), one master unit (Application 7) communicates with two or more slave units (Application 8). In this configuration, the host DTE may receive a response from a remote DTE while broadcasting a poll or transmitting data to a second remote DTE. All the slave units receive when the master unit transmits. The master unit receives when a slave transmits. Only one slave unit transmits at a time and this is determined at the DTE interface level, transparent to the AirLink modems via the assertion of the DTE interface signal “RTS”. The master unit provides the burst synchronization signal source for the link to each slave unit in the system. Each slave unit synchronizes to this timing reference when it transmits data back to the master unit.

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AirLink Pro 64S Installer’s Guide Configuration

Figure 3-2

Point-to-Multipoint Application

Hub Application (Applications 4, 5, and 6)

A hub application is used when two or more full-duplex links emanate from a single centralized location. In a hub configuration, two or more units are colocated at the hub site. One of the units is the synchronizing unit, the Reference Master (Application 4), which generates the burst timing reference for the other units. This burst synchronization minimizes near-end interchannel interference among the units and all the units transmit and receive at the same time. Should the Reference Master unit fail, a second unit, Back up master at a Hub (Application 5), is designated to provide the burst synchronization signal to the rest of the units at the Hub. All other units are configured as Subordinate Master units (Application 6) [ See the section “Burst Synchronization” in Chapter 2].

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Figure 3-3

Hub Application

Repeater (Application 3)

When either the range is too great for a single hop installation between master and slave, or line of sight can’t be achieved due to physical obstacles, one solution is to use a repeater configuration. Repeater mode extends the range of remote slave units. As shown in Figure 3-4 , this is accomplished by connecting a slave unit to a master unit in a repeater mode. A repeater is a special case of a secondary hub in which the burst sync signal source is a slave modem. This allows communication with remote slave units that otherwise could not be reached. In a repeater, the two AirLink Pro 64S units that form the cross-over point between the previous segment of the entire repeater link and the next segment of the repeater link are referred to as the repeater site .

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AirLink Pro 64S Installer’s Guide Configuration

Figure 3-4

AirLink Pro 64S Two Part Repeater Link

At a repeater site, there are two modems: the slave modem (Application 1 or Application 8) for the previous hop, and the master modem (Application 3) for the next hop. To avoid interference, these modems must be burst synchronized, and since the slave's burst synchronization signal is defined by the received signal from the originating master, it must provide a burst synchronization signal to the repeater master modem for the next hop. A crossover cable must connect the DTE interfaces of the two modems at the repeater site.

The burst synchronization signal pair of the slave unit at the repeater site is wired to the burst synchronization signal pair of the master unit at the repeater site so that the slave at the repeater site provides the burst synchronization signal for the master unit of the next segment of the link.

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Configuration

Repeater Variations

If other AirLink Pro 64S units are located at the repeater site, the repeater site is treated as a hybrid hub, where the added units are wired to the burst synchronization signal pairs of the slave at the repeater site and synchronize their transmit bursts to the burst synchronization signal from the slave at the repeater site. These units should be configured as master units at a repeater site (Application 3) for the next hop of the repeater link, or as secondary masters at a hub (Application 6) for all other links.

If the entire repeater link is set up as a point-to-point link, the AirLink Pro 64S unit that serves as the near-end unit in the entire repeater link can be configured as a master unit in a point-to-point link (Application 2). The AirLink Pro 64S unit that serves as the far-end unit for the entire repeater link is configured as a slave unit in a point-to-point link (Application 1).

Each Repeater hop has a master and a slave modem. The master in the first hop is set up as a point-to-point master or a Hub master depending on the application. The masters for all other hops are set up as Master unit at a repeater site (Application 3). All slaves are set up as slave units in a point-topoint link (Application 1).

Configuring the DTE Interface

The AirLink Pro 64S DTE port is the physical interface by which user data is transported into and out of the modem. The DTE port consists of two physical connectors, only one of which can be active at any particular time. One connector is used for RS-232 interfaces, and the other is used for V.11/V.35 and EIA-530 interfaces. The DTE interface emulates DCE operation and should be connected to a DTE. Configuration of the DTE interface consists of setting the interface mode, the data stream parameters, and the flow control parameters to match the user’s Data Terminal Equipment, using the following appropriate commands

DTE Mode

This command is used to choose the DTE interface standard. The values are Disabled, RS-232, EIA-530 and V.35. The DTE interface incorporates a protection circuit which helps to prevent damage to customer equipment and the modem interface circuitry. Since the interface standards specify different voltage levels, damage can occur if the AirLink Pro 64S is configured for an interface standard different from the one being delivered via the cable going into the DTE connector. The actual interface available on the connector used for

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the V.35 and the EIA-530 standards is configurable using the “SET DTE MODE” command.

When the unit is powered up for the first time, all three interfaces are disabled. The drivers to each of the two connectors are tri-stated. Before the DTE interface can function, the SET DTE MODE must be issued to select the desired DTE interface standard.

A DTE interface protection circuit is included in the AirLink Pro 64S modem. See the command below for the use of this feature.

DTE Protection

The DTE ports support three different interface standards, which use different voltage levels for the interface signals. As a result, there is a possibility of damaging the internal interface circuitry if a DTE device using one of the three standards is connected to an AirLink 64S modem configured for a different standard. Both of the connectors provided are in DB-25 format, one used for RS232 connections, and the other for V.35 or EIA-530 connections. Only one interface standard can be enabled at any one time. To minimize the potential for damage, a protection circuit has been included in the modem to sense voltage levels of certain signals and disable the interfaces when an incorrect voltage is detected.

In order for the protection circuit to function properly, certain interface signals must be present. The RS-232 interface uses the TXD (Transmit Data) signal exclusively for voltage detection, but the V.35 and EIA-530 interfaces use both TXD and DTR (Data Terminal Ready). Depending on the user’s equipment, the lack of interface signals may be caused by the inadvertently disabled interface. To avoid this, a command has been provided to enable or disable the protection circuit. It is important to bear in mind that if this circuit is disabled, or if the proper interface signals are not active, protection of the interface cannot be guaranteed.

To set up the DTE protection circuit, type the following command at the AirLink Pro 64S prompt:

AIRLINK PRO 64S> set DTE Protection operand

where operand is enabled or disabled.

NOTE When the DTE Protection feature is enabled, the user’s DTE equipment must provide RS-

232 signal voltage levels greater than 7 volts for the interface to activate. This is necessary to discriminate between a proper RS-232 connection and an improper V.35 or EIA-530 connection.

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Data Rate

AirLink Pro 64S Installer’s Guide

Configuration

Therefore, if the DTE equipment is supplying an RS-232 signal using voltage levels less than 7 volts, the AirLink Pro modem will not operate correctly unless the DTE Protection circuit is disabled.

Table 3-1

Voltage Requirements DTE Protect Configuration

DTE Interface Voltage Requirements

RS-232 on TXD>7.0 or <-7V V.35 on DTR >7.0V or <-7V and

on TXD <7.0V or >-7.0V

EIA-530 on DTR <7.0V and >-7V

and on TXD <7.0V and >-7V

This command specifies the data rate for synchronous and asynchronous data transmission. For asynchronous data rates up to 16.0 kbps that are not specifically listed, 64 kbps synchronous mode should be selected.

Comm Mode

To set the data rate for the local unit, type the following command at the AirLink Pro 64S prompt:

AIRLINK PRO 64S> set data rate operand

where operand is 64, 56, 19.2, 9.6, or 4.8 for synchronous and 19.2, 9.6, or 4.8 for synchronous or asynchronous. If you do not specify a value, the system assumes the default value: 64 kbps.

This command specifies the communications mode of the unit. For asynchronous mode, it specifies the character lengths of the data. Total character length includes the start, stop, parity, and data bits; all are in accordance with CCITT V.14 standard and ITV standard V.14. The values are Synchronous, 8-bit, 9-bit, 10-bit, and 11-bit, where the last four are all asynchronous modes. To set the Comm Mode for the local or remote unit, type the command followed by the operand after the command line prompt:

AIRLINK PRO 64S> set comm mode operand

Asynchronous data of rates up to 16 kbps can also be handled via oversampling. This is accomplished by setting the Comm Mode to Synchronous, the data rate to 64 kbps, and the TX Clock Source to Internal. In this case, the asynchronous

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data bits are sampled by a 64 kHz clock in the transmitter, which means that there are at least four samples per bit. The asynchronous bits are then reconstructed on the other side of the link by the receiver. For all asynchronous data applications, if the DTE is providing a clock signal on the TT pin, the command “Set TT Clock Detect Off” should be issued to avoid confusing the AirLink unit’s automatic detection circuit.

RTS Source

The RTS Source is the Request-to-send signal source for the unit. It takes the values Internal and External. Internal is selected when data flow control is not needed (for instance, in a point-to-point link). The unit ignores the RTS lead and activates the RTS internally. External is selected when data flow control is needed (for instance, in multipoint application or point-to-point repeater extensions to or from multipoint system). The unit responds to RTS lead and CTS signal follows RTS to CTS delay as specified with the RTS DELAY parameter.

RTS Delay

This command is used to specify the maximum RTS to CTS delay time in milliseconds. This delay time has an effect on the polling frequency. (Applies only when RTS SOURCE parameter is set for EXTERNAL). The values the command takes are 0, 17, 34, and 127.5.

Configuring for Different Synchronous Data Clock Modes

The AirLink Pro 64S synchronous data clock mode is determined by two parameters: the internal clock oscillator phase reference and the transmit data sample clock source. The commands that set these parameters are described below. These commands are used to configure the modem for one of the four clocking configurations (DCE/ST, DCE/TT, DTE/TT, or HUB/ST) described in the AirLink Site Planning Guide in the chapter entitled “System Planning”. The command sequences required to emulate these AirLink One clocking modes can be found after the command descriptions.

The use of these commands is optional and will not be needed for most installations, as these parameters are set to defaults depending on which application is selected by the “Set Application” command. The default values

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for all the applications are shown in the table below. Although there is not necessarily an exact one-to-one correspondence between AirLink One and AirLink Pro 64S clocking modes, the equivalent clock mode from the AirLink Site Planning Guide that most closely matches is shown in the table. In general, the default values assume that the modem clock will be used by the DTE as a reference to clock out its data.

Table 3-2

Applications with Clock Modes

AirLink Pro 64S Installer’s Guide

Configuration

Application Number

1 Slave Unit in a P-P Link Receive_Clock Internal DCE/ST 2 Master Unit in a P-P Link Free_Run Internal DCE/ST 3 Master Unit at a Repeater Site Burst_Sync_Clock External DTE/TT 4 Reference Master at a Hub Free_Run Internal DCE/ST 5 Backup Master at a Hub Burst_Sync_Clock Internal HUB/ST 6 Subordinate Master at a Hub Burst_Sync_Clock Internal HUB/ST 7 Master Unit in a MP Link Receive_Clock Internal DCE/ST 8 Slave in a MP link Free_Run Internal DCE/ST

Application TX VCXO Source TX Clock

Source

Clock Mode

TX Clock (Source)

This command sets the Transmit (TX) clock source. The values are either internal or external. When set to internal, the modem uses its internal oscillator to clock in the transmit data. If a clock signal is detected on the “TT” (Terminal Timing) pin of the DTE interface, this clock is used instead, and it should be a looped back version of the clock supplied by the modem on the “ST” (Send Timing) pin. When set to external, the modem uses the clock supplied by the user on the “TT” pin of the DTE interface. If no clock is provided, the modem will not function properly.

To set the TX Clock for the local unit, type the following command at the AirLink Pro 64S prompt:

AIRLINK PRO 64S> set TX Clock operand

where operand is internal or external. The default value is internal.

TX VCXO Source

This command sets the phase reference for the AirLink Pro 64S modem internal transmit clock oscillator. Normally it is desirable for an entire data network to

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be synchronized to a single, stable frequency reference. The various network configurations that AirLink Pro supports require four choices for the phase reference: no reference (the oscillator freeruns), the externally-supplied TT clock from the DTE interface, a clock derived from the received RF signal, and a clock supplied on the burst sync bus.

To set the transmit VCXO phase reference source, type the following command at the AirLink Pro 64S prompt:

AIRLINK PRO 64S> set tx vcxo operand

where operand is free_run, tt_clock, burst_sync_clock, or receive_clock. Generally, the source of synchronization will be either an AirLink modem’s own

internal oscillator or an oscillator residing in the DTE equipment. If the modem’s oscillator is the source, it does not need a phase reference (Free_Run). If an external oscillator is the source, the modem VCXO must be synchronized to a phase reference derived from the externally-provided clock signal from the DTE port (TT_Clock). All other modems in the network must also be synchronized to this source. Other AirLink Master units at a hub are synchronized via the Burst Sync Bus, which provides a phase reference (Burst_Sync_Clock) for the VCXO. AirLink Slaves are typically synchronized with a phase reference derived from the received RF signal (Receive_Clock).

TT Clock Detect

A sensing circuit is provided in the AirLink Pro 64S modem to detect the presence of an externally-provided clock on the “TT” (Terminal Timing) interface pin. Normally, if the modem is the source of the transmit clock (command: Set TX Clock Source Internal), the modem sends this clock to the DTE via the “ST” (Send Timing) interface signal, and also uses the local version of the clock to sample the incoming transmit data from the DTE. In some cases, long cables may introduce enough delay between the local clock and the data that errors develop in the data stream. This can be avoided if the received ST clock is “looped-back”, or wired to, the TT clock pin of the DTE interface. The TT clock detector circuit will recognize this, and provides automatic selection of the TT clock when the modem clock is used for timing.

If the data clock source is external (command: Set TX Clock Source External), this circuit is disabled, and the clock is always received on the TT pin of the DTE port.

To override these default conditions, the following command can be used. To set up the TT Clock Detect circuit, type the following command at the

AirLink Pro 64S prompt:

AIRLINK PRO 64S> set TT clock detect operand

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where operand is on (to activate the circuit) or off (to de-activate the circuit). The system displays auto-detect mode by issuing the following command:

AIRLINK PRO 64S> get TT clock detect operand

AirLink One Clock Mode Emulation

The following sections describe how to set up AirLink Pro 64S modems to emulate AirLink One clock modes. See the AirLink Site Planning Guide for more information on this topic.

DCE/ST

This mode requires that the internal oscillator provide the frequency reference, and therefore it can freerun since it doesn’t need to be locked to an external reference. Furthermore, the transmit data is sampled by the local version of the data clock.

AirLink Pro 64S Installer’s Guide

Configuration

DCE/TT

AIRLINK PRO 64S> set tx vcxo free_run

AIRLINK PRO 64S> set tx clock source internal

If the TT clock detector is enabled, the AirLink modem will sense and use a clock that is looped back from the “ST” pin to the “TT” pin on the DTE interface.

This mode is again using the internal oscillator in a freerunning mode, and in this case it is expected that the ST clock will be looped back. The previous configuration (DCE/ST) will handle this condition if the TT clock detector is enabled, but if the user desires to force this mode, the following commands will accomplish this:

AIRLINK PRO 64S> set tx vcxo free_run

AIRLINK PRO 64S> set tx clock source external

In “external” transmit clock source mode, the TT clock detector is always disabled, and the modem will be forced to use the clock arriving on the “TT” pin of the DTE interface. Be aware that if no clock is present, the modem will not function properly.

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DTE/TT

This mode is used when it is desired to synchronize the AirLink Modem to an external reference. Generally, only one modem in a network will be configured in this mode, and the rest will be synchronized to the master oscillator via the RF signal or the burst sync signal.

In this mode, the internal oscillator is synchronized to the incoming clock on the “TT” pin of the DTE interface, which in this case is NOT a looped back version of the “ST” clock, but is instead an independent reference frequency. The transmit data is also sampled by the TT clock. The following commands will emulate this mode.

AIRLINK PRO 64S> set tx vcxo tt_clock

AIRLINK PRO 64S> set tx clock source external

HUB/ST

This mode is required when multiple AirLink modems are present in a single location, known as a hub. One of the modems, the primary or synchronizing master, must act as the frequency reference for the entire network, and the other modems at the hub, referred to as secondary or synchronized masters, must be operated in this mode. The following commands are used for this purpose.

AIRLINK PRO 64S> set tx vcxo burst_sync_clock

AIRLINK PRO 64S> set tx clock source internal

In this case, the internal oscillator is synchronized to the clock signal arriving via the burst sync cable. A local version of the data clock is derived from this oscillator, and sent to the DTE via the “ST” pin. The modem will use the local version of the clock to sample the arriving transmit data, unless of course the clock is looped back onto the “TT” pin, and the TT clock detector is enabled.

Independent Network Clocks

It is generally desirable for all of the data clocks within a communication network to be synchronized to a common frequency reference. This results in all of the network data clocks being frequency-locked, that is, they do not drift with respect to each other. In some cases, it may be desirable for some of the data clocks to be independent. In a full-duplex point-to-point link, for example, the transmit clock (TT) and the receive clock (RT) are usually synchronized to a frequency reference at one end of the link. With AirLink Pro 64S, the Master

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Configuration

modem transmit oscillator acts as the frequency reference, whether it is freerunning or locked to an external reference from the DTE. However, there may be other applications where the transmit and receive data streams need to maintain synchronization with clocks that originate from independent oscillators at either end of a link.

Figure 3-5

Independent Network Clocks

When two or more wireless links are networked together, such as a hub configuration, the entire network is usually synchronized to a single frequency reference. In some cases, it may be desirable for some of the individual links to operate with independent clocks, and again, within a single full-duplex link, it is sometimes desirable for the transmit (TT) and receive (RT) clocks to be independent. In the past, AirLinks have required that all clocks be synchronized to a single Master modem at the Hub Site, but AirLink Pro 64S provides the flexibility to allow some of the clocks to be independent.

If independent clocks are to be utilized in a network, it is crucial to ensure that their frequencies are within a specified tolerance for the AirLink modems to operate without loss of data. All of the data clocks must be accurate within ±75 ppm of their nominal data rate. For example, if the data rate is 64 kbps, the clock frequencies must be in the range of 63.9952 to 64.0048 kHz.

Independent Clocks in a Point-to-Point Link

In a default point-to-point link (Master modem set to Application 2, and Slave modem set to Application 1), the Master modem’s internal oscillator provides the frequency reference for all data clocks. The Master can also be set up to synchronize to an external clock (DTE/TT) as described above. Either way, the slave modem will derive its transmit (and receive) data clock from the received RF signal.

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AirLink Pro 64S Installer’s Guide Configuration

In order to operate the slave modem with an independent transmit clock that is externally provided by the DTE, issue the following commands at the AirLink prompt:

AIRLINK PRO 64S> set tx vcxo tt_clock

AIRLINK PRO 64S> set tx clock source external

This will change the frequency reference for the transmit oscillator from “Receive_Clock”, which is derived from the received signal, to “TT_Clock”, which arrives via the DTE interface port. Also, the transmit data will be clocked into the modem with the DTE clock, versus the local modem clock.

Independent Clocks in a Hub

At a Hub Site, the Master modem designated as Reference Master (application

4) will act as the synchronizing reference in the default configuration. Its own

slave is synchronized via the RF signal, the same as in a Point-to-Point link. The other Master modems (applications 5 and 6) are synchronized to a component of the signal on the Burst Sync Bus.

The links that use a Backup or Subordinate Master modem (application 5 or 6) must be burst synchronized with the Reference Master, but they can be operated with an independent data clock. Since burst synchronization is necessary, the Burst Sync Bus must remain connected even if independent data clocks are used. Issue the following commands to each Master modem where independent clock operation is desired:

AIRLINK PRO 64S> set tx vcxo tt_clock

AIRLINK PRO 64S> set tx clock source external

This command sequence changes the frequency reference for the transmit oscillator from the “Burst_Sync_Clock” to the “TT_Clock”, which arrives via the DTE interface port. Also, the transmit data will be clocked into the modem with the DTE clock, versus the local modem clock.

Configuring the RF Link

The following set of commands are used to set up the parameters that describe the RF communications link. These parameters are particularly important in installations where two or more links will be operating in the same vicinity. In such installations, it is important to manage the use of the limited number of RF channels available, as well as the radiated RF power, in order to minimize the

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Configuration

potential for interference between adjacent links. See the AirLink Site Planning Guide for more information on this topic.

The AirLink Pro 64S has a set of Pseudo-random noise (PN) codes. No PN code is “better” or “worse” than another. Using a different code helps the AirLink Pro 64S separate the desired incoming signal from undesired signals from other AirLink Pro 64S links. The PN codes have been carefully engineered to provide the best separation of desired and undesired signals. These are factory set values and cannot be changed by the user. The user can select any of the eight preset sequences.

The master unit and the slave unit of an AirLink Pro 64S pair must be set to the same PN code (pseudo-random noise code). That setting is then stored in the protected system configuration memory of both units in the pair.

To set the PN code for the local unit, type the following command at the AirLink Pro 64S prompt:

Range

AIRLINK PRO 64S> set pn code operand

where operand is a number from 1 to 8. If you do not specify a value, the system assumes the default value: 1.

AirLink Pro 64S is designed to be compatible with AirLink One modems so that their links can be operated side-by-side in a Hub application. The Master Units at the Hub Site must be burst synchronized (described in the Burst Synchronization section of Chapter 2) and the protocol range limit must be set to the same value. The AirLink Pro 64S has a programmable Range Limit that can be set to 46 miles (approximately 74 km) (AirLink One compatible) or 71 miles (approximately 114 km) (AirLink Pro 64S compatible).

To set the protocol range limit for AirLink Pro, type the following command at the AirLink Pro 64S prompt:

AIRLINK PRO 64S> set range operand

where operand is airlink_1 for a 46 mile limit, and extended for a 71 mile limit. Please note that the protocol range limit is merely an upper bound on range, and

does not take into account other factors such as line-of-sight, multipath fade margin requirements, transmit power level, and so forth.

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RF Plan

This command specifies the radio channel plan. The AirLink Pro 64S may be configured for one of the two sets of channels. The values are Channel Plan 1 (Channels 1-15) and Channel Plan 2 (channels 1-20). Channel Plan 1 consists of 15 channels used in a network consisting of both AirLink Pro 64S and AirLink One 64SMP units. Channel Plan 2 consists of 20 channels that are selected when the AirLink Pro 64S unit is not used in a network containing AirLink One 64SMP units. Refer to Tables 6A and 6B in Appendix B for center frequencies to each channel plan.

RF Power

When there are a number of AirLink Pro 64S pairs in a hub arrangement, the received signal levels are dependent on the distances to the remote sites. You may need to adjust the transmit power level to minimize crosschannel interference and ensure that the received levels at the hub are of equal power. You may also need to set this to comply with applicable regulations.

RF Power sets the transmit power level. The values it takes are from 0 to +28 (dBm) in 1 dB increments.

RF Sleep

The RF section can be powered down into “sleep” mode to conserve power when not in use. You can use this command to power down the RF section. The values are Yes (to power down) and No ( to restore power). If the RF Sleep mode is enabled, the entire RF section is powered OFF.

Setting Alarm Control Parameters

Alarm Reporting

This parameter determines whether alarm events are displayed as they happen or are held until you query for them. The operands are Request and Immediate. If you choose Request, then alarm events are displayed only when queried. When Immediate is chosen, alarm events are displayed as soon as they occur.

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Alarm Level

Alarm Holdoff

HUB_SYNC

AirLink Pro 64S Installer’s Guide

Configuration

This parameter sets the severity level for reporting alarms: Status, Minor, and Major. Status messages are the least severe and all events are reported, while

the Major messages are the most severe and only fault events are reported. Refer to Tables A-1 to A-3 in Appendix A.

This command specifies the amount of time for which an alarm condition must persist before a dialout attempt is made. One or more events may occur and overlap during this interval; there must always be at least one event occurring for the duration of the interval. The value ranges between 0 and 600 seconds.

This parameter specifies the burst sync activity type for a hub application. The values it takes are Single and Dual. If you choose Single, then the activity on the primary burst sync bus is reported; loss of activity on the backup burst sync bus is ignored. The loss of activity on primary burst sync bus generates a Major alarm. If Dual is chosen then activity on primary and backup busses are reported. Loss of activity on either bus generates a Minor alarm; loss of activity on both busses generates a Major Alarm.

Threshold RSSI

The Threshold RSSI command indicates the minimum acceptable Receive Signal Strength indicator value before an entry is made in the event queue. The values range from -95 to -50 dBm.

Threshold RSQ

The Threshold RSQ command indicates the minimum acceptable Receive Signal quality value before an entry is made in the event queue. The values range from 1 to 10 .

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AirLink Pro 64S Installer’s Guide Configuration

Threshold 1 HR ES

This parameter specifies the number of errored seconds (ES) events that must occur in a 1-hour interval before an entry is made into the event queue. One errored second is a 1-second interval in which a CRC-16 error is detected in the data payload. The operand is between 1 and 999.

Threshold 1 HR UAS

1 HR UAS threshold sets the number of unavailable seconds (UAS) events that must occur in a 1-hour interval before an entry is made into the event queue. One unavailable second is a 1-second interval during which Radio Sync Loss has occurred. The value must be in the range from 1 to 99.

Threshold 24 HR ES

This command sets the number of errored seconds (ES) events that must occur in a 24-hour interval before an entry is made into the event queue. The value must be in the range from 1 to 999.

Threshold 24 HR UAS

This command specifies the number of unavailable seconds (UAS) events that must occur in a 24-hour interval before an entry is made into the event queue. The values must be in the range from 1 to 99.

Other Command Keywords and Operands

Besides the SET and GET command keywords, the terminal user interface also provides command keywords for resetting. The Reset command controls the following parameters.

RESET

QRSS ALARMS TEST DEFAULTS

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QRSS

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Configuration

You can use this command to reset the QRSS error register and restart a test.

Alarms

This command resets the alarm events in the event queue.

Test

If you need to terminate a test, issue the command RESET TEST and the system terminates the current test. Only one test can be active at a time. If you attempt to start up a second test while a test is running, the system terminates the first test and activates the second.

Defaults

This command resets the unit to factory default configuration. When a unit is new, or the software revision has been upgraded, the unit's configuration memory will not contain valid, recognizable values. At power-up, the software will sense this to be the case, and set the values to a set of factory defaults. These default values are:

General Default Configuration:

Site Name: (blank) Application: 1. Slave Unit in a Point-toPoint PN Code: 1 RF Channel: 1

RF Frequency: 2404.468 RF Power: 0 dBm RF Channel Plan: 20 channels RF Sleep: No Comm Mode: Synchronous Data Rate: 64 kbps

Burst Timing: Receive Sync Tx Clock Source: Internal

Tx VCXO RF RX clock Hub Sync: Single RTS Source: External RTS Delay: 0 msec DTE Mode: RS-232 DTE Protect: Disabled Alarm Reporting: Request Alarm Level: Status

Date/Time: 23 MAY 1997 10:02:53

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Setting Modem Parameters

Introduction

The AirLink Pro 64S ASCII terminal and Network Management ports are EIA/TIA-232 interfaces that allow terminal devices or personal computers to control and monitor AirLink Pro 64S operation at either end of a point-to-point link. Each EIA/TIA-232 connection can be either a direct connection (device to port), or an indirect connection (device to modem to port) for dial-up operation. When the Network Management Port #1 is connected (and dialed-up, in the case of a modem link), commands issued from that port, along with the responses from the terminal port, are duplicated at Network Management port #2.

The modem support may be configured to work in any of these five modes: DISABLED The port is completely disabled and it will not

respond to user commands or connection indications from the modem.

DEDICATED The port behaves exactly as the Terminal

port; all commands and responses taking place on that port are duplicated on the modem port.

ANSWER The modem port remains idle (does not respond

to user commands) until it receives a dial-in indication from the modem.

DIALOUT ONLY The modem port is used only for dialing-out to

report alarms.

DIALOUT/ANSWER Combines the functionality of the ANSWER

and DIAL-OUT modes.

After the completion of a dial-out, a connection announcement is printed at the remote end. This announcement identifies the unit type, the site name as configured by the user, the date and time, plus a copy of the alarm text message.

For example:

>>> AIRLINK PRO 64S> Sunnyvale Engineering Unit 1

12 APR 95 14:33:59 Receive Power Below Threshold

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Configuration

NOTE The particular alarm message chosen is the highest-priority alarm condition in effect when

dialing commences.

Connection and Configuration

The unit is shipped with a default configuration of DISABLED and 9600 bps. Any changes to the default values can be made using the command line interface. To change the settings, use the command line interface. Each of the configuration items is stored in the configuration database. In addition, the state of the connection is maintained so that recovery from a power failure will re-initiate the connection.

Multidrop configuration (multiple units sharing a modem) is supported only by the use of an external port-sharing device.

Modem Setup Procedures

A pair of Hayes-compatible “external” modems, 1200 bps or higher is required. Configure each modem according to the following procedure. Note that not all so-called smart modems are identical. Please check your modem user’s manual.

Configuring the Modem

1. To reset modem to its factory defaults (for most modems):

a. Connect the modem to a terminal using a standard EIA/TIA-232 modem

cable.

b. Wait one second then type +++ on the terminal. Pause one second again

and then type AT&F<RETURN>.

c. Cycle power on the modem.

2. Configure the modem to ignore DTR, by typing AT&D<RETURN>, or

selecting a DIP switch on some modems.

3. Configure the modem to ignore RTS, by typing AT&K0<RETURN> (Hayes

compatible modems), or AT&H0<RETURN> (US Robotics modems), or by selecting a DIP switch on some modems.

4. Configure the modem for error correction, if the modem is so equipped

(newer modems). This is generally the factory default, but can be invoked by typing AT&Q5<RETURN> on Hayes compatible modems, or

AT&M4<RETURN> on US Robotics modems.

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AirLink Pro 64S Installer’s Guide Configuration

5. Set the number of rings you want the modem to answer on, by typing

ATS0=X<RETURN> where x is a digit from 1 to 9 (the number of rings), or

0 (zero) for no answer.

6. Save the new configuration in the modem’s non-volatile memory by typing

AT&W<RETURN>.

7. Cycle power on the modem.

Connecting the Modem

Connect the modem at the AirLink Pro 64S end as follows:

1. Configure the AirLink Pro 64S modem port speed by issuing the following

command at the Terminal port SET MODEM RATE XXXX <RETURN> where XXXX is the speed in bits per second, for instance 1200, 2400, 4800, or

9600.

2. Connect the unit’s modem port to the modem using a standard EIA/TIA-232 modem cable, with a 9-pin male DB-9 connector at the unit end and an appropriate connector (typically male DB-25) at the modem end.

3. Connect the modem’s phone port to the phone line using an appropriate cable (usually supplied with the modem).

Connecting the Modem to the Remote Terminal

Connect the modem to the remote terminal as follows:

1. Connect the terminal’s modem port to the modem using a standard EIA/TIA-232 modem cable.

2. Connect the modem’s phone port to the phone line using an appropriate cable (usually supplied with the modem).

Testing the Modem Link

1. Issue the following commands at the Terminal port:

Table 3-3

Terminal Commands of the Modem (Port) Interface

Command Definition

SET DIAL LEVEL MAJOR <RETURN> Prevents dialing of most alarms while the link

testing

SET ALARM HOLDOFF 600 <RETURN> Prevents any alarms from being dialed for at least

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AirLink Pro 64S Installer’s Guide

Configuration

10 minutes SET MODEM MODE BOTH <RETURN> Enables dial-in and dial-out SET DIAL TONE <RETURN> TONE (touch-tone) or PULSE (rotary) SET PHONE 1 XXX-XXXX <RETURN> XXX-XXXX is the remote modem phone number SET PHONE 2 XXX-XXXX <RETURN> Optional backup phone number GET MODEM CONFIG <RETURN> To view and verify the modem configuration CALL 1 Manually dial the phone number programmed by

the SET PHONE 1 command above

2. Type characters at the terminal port; they should appear on the terminal connected to the remote modem. Type characters at the remote terminal. They should appear on the local terminal.

3. Type DISCONNECT <RETURN> on the unit’s terminal to terminate the manual dial-out connection. The modem link is now operational.

Functions

Port Duplication

During a manual connection (dial-in or dial-out), the modem and Command Line Interface (CLI) ports appear as one at the character level. Any character typed by either party is echoed on both terminals and entered into the ensuing command. For example, if the CLI port user types "GET" and the modem port user types "<blank>CONFIG" and presses RETURN, both users will see "GET CONFIG" and the GET CONFIG screen.

When first dialing in, the remote user has to enter a password even if the local user is already logged in.

Auto Answer Function

If Auto Answer mode is selected, the unit sends an automatic answering command to the modem to answer incoming calls after a designated number of rings. Otherwise, the modem will be configured not to answer.

Events

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AirLink Pro 64S Installer’s Guide Configuration

Events are defined in the AirLink Pro 64S as Major Alarm, Minor Alarm, or Status. These are the three levels of severity, with Major Alarm being the highest. The user may select a dial-out threshold as one of these levels by issuing the SET DIAL LEVEL command, in much the same way as selecting the event reporting level with the SET ALARM LEVEL command. The Dial-out function will dial out when there is a condition at or above that level. For proper operation, the dial-out severity level must be equal to or greater than the event queuing level.

Dialout Function

During an event, the modem is directed to dial the telephone number(s) in the configuration database and send a brief descriptive announcement. The connection is then terminated. Up to two numbers can be selected; a primary number that will always be dialed first, and a backup number in case the unit cannot reach the primary number. Also, the unit will make repeated attempts to dial if the first attempt is unsuccessful.

Operation

There are two user-configurable thresholds for alarms. An alarm threshold establishes the point when the unit begins to dial-out. In addition, to prevent excessive dialing in the presence of repetitive events, a dial holdoff time is defined.

Alarm Holdoff Time (0 - 600 seconds; default = 10)

One or more events must persist between 0 - 600 seconds before a dial-out attempt is made. When set to zero, the unit dials out immediately.

One qualifying event must be present although Alarm Holdoff does not require the same condition for the entire interval.

Repeat Alarm Count (2 - 1000 counts; default = 10)

Events are alternately declared and cleared for cyclical alarm conditions and must be declared between 2 - 1000 counts during the period defined by Alarm Holdoff Time. The event does not have to be the same one each time. Dial-out is not attempted until the end of the alarm holdoff time, even if the Repeat Count is reached before then.

Dial Holdoff Time (3 - 5000 minutes; default = 15)

Dial Holdoff Time is the length of time to wait between successive dial-outs when alarms are repetitive. This alarm timer operates independently of the

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AirLink Pro 64S Installer’s Guide

Configuration

alarm holdoff time and repeat alarm count. After a dial-out, any persistent or repeated alarm conditions will wait until the end of the dial holdoff time.

Dial Holdoff does not apply in the case of failure to connect; instead, the Dial Retry time is applied.

If any of the above parameters is changed, or if the event queue is reset with the RESET ALARMS command, the holdoff counters and timers will be reinitialized. This is to prevent spurious dial-outs.

Repeat Dialing and Prioritization

During dial-out, an alarm text message is sent according to a prioritization scheme (the highest-severity alarm condition in effect is sent first). If there are multiple alarms present at that level, the text is for the first-occurring event.

Alarm conditions of a persistent nature, that do not clear themselves, will result in repeated dial-outs. Alarms of this class include all the conditions at the Major Alarm levels, such as Radio Sync Loss and No Burst Sync. One-time events, such as Errored-second threshold exceeded, and fault-cleared conditions, result in only a single dial-out.

Telephone Numbers and Dial Format

The primary telephone number is the first number dialed. Ringing will continue for a user-specified period (default is 30 seconds) before giving up as unanswered. When the connection to the primary telephone number is not successful, then the secondary number is attempted.

If neither the primary nor the secondary number is successful, then the AirLinkPro 64S waits for a Dial Retry period before retrying. In this case, an advisory event is logged stating the reason for the failed dial-out. In addition, if the unit is unable to communicate with the modem, it will continuously retry (no holdoff period is imposed), and log an advisory. Only one advisory message of each type will be logged per dialing session (from the first failed attempt until dial-out is successful) in order to prevent the event queue from becoming flooded with dial-out failures. No busy or no-answer advisory event will cause a dialout.

The telephone numbers are entered as 40 characters, including the "ATDT" prefix. If there is no primary number, the secondary number is never attempted. The following characters may be used in the telephone number fields:

0-9 Dial numbers , (comma) Pause 1 second each before processing next char

(to wait for second dial tone after dialing '9')

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AirLink Pro 64S Installer’s Guide Configuration

! Flash (0.5 second ON-HOOK signal) @ causes the modem to wait 30 seconds for one or more rings

followed by 5 seconds of silence before processing the next character. This is used when the system being called does not provide a dial tone.

# # key on touch-tone telephone keypad * * key on touch-tone telephone keypad

- (dash) No meaning; provided for user convenience

( ) No meaning; provided for user convenience ' ' Blank spaces are ignored.

User-Directed Connections

To troubleshoot, enter the command to dial a specific telephone number and hold the connection. The syntax for this command is:

CALL 1

CALL 2

CALL telephone-number

When the parameter is given as 1 or 2, the unit will dial the stored primary or backup phone number respectively. Otherwise, the modem will dial the number supplied on the command line. The telephone number must follow the syntax of the configured telephone numbers.

CALL does not automatically retry upon dial-out failure; this is strictly a manual operation. To redial, use the control-R key to repeat the last command. When this command is used, the connection remains in effect until the user issues a DISCONNECT command, the remote modem hangs up, or (if configured), a Connection Timeout timer expires.

Manual or automatic connections can be terminated immediately by using the following command:

DISCONNECT

This immediately hangs up the telephone connection and returns the dial-out function to IDLE. RTS is returned to its configured state and DTR is released. DISCONNECT also abandons any dial-out attempt in progress but does NOT prevent future dial-outs. For this reason, the mode should be set to DISABLED before performing any maintenance functions.

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RS-232 Modem Port Interface

Data Rate and Port Parameters

The Data Rate is part of the port configuration. The available rates are 1200, 2400, 4800, and 9600 bits per second.

So-called "smart modems" of the type commonly in use, "auto-baud" or adjust their RS-232 bit rate to that of the DTE.

Before using an unknown modem, it is a good idea to reset its configuration to the factory defaults, then configure the three-wire operation if desired. For most modems, this can be accomplished by issuing the following commands:

AT&F<RETURN> Reset to factory defaults AT&K0<RETURN> Ignore RTS AT&D0<RETURN> Ignore DTR

The remaining unchanging port parameters are:

1 start bit 1 stop bit 8 data bits no parity

AirLink Pro 64S Installer’s Guide

Configuration

Protocol Modems

Protocol modems support MNP or other data compression. Since protocol modems introduce unneeded complications for flow control, and the AirLink Pro 64S modem data rate needs are modest, such protocols should be turned off. However, error correction should be enabled if available; it will prevent garbage characters from appearing on the remote terminal when the unit hangs up the modem. This option is normally enabled by factory default on modems equipped with it.

Responses

All numeric responses are followed by <CR> (ASCII 13 decimal). All “word” responses are followed by <CR> and <LF> (ASCII 10 decimal).

Table 3-4

Modem Response Definitions

Modem Response Definition

0 (zero) Numeric version of "OK"

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AirLink Pro 64S Installer’s Guide Configuration

OK Successful execution of non-dial command CONNECT [XXXX] carrier detected; XXXX = numeric bit rate RING Ringing detected NO CARRIER No connection established, or connection lost ERROR Error in command line NO DIALTONE No dial tone present BUSY Busy signal NO ANSWER 5 seconds of silence not detected if '@' dial modifier was used.

User Interface Additions

Table 3-5

Modem Commands

Parameter Specification

SET ALARM HOLDOFF 0-600 (seconds) SET CONNECTION 0 - 43200 (seconds; 0 means no time-out) SET DIAL {TONE | PULSE} SET DIAL HOLDOFF 3-5000 (minutes, repeat dial holdoff) SET DIAL LEVEL MAJOR | MINOR | STATUS SET DIAL RETRY 15-3600 (seconds) SET MODEM MODE {DISABLED | DEDICATED DIAL_OUT | ANSWER | BOTH} SET MODEM RATE {1200 | 2400 | 4800 | 9600} SET PHONE 1 (XXX) XXX-XXXX SET PHONE 2 (XXX) XXX-XXXX SET REPEAT COUNT 0-99 SET RINGCOUNT 0-9

The GET MODEM configuration command retrieves all of the Modem Command parameters. This command produces a screen displaying all of the settings, the dial-out status, and the date and time. In addition, all the SET and GET commands are available via the REMOTE prefix.

The following commands are also supported:

CALL 1 manual connect CALL 2 manual connect

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Configuration

CALL telephone-number manual connect DISCONNECT manual disconnect GET MODEM view modem and dial-out parameters GET RS232 status of RS-232 handshaking lines

Responses and Alerts

Each of the following messages is an advisory. These advisories will not trigger a dial-out, but they are entered into the Event Queue.

"Modem Busy"

"No Modem"

"No Answer"

"No Dialtone"

Default Parameters

Table 3-6

AirLink Pro 64S Dialout Parameters

Parameter Default

ALARM HOLDOFF 10 seconds CONNECTION 3600 seconds (1 hour) DIAL FORMAT TONE DIAL HOLDOFF 5 minutes DIAL LEVEL ALARM MODEM MODE DISABLED MODEM RATE 9600 PHONE 1 (blank) PHONE 2 (blank) REPEAT COUNT 10 events RINGCOUNT 1

Alarm Holdoff

This is the period of time between the onset of the first alarm condition, and the unit dialing out to report the alarm. During this period, an alarm condition must have existed continuously, or a minimum number of events must have

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AirLink Pro 64S Installer’s Guide Configuration

occurred. The minimum number of events is defined by Repeat Count. The alarm events must be all be at or above the severity level, as defined by Dial Level.

To set this value, type the command:

SET ALARM HOLDOFF XXX <RETURN>

where XXX is the time period in (0 - 600) seconds. The default is 10.

Repeat Count

The number of alarm events occurring at or above the Dial Level, during the Alarm Holdoff period, before an Alarm Dialout is initiated.

To set this value, type the command:

SET REPEAT COUNT XX <RETURN>

where XX is the number of (2 - 1000) events. The default is 10.

Dial Level

The severity level that alarm events must be to contribute to an Alarm Dialout. To set this level, type the command:

SET DIAL LEVEL {MAJOR | MINOR | STATUS} <RETURN>

The default level is MAJOR.

Dial Holdoff

The period of time between alarm dial-outs. This time period is independent of the alarm holdoff and dial retry time periods. To set this value, type the command:

SET DIAL HOLDOFF XXX <RETURN>

where XXX is the period in (3 - 5000) minutes. The default is 5.

Dial Format

To set the Dial format to TONE or PULSE, type:

SET DIAL TONE <RETURN>

3-40

SET DIAL PULSE <RETURN>

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AirLink Pro 64S Installer’s Guide

Configuration

The default setting is TONE.

Dial Retry

If the unit dials an alarm and reaches a busy or no answer signal, the unit will dial a second number if one is specified. Both numbers are dialed before a holdoff period is imposed. There is no automatic retry when the unit is configured for manual dialing.

To set the holdoff period before the unit dials the first number again, type the command:

SET DIAL RETRY XXX <RETURN>

where XXX is the period in (15 - 3600) seconds. The default is 60.

Modem (Enabling) Mode

This is the modem operation mode that is described in the section Using the Network Management (Modem) Port. To set this mode, type the command:

SET MODEM MODE {DISABLED | DEDICATED | DIAL_OUT | ANSWER | BOTH}

The default is DISABLED.

Modem Rate

This is the bit rate of the modem port. To set this parameter, type the command:

SET MODEM RATE {1200 | 2400 | 4800 | 9600}

The default is 9600.

Phone Numbers 1 and 2

Phone number 1 is the phone number that the unit will dial first when trying to send out an alarm message. The phone number must be specified if a dial-out mode is chosen. Phone number 2 is an optional second phone number that the unit will dial if Phone number 1 is busy or does not answer.

To set phone numbers, type the command:

SET PHONE 1 XXX-XXXX <RETURN>

SET PHONE 2 XXX-XXXX <RETURN>

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where XXX-XXXX is the phone number. Any string of up to 20 characters is acceptable, provided the modem can interpret it. This string is preceded by the letters ATDT or ATDP depending on whether tone or pulse dialing is selected. Any special dialing prefixes should precede the number entered here, such as “9," for dialing out from a PBX, or any special sequences for disabling Call Waiting. For example:

SET PHONE 1 9, 555-5555 <RETURN>

Ring Count

This mode determines the number of rings the modem at the unit end will answer. In order to use this command, the modem must be connected to the unit and preferably be on hook. To set this value, type the command:

SET RINGCOUNT X <RETURN>

where X is the number of ( 0 - 9) rings. Zero (0) means Do Not Answer. The default is 1.

Connection

This mode determines the time period the unit will terminate a manual connection, either dial-in or dial-out. To set this value, type the command:

SET CONNECTION XXXX <RETURN>

where XXXX is the time period in (300 - 43200) seconds. The default value is 3600 (one hour).

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HAPTER

Operations and Maintenance

This chapter contains information on the operation and maintenance of the AirLink Pro 64S. It includes procedures for monitoring the alarm queue and describes how the AirLink Pro 64S responds to particular alarm conditions.

Inside this chapter:

Overview.................................................................................4-2

Acquiring Status Information............................................4-2

Acquiring Alarm Information..............................................4-7

Acquiring Performance Information...............................4-10

Diagnostic Tools.................................................................4-13

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AirLink Pro 64S Installer’s Guide

Operations and Maintenance

Overview

This chapter focuses on monitoring system operation by querying for status, performance, and alarm information through the terminal user interface. This chapter also includes descriptions of the Major and Minor alarm LEDs on the AirLink Pro 64S digital module. Finally, this chapter describes the diagnostic tests and procedures used to isolate and resolve errors occurring during radio unit operation.

Acquiring Status Information

Each AirLink Pro 64S system maintains an internal database of status and performance information that it uses, in part, to derive the events that are stored in the event queue. The status information categories include:

❚ DTE Status ❚ Radio Synchronization Loss ❚ Burst Synchronization Loss ❚ Test in Progress

DTE Status is available from both the local and the remote AirLink Pro 64S units.

Viewing Status Information

To view the status information for the local unit, type the following command at the AirLink Pro 64S prompt:

AIRLINK PRO 64S> Get status

The system displays a list of status information similar to the following:

AIRLINK PRO 64S> Get status

Site Name : Test in progress: None DTE Status: Disabled Radio Sync Loss: NO Burst Sync Loss: No RSSI: -62.3dBm (typical value)

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Wave Wireless AIRLINKPRO User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual