Wave Wireless AIRLINKPRO User Manual AirPro Manual 64

Wave Wireless Corporation AirPro Manual 64

AirPro Manual 64

Installer’s GuideAirLink Pro 64SCYLINK 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.)Package: 82296-00B Release Date: February, 1997¤HOME
COPYRIGHT © 1994 - 1997 Cylink Corporation World Rights Reserved.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 anytime and without any notice. Cylink Corporation assumes no responsibility for its use, nor any infringementsof patents or other rights of third parties that would result.This Manual could contain technical inaccuracies or typographical errors. Periodic changes are made to theinformation 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 writtenpermission 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 DatastormTechnologies, Inc.All other brand and product names are the trademarks of their respective holders.PRODUCT COMPATIBILITYWhile every effort has been made to verify operation of this product with many different communicationsproducts and networks, Cylink Corporation makes no claim of compatibility between its products and othervendors’ equipment. It is assumed that users have thoroughly evaluated this product’s performance in thecommunications environment in which it will be used.SAFETYThe following general safety precautions must be observed during all phases of operation and service of thisproduct. Failure to comply with these precautions or with specific warnings elsewhere in this Manual willfullyviolates standards of design, manufacture, and intended use of the product. Cylink Corporation assumes noliability 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 shockby providing an escape wire for the current.Do not install or operate this product in the presence of flammable gases or fumes. Operation of anyelectrical 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 beremoved by anyone other than authorized Cylink service personnel. The potential for electrical shock existswithin 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 theproduct to Cylink Corporation for service and repair to ensure that safety features are maintained. Prior toreturning any product(s) for repair, contact Cylink at the telephone numbers or address located on the frontof 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 tooperate the equipment.
LITHIUM BATTERYThe 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. Thelithium battery could explode if mistreated. Do not attempt to expose the battery by opening the real-timeclock component. Do not attempt to recharge the battery. Do not dispose of the component by fire.SYSTEM GROUNDINGDirect grounding of the antenna, mast, and tower serves as protection from lightning strikes and staticbuildup. A direct electrical connection should be made to a suitable grounding rod at the base of the tower ormast 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. Uselightning arrestors in appropriate places.TOWER CONSTRUCTIONCompliance with local zoning and tower construction regulations is recommended when AirLink Pro 64systems require a tower. These regulations generally mandate that permits be obtained before any towerconstruction begins. Check with local zoning and aviation authorities for more information.FCC NOTICE TO USERSThe AirLink Pro 64S complies with Part 15 of the FCC rules. Operation is subject to the condition that thisdevice does not cause harmful interference.Federal Communications Commission (FCC) Rules on spread spectrum devices, such as the AirLink Pro64S, require that you be notified of the following:FCC regulations require that this device be professionally installed by a person knowledgeable in electronicsand 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 USERSThis class B digital apparatus meets all the requirements of the Canadian Interference-Causing EquipmentRegulations.Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur le matériel brouilleurdu Canada.Changes or modifications not expressly approved by Cylink Corporation can void the user’s authority tooperate the equipment.
STATEMENT OF WARRANTYCYLINK products, except as stated otherwise in an applicable price list, are warranted against defects inworkmanship and material for a period of one (1) year from date of delivery as evidenced by CYLINK’spacking slip or other transportation receipt.CYLINK’s sole responsibility under this warranty shall be to either repair or replace, at its option, anycomponent which fails during the applicable warranty period because of a defect in workmanship andmaterial, provided PURCHASER has promptly reported same to CYLINK in writing. All replaced Products orparts shall become Cylink’s property.CYLINK shall honor the warranty at CYLINK’s repair facility in Sunnyvale, California. It is PURCHASER’sresponsibility to return, at its expense, the allegedly defective Product to CYLINK. PURCHASER mustobtain a Return Materials Authorization (RMA) number and shipping instructions from CYLINK prior toreturning any Product under warranty. Transportation charges for the return of the Product to PURCHASERshall be paid by CYLINK within the United States. For all other locations, the warranty excludes all costs ofshipping, customs clearance and other related charges. If CYLINK determines that the Product is notdefective 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) ifadjustment, repair or parts replacement is required because of accident, unusual physical, electrical orelectromagnetic stress, negligence of PURCHASER, misuse, failure of electric power environmentalcontrols, transportation, not maintained in accordance with CYLINK specifications, or abuses other thanordinary use (ii) if the Product has been modified by PURCHASER or has been repaired or altered outsideCYLINK’s factory, unless CYLINK specifically authorizes such repairs or alterations; (iii) where CYLINKserial 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 tomake the same changes in Products previously manufactured or purchased. In no event shall CYLINK beliable for any breach of warranty in an amount exceeding the net selling price of any defective Product. Noperson, including any dealer, agent or representative of CYLINK is authorized to assume for CYLINK anyother liability on its behalf except as set forth herein. Nonpayment of any invoice rendered within the statedpayment terms automatically cancels any warranty or guarantee stated or implied. If any payment is dueCYLINK for services performed here under, it shall be subject to the same payment terms as the originalpurchase.CYLINK HEREBY DISCLAIMS ALL IMPLIED WARRANTIES ON PRODUCTS INCLUDING WITHOUTLIMITATION, ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULARPURPOSE. The warranties expressly stated herein are the sole obligation or liability on the part of CYLINKarising 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’swarranty 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 toCYLINK.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 LOSSOF USE, DATA OR PROFITS ARISING OUT OF OR IN CONNECTION WITH THIS AGREEMENT, OR THEUSE OF PERFORMANCE OF CYLINK PRODUCTS, REGARDLESS OF WHETHER THE CAUSE OF ACTIONIS 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 thisAgreement, may be brought by either party more than eighteen (18) months after the cause of action hasaccrued, except that an action for nonpayment may be brought within eighteen (18) months of the date oflast payment.
vTable of ContentsPreface ......................................................................................................xiiiWho Should Read This Guide.............................................................. xivPrerequisite Knowledge ....................................................................... xivGuide Organization ............................................................................. xivGuide Conventions ................................................................................ xvTypographic Conventions .............................................................. xviKeyboard Usage..............................................................................xviNotes, Cautions, and Warnings ..................................................... xviiCustomer Support ............................................................................... xviiReader Response ............................................................................... xviiiChapter 1: Product Description................................................................... 1-1Introduction to the AirLink Pro 64S....................................................... 1-2Features and Capabilities ................................................................... 1-3AirLink Pro 64S Antenna.................................................................1-4Network Management Ports.............................................................1-4Programmed Configuration Parameters .......................................... 1-5Monitoring and Diagnostic Capabilities ......................................... 1-5AirLink Pro/AirLink One Compatibility.........................................1-6Chapter 2: Installation.............................................................................. 2-1Overview............................................................................................ 2-2Unpacking ........................................................................................... 2-2Identifying Physical Features.............................................................. 2-3Front Panel.................................................................................... 2-3Rear Panel..................................................................................... 2-5Site Preparation...................................................................................2-5General Physical and Environmental Characteristics.......................2-5Lightning Protection........................................................................2-6Power Requirements....................................................................... 2-6Setting Up the System.......................................................................... 2-6Installing the Antenna ................................................................... 2-6
viInstalling the AirLink Pro 64S.........................................................2-8Batch File Handling.....................................................................2-16Burst Synchronization .................................................................. 2-17Checking Operation ........................................................................... 2-28Power-Up LED Sequence................................................................2-28Initial Unit Configuration ............................................................ 2-29Aligning the Antenna ................................................................... 2-31Chapter 3: Configuration ........................................................................... 3-1Overview ............................................................................................ 3-2Using the ASCII Terminal Interface ..................................................... 3-2Command Line Interface................................................................. 3-2Command Keyword List ................................................................. 3-4Administrative Parameters ................................................................. 3-7Site Name ..................................................................................... 3-7Date and Time ............................................................................... 3-8Password ....................................................................................... 3-9Setting Link Parameters ..................................................................... 3-10Application ................................................................................. 3-12Configuring the DTE Interface.............................................................3-15DTE Mode.....................................................................................3-15DTE Protection..............................................................................3-16Data Rate..................................................................................... 3-17Comm Mode..................................................................................3-17RTS Source....................................................................................3-18RTS Delay....................................................................................3-18Configuring for Different Synchronous Data Clock Modes.....................3-18AirLink One Clock Mode Emulation.....................................................3-21DCE/ST........................................................................................3-21DCE/TT........................................................................................3-21DTE/TT........................................................................................3-22HUB/ST.......................................................................................3-22Independent Network Clocks...............................................................3-22Independent Clocks in a Point-to-Point Link...................................3-23Independent Clocks In a Hub..........................................................3-24
viiConfiguring the RF Link......................................................................3-24PN................................................................................................3-25Range...........................................................................................3-25RF Plan.........................................................................................3-26RF Power......................................................................................3-26RF Sleep.......................................................................................3-26Setting Alarm Control Parameters.......................................................3-26Alarm Reporting .......................................................................... 3-26Alarm Level ................................................................................. 3-27Alarm Holdoff..............................................................................3-27HUB_SYNC.................................................................................3-27Threshold RSSI ............................................................................ 3-27Threshold RSQ ............................................................................ 3-27Threshold 1HR ES........................................................................ 3-27Threshold 1HR UAS .................................................................... 3-28Threshold 24 HR ES......................................................................3-28Threshold 24 HR UAS...................................................................3-28Other Command Keywords and Operands ........................................... 3-28Setting Modem Parameters..................................................................3-29Connection and Configuration........................................................3-30Functions.......................................................................................3-33RS-232 Modem Port Interface.........................................................3-36User Interface Additions...............................................................3-38Chapter 4: Operations and Maintenance ..................................................... 4-1Overview ............................................................................................ 4-2Acquiring Status Information ............................................................... 4-2Viewing Status Information ........................................................... 4-2Acquiring Alarm Information ............................................................... 4-7The Event Queue ............................................................................ 4-8Acquiring Performance Information ..................................................... 4-10Viewing Performance Information ................................................. 4-10Resetting Performance Counters ..................................................... 4-12Diagnostic Tools..................................................................................4-13
viiiAppendix A: Messages .............................................................................. A-1General Information ........................................................................... A-2Major Alarm Messages ........................................................................ A-3Minor Alarm Messages ........................................................................ A-3Status Messages .................................................................................. A-4Appendix B: Specifications ........................................................................ B-1General Specifications ......................................................................... B-2Operating and Environmental Specifications..................................B-2Mechanical Specifications.............................................................B-3Power............................................................................................ B-3Interface Specifications ....................................................................... B-3DTE Specifications......................................................................... B-3Radio Interface ............................................................................. B-5Signal-to-Pin Assignments ................................................................... B-8Network Management.................................................................... B-8AC Power.......................................................................................B-6Antenna Connector..........................................................................B-9Burst Sync Connector......................................................................B-10DTE Connectors.............................................................................B-10Crossover Data Cable Specifications............................................ B-13Code of Federal Regulations................................................................B-14Appendix C: Worksheets ........................................................................... C-1Appendix D: Commands.............................................................................D-1Appendix E: Glossary..................................................................................E-1Index ................................................................................................... Index-1
ixFigures1-1 AirLink Pro 64S - Full View.............................................................1-21-2 Point-to-Point Application Showing Master/Slave Configuration....1-41-3 Point-to-Multipoint Application.....................................................1-42-1 AirLink Pro 64S Front Panel.............................................................2-32-2 AirLink Pro 64S Rear Panel.............................................................2-52-3 Typical Antenna Mounts..................................................................2-72-4 Terminal Connection........................................................................2-92-5 Terminal Emulation......................................................................2-112-6 Terminal Preferences.....................................................................2-122-7 Communications............................................................................2-132-8 Ports.............................................................................................2-142-9 Settings for Com 1..........................................................................2-142-10 Advanced Settings for Com 1..........................................................2-152-11 Modem Connection to the AirLink Pro 64S......................................2-162-12 Burst Synchronization Structure.....................................................2-182-13 TDD Burst Structure......................................................................2-192-14 Burst Sync Wiring.........................................................................2-202-15 Burst Sync Backup.........................................................................2-212-16 Burst Sync Compatibility .............................................................2-252-17 Burst Sync Compatibility..............................................................2-273-1 Point-to-Point Application............................................................3-113-2 Point-to-Multipoint Application...................................................3-123-3 Hub Application...........................................................................3-133-4 AirLink Pro 64S Two Part Repeater Link........................................3-143-5 Independent Network Clocks.........................................................3-234-1 AirLink Pro 64S Loopback Tests.....................................................4-144-2 AirLink Pro 64S in Test Loopback Local..........................................4-154-3 AirLink Pro 64S in Remote Test Loopback Local..............................4-164-4 AirLink Pro 64S in Test Loopback Remote.......................................4-174-5 AirLink Pro 64S in Remote Test Loopback Remote...........................4-184-6 Asserted RTS in Multipoint Configuration......................................4-20B-1 DB9 Female Network Management Connector.................................B-9B-2 DB25 Female DTE Connector..........................................................B-10
xTables2-1 AirLink Pro 64S Front Panel Indicators.............................................2-42-2 AirLink Pro 64S Rear Panel Connectors.............................................2-52-3 Voltage Requirements.....................................................................2-62-4 Normal Burst Sync Activity..........................................................2-232-5 Bus A Activity Lost.......................................................................2-232-6 Bus B Activity Lost.......................................................................2-242-7 Bus A and Bus B Activity Lost........................................................2-242-8 LED Indicators..............................................................................2-282-9 Error Codes...................................................................................2-292-10 Signal Quality..............................................................................2-323-1 Voltage Requirements DTE Protect Configuration...........................3-173-2 Applications with Clock Modes.....................................................3-193-3 Terminal Commands of the Modem (Port) Interface........................3-323-4 Modem Response Definitions.........................................................3-373-5 Modem Commands.........................................................................3-383-6 Dial Out Parameters.....................................................................3-394-1 Receive Signal Quality...................................................................4-6A-1 Major Alarm Messages....................................................................A-3A-2 Minor Alarm Messages...................................................................A-3A-3 Status Messages.............................................................................A-4B-1 Operating and Environmental Specifications..................................B-2B-2 Mechanical Specifications.............................................................B-3B-3 Power Specifications......................................................................B-3B-4 DTE Specifications.........................................................................B-4B-5 General Specifications...................................................................B-5B-6 Transmitter....................................................................................B-6B-7a Channel Plan 1...............................................................................B-6B-7b Channel Plan 2...............................................................................B-7B-8 Receiver........................................................................................B-7B-9 Data Interface Standards...............................................................B-8B-10 Terminal Connection.......................................................................B-9B-11 RS-232 Pin Assignments.................................................................B-11B-12 EIA-530 and V.35 Pin Assignments.................................................B-12
xiB-13 EIA 530 25-Pin Male Connectors.....................................................B-13B-14 RS-232 25-Pin Male Connectors......................................................B-13B-15 Point-to-Point Maximum Delay.....................................................B-14
Rev. B - 2/97 xiiiPPREFACEREFACEAbout This GuideAbout This GuideThe AirLink Pro 64S Installer’s Guide covers the information neededto unpack, install, configure, and operate the AirLink Pro 64S system.Begin by reading this preface for more information about how thisguide supports your use of the AirLink Pro 64S system.Inside this chapter:Who Should Read This Manual...............................................xivPrerequisite Knowledge .......................................................xivGuide Organization..................................................................xivConventions Guide....................................................................xvCustomer Support ............................................................... xviiReader Response ................................................................. xviii
AirLink Pro 64S Installer’s GuideAbout This Guidexiv Rev. B - 2/97Who Should Read This ManualThis is an installation guide for persons who must perform or coordinate thetasks associated with unpacking and installing the AirLink Pro 64S.Prerequisite KnowledgeThroughout this guide are explanations and procedures that presume workingfamiliarity with basic telephone trunking and transmission concepts andpractices, as well as basic digital data communications concepts and practices.If you are not familiar with the concepts and practices involved in thesedisciplines, we recommend that you familiarize yourself with them beforeproceeding.Also, this guide does not attempt to provide any detailed system planning orinstallation information on radio frequency (RF) antenna assemblies or Pathanalysis. For details about these topics, please refer to the AirLink SitePlanning Guide .Guide OrganizationEach of the chapters and appendices in this guide begins by introducing thecontents 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 ofwhat each portion provides.When you come to a procedure, skim through the entire procedure before youbegin performing the step-by-step instructions. By doing this, you will beprepared with the appropriate information, equipment, or tools.The information in this guide is organized according to the sequence of tasksnecessary to plan for unpacking, installing, and configuring, as well as operatingand maintaining the AirLink Pro 64S system.
AirLink Pro 64S Installer’s GuideAbout This ManualRev. B - 2/97 xvThe guide is divided into the following sections:Guide Section DescriptionChapter 1:Product Description Describes the features and capabilities of the AirLinkPro 64S system.Chapter 2:Installation Outlines the procedures for unpacking and installingthe AirLink Pro 64S system hardware, connecting theantenna, and performing initial operation checks.Chapter 3:Configuration Provides instructions for configuring the AirLink Pro64S.Chapter 4:Operations andMaintenanceContains information on the operation andmaintenance of the AirLink Pro 64S system.Appendix A:Messages Lists the system alarm, status, and error messages.Appendix B:Specifications Contains a quick reference to the AirLink Pro 64Ssystem specifications.Appendix C:Worksheets Worksheets are provided to help the user write downconfiguratin parameters for reference.Appendix DCommands Contains list of the Commands needed to configureand operate the AirLink Pro 64S.Appendix E:Glossary Provides definitions for the terms commonly usedthroughout this guide.Index Provides a quick reference to assist you in locatingimportant topics in the guide.Guide ConventionsThe procedures and instructions in this guide use the following conventions:❚Typography that highlights information within text, including screendisplays, figures, and tables.❚Keyboard usage conventions.❚Notes that add information, point to other important considerations, oralert you to possible risks to yourself, your equipment, or your data.
AirLink Pro 64S Installer’s GuideAbout This Guidexvi Rev. B - 2/97Typographic Conventions❚Terminal displays are shown as text in the Courier font ( this is just anexample, your configuration will probably be different):AIRLINK PRO > Get ConfigurationSite Name:Application: 2. Master Unit in a Point-to-Point LinkPN Code: 1RF Channel Plan: 20 channelsRF Channel: 1RF Frequency: 2404.468RF Power: 0 dBmRF sleep: NOComm Mode: SynchronousData Rate: 4.8 KbpsBurst Timing: Receive syncTx Clock Source: InternalTx VCXO Ref Free RunHub Sync: SingleRTS Source: InternalRTS delay: 0 msecDTE mode: RS-232DTE Protect: DisabledAlarm Reporting: RequestAlarm Level: StatusDate/Time: 01 Sept 1996 10:35:00❚Bold Courier font indicates a command keyword or operand that youare expected to type exactly as shown.❚Italic Courier font indicates a command operand that you mustreplace 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 commandand then pressing <Return>.❚Two or more keys that must be pressed simultaneously are shown in textlinked with a plus (+) sign: <Ctrl>+C.
AirLink Pro 64S Installer’s GuideAbout This ManualRev. B - 2/97 xviiNotes, Cautions, and WarningsNOTE The standard text note highlights important or additionalinformation for you to consider.CAUTION These notes warn you of situations that could result in damageto your equipment or loss of data if you do not heed theinstructions.WARNING These notes warn you of situations that could endanger yourpersonal health if you do not heed the instructions.Customer SupportIf after reading this guide you encounter any trouble installing or using theAirLink Pro 64S, please contact your local distributor. Cylinkdistributors are authorized local service providers and are responsible forimmediate support. If problems are not resolved, you can call Cylink’sCustomer Service for assistance. A 24 hour answering service is maintained forafter hours emergency telephone technical support. Emergency requests forphone support are dispatched by the answering sevice. Cylink Technicalsupport responses to emergency calls consist of over the phone troubleshootingand assistance in obtaining distribution support. The telephone numbers are:Domestic (USA)1-800-545-6608 Sunnyvale, CAInternational1-408-735-5822 Sunnyvale, CA+65-297-6196 Singapore+44-1256-58122 United Kingdom+91-11-301-0090 India+92-21-215-7264 Pakistan
AirLink Pro 64S Installer’s GuideAbout This Guidexviii Rev. B - 2/97Domestic and International Customer Service Fax1-408-735-6641 Sunnyvale, CA+65-297-6195 Singapore+44-1256-24156 United Kingdom+91-11-379-3584 India+92-21-587-0065 PakistanYou can also contact Cylink’s Tech Support through the Internet at thefollowing address:support@cylink.comIf you need to return equipment, call Customer Service to obtain a ReturnMaterial Authorization (RMA) number prior to returning the equipment. TheRMA number must be placed on the outside of the shipping carton. Please beprepared to provide the unit serial number, software version, and a detaileddescription of the problem. Return all equipment to:Cylink Corporation910 Hermosa CourtSunnyvale, CA 94086Attn: Repair and Return DepartmentRMA No: xxxxxxxxxxReader ResponseCylink’s Technical Publications Department wants its documents to meet yourrequirements. 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 tosubmit your comments toManager, Technical PublicationsCylink Corporation910 Hermosa CourtSunnyvale, CA 94086You may also submit your comments through the Internet at the followingaddress:techpubs@cylink.comCylink may use or distribute any of the information you supply in any way itbelieves appropriate without incurring any obligations whatsoever.
Rev. B - 2/97 1-1CCHAPTER HAPTER 11Product DescriptionProduct DescriptionThis chapter introduces the AirLink Pro 64S and provides an overviewof the features and capabilities.Inside this chapter:Introduction to the AirLink Pro 64S................................1-2Features and Capabilities ...................................................1-3
AirLink Pro 64S Installer’s GuideProduct DescriptionRev. B - 2/971-2Introduction to the AirLink Pro 64SThe AirLink Pro S-Band family of digital microwave radios are spread-spectrum transceivers that operate in the 2400 - 2483.5 MHz IndustrialScientific Medical (IS) band. The AirLink Pro 64S uses a Spread Spectrummodulation technique to create high-quality, point-to-point and point-to-multipoint radio links between itself and other AirLink Pro 64S modemslocated at distant sites.The AirLink Pro 64S is a compact table top unit (see Figure 1-1), which can alsobe rack mounted.Figure 1-1AirLink Pro 64S- Full View
AirLink Pro 64S Installer’s GuideProduct DescriptionRev. B - 2/97 1-3Features and CapabilitiesThe AirLink Pro 64S supports a range of sophisticated control capabilities andoptions, 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 radioregulations)❚Local and remote monitoring, diagnostic, and maintenance capabilities❚Every radio-frequency (RFD) burst verified by an error-checking algorithm❚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 EnclosureIn a typical redundant installation, an AirLink Pro 64S operates in a point-to-point or point-to-multipoint environment. In a point-to-point setup, there is onemaster and one slave modem linked by radio. The master modem is the burst-timing synchronizer of the radio link. The master sends a timing code to theslave with transmission bursts. Once the slave receives a complete burst, itturns on its transmitter and transmits its burst. This scheme provides a full-duplex, radio-to-radio communication that follows a Ping-Pong analogy.
AirLink Pro 64S Installer’s GuideProduct DescriptionRev. B - 2/971-4Figure 1-2Point-to-Point Application Showing Master/Slave ConfigurationIn a point-to-multipoint setup, the Pro 64S modems provide a radio linkbetween a host computer and two or more remote terminals. The terminals arecontrolled by the host with a poll-select communication protocol that istransparent to the AirLink modems. In this case, polling is the process ofaddressing the remote terminals by the host computer’s software. The mastermodem is the burst-timing synchronizer of the radio link. The master sends atiming code to the slave with transmission bursts. The slave synchronizes tothis timing reference and sends transmission bursts back. This scheme providesa 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 theAirLinks while transferring data to another.Figure 1-3Point-to-Multipoint Application
AirLink Pro 64S Installer’s GuideProduct DescriptionRev. B - 2/97 1-5AirLink Pro 64S AntennaThe antenna choices can include an 8 dBi Omnidirectional antenna or a 24 dBisemi-parabolic Directional antenna. Refer to the AirLink Site Planning Guidefor different antenna options.Network Management PortsThe AirLink Pro 64S ASCII terminal user interface is an RS-232 interface thatallows a terminal device or personal computer to control and monitor AirLinkPro 64S operation at either end of the link. The connection to the RS-232interface can be either a direct connection (device to port), or an indirectconnection (device to modem to port).Programmed Configuration ParametersThe AirLink Pro 64S operation is governed by user-selectable configuration andcontrol parameters that reside in the non-volatile memory of the unit. Theseparameters are displayed and controlled through a terminal device that canaccess both the local and remote unit. When power is lost and then restored,the system reconfigures itself from its protected configuration database.Refer to Chapter 3, Configuration, for more information on changingconfiguration parameter settings.A long-life lithium battery protects all system configuration settings duringpower losses. The battery is integrated into the non-volatile memory /real-time clock circuitry on the digital module in the AirLink Pro 64S. It has a 10-year storage life (in the absence of Power to the AirLink Pro 64S). However, abattery about to expire will result in loss of all configured parameters andrevert back to the default configurations.WARNING The component containing the lithium battery is NOT a customer-replaceable part. Do notexpose the lithium battery cell by opening the component. Do not attempt to recharge thebattery. Do not dispose of the component by fire. The lithium battery could explode ifmistreated.Monitoring and Diagnostic CapabilitiesThe AirLink Pro 64S system constantly monitors the quality of the wirelesslink, checking the receive RFD signal level, bit errors, and many other criticalfactors. This information goes into an internal database of status andperformance information that the AirLink Pro 64S uses, in part, to derive the
AirLink Pro 64S Installer’s GuideProduct DescriptionRev. B - 2/971-6events that are stored in the event queue. As alarm events occur, they aresignaled through indicators on the front panel of the modem and are entered inthe event queue.Using the terminal user interface, you can query either the local unit or theremote unit for status, performance and alarm information, and makeconfiguration changes for either the local or remote end of the link.The AirLink Pro 64S also provides built-in bit error testing and loopback teststhat may be used to isolate problems. You can initiate tests in the local unit orin the remote unit through the terminal user interface.Refer to Chapter 4, Operations and Maintenance, for information on monitoringoperation and using diagnostic tools and procedures.AirLink Pro/AirLink One CompatibilityAirLink Pro 64S modems are designed to operate in the same environments asAirLink One modems. They are compatible in the sense that adjacent linksemanating from a Hub Site can be implemented using different generations ofAirLink modems. However, due to different burst structures in the TDD over-the-air protocol, an AirLink Pro 64S modem cannot communicate in the samelink with an AirLink One 64S modem.There are compatibility issues to consider when AirLink Pro 64S and AirLinkOne modems are configured together to avoid mutual interference.❚Burst Synchronization❚Radio Frequency EnvironmentThe considerations necessary for Burst Synchronization are discussed inChapter 2, Installation and System Administration in the BurstSynchronization Section.The AirLink Pro 64S has two commands, RF Plan and Range, that must beconfigured for AirLink One compatibility. These commands are discussed inChapter 3, Configuration in the Configuring the RF Link section.
Rev. B - 2/97 2-1CCHAPTER HAPTER 22InstallationInstallationThis chapter outlines general planning and the procedures forunpacking, and installing the AirLink Pro 64S hardware, connectingcables, and performing power-up checks. This chapter also containsimportant instructions regarding safety in setting up the AirLink Pro64S system.Inside this chapter:Overview .................................................................................2-2Unpacking ...............................................................................2-2Identifying Physical Features ............................................2-3Site Preparation...................................................................2-5Setting Up the System .......................................................2-6Checking Operation ...........................................................2-28
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/972-2OverviewThis chapter touches briefly on the general technical requirements of antennaand RF transmission line installation, but mainly focuses on the task ofinstalling the AirLink Pro 64S system at each end of the communication link,integrating all of the equipment, and performing a system check and alignmentbefore 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 componentsDepending upon your system plan, you will be installing all or some of theseAirLink Pro 64S system components at each end of a link. The following sectionsdescribe both required and optional system components.UnpackingThe first step in the installation process is to take all of the materials out ofthe shipping carton(s) and make sure that you have everything shown on thepacking list(s). If something is missing, contact your local distributor. Inspectthe unit for any possible damage. If you discover shipping damage, repack theunit and notify the shipping representative.NOTE Save the shipping cartons and packing materials. You will need the carton and materials ifyou ever need to ship your equipment elsewhere.After unpacking and confirming the contents of the shipment, place the AirLinkPro 64S system components on a flat surface that allows enough space to workaround them.
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/97 2-3Identifying Physical FeaturesFigure 2-1AirLink Pro 64S Front PanelFront PanelThe AirLink Pro 64S front panel (Figure 2-1) consists of a metal panel thatcontains two clusters of indicators identified with graphical icons and labels.The two clusters have four indicators each. Table 2-1 lists the front panel LEDsand describes their functions.
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/972-4Table 2-1AirLink Pro 64S Front Panel IndicatorsName Color FunctionDCD Green When ON, indicates that a good data communicationschannel has been establishedRTS Green Indicates that RTS is asserted internally or externally.TD Green Indicates that the unit is transmitting data (in the formof ones) to the far-end unit.RD Green Indicates that the unit is receiving data (in the form ofones) from the far-end unit.Major Alarm Red When ON, indicates that one or more of the followingevents has occurred:-Transmit Power Below Threshold- DTE Interface Voltage Error- Radio Sync Loss- System Reset- No Burst Sync SourceMinor Alarm Yellow When ON, indicates that one or more of the followingevents 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 ExceededBurst Sync Green When ON, indicates that the unit is the burst syncsource.Power Green Indicates that primary power is supplied to theequipment.Rear PanelThe AirLink Pro 64S rear panel (Figure 2-2) consists of a metal panel containingtwo external equipment connectors, one terminal block, an AC power connectorand an N-type antenna connector. Table 2-1 lists the rear-panel connectors anddescribes their functions.
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/97 2-5Figure 2-2AirLink Pro 64S Rear PanelTable 2-2AirLink Pro 64S Rear Panel ConnectorsConnector Type FunctionPower 5-pin DIN female Power connection.Antenna N-type female Antenna connectionNetwork ManagementPorts DB 9 maleconnectors For connecting a modem or terminal to theAirLink Pro 64S.DTE DB 25 female forRS-232 interfaceDB 25 female forV.35 and EIA-530DTE connection(Note: These are DCE emulating ports.)Burst Sync 6-Pin Captive WireTerminal Burst Sync ConnectionSite PreparationBecause of the special planning requirements associated with installing amicrowave system, you should review some of the general guidelines regardinginstallation preparation to ensure that the site you are considering is suitableto the purpose. For details on Site Planning, refer to the AirLink Site PlanningGuide.General Physical and Environmental CharacteristicsThe AirLink Pro 64S radio unit measures 8.3 inches wide (21.083cm), 2.6 incheshigh (6.60cm), and 10 inches deep (25.4cm), and weighs approximately 5 pounds(2.3 kilograms).
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/972-6Lightning ProtectionIf the AirLink Pro 64S system is being installed in an area where lightning is aproblem, primary protection, such as gas tubes or spark gaps, is required (Cylinkdistributors can provide these). For more details on lightning protection refer tothe AirLink Site Planning Guide.Power RequirementsThe AirLink Pro 64S Power Specifications are listed in the table below.Table 2-3Voltage RequirementsParameter SpecificationsExternal AC power Supply Input Output100-250 VAC @ 50/60 Hz+5, +/- 12 VDC, cable terminated with 5-pinmale DIN ConnectorMaximum Power consumption(Power Supply plus AirLink) AC Power Supply - 23WDC Power Supply - 21WNOTE Power supplies are available as options from Cylink and distributors.Setting Up the SystemThe following sections outline the procedures for installing, cabling, andbringing up an AirLink Pro 64S system. Some of the steps require specialknowledge, experience, and tools; some of the installation steps may requirehelp from another person.Installing the AntennaAntennas are generally installed by persons who have the knowledge,experience, and tools to handle the somewhat specialized task. The followingsections are intended as a general summary of the process, and not as a completedescription. A successful antenna installation effort is the culmination of siteand route preparation and path analysis. For a detailed description of PathAnalysis and antenna options refer to the AirLink Site Planning Guide .
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/97 2-7Typical Antenna MountsAn antenna for a microwave system such as the AirLink Pro 64S is typicallyequipped with mounting hardware that allows the antenna to be attached to alength of pipe (or stub mast) that can then be mounted in several ways,depending upon user requirements, site conditions, and local building codes (seeFigure 2-3).Figure 2-3Typical Antenna MountsSystem GroundingDirect grounding of the antenna, mast, and tower provides some protectionagainst lightning strikes and static buildup. A direct electrical connectionshould be made to a suitable grounding rod at the base of the tower or mast using
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/972-8at least one-inch wide copper grounding strap, or its equivalent, and non-corrosive hardware. For details and safety standards, consult the appropriateelectrical code or a similar document. Use lightning arrestors in appropriateplaces.Aligning the AntennaIn order for an AirLink Pro 64 pair to operate correctly, the local antenna andthe remote antenna must be aligned so that the signals from one antenna areaimed directly at the center of the other antenna. Correct antenna alignmentmaximizes the signal received at both ends of the radio link. The antennaalignment 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. Thisincludes power, DTE, and Network Management port connections.Installing the AirLink Pro 64SConnecting the Antenna CableTo connect the antenna cable to the AirLink Pro 64S:1. Locate the N-type connector on the rear panel of the AirLink Pro 64S (seeFigure 2-2).2. Plug the RF cable connector firmly into the N-type jack connector and hand-tighten the cable connector shell onto the jack connector collar.3. Verify that the cable connector is seated securely and that the cable is notkinked.DTE Line Connection1. 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 forthe 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.3. Ensure that the cable is securely held by the connector.
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/97 2-9Connecting the PowerThe 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 groundedelectrical outlet.WARNING To avoid the danger of electrical shock or power loss, ensure that the power cord issecurely seated in the receptacle on the modem. This equipment is designed to work withelectrically grounded systems. The product’s AC power cord ends in a three-polegrounding plug. Do not use a three-pole to two-pole adapter with the plug. Verify thatthe outlet you intend to use is properly installed and grounded; the outlet used mustcomply with the local electrical code for the country it is installed in. To ensure yoursafety, 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 asimple ASCII terminal or personal computer can be connected via port #2 tomonitor and configure the AirLinks operation.Figure 2-4Terminal Connection to the AirLink Pro 64S
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/972-10NOTE The Network Management ports are “wired” as DTE (Data Terminal Equipment). Thisallows for a standard “straight through” cable connection for any modem (modems arewired as DCE Data Communications Equipment). Since the terminal or PC and the NetworkManagement ports are “wired” as DTE, the user must supply a “null modem” cable whenconnecting 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 aterminal in order to perform antenna alignments. Further information onterminal usuage for setting each link parameter will be discussed in later inthis Chapter.Before connecting the ASCII terminal to the unit, configure the terminal withthe following parameters:Terminal Mode = VT100Column = 80Autowrap = ONMonitor Mode = OFFCursor Keys = NormalNewline Mode = ONCharacter Set = DEC SupplementalKey Code = ASCIIBreak key = ONMinimum Break Length = 2 character times (17 msec.)Data/Parity = 8/No ParityStop Bits = 1Transmit Rate = 19200, 9600, 4800, 2400, or 1200 bpsAuto Answerback = OFFComm = FDX (No Echo)RS232 Data LeadsLocal Echo = OFFTo connect the terminal, follow these steps:1. Connect the terminal (or a computer in terminal emulation mode) to theNetwork 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 featurethat automatically attempts to detect the operating baud rate of the attachedterminal device.3. Press <Break> then <Return> on the terminal keyboard.
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/97 2-11Pressing <Break> at the terminal puts the AirLink Pro 64S terminal interfacesoftware 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 operatingbaud rate by starting at 19200 bps and dropping to the next lower speed in thesequence for each press of the <RETURN> key until it recognizes a <Return>character. When the software detects a <Return> character, it displays theAirLink 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. Ifthe prompt does not appear, press <Break>once, then press <Return>repeatedly at one second intervals until the AirLink Pro 64S prompt appears. Ifthe prompt doesn’t appear after pressing <Return> six times, press <Break>and try again.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 serialcommunication port (com1 or com2) of the computer must be connected to either ofthe two Network Management Ports on the rear panel of the unit. There areother communication software packages like Procomm™ that can be used toemulate a dummy terminal. The instructions given below are a guide to usingthe Microsoft Windows terminal emulation software.Using the mouse buttons double click on the ACCESSORIES icon under theProgram Manager of Windows. Double click on the TERMINAL icon. Pull downthe menu under Settings near the top of the screen, and single click on TerminalEmulation. Select DEC VT-100 [ANSI] (see Figure 2-4 ) then single click on OK.Figure 2-5Terminal EmulationNow go back to settings and single click on Terminal Preferences, and set up theterminal parameter as follows:
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/972-12Figure 2-6Terminal PreferencesSingle click on OK to enter any changes made to these settings or click on Cancelto exit without change. While remaining under Settings, select Communicationsand set up the serial port as follows:
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/97 2-13Figure 2-7CommunicationsThis software works best at data rates of 4800 baud or lower. To change thebaud 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 andmatch the baud rate of interface with the baud rate of the terminal.Configuration of the Serial Communication PortGo 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 iconwhich shows the normal or default settings for the mouse, keyboard, and serialcommunication ports. Double click on the PORT icon, then select thecommunication port number that will be displayed (See Figure 2-7).
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/972-14Figure 2-8PortsFor example: Single click on COM1 (communications port 1), then click onSettings. The current settings of baud rate, data bits, parity, stop bits, and flowcontrol are displayed for com1.Figure 2-9Settings for Com1A single click on ADVANCED will display the advanced settings of thecommunication port which are Base I/O Port Address and IRQ Line (Interruptsetting).
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/97 2-15Figure 2-10Advanced Settings for Com1For most applications the default settings for both the COM1 and COM2 are asfollows.Serial Port Base address Interrupt Request Line (IRQ)COM1 0X3F8 4COM2 0X2F8 3Single click on OK to enter any changes made to these settings or click on Cancelto 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 thecomputer is running an application software it is very important that all theinterfaces and communication ports be set up correctly. If a laptop or a personalcomputer does not have a mouse you can choose or select specific settings withineach menu by pressing the tab key repetitively to move through each option.Pressing <TAB> + < CURSOR> keys will allow you to step through eachoption and make changes as required.A terminal device or a personal computer may have specific data cablingrequirements (refer to Appendix B, Specifications, for connector pinassignments), and usually requires a grounded alternating current power outlet.In a hub installation involving a number of AirLink Pro 64S pairs, the terminaldevice can be “shared” across all the AirLink Pro 64S systems by using aterminal switching device.Remote Modem ConnectionA remote terminal or personal computer can be connected to NetworkManagement Port #1 on the rear panel of the AirLink Pro 64S unit through amodem (see Figure 2-11). A modem typically requires a dedicated telephoneline with a modular RJ-11 jack as well as a source of power, usually a standard115 VAC or 230 VAC grounded outlet.
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/972-16NOTE 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 auxiliaryequipment, like a terminal or computer.Figure 2-11Modem Connection to the AirLink Pro 64SBatch File HandlingThe user can configure the unit by executing commands through a batch file. Theuser needs a Windows terminal emulator or a serial communications packagesuch 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 theuser verify the proper execution of GET and SET commands manually beforeexecuting 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.
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/97 2-174. Select option # 5...delay between lines...suggested value: 100 (Esc gets youout 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 secDelay between lines : 25/10 sec5. From the Transfer menu select Send Text File. Enter the name of the textfile 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 commandwill be followed by the unit’s response based on whether the command wasexecuted. If the terminal program sends a command to the local unit before thelocal unit is ready for the next command, the command may be dropped.Burst SynchronizationWhen you have either a hub configuration or a repeater site (more than oneAirLink unit operating from the same central site), one of the units must be setup as the source for burst synchronization. Refer to Chapter 3, Configuration,for Hub and Repeater settings.
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/972-18Burst Sync Signal DescriptionThe Burst Synchronization signal is used by AirLink Modems in Hub andRepeater applications to synchronize two or more modems to a commonreference. Two types of synchronization are required: transmit burst and bittiming synchronization. These two components are necessary to align thetransmit bursts, and to ensure that an exact number of user data bits aregenerated every 8.5 millisecond Time-Division-Duplex (TDD) frame. If thiswere 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 atransmit burst followed by a receive burst, in an 8.5 millisecond frame. In orderto minimize interference between adjacent links, it is necessary to ensure thatall of the transmit bursts emanating from the hub site occur simultaneously.This is accomplished by providing a bussed burst synchronization signal (seeFigure 2-12) to all modems at the hub site. The signal has a complex structurethat has two components. The first component is characterized by wide pulses,which occur at 8.5 millisecond intervals. They are used by the AirLink modemsto trigger the transmit bursts and ensure the necessary time alignment. Thesecond component is characterized by short pulses, which occur at an 8 kHzfrequency. The pulses serve as phase reference for the AirLink modem internaloscillator, which ensures bit timing synchronization between the modems.Figure 2-12Burst Synchronization StructureTime-Division-Duplex (TDD) Burst Structure DescriptionThe TDD over-the-air protocol used by the AirLink Pro 64S modem is designedto provide the transport mechanism for the full-duplex user data, as well as aseparate communication channel for the remote command and status capability(see Figure 2-13). The burst structure is shown in the figure below. This figure
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/97 2-19depicts the format of a single burst, however two such bursts, a transmit and areceive burst, are required to form a complete TDD frame. Each burst isapproximately 4 milliseconds long, which is about 40% of the TDD frametime. The two bursts together take up 80% of the frame time, and the unused20% is called the guard time, which is necessary to allow for the two-waypropagation delay between the two modems that form a link.The burst is shown to be composed of five components. The Preamble (PA) is thefirst part of the burst. It is necessary to allow the receiving modem circuitry tore-acquire synchronization to the transmitting modem. The receiver must re-acquire sync for each burst since it will drift in frequency slightly during thetime 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 ofthe payload data to the receiver. Once the receiver detects this pattern, it canimmediately begin recovering the remaining three components. The thirdcomponent is the inter-processor communication channel (COMM). This channelprovides a 1 kbps full duplex communication link between the embeddedmicroprocessors in the AirLink Pro modems. The channel is used to communicatecommands and to request and receive status information over the RF link. Thefourth component is the data payload (DATA), which provides a maximum 64kbps full duplex communication channel for the user’s data. The user’s data iscarried unmodified in this burst structure, making the AirLink modem’s DTEinterface protocol-independent. Finally, the fifth component is the Cyclic-Redundancy Check error detection code. This 16-bit code is computed on thetransmit side, and checked on the receive side, once for every burst. When blockerrors are detected they are counted, and are reported by the microprocessor.Figure 2-13TDD Burst Structure
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/972-20Installing Burst Sync WiringBurst synchronization minimizes near-end inter-channel interference among theunits in a hub configuration; all the hub units are synchronized in order totransmit and receive at the same time. The burst synchronization system isimplemented with a dual external bus. Each bus consists of a differential pairof wires, driven by a tri-stateable RS-485-type device. When multiple modemsare to be synchronized, they should be interconnected via a color coded four-wire cable. Each modem has six jacks that are electrically identical tofacilitate this interconnection.The equipment should be physically located as shown in Figure 2-14. TheReference and backup masters should be the first units in the chain. Figure 2-14illustrates the connections needed for Burst synchronization at a hub site wherethe A bus is used. The Reference master is the burst sync signal source, providingit for the three Subordinate master units. If the distance between the Referencemaster and the last Subordinate master is greater than 100 ft, the burst syncbus(es) should be terminated at the last subordinate master. The termination isdone with a 100 ohm resistor (internal to AirLink) as shown in Figure 2-15. Youshould ensure that that the Termination is at one end of the daisy chain andthe Burst sync source is at the opposite end. Care should also be taken not to usemultiple terminations.Figure 2-14Burst Sync WiringBurst Sync Fail-Safe FeatureThe AirLink Pro provides for a burst synchronization backup scheme which usestwo buses. These are referred to as the "A" bus and the "B" bus. Use of thebackup burst synchronization bus is optional. To use the backup feature, one ofthe two buses is designated as the primary burst synchronization bus and theother is designated as the backup burst synchronization bus. One of the units ata hub site is selected as the "Reference Master", and a second unit is selected as
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/97 2-21the "Backup Master." All other units at the hub are designated as"Subordinate Master." The burst synchronization signal on the primary bus isprovided by the Reference Master unit. When activity is lost on the primarybus, implying that the Reference Master has failed to provide the burstsynchronization signal, the modems will use the backup burst synchronizationsignal provided by the Backup Master unit. When activity is again detected onthe primary bus, the burst synchronization signal on this bus is used.Figure 2-15Burst Sync BackupThe Burst Sync LED is ON for the unit providing the burst synchronizationsignal; 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 synchronizationsignal. When only a single burst synchronization bus is used, the loss of theburst synchronization signal triggers a Major Alarm. The Major Alarm LED isturned ON, and an alarm message is generated in the event log. When bothburst synchronization buses are being used, and both primary and backup burstsynchronization signals are lost, a Major Alarm is generated. The Major AlarmLED is turned ON, and an alarm message is generated in the event log. If eitherthe primary or backup burst synchronization signal is lost, a Minor Alarm isgenerated. The Minor Alarm LED is turned ON, and an alarm message isgenerated in the event log.To configure all the units at a primary hub site to use the primary burstsynchronization bus only, follow these steps:1. Designate one unit to be the Reference Master unit. Type
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/972-22AIRLINK PRO 64S> set application 42. Designate all the other units to be Subordinate Master units. For each unit,typeAIRLINK PRO 64S> set application 63. To designate a single burst sync system, at each unit in the hub, typeAIRLINK PRO 64S> SET HUB_SYNC SINGLE4. Wire the units as shown in Figure 2-14.To configure all the units at a primary hub site to use the backup burstsynchronization feature, follow these steps:1. Designate one unit to be the Reference Master unit. For this unit, typeAIRLINK PRO 64S> Set Application 42. Designate a second unit to be the Backup Reference Master unit. For thisunit, typeAIRLINK PRO 64S > Set Application 53. Designate all the other units to be Subordinate Master units. For each unit,typeAIRLINK PRO 64S> Set Application 64. To designate a dual burst sync system, at each unit in the hub, typeAIRLINK PRO 64S> SET HUB_SYNC DUAL5. Wire the units as shown in Figure 2-15.To configure units in a secondary hub site, all the above steps apply except thateither a Slave modem in a point-to-point link or a Slave modem in a point-to-multipoint link is used in place of the Reference Master unit.Normal Operation of Backup Burst SynchronizationThe Backup Burst synchronization scheme is used in hub and repeaterconfigurations. The burst synchronization signal is provided on two buses, Bus Aand Bus B. The primary burst sync signal is provided by the Reference Masterunit on Bus A. The Backup Burst Synchronization signal is provided by theBackup Master unit on Bus B.
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/97 2-23Table 2-4Normal Burst Sync ActivitySource ReactionReference Master Provides burst sync signal on Bus AUses own burst sync signalBurst Sync Source LED is ONBackup Master Provides burst sync signal on Bus BUses burst sync signal from Bus ABurst Sync Source LED is OFFSubordinate Master(s) Uses burst sync signal on Bus ABurst Sync Source LED is OFFActivity Lost on Bus A OnlyThis condition occurs if the Reference Master unit malfunctions or the burst syncconnection on Bus A is broken. It is detected by all units at the hub except for theReference Master unit. The Reference Master unit cannot monitor its own burstsync status. The technician should power down the Reference Master Unit orremotely enable its “RF Sleep” command, until the problem is located. It maystill be transmitting and can cause near-end inter-channel interference since allother units are using a different burst sync signal.Table 2-5Bus A Activity LostSource ReactionReference Master Uses own burst sync signalBurst Sync Source LED is ONBackup Master Provides burst sync signal on Bus BUses own burst sync signalBurst Sync Source LED is ONMinor Alarm LED is ONEvent Queue contains “Primary BurstSync Source Loss” messageSubordinate Master(s) Uses burst sync signal on Bus BBurst Sync Source LED is OFFMinor Alarm LED is ONEvent Queue contains “Primary BurstSync source loss” messageActivity Lost on Bus B OnlyThis condition occurs if the Backup Master unit malfunctions or the burst syncconnection on Bus B is broken. It is detected by all units at the hub except for theBackup Master unit. The Backup Master unit cannot monitor its own burst syncstatus.
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/972-24Table 2-6Bus B Activity LostSource ReactionReference Master Provides burst sync signal on Bus AUses own burst sync signalBurst Sync Source LED is ONMinor Alarm LED is ONBackup Master Uses burst sync signal on Bus ABurst Sync Source LED is OFFSubordinate Master(s) Uses burst sync signal on Bus ABurst Sync Source LED is OFFMinor Alarm LED is ONEvent Queue contains “Backup BurstSync Source Loss” messageActivity Lost on Bus A and Bus BTable 2-7Bus A and Bus B Activity LostSource ReactionReference Master Uses own burst sync signalBurst Sync Source LED in ONMinor Alarm LED is ONEvent Queue contains “Backup BurstSync Source Loss” messageBackup Master Uses own burst sync signalBurst Sync Source LED is ONMinor Alarm LED is ONEvent Queue contains “Primary BurstSync Source Loss” messageSubordinate Master(s) Burst Sync Source LED is OFFMajor Alarm LED is ONEvent Queue contains “No Burst SyncSource” message
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/97 2-25Burst Synchronization Compatibility with AirLink One ModemsThe AirLink Pro 64S uses a burst synchronization signal that is compatible withthe signal used in the AirLink One S-band 64kbps, 128kbps, and 256kbps modelsand AirLink One L-band models. A hub configuration may contain both AirLinkPro and AirLink One units. AirLink One units, however, cannot take advantageof the backup burst synchronization feature. For the burst synchronizationsignal, the AirLink One models use a different connector and cable than thoseused on the AirLink Pro 64S. The following section describes the procedure tosuccessfully connect AirLink Pro and AirLink One units for burst synchronizationin 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 Cylinkdistributors).The RS232 and RS422 terminal block converter, Telebyte Model number 285M,must be properly configured before use. A two position switch accessible fromthe top of the unit should be set to the “DCE” position. Also, the five positiondip switch next to the terminal block should have the following settings: SW1through SW4 open, and SW5 closed.Figure 2-16Burst Sync Compatibility (AirLink One unit providing Burst Sync)
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/972-26AirLink One Unit Providing Burst Synchronization Signal1. Connect the BNC cable marked “SEND” of the RS232-to-BNC converter tothe "SYNC" connector of the AirLink One.2. Connect the DB25 female end of the RS232-to-BNC converter to the DB25male 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 provisionsfor two pairs of wires. One pair is used when the AirLink One unit is generatingthe burst synchronization signal to the other units in the hub. The other pair isused 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 theterminal 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 theterminal block and the other end to the AirLink Pro unit's "-A" terminal.AirLink Pro Unit Providing Burst Synchronization Signal1. Connect the BNC cable marked "RECEIVE" of the RS232-to-BNC converterto the "SYNC" connector of the AirLink One.2. Connect the DB25 female end of the RS232-to-BNC converter to the DB25male end of the RS232-to-RS422 converter.3. Connect one end of a single wire to the designated "R+" terminal of theterminal 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 ofthe terminal block and the other end to the AirLink Pro unit's "-A"terminal (see Figure 2-15).
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/97 2-27Figure 2-17Burst Sync Compatibility (AirLink Pro unit providing Burst Sync)
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/972-28Checking OperationAt start-up an AirLink Pro 64S pair will attempt to:❚establish the radio link between the two radio units, and❚begin transferring dataWhen each radio unit is powered up, it performs a power-on self-test thatdetermines whether the unit’s hardware and software are operating withinthe required limits. When the test succeeds, the designated master unit beginstransmitting, in an attempt at establishing an RF link with the slave unit.Power-up LED SequenceThe boot-up process consists of the unit performing several self-tests (describedbelow). All LEDs will light at one time or another, so this is a visual checkthat they are all working. The boot-up time, defined as the time for the unit tocomplete the boot-up process, is 15 seconds.All the LEDs light up when Xilinx is loaded successfully.Table 2-8LED IndicatorsIndicator SignifiesRD EPROM ChecksumTD Xilinx EPROM ChecksumRTS LED NVRAMDCD Configuration databases arecheckedHardware initializationPower LED Power is onBurst Sync Source Boot up is successfulMinor Alarm LED RAM test in progressMajor Alarm LED Xilinx loading in progressIf a unit is powered up with the factory default configuration, the followingLEDs are ON when the unit successfully completes the boot-up process: Power,
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/97 2-29Burst Sync Source, RD and TD. A few seconds later, the Major Alarm LED comesON, followed by the Minor Alarm LED.Error CodesWhen an error code is detected, a message is entered into the AirLink Pro 64SError Code Queue. If the RAM Test fails then the Minor Alarm LED stopsflashing and the Burst Sync LED lights up. If Xilinx loading fails, the MajorAlarm LED remains lit while the other LEDs are off. If the EPROM Checksumtest, the Xilinx EPROM test or the NVRAM test fails, then the correspondingLED remains lit. Refer to Table 2-7 for Error Code Definitions. In suchsituations you are advised to call your local distributor or Cylink CustomerSupport.Table 2-9Error CodesMessage DescriptionMinor Alarm LED is OFFBurst Sync LED is ON RAM test failed.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 willautomatically void the warranty. For out of warranty situations this usually increases thecost of repair significantly.Initial Unit ConfigurationBecause all AirLink Pro 64S units leave the factory configured as slave units ina 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 beMaster Unit in a Point-to-Point Link.In a new hub installation, the units at the hub must all be masters, and thecorresponding remote units must be slaves. At a hub, set up each individual linkfirst as a point-to-point link and then align each link separately with all theother AirLink Pro 64S units turned off. After all the link pairs have been
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/972-30configured and aligned as point-to-point links, you can then changeconfigurations 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 pairshave been configured and aligned as point-to-point links, you can then changeconfiguration for repeater operation.Each type of application has been assigned a specific number for configurationpurposes. 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 beenconfigured and the antennas aligned, all system configuration must be doneindividually at each unit. Once there is a radio link between the units of anAirLink Pro 64S pair, the remote unit can be configured from the local site acrossthe 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 describedin “ Terminal Connection,” earlier in this chapter.2. Type the following command at the prompt:AIRLINK PRO 64S> set application 2The text you type is shown in boldfaced type; be sure to include spaces asshown.3. To verify the configuration change, type the following command at theprompt:AIRLINK PRO 64S> get configurationThe terminal displays the configuration of the unit, similar to thefollowing:AIRLINK PRO 64S> Get ConfigurationSite Name:Application: 2. Master Unit in a Point-to-Point LinkPN Code: 1RF Channel Plan: 20 channelsRF Channel: 1RF Frequency: 2404.468
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/97 2-31RF Power: 0 dBmRF sleep: NOComm Mode: SynchronousData Rate: 64 KbpsBurst Timing: Free RunTx Clock Source: InternalTx VCXO Reference Free RunHub Sync: SingleRTS Source: InternalRTS delay: 0 msecDTE mode: RS-232DTE Protect: DisabledAlarm Reporting: immediateAlarm Level: StatusDate/Time: 10 Sept 1996 10:35:00NOTE Depending upon your AirLink Pro 64S installation, you may need to alter moreconfiguration values in order to ensure correct operation. Refer to Chapter 3 for moreinformation on configuring the AirLink Pro 64S.Aligning the AntennaAfter the link pair has been turned on and configured, the antennas must bealigned. Because most AirLink Pro 64S paths will be line-of-sight paths, theinitial antenna alignment can be done visually. In most cases, this roughalignment will be sufficient to allow the radio units to acquire radiosynchronization 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 onPins 1 and 25 of the RS232 DTE interface connector) on the rear panel ofAirLink 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 surethat 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 performancecommands to check the receive signal quality (RSQ). You should be able toobtain 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 basedon the path calculations. (For more information about the RSSI value, seepage 3 of Chapter 4). See the table below for correspondence between
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/972-32measured voltages and receive signal quality (see Table 4-1 in Chapter 4 toview the Receive Signal Quality table).Table 2-10Signal QualitySignal Quality RSSI Voltage RangeGood 8.5 - 10.0 VBad < 6.03. Type the following command at the AirLink Pro 64S prompt:AIRLINK PRO 64S> get statusThe system displays a list of status information similar to the following:AIRLINK PRO 64S> get statusSite Name:Test in Progress: NoneDTE Status: RS-232Radio Sync Loss: NoBurst Sync Loss: NoRSSI: -60.0 dBmRSQ: 9.0VSWR N/ADate/Time: 10 Sept 1996 10:37:094. Type the following command at the AirLink Pro 64S prompt:AIRLINK PRO 64S> get performanceThe system displays a list of status information similar to the following:AIRLINK PRO 64S> get performanceSite Name: Sunnyvale 2QRSS BER: Unavailable1HR ES: 11HR UAS: 124 HR ES: 224 HR UAS: 3RSQ: 9.0Date/Time: 10 Sept 1996 10:38:00The Receive Signal Quality (RSQ) is a figure of merit that is normalized on ascale of 1 to 10, and is a function of the receive signal-to-noise and signal-to-interference ratio. A very strong signal that is severely corrupted with
AirLink Pro 64S Installer’s GuideInstallation and System AdministrationRev. B - 2/97 2-33interference results in a normal receive signal level indication (RSSI) and a lowRSQ number.Assuming that the path to and from the AirLink Pro 64S unit is okay, theAirLink One is prepared to pass data. If you need to alter other configurationvalues, refer to Chapter 3, Configuration,
Rev. B - 2/97 3-1CCHAPTER HAPTER 33ConfigurationConfigurationThis chapter describes how to use the AirLink Pro 64S command lineterminal user interface to set and change configuration parameters.The information in this chapter includes descriptions of all theAirLink Pro 64S configuration commands and options, and lists thedefault configuration settings.Inside this chapter:Overview .................................................................................3-2Using the ASCII Terminal Interface .................................3-2Setting Administrative Parameters ..............................3-10Setting Link Parameters ..................................................3-12Setting Alarm Control Parameters ..............................3-22Setting Modem Parameters.............................................3-2?Other Command Keywords and Operands....................3-2?
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/973-2OverviewYou configure the AirLink Pro 64S by connecting an ASCII terminal or a personalcomputer to the Terminal port of the AirLink Pro 64S.The AirLink Pro 64S ASCII terminal interface provides a command lineinterface that consists of a body of commands for manipulating the operation ofthe AirLink modem. This includes configuring operational parameters,monitoring operation, and responding to alarm conditions. The command lineinterface (CLI) also provides an on-line help facility to aid you in enteringcommands.You can type a question mark (?) at the end of any command field, and thecommand interpreter will display the next valid keyword or operand that youcan enter. If you press <Return> before the command is complete, the commandinterpreter displays the next valid keyword or operand that you can enter. Ifthe command is complete, the system will execute the command. Keywords donot have to be fully typed out if enough letters are provided to eliminateambiguity.You can also type in a help request for a particular command combination, to seewhat comes next.The command line interface is described in more detail in the followingsections.Using the ASCII Terminal InterfaceCommand Line Interface (CLI)The command line interface consists of a body of commands for manipulating theoperation of the AirLink Pro 64S, including configuring operational parameters,monitoring operation, and responding to alarm conditions.
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/97 3-3Command Line Interface Syntax1. A command line consists of a basic command keyword. This basic commandkeyword must be the first word of the command. More specific keywordsand operands follow this basic command keyword. For example:AIRLINK PRO 64S> get RSSI2. Each token (basic keyword, specific keyword, operand) must be separatedfrom 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 inthe prescribed order (always allow for a space between commands).Keywords relating to a different command keyword must follow thatcommand keyword. However, if several keywords relate to the samecommand keyword, the ordering of those keywords does not matter.4. Keywords do not have to be fully typed out if enough letters are provided toeliminate ambiguity. For example:AIRLINK PRO 64S> set alar repo immeinstead ofAIRLINK PRO 64S> set alarm reporting immediately5. Maximum command length is 250 characters, including comments, spaces,and carriage return. Any command that exceeds this is rejected with anappropriate error message.6. Keywords may be entered in either lower case, upper case, or a combinationof both.Editing Capability1. Network Management Ports 1 and 2 are Network Management and ASCIIterminal ports. When they are in the command mode, the system will echocharacters back to these ports.2. Network Management 1 and 2 handle both Backspace and Delete keystrokes from a VT100 terminal. When either key is entered, the functioninvoked is to blank out current cursor location and to move the cursor onecharacter to the left. If the buffer is empty, no action is taken when eitherkey is typed.
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/973-43. 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 acceptanother command.4. When <Control> R is pressed, at the prompt, the previously issuedcommand is displayed. This command can be edited by backspacing todelete characters from the end, and/or by augmenting the command withadditional characters. This is particularly helpful when the user types anincomplete command; all the user needs to type is the remaining word(s).5. A limited help facility is available for the command mode. In commandline, the user may type a question mark ( ? ) at a position where a keywordshould be entered. The Controller displays the available keywords alongwith their explanation. When the user types a question mark at a positionwhere an operand should be entered, the Controller displays the availableoperands and their input range (for instance, 1 to 30, or Yes, No) along withthe explanation of the operands. After printing the help text, theController reprints the command that the user typed without the questionmark and gets ready for the user to type the next operand.6. The same help facility described above is provided when the user enters acarriage return instead of a question mark before the end of a command.There is a difference in response between the termination with a carriagereturn and termination with a question mark. When a question mark isentered, the system always prints the help text for the next token. When acarriage return is entered, the help text is displayed only if the command isnot properly terminated. Otherwise, the system treats it as a completecommand and continues with execution.Command and Operand Description Syntax1. A description syntax is used to show operand ranges and keyword choices.This syntax is used for description purposes only and not for the commanditself.2. [ x1 | x2 | ... | xn] indicates that one of the elements in the set may beselected.3. “ - “ ( a hyphen) indicates a range of numbers explicitly put into thecommand.Command Keyword ListCommand keywords and operands can be used to set or requestconfiguration parameter values, or status information. For keywordslonger than four letters, only the first four letters of each keyword arenecessary and case is not checked (all strings are converted to uppercase). White space characters are required between keywords but the
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/97 3-5type (i.e. space or tab) and the number are not checked. Keywords inparentheses are optional; such words need not be typed for the commandto execute. Refer to Appendix D for a complete list of keywords.Power-Up MessagesFollowing power up, the system displays a series of successfully passed testssimilar to the following:Waiting for Xilinx InitLoading XilinxXilinx loaded OK!RAM test passedEPROM passed checksum testXilinx EPROM passed checksum testNVRAM Test PassedPassed Database checksum testRTC Test: PassedPassed CFG DB Checksum testEvent Queue test: PassedInitializing Xilinx registersCYLINK Corporation, Sunnyvale, CA 94086AirLink Pro Software, Copyright (C) 1996Logging into the SystemAfter the tests results are displayed, the user should type LOGIN:AIRLINK PRO 64S> LOGINThe user is now in the Login Mode. Press <RETURN> and enter the Passwordwhen prompted. If you issue any command without logging in first, the systemreminds you to log in:AIRLINK PRO 64S> TYPE LOGIN FIRSTNOTE 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 inprompt for the Password. This password will remain in effect until changed.If you wish to change the Password, issue the command SETPASSWORD at the prompt (see the section on PASSWORD later in thischapter for setting a new password). If the Password is accepted, thesystem 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-to-point system.
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/973-6LogoutThis command is used to exit the system. It should be done when allconfiguration and setup is completed to prevent unauthorized use of the system.AIRLINK PRO 64S> logoutHelpThis command is a request for the on-line help facility. If the HELP keywordis not followed by any additional parameter, a command summary isdisplayed. If a specific command follows the HELP keyword, a list of all thepossible parameters for the specified command is displayed. You can also typein a help request for a particular command combination, to see what comes next:AIRLINK PRO 64S> help setThe system displays a list of command keywords similar to the following:Next available Keywords or Operand:ALARMAPPLICATIONCOMMCONNECTIONDATADATEAPPLICATIONSITEPN CODETX CLOCKTX VCXOLocal, Remote and Both OperationsThe Command Line Interface allows the user to configure and monitorboth 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 farend only, the "REMOTE" keyword must be used. To configure both endsof the link, the "BOTH" keyword must be used. These keywords, whenused, must precede the command keyword to be invoked.The syntax is as follows:(LOCAL) <command>REMOTE <command>
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/97 3-7BOTH <command>For example, if you type SET SITE NAME Sunnyvale at the prompt, thesite name is changed to Sunnyvale for the local unit. At the Prompt typeAIRLINK PRO 64S> remote Get statusto query the status of the remote unit. To configure both ends of the linkuse the BOTH command.AIRLINK PRO 64S> both Set pn code 4NOTE REMOTE and BOTH commands apply only to point-to-point configuration.Administrative ParametersSite NameThe 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 60alphanumeric characters.To set the site name for the local AirLink Pro 64S, type the following commandat the AirLink Pro 64S prompt:AIRLINK PRO 64S> set site namewhere name is a description of up to any 60 alphanumeric characters. Forexample, to set the site name of the local AirLink Pro 64S to Sunnyvale 2, typethe following command at the AirLink Pro 64S prompt:AIRLINK PRO 64S> set site Sunnyvale 2To set the site name of the remote AirLink Pro 64S, use the command:AIRLINK PRO 64S> remote set site nameIt is important to select a site name that will distinguish the unit from others inthe network. This allows conformation that changes are being made to thedesired link. The site name is also saved when the Alarm Log is saved as a fileon a PC.
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/973-8Date and TimeThe date and time are used in system operations as well as to provide areference in time-stamping status, performance and alarm information.To set the date for the local AirLink Pro 64S, type the following command atthe AirLink Pro prompt:AIRLINK PRO 64S> set date dateThe operand date is the calendar date, and takes the form mm/dd/yy, wheremm is a number from 1 to 12, dd is a number from 1 to 31, and yy is the last twodigits of the current year. For example, to set the date of the local AirLink Pro64S, type the following command at the AirLink Pro 64S prompt:AIRLINK PRO 64S> set date 9/30/96To set the time for the local unit, type the following command at the AirLinkPro 64S prompt:AIRLINK PRO 64S> set time timeThe operand time is a 24-hour clock value that takes the form hh:mm:ss, wherehh is a number from 0 to 23, representing the hour, mm is a number from 0 to 59representing 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 asetting 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 10:35:00To set the time of the remote unit, use the command:AIRLINK PRO 64S> remote set time timeor save a step by using the BOTH commandAIRLINK PRO 64S> both set time 14:26:00NOTE The additional time required to access the remote end of the link is a fraction of a secondand need not be taken into account.
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/97 3-9PasswordThe password is needed when the unit is powered on, or after the operator logsoff the system and wants to enter it again. The operator must provide thecorrect password to use the GET, SET, RESET, TEST and REMOTE commands.When the unit is prepared for shipment, it is configured with a null passwordas a default. To gain access to the system the first time, press <Return> inresponse to the log in prompt for the password.To protect the system, you should change the password at the earliestopportunity. The new password should also be written down and stored in asafe place. After changing the password, you should test the new password bylogging 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 alphanumericcharacters from the set a-z, A-Z, and 0-9. The Password is case sensitive.To set or change the password for the local unit, type the following command atthe AirLink Pro 64S prompt:AIRLINK PRO 64S> set passwordThe system prompts you to enter the old password, prompts you to enter the newpassword, and then prompts you to enter the new password again, forconfirmation. If the second instance of the new password matches the firstinstance of the new password, the new password is accepted. A password can beany 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 atthe AirLink Pro 64S prompt:AIRLINK PRO 64S> set passwordOld Password: <Return>New Password: 1AwombatRetype New Password: 1AwombatSetting Link ParametersNOTE These are service-affecting configuration parameters. Changing any of these parametervalues disrupts the radio link for the time it takes to set compatible parameter values forboth ends of the link. Do not initiate Simplex (test) BURST MODE for the remote unit, oryou will be forced to travel to the remote site to reconfigure the unit.
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/973-10ApplicationThe APPLICATION parameter specifies the role of the unit in a specific systemconfiguration. Figures 3-1 to 3-4 show the various valid configurations. TheAPPLICATION parameter has the following valid options:1. Slave Unit in Point-to-Point Link2. Master Unit in Point-to-Point Link3. Master Unit at Repeater Site4. Reference Master Unit at Hub5. Backup Master Unit at Hub6. Subordinate Master Unit at Hub7. Master Unit in Multipoint Link8. Slave Unit in Multipoint LinkTo set the application for the local AirLink Pro 64S, type the followingcommand at the AirLink Pro 64S prompt:AIRLINK PRO 64S> set application operandwhere operand is a number in the range 1 to 11, corresponding to the optionslisted above. If you do not specify a value, the system assumes the defaultvalue: 1 (slave unit in a point-to-point link). For example, to set theapplication for the local AirLink Pro 64S to 4 (reference master at a hub), typethe following command at the AirLink Pro 64S prompt:AIRLINK PRO 64S> set application 4To set the application of the remote AirLink Pro 64S, use the command:AIRLINK PRO 64S> remote set application operandAll units are shipped from the factory configured as slave units in a point-to-point link. You must configure one of the units in the pair as a master so thatthe 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-pointand multipoint links, hubs, and repeaters.Point-to-Point Link (Applications 1 and 2)
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/97 3-11In a point-to-point link ( See Figure 3-1), where one AirLink Pro 64S modempair consists of a master unit (Application 2) and a slave unit (Application 1),the master unit provides the burst synchronization signal source for the linkwhen transmitting data. The slave unit synchronizes to this timing referencewhen it transmits data back to the master unit.Figure 3-1Point-to-Point ApplicationPoint-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 thisconfiguration, the host DTE may receive a response from a remote DTE whilebroadcasting a poll or transmitting data to a second remote DTE. All the slaveunits receive when the master unit transmits. The master unit receives when aslave transmits. Only one slave unit transmits at a time and this is determinedat the DTE interface level, transparent to the AirLink modems via theassertion of the DTE interface signal “RTS”. The master unit provides the burstsynchronization signal source for the link to each slave unit in the system. Eachslave unit synchronizes to this timing reference when it transmits data back tothe master unit.
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/973-12Figure 3-2Point-to-Multipoint ApplicationHub Application (Applications 4, 5, and 6)A hub application is used when two or more full-duplex links emanate from asingle centralized location. In a hub configuration, two or more units are co-located at the hub site. One of the units is the synchronizing unit, theReference Master (Application 4), which generates the burst timing referencefor the other units. This burst synchronization minimizes near-end inter-channel interference among the units and all the units transmit and receive atthe same time. Should the Reference Master unit fail, a second unit, Back upmaster at a Hub (Application 5), is designated to provide the burstsynchronization signal to the rest of the units at the Hub. All other units areconfigured as Subordinate Master units (Application 6) [ See the section “BurstSynchronization” in Chapter 2].
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/97 3-13Figure 3-3Hub ApplicationRepeater (Application 3)When either the range is too great for a single hop installation between masterand slave, or line of sight can’t be achieved due to physical obstacles, onesolution is to use a repeater configuration. Repeater mode extends the range ofremote slave units. As shown in Figure 3-4 , this is accomplished by connecting aslave unit to a master unit in a repeater mode. A repeater is a special case of asecondary hub in which the burst sync signal source is a slave modem. Thisallows communication with remote slave units that otherwise could not bereached. In a repeater, the two AirLink Pro 64S units that form the cross-overpoint between the previous segment of the entire repeater link and the nextsegment of the repeater link are referred to as the repeater site .
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/973-14Figure 3-4AirLink Pro 64S Two Part Repeater LinkAt a repeater site, there are two modems: the slave modem (Application 1 orApplication 8) for the previous hop, and the master modem (Application 3) forthe next hop. To avoid interference, these modems must be burst synchronized,and since the slave's burst synchronization signal is defined by the receivedsignal from the originating master, it must provide a burst synchronizationsignal to the repeater master modem for the next hop. A crossover cable mustconnect the DTE interfaces of the two modems at the repeater site.The burst synchronization signal pair of the slave unit at the repeater site iswired to the burst synchronization signal pair of the master unit at the repeatersite so that the slave at the repeater site provides the burst synchronizationsignal for the master unit of the next segment of the link.
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/97 3-15Repeater VariationsIf other AirLink Pro 64S units are located at the repeater site, the repeater siteis treated as a hybrid hub, where the added units are wired to the burstsynchronization signal pairs of the slave at the repeater site and synchronizetheir transmit bursts to the burst synchronization signal from the slave at therepeater site. These units should be configured as master units at a repeatersite (Application 3) for the next hop of the repeater link, or as secondarymasters 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 64Sunit that serves as the near-end unit in the entire repeater link can beconfigured as a master unit in a point-to-point link (Application 2). TheAirLink Pro 64S unit that serves as the far-end unit for the entire repeater linkis 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 firsthop is set up as a point-to-point master or a Hub master depending on theapplication. The masters for all other hops are set up as Master unit at arepeater site (Application 3). All slaves are set up as slave units in a point-to-point link (Application 1).Configuring the DTE InterfaceThe AirLink Pro 64S DTE port is the physical interface by which user data istransported into and out of the modem. The DTE port consists of two physicalconnectors, only one of which can be active at any particular time. Oneconnector is used for RS-232 interfaces, and the other is used for V.11/V.35 andEIA-530 interfaces. The DTE interface emulates DCE operation and should beconnected to a DTE. Configuration of the DTE interface consists of setting theinterface mode, the data stream parameters, and the flow control parameters tomatch the user’s Data Terminal Equipment, using the following appropriatecommandsDTE ModeThis command is used to choose the DTE interface standard. The values areDisabled, RS-232, EIA-530 and V.35. The DTE interface incorporates aprotection circuit which helps to prevent damage to customer equipment andthe modem interface circuitry. Since the interface standards specify differentvoltage levels, damage can occur if the AirLink Pro 64S is configured for aninterface standard different from the one being delivered via the cable goinginto the DTE connector. The actual interface available on the connector used for
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/973-16the 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 aredisabled. The drivers to each of the two connectors are tri-stated. Before theDTE interface can function, the SET DTE MODE must be issued to select thedesired 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 ProtectionThe DTE ports support three different interface standards, which use differentvoltage levels for the interface signals. As a result, there is a possibility ofdamaging the internal interface circuitry if a DTE device using one of the threestandards is connected to an AirLink 64S modem configured for a differentstandard. Both of the connectors provided are in DB-25 format, one used for RS-232 connections, and the other for V.35 or EIA-530 connections. Only oneinterface standard can be enabled at any one time. To minimize the potentialfor damage, a protection circuit has been included in the modem to sense voltagelevels of certain signals and disable the interfaces when an incorrect voltage isdetected.In order for the protection circuit to function properly, certain interface signalsmust be present. The RS-232 interface uses the TXD (Transmit Data) signalexclusively for voltage detection, but the V.35 and EIA-530 interfaces use bothTXD and DTR (Data Terminal Ready). Depending on the user’s equipment, thelack of interface signals may be caused by the inadvertently disabled interface.To avoid this, a command has been provided to enable or disable the protectioncircuit. It is important to bear in mind that if this circuit is disabled, or if theproper interface signals are not active, protection of the interface cannot beguaranteed.To set up the DTE protection circuit, type the following command at theAirLink Pro 64S prompt:AIRLINK PRO 64S>set DTE Protection operandwhere 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 isnecessary to discriminate between a proper RS-232 connection and an improper V.35 orEIA-530 connection.
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/97 3-17Therefore, if the DTE equipment is supplying an RS-232 signal using voltagelevels less than 7 volts, the AirLink Pro modem will not operate correctly unlessthe DTE Protection circuit is disabled.Table 3-1Voltage Requirements DTE Protect ConfigurationDTE Interface Voltage RequirementsRS-232 on TXD>7.0 or <-7VV.35 on DTR >7.0V or <-7V andon TXD <7.0V or >-7.0VEIA-530 on DTR <7.0V and >-7Vand on TXD <7.0V and >-7VData RateThis command specifies the data rate for synchronous and asynchronousdata transmission. For asynchronous data rates up to 16.0 kbps that arenot specifically listed, 64 kbps synchronous mode should be selected.To set the data rate for the local unit, type the following command at theAirLink Pro 64S prompt:AIRLINK PRO 64S> set data rate operandwhere operand is 64, 56, 19.2, 9.6, or 4.8 for synchronous and 19.2, 9.6, or 4.8 forsynchronous or asynchronous. If you do not specify a value, the system assumesthe default value: 64 kbps.Comm ModeThis command specifies the communications mode of the unit. For asynchronousmode, it specifies the character lengths of the data. Total character lengthincludes the start, stop, parity, and data bits; all are in accordance with CCITTV.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 theComm Mode for the local or remote unit, type the command followed by theoperand after the command line prompt:AIRLINK PRO 64S> set comm mode operandAsynchronous 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 rateto 64 kbps, and the TX Clock Source to Internal. In this case, the asynchronous
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/973-18data bits are sampled by a 64 kHz clock in the transmitter, which means thatthere are at least four samples per bit. The asynchronous bits are thenreconstructed on the other side of the link by the receiver. For all asynchronousdata applications, if the DTE is providing a clock signal on the TT pin, thecommand “Set TT Clock Detect Off” should be issued to avoid confusing theAirLink unit’s automatic detection circuit.RTS SourceThe RTS Source is the Request-to-send signal source for the unit. It takesthe values Internal and External. Internal is selected when data flowcontrol is not needed (for instance, in a point-to-point link). The unitignores the RTS lead and activates the RTS internally. External is selectedwhen data flow control is needed (for instance, in multipoint applicationor point-to-point repeater extensions to or from multipoint system). Theunit responds to RTS lead and CTS signal follows RTS to CTS delay asspecified with the RTS DELAY parameter.RTS DelayThis command is used to specify the maximum RTS to CTS delay time inmilliseconds. 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 ClockModesThe AirLink Pro 64S synchronous data clock mode is determined by twoparameters: the internal clock oscillator phase reference and the transmit datasample clock source. The commands that set these parameters are describedbelow. These commands are used to configure the modem for one of the fourclocking configurations (DCE/ST, DCE/TT, DTE/TT, or HUB/ST) described inthe AirLink Site Planning Guide in the chapter entitled “System Planning”.The command sequences required to emulate these AirLink One clocking modescan be found after the command descriptions.The use of these commands is optional and will not be needed for mostinstallations, as these parameters are set to defaults depending on whichapplication is selected by the “Set Application” command. The default values
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/97 3-19for all the applications are shown in the table below. Although there is notnecessarily an exact one-to-one correspondence between AirLink One andAirLink Pro 64S clocking modes, the equivalent clock mode from the AirLinkSite Planning Guide that most closely matches is shown in the table. Ingeneral, the default values assume that the modem clock will be used by theDTE as a reference to clock out its data.Table 3-2Applications with Clock ModesApplicationNumber Application TX VCXO Source TX ClockSource ClockMode1Slave Unit in a P-P Link Receive_Clock Internal DCE/ST2Master Unit in a P-P Link Free_Run Internal DCE/ST3Master Unit at a Repeater Site Burst_Sync_Clock External DTE/TT4Reference Master at a Hub Free_Run Internal DCE/ST5 Backup Master at a Hub Burst_Sync_Clock Internal HUB/ST6Subordinate Master at a Hub Burst_Sync_Clock Internal HUB/ST7Master Unit in a MP Link Receive_Clock Internal DCE/ST8Slave in a MP link Free_Run Internal DCE/STTX Clock (Source)This command sets the Transmit (TX) clock source. The values are eitherinternal or external. When set to internal, the modem uses its internaloscillator 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 itshould 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 bythe user on the “TT” pin of the DTE interface. If no clock is provided, themodem will not function properly.To set the TX Clock for the local unit, type the following command at theAirLink Pro 64S prompt:AIRLINK PRO 64S> set TX Clock operandwhere operand is internal or external. The default value is internal.TX VCXO SourceThis command sets the phase reference for the AirLink Pro 64S modem internaltransmit clock oscillator. Normally it is desirable for an entire data network to
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/973-20be synchronized to a single, stable frequency reference. The various networkconfigurations that AirLink Pro supports require four choices for the phasereference: no reference (the oscillator freeruns), the externally-supplied TTclock from the DTE interface, a clock derived from the received RF signal, and aclock supplied on the burst sync bus.To set the transmit VCXO phase reference source, type the following commandat the AirLink Pro 64S prompt:AIRLINK PRO 64S>set tx vcxo operandwhere operand is free_run, tt_clock, burst_sync_clock, or receive_clock.Generally, the source of synchronization will be either an AirLink modem’s owninternal oscillator or an oscillator residing in the DTE equipment. If themodem’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 toa phase reference derived from the externally-provided clock signal from theDTE port (TT_Clock). All other modems in the network must also besynchronized to this source. Other AirLink Master units at a hub aresynchronized via the Burst Sync Bus, which provides a phase reference(Burst_Sync_Clock) for the VCXO. AirLink Slaves are typically synchronizedwith a phase reference derived from the received RF signal (Receive_Clock).TT Clock DetectA sensing circuit is provided in the AirLink Pro 64S modem to detect thepresence 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 theDTE via the “ST” (Send Timing) interface signal, and also uses the local versionof 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 datathat errors develop in the data stream. This can be avoided if the received STclock is “looped-back”, or wired to, the TT clock pin of the DTE interface. TheTT clock detector circuit will recognize this, and provides automatic selection ofthe 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 theDTE 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 theAirLink Pro 64S prompt:AIRLINK PRO 64S>set TT clock detect operand
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/97 3-21where 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 operandAirLink One Clock Mode EmulationThe following sections describe how to set up AirLink Pro 64S modems toemulate AirLink One clock modes. See the AirLink Site Planning Guide formore information on this topic.DCE/STThis 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 externalreference. Furthermore, the transmit data is sampled by the local version ofthe data clock.AIRLINK PRO 64S>set tx vcxo free_runAIRLINK PRO 64S>set tx clock source internalIf the TT clock detector is enabled, the AirLink modem will sense and use aclock that is looped back from the “ST” pin to the “TT” pin on the DTEinterface.DCE/TTThis mode is again using the internal oscillator in a freerunning mode, and inthis case it is expected that the ST clock will be looped back. The previousconfiguration (DCE/ST) will handle this condition if the TT clock detector isenabled, but if the user desires to force this mode, the following commands willaccomplish this:AIRLINK PRO 64S>set tx vcxo free_runAIRLINK PRO 64S>set tx clock source externalIn “external” transmit clock source mode, the TT clock detector is alwaysdisabled, and the modem will be forced to use the clock arriving on the “TT” pinof the DTE interface. Be aware that if no clock is present, the modem will notfunction properly.
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/973-22DTE/TTThis mode is used when it is desired to synchronize the AirLink Modem to anexternal reference. Generally, only one modem in a network will be configuredin this mode, and the rest will be synchronized to the master oscillator via theRF 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 versionof the “ST” clock, but is instead an independent reference frequency. Thetransmit data is also sampled by the TT clock. The following commands willemulate this mode.AIRLINK PRO 64S>set tx vcxo tt_clockAIRLINK PRO 64S>set tx clock source externalHUB/STThis mode is required when multiple AirLink modems are present in a singlelocation, known as a hub. One of the modems, the primary or synchronizingmaster, must act as the frequency reference for the entire network, and the othermodems at the hub, referred to as secondary or synchronized masters, must beoperated in this mode. The following commands are used for this purpose.AIRLINK PRO 64S>set tx vcxo burst_sync_clockAIRLINK PRO 64S>set tx clock source internalIn this case, the internal oscillator is synchronized to the clock signal arrivingvia the burst sync cable. A local version of the data clock is derived from thisoscillator, and sent to the DTE via the “ST” pin. The modem will use the localversion of the clock to sample the arriving transmit data, unless of course theclock is looped back onto the “TT” pin, and the TT clock detector is enabled.Independent Network ClocksIt is generally desirable for all of the data clocks within a communicationnetwork to be synchronized to a common frequency reference. This results in allof the network data clocks being frequency-locked, that is, they do not driftwith respect to each other. In some cases, it may be desirable for some of thedata 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 afrequency reference at one end of the link. With AirLink Pro 64S, the Master
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/97 3-23modem transmit oscillator acts as the frequency reference, whether it isfreerunning or locked to an external reference from the DTE. However, theremay be other applications where the transmit and receive data streams need tomaintain synchronization with clocks that originate from independentoscillators at either end of a link.Figure 3-5Independent Network ClocksWhen two or more wireless links are networked together, such as a hubconfiguration, the entire network is usually synchronized to a single frequencyreference. In some cases, it may be desirable for some of the individual links tooperate with independent clocks, and again, within a single full-duplex link, itis sometimes desirable for the transmit (TT) and receive (RT) clocks to beindependent. In the past, AirLinks have required that all clocks besynchronized to a single Master modem at the Hub Site, but AirLink Pro 64Sprovides 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 thattheir frequencies are within a specified tolerance for the AirLink modems tooperate without loss of data. All of the data clocks must be accurate within ±75ppm of their nominal data rate. For example, if the data rate is 64 kbps, theclock frequencies must be in the range of 63.9952 to 64.0048 kHz.Independent Clocks in a Point-to-Point LinkIn a default point-to-point link (Master modem set to Application 2, and Slavemodem set to Application 1), the Master modem’s internal oscillator providesthe frequency reference for all data clocks. The Master can also be set up tosynchronize to an external clock (DTE/TT) as described above. Either way, theslave modem will derive its transmit (and receive) data clock from thereceived RF signal.
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/973-24In order to operate the slave modem with an independent transmit clock that isexternally provided by the DTE, issue the following commands at the AirLinkprompt:AIRLINK PRO 64S>set tx vcxo tt_clockAIRLINK PRO 64S>set tx clock source externalThis 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 beclocked into the modem with the DTE clock, versus the local modem clock.Independent Clocks in a HubAt a Hub Site, the Master modem designated as Reference Master (application4) will act as the synchronizing reference in the default configuration. Its ownslave 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 acomponent 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 operatedwith an independent data clock. Since burst synchronization is necessary, theBurst Sync Bus must remain connected even if independent data clocks are used.Issue the following commands to each Master modem where independent clockoperation is desired:AIRLINK PRO 64S>set tx vcxo tt_clockAIRLINK PRO 64S>set tx clock source externalThis command sequence changes the frequency reference for the transmitoscillator from the “Burst_Sync_Clock” to the “TT_Clock”, which arrives viathe DTE interface port. Also, the transmit data will be clocked into the modemwith the DTE clock, versus the local modem clock.Configuring the RF LinkThe following set of commands are used to set up the parameters that describethe RF communications link. These parameters are particularly important ininstallations where two or more links will be operating in the same vicinity. Insuch installations, it is important to manage the use of the limited number of RFchannels available, as well as the radiated RF power, in order to minimize the
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/97 3-25potential for interference between adjacent links. See the AirLink SitePlanning Guide for more information on this topic.PNThe AirLink Pro 64S has a set of Pseudo-random noise (PN) codes. No PN codeis “better” or “worse” than another. Using a different code helps the AirLinkPro 64S separate the desired incoming signal from undesired signals from otherAirLink Pro 64S links. The PN codes have been carefully engineered to providethe best separation of desired and undesired signals. These are factory setvalues and cannot be changed by the user. The user can select any of the eightpreset sequences.The master unit and the slave unit of an AirLink Pro 64S pair must be set to thesame PN code (pseudo-random noise code). That setting is then stored in theprotected system configuration memory of both units in the pair.To set the PN code for the local unit, type the following command at theAirLink Pro 64S prompt:AIRLINK PRO 64S>set pn code operandwhere operand is a number from 1 to 8. If you do not specify a value, the systemassumes the default value: 1.RangeAirLink Pro 64S is designed to be compatible with AirLink One modems so thattheir links can be operated side-by-side in a Hub application. The MasterUnits at the Hub Site must be burst synchronized (described in the BurstSynchronization section of Chapter 2) and the protocol range limit must be setto the same value. The AirLink Pro 64S has a programmable Range Limit thatcan be set to 46 miles (approximately 74 km) (AirLink One compatible) or 71miles (approximately 114 km) (AirLink Pro 64S compatible).To set the protocol range limit for AirLink Pro, type the following command atthe AirLink Pro 64S prompt:AIRLINK PRO 64S>set range operandwhere 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, anddoes not take into account other factors such as line-of-sight, multipath fademargin requirements, transmit power level, and so forth.
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/973-26RF PlanThis command specifies the radio channel plan. The AirLink Pro 64S maybe configured for one of the two sets of channels. The values are ChannelPlan 1 (Channels 1-15) and Channel Plan 2 (channels 1-20). ChannelPlan 1 consists of 15 channels used in a network consisting of bothAirLink Pro 64S and AirLink One 64SMP units. Channel Plan 2 consistsof 20 channels that are selected when the AirLink Pro 64S unit is not usedin a network containing AirLink One 64SMP units. Refer to Tables 6Aand 6B in Appendix B for center frequencies to each channel plan.RF PowerWhen there are a number of AirLink Pro 64S pairs in a hub arrangement,the received signal levels are dependent on the distances to the remotesites. You may need to adjust the transmit power level to minimize cross-channel interference and ensure that the received levels at the hub are ofequal power. You may also need to set this to comply with applicableregulations.RF Power sets the transmit power level. The values it takes are from 0 to+28 (dBm) in 1 dB increments.RF SleepThe RF section can be powered down into “sleep” mode to conservepower when not in use. You can use this command to power down theRF section. The values are Yes (to power down) and No ( to restorepower). If the RF Sleep mode is enabled, the entire RF section is poweredOFF.Setting Alarm Control ParametersAlarm ReportingThis parameter determines whether alarm events are displayed as theyhappen or are held until you query for them. The operands are Request andImmediate. If you choose Request, then alarm events are displayed only whenqueried. When Immediate is chosen, alarm events are displayed as soon asthey occur.
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/97 3-27Alarm LevelThis parameter sets the severity level for reporting alarms: Status, Minor, andMajor. Status messages are the least severe and all events are reported, whilethe Major messages are the most severe and only fault events are reported.Refer to Tables A-1 to A-3 in Appendix A.Alarm HoldoffThis command specifies the amount of time for which an alarm conditionmust persist before a dialout attempt is made. One or more events mayoccur and overlap during this interval; there must always be at least oneevent occurring for the duration of the interval. The value ranges between0 and 600 seconds.HUB_SYNCThis parameter specifies the burst sync activity type for a hubapplication. The values it takes are Single and Dual. If you choose Single,then the activity on the primary burst sync bus is reported; loss ofactivity on the backup burst sync bus is ignored. The loss of activity onprimary burst sync bus generates a Major alarm. If Dual is chosen thenactivity on primary and backup busses are reported. Loss of activity oneither bus generates a Minor alarm; loss of activity on both bussesgenerates a Major Alarm.Threshold RSSIThe Threshold RSSI command indicates the minimum acceptable ReceiveSignal Strength indicator value before an entry is made in the event queue.The values range from -95 to -50 dBm.Threshold RSQThe Threshold RSQ command indicates the minimum acceptable ReceiveSignal quality value before an entry is made in the event queue. Thevalues range from 1 to 10 .
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/973-28Threshold 1 HR ESThis parameter specifies the number of errored seconds (ES) events thatmust occur in a 1-hour interval before an entry is made into the eventqueue. One errored second is a 1-second interval in which a CRC-16 erroris detected in the data payload. The operand is between 1 and 999.Threshold 1 HR UAS1 HR UAS threshold sets the number of unavailable seconds (UAS)events that must occur in a 1-hour interval before an entry is made intothe event queue. One unavailable second is a 1-second interval duringwhich Radio Sync Loss has occurred. The value must be in the rangefrom 1 to 99.Threshold 24 HR ESThis command sets the number of errored seconds (ES) events that mustoccur 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 UASThis command specifies the number of unavailable seconds (UAS) eventsthat must occur in a 24-hour interval before an entry is made into theevent queue. The values must be in the range from 1 to 99.Other Command Keywords and OperandsBesides the SET and GET command keywords, the terminal user interface alsoprovides command keywords for resetting. The Reset command controls thefollowing parameters.RESET QRSSALARMSTESTDEFAULTSQRSS
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/97 3-29You can use this command to reset the QRSS error register and restart a test.AlarmsThis command resets the alarm events in the event queue.TestIf you need to terminate a test, issue the command RESET TEST and the systemterminates the current test. Only one test can be active at a time. If you attemptto start up a second test while a test is running, the system terminates the firsttest and activates the second.DefaultsThis command resets the unit to factory default configuration. When aunit is new, or the software revision has been upgraded, the unit'sconfiguration memory will not contain valid, recognizable values. Atpower-up, the software will sense this to be the case, and set the valuesto a set of factory defaults.These default values are:General Default Configuration: Site Name: (blank) Application: 1. Slave Unit in a Point-to-Point PN Code: 1 RF Channel: 1RF Frequency: 2404.468 RF Power: 0 dBm RF Channel Plan: 20 channels RF Sleep: No Comm Mode: Synchronous Data Rate: 64 kbpsBurst Timing: Receive Sync Tx Clock Source: InternalTx 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
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/973-30Setting Modem ParametersIntroductionThe AirLink Pro 64S ASCII terminal and Network Management ports areEIA/TIA-232 interfaces that allow terminal devices or personal computers tocontrol and monitor AirLink Pro 64S operation at either end of a point-to-pointlink. Each EIA/TIA-232 connection can be either a direct connection (device toport), 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 thecase of a modem link), commands issued from that port, along with theresponses 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 theremote end. This announcement identifies the unit type, the site name asconfigured by the user, the date and time, plus a copy of the alarm text message.For example:>>> AIRLINK PRO 64S> Sunnyvale Engineering Unit 112 APR 95 14:33:59 Receive Power Below Threshold
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/97 3-31NOTE The particular alarm message chosen is the highest-priority alarm condition in effect whendialing commences.Connection and ConfigurationThe unit is shipped with a default configuration of DISABLED and 9600 bps.Any changes to the default values can be made using the command lineinterface. To change the settings, use the command line interface. Each of theconfiguration items is stored in the configuration database. In addition, thestate of the connection is maintained so that recovery from a power failure willre-initiate the connection.Multidrop configuration (multiple units sharing a modem) is supported only bythe use of an external port-sharing device.Modem Setup ProceduresA pair of Hayes-compatible “external” modems, 1200 bps or higher is required.Configure each modem according to the following procedure. Note that not allso-called smart modems are identical. Please check your modem user’s manual.Configuring the Modem1. 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>, orselecting a DIP switch on some modems.3. Configure the modem to ignore RTS, by typing AT&K0<RETURN> (Hayescompatible modems), or AT&H0<RETURN> (US Robotics modems), or byselecting 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 invokedby typing AT&Q5<RETURN> on Hayes compatible modems, orAT&M4<RETURN> on US Robotics modems.
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/973-325. Set the number of rings you want the modem to answer on, by typingATS0=X<RETURN> where x is a digit from 1 to 9 (the number of rings), or0 (zero) for no answer.6. Save the new configuration in the modem’s non-volatile memory by typingAT&W<RETURN>.7. Cycle power on the modem.Connecting the ModemConnect the modem at the AirLink Pro 64S end as follows:1. Configure the AirLink Pro 64S modem port speed by issuing the followingcommand at the Terminal port SET MODEM RATE XXXX <RETURN>where XXXX is the speed in bits per second, for instance 1200, 2400, 4800, or9600.2. Connect the unit’s modem port to the modem using a standard EIA/TIA-232modem cable, with a 9-pin male DB-9 connector at the unit end and anappropriate connector (typically male DB-25) at the modem end.3. Connect the modem’s phone port to the phone line using an appropriatecable (usually supplied with the modem).Connecting the Modem to the Remote TerminalConnect the modem to the remote terminal as follows:1. Connect the terminal’s modem port to the modem using a standardEIA/TIA-232 modem cable.2. Connect the modem’s phone port to the phone line using an appropriatecable (usually supplied with the modem).Testing the Modem Link1. Issue the following commands at the Terminal port:Table 3-3Terminal Commands of the Modem (Port) InterfaceCommand DefinitionSET DIAL LEVEL MAJOR <RETURN> Prevents dialing of most alarms while the linktestingSET ALARM HOLDOFF 600 <RETURN> Prevents any alarms from being dialed for at least
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/97 3-3310 minutesSET MODEM MODE BOTH <RETURN> Enables dial-in and dial-outSET DIAL TONE <RETURN> TONE (touch-tone) or PULSE (rotary)SET PHONE 1 XXX-XXXX <RETURN> XXX-XXXX is the remote modem phone numberSET PHONE 2 XXX-XXXX <RETURN> Optional backup phone numberGET MODEM CONFIG <RETURN> To view and verify the modem configurationCALL 1 Manually dial the phone number programmed bythe SET PHONE 1 command above2. Type characters at the terminal port; they should appear on the terminalconnected 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 themanual dial-out connection. The modem link is now operational.FunctionsPort DuplicationDuring a manual connection (dial-in or dial-out), the modem and Command LineInterface (CLI) ports appear as one at the character level. Any character typedby either party is echoed on both terminals and entered into the ensuingcommand. For example, if the CLI port user types "GET" and the modem portuser types "<blank>CONFIG" and presses RETURN, both users will see "GETCONFIG" and the GET CONFIG screen.LoginWhen first dialing in, the remote user has to enter a password even if the localuser is already logged in.Auto Answer FunctionIf Auto Answer mode is selected, the unit sends an automatic answeringcommand to the modem to answer incoming calls after a designated number ofrings. Otherwise, the modem will be configured not to answer.Events
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/973-34Events are defined in the AirLink Pro 64S as Major Alarm, Minor Alarm, orStatus. These are the three levels of severity, with Major Alarm being thehighest. The user may select a dial-out threshold as one of these levels byissuing the SET DIAL LEVEL command, in much the same way as selecting theevent reporting level with the SET ALARM LEVEL command. The Dial-outfunction will dial out when there is a condition at or above that level. Forproper operation, the dial-out severity level must be equal to or greater thanthe event queuing level.Dialout FunctionDuring an event, the modem is directed to dial the telephone number(s) in theconfiguration database and send a brief descriptive announcement. Theconnection is then terminated. Up to two numbers can be selected; a primarynumber that will always be dialed first, and a backup number in case the unitcannot reach the primary number. Also, the unit will make repeated attemptsto dial if the first attempt is unsuccessful.OperationThere are two user-configurable thresholds for alarms. An alarm thresholdestablishes the point when the unit begins to dial-out. In addition, to preventexcessive dialing in the presence of repetitive events, a dial holdoff time isdefined.Alarm Holdoff Time (0 - 600 seconds; default = 10)One or more events must persist between 0 - 600 seconds before a dial-outattempt is made. When set to zero, the unit dials out immediately.One qualifying event must be present although Alarm Holdoff does not requirethe same condition for the entire interval.Repeat Alarm Count (2 - 1000 counts; default = 10)Events are alternately declared and cleared for cyclical alarm conditions andmust be declared between 2 - 1000 counts during the period defined by AlarmHoldoff Time. The event does not have to be the same one each time. Dial-outis not attempted until the end of the alarm holdoff time, even if the RepeatCount 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-outswhen alarms are repetitive. This alarm timer operates independently of the
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/97 3-35alarm holdoff time and repeat alarm count. After a dial-out, any persistent orrepeated 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 DialRetry time is applied.If any of the above parameters is changed, or if the event queue is reset withthe RESET ALARMS command, the holdoff counters and timers will bereinitialized. This is to prevent spurious dial-outs.Repeat Dialing and PrioritizationDuring dial-out, an alarm text message is sent according to a prioritizationscheme (the highest-severity alarm condition in effect is sent first). If thereare multiple alarms present at that level, the text is for the first-occurringevent.Alarm conditions of a persistent nature, that do not clear themselves, willresult in repeated dial-outs. Alarms of this class include all the conditions atthe Major Alarm levels, such as Radio Sync Loss and No Burst Sync. One-timeevents, such as Errored-second threshold exceeded, and fault-clearedconditions, result in only a single dial-out.Telephone Numbers and Dial FormatThe primary telephone number is the first number dialed. Ringing will continuefor a user-specified period (default is 30 seconds) before giving up asunanswered. When the connection to the primary telephone number is notsuccessful, then the secondary number is attempted.If neither the primary nor the secondary number is successful, then the AirLink-Pro 64S waits for a Dial Retry period before retrying. In this case, an advisoryevent is logged stating the reason for the failed dial-out. In addition, if theunit is unable to communicate with the modem, it will continuously retry (noholdoff period is imposed), and log an advisory. Only one advisory message ofeach type will be logged per dialing session (from the first failed attempt untildial-out is successful) in order to prevent the event queue from becoming floodedwith dial-out failures. No busy or no-answer advisory event will cause a dial-out.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')
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/973-36!Flash (0.5 second ON-HOOK signal)@causes the modem to wait 30 seconds for one or more ringsfollowed by 5 seconds of silence before processingthe next character. This is used when the systembeing 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 ConnectionsTo troubleshoot, enter the command to dial a specific telephone number andhold the connection. The syntax for this command is:CALL 1CALL 2CALL telephone-numberWhen the parameter is given as 1 or 2, the unit will dial the stored primary orbackup phone number respectively. Otherwise, the modem will dial thenumber supplied on the command line. The telephone number must follow thesyntax of the configured telephone numbers.CALL does not automatically retry upon dial-out failure; this is strictly amanual 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 userissues a DISCONNECT command, the remote modem hangs up, or (ifconfigured), a Connection Timeout timer expires.Manual or automatic connections can be terminated immediately by using thefollowing command:DISCONNECTThis immediately hangs up the telephone connection and returns the dial-outfunction to IDLE. RTS is returned to its configured state and DTR is released.DISCONNECT also abandons any dial-out attempt in progress but does NOTprevent future dial-outs. For this reason, the mode should be set to DISABLEDbefore performing any maintenance functions.
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/97 3-37RS-232 Modem Port InterfaceData Rate and Port ParametersThe 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 adjusttheir RS-232 bit rate to that of the DTE.Before using an unknown modem, it is a good idea to reset its configuration to thefactory defaults, then configure the three-wire operation if desired. For mostmodems, this can be accomplished by issuing the following commands:AT&F<RETURN> Reset to factory defaultsAT&K0<RETURN> Ignore RTSAT&D0<RETURN> Ignore DTRThe remaining unchanging port parameters are:1 start bit1 stop bit8 data bitsno parityProtocol ModemsProtocol modems support MNP or other data compression. Since protocolmodems introduce unneeded complications for flow control, and the AirLink Pro64S modem data rate needs are modest, such protocols should be turned off.However, error correction should be enabled if available; it will preventgarbage characters from appearing on the remote terminal when the unit hangsup the modem. This option is normally enabled by factory default on modemsequipped with it.ResponsesAll numeric responses are followed by <CR> (ASCII 13 decimal). All “word”responses are followed by <CR> and <LF> (ASCII 10 decimal).Table 3-4Modem Response DefinitionsModem Response Definition0 (zero) Numeric version of "OK"
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/973-38OK Successful execution of non-dial commandCONNECT [XXXX] carrier detected; XXXX = numeric bit rateRING Ringing detectedNO CARRIER No connection established, or connection lostERROR Error in command lineNO DIALTONE No dial tone presentBUSY Busy signalNO ANSWER 5 seconds of silence not detected if '@' dial modifier was used.User Interface AdditionsTable 3-5Modem CommandsParameter SpecificationSET 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 | STATUSSET 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-XXXXSET PHONE 2 (XXX) XXX-XXXXSET REPEAT COUNT 0-99SET RINGCOUNT 0-9The GET MODEM configuration command retrieves all of the Modem Commandparameters. This command produces a screen displaying all of the settings, thedial-out status, and the date and time. In addition, all the SET and GETcommands are available via the REMOTE prefix.The following commands are also supported:CALL 1 manual connectCALL 2 manual connect
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/97 3-39CALL telephone-number manual connectDISCONNECT manual disconnectGET MODEM view modem and dial-out parametersGET RS232 status of RS-232 handshaking linesResponses and AlertsEach of the following messages is an advisory. These advisories will nottrigger a dial-out, but they are entered into the Event Queue."Modem Busy""No Modem""No Answer""No Dialtone"Default ParametersTable 3-6AirLink Pro 64S Dialout ParametersParameter DefaultALARM HOLDOFF 10 secondsCONNECTION 3600 seconds (1 hour)DIAL FORMAT TONEDIAL HOLDOFF 5 minutesDIAL LEVEL ALARMMODEM MODE DISABLEDMODEM RATE 9600PHONE 1 (blank)PHONE 2 (blank)REPEAT COUNT 10 eventsRINGCOUNT 1Alarm HoldoffThis is the period of time between the onset of the first alarm condition, andthe unit dialing out to report the alarm. During this period, an alarm conditionmust have existed continuously, or a minimum number of events must have
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/973-40occurred. The minimum number of events is defined by Repeat Count. The alarmevents 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 CountThe number of alarm events occurring at or above the Dial Level, during theAlarm 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 LevelThe 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 HoldoffThe period of time between alarm dial-outs. This time period is independent ofthe alarm holdoff and dial retry time periods. To set this value, type thecommand:SET DIAL HOLDOFF XXX <RETURN>where XXX is the period in (3 - 5000) minutes. The default is 5.Dial FormatTo set the Dial format to TONE or PULSE, type:SET DIAL TONE <RETURN>orSET DIAL PULSE <RETURN>
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/97 3-41The default setting is TONE.Dial RetryIf the unit dials an alarm and reaches a busy or no answer signal, the unit willdial a second number if one is specified. Both numbers are dialed before aholdoff period is imposed. There is no automatic retry when the unit isconfigured for manual dialing.To set the holdoff period before the unit dials the first number again, type thecommand:SET DIAL RETRY XXX <RETURN>where XXX is the period in (15 - 3600) seconds. The default is 60.Modem (Enabling) ModeThis is the modem operation mode that is described in the section Using theNetwork Management (Modem) Port. To set this mode, type the command:SET MODEM MODE {DISABLED | DEDICATED | DIAL_OUT | ANSWER | BOTH}The default is DISABLED.Modem RateThis is the bit rate of the modem port. To set this parameter, type thecommand:SET MODEM RATE {1200 | 2400 | 4800 | 9600}The default is 9600.Phone Numbers 1 and 2Phone number 1 is the phone number that the unit will dial first when trying tosend out an alarm message. The phone number must be specified if a dial-outmode is chosen. Phone number 2 is an optional second phone number that theunit 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>orSET PHONE 2 XXX-XXXX <RETURN>
AirLink Pro 64S Installer’s GuideConfigurationRev. B - 2/973-42where XXX-XXXX is the phone number. Any string of up to 20 characters isacceptable, provided the modem can interpret it. This string is preceded by theletters 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 CallWaiting. For example:SET PHONE 1 9, 555-5555 <RETURN>Ring CountThis mode determines the number of rings the modem at the unit end willanswer. In order to use this command, the modem must be connected to the unitand 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. Thedefault is 1.ConnectionThis mode determines the time period the unit will terminate a manualconnection, 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 is3600 (one hour).
Rev. C - 1/97 4-1CCHAPTER HAPTER 44Operations and MaintenanceOperations and MaintenanceThis chapter contains information on the operation and maintenanceof the AirLink Pro 64S. It includes procedures for monitoring thealarm queue and describes how the AirLink Pro 64S responds toparticular alarm conditions.Inside this chapter:Overview.................................................................................4-2Acquiring Status Information............................................4-2Acquiring Alarm Information..............................................4-7Acquiring Performance Information...............................4-10Diagnostic Tools.................................................................4-13
AirLink Pro 64S Installer’s GuideOperations and MaintenanceRev. C - 1/974-2OverviewThis chapter focuses on monitoring system operation by querying for status,performance, and alarm information through the terminal user interface. Thischapter also includes descriptions of the Major and Minor alarm LEDs on theAirLink Pro 64S digital module. Finally, this chapter describes the diagnostictests and procedures used to isolate and resolve errors occurring during radio unitoperation.Acquiring Status InformationEach AirLink Pro 64S system maintains an internal database of status andperformance information that it uses, in part, to derive the events that arestored in the event queue. The status information categories include:❚DTE Status❚Radio Synchronization Loss❚Burst Synchronization Loss❚Test in ProgressDTE Status is available from both the local and the remote AirLink Pro 64Sunits.Viewing Status InformationTo view the status information for the local unit, type the following commandat the AirLink Pro 64S prompt:AIRLINK PRO 64S> Get statusThe system displays a list of status information similar to the following:AIRLINK PRO 64S> Get statusSite Name:Test in progress: NoneDTE Status: DisabledRadio Sync Loss: NOBurst Sync Loss: NoRSSI: -62.3dBm (typical value)
AirLink Pro 64S Installer’s GuideOperations and MaintenanceRev. C - 1/97 4-3RSQ: 10.0VSWR: N/ADate/Time: 09 Jan 1996 13:20:34The significance of these information categories is explained in the followingsections.DTE StatusIndicates whether the DTE interface is enabled or disabled. When it isenabled it will also indicate which interface is enabled:❚RS-232❚RS-232❚No RTS❚V.35❚V.35❚No RTS❚EIA-530❚EIA-530❚No RTS❚Unknown DTE type❚voltage error.Radio Synchronization LossIndicates whether radio synchronization has been lost. The time to detect lossand the time for recovery are the same (17ms).Burst Synchronization LossIndicates whether burst synchronization has been lost. The time to detectsynchronixation loss and the time for recovery are the same (1second).RSSIRSSI (Receive Signal Strength Indicator) provides an indication of the amountof “raw” RF signal being received at the frequency of the AirLink. It is an
AirLink Pro 64S Installer’s GuideOperations and MaintenanceRev. C - 1/974-4unqualified signal because it is a reading of all RF at that frequency. RSSI canbe used as a single spectrum analysis by recording values for each channel.When selecting a channel for a new link, select the one that has the lowestRSSI for both ends of the link. The RSSI value can be viewed by issuing theGET STATUS command, and looking at the RSSI line on the response screen:RSSI: -83.5 dBmIf RSSI is uncalibrated, the following line will appear:RSSI: UncalibratedNOTE If the unit is uncalibrated, it should be shipped back to Cylink.Alternatively, the RSSI can be displayed continuously by issuing the TESTRSSI command. The user will be prompted to respond Yes or No, as follows:Are you sure? Type Y for yes, N for no. >(Press Y to proceed.)The user will then be prompted with brief instructions, as follows:Press <RETURN> to begin display. Press Q to Quit now.Press any key to quit afterwards or press <RETURN> to proceed. Afterwards,press any key to stop the test.Example display:RSSI -83.5 . . . # . . . . . . .RSSI -83.5 . . . # . . . . . . .RSSI -83.5 . . . # . . . . . . .The dots represent a scale from -95 to -50 dBm, as shown below, when lined upwith the examples.-95 -90 -85 -80 -75 -70 -65 -60 -55 -50The maximum value that can be displayed graphically is -50 dBm; if the RSSIvalue is greater than that, the display will plot -50, but display the actualnumerical value at the left side of the screen. For instance:RSSI -45.0 . . . . . . . . . #When 'U' characters appear in place of '#' characters, the unit is uncalibrated,and the values are not necessarily accurate. For instance:
AirLink Pro 64S Installer’s GuideOperations and MaintenanceRev. C - 1/97 4-5RSSI Uncal . . . U . . . . . . .RSSI Uncal . . . U . . . . . . .RSSI Uncal . . . U . . . . . . .The dynamic range of the RSSI measurement circuit tops out at approximately -50 dBm, so higher values will not be displayed accurately. This range shouldbe more than sufficient for its intended purposes - antenna alignment and linkmonitoring/alarm generation.Test in ProgressWhen a test is active, GET STATUS identifies the test by name. Only one testcan be run at a time. If you attempt to start up a second test while a test isrunning, the system terminates the first test and inserts an event message in theevent queue. The possible values for “Test in progress” are: None, LocalLoopback, Remote Loopback, Unknown.RSQRSQ is the Receive Signal Quality specific to data transmission of the radiolink. RSQ is energy correlated with the PN code, whereas RSSI is notcorrelated. It is a measure of specific RF energy and is a figure of merit that isnormalized on a scale of 1 to 10.
AirLink Pro 64S Installer’s GuideOperations and MaintenanceRev. C - 1/974-6Table 4-1Receive Signal QualityRSQ BER(64kbs) RSSI (dBm)10.09.59.08.07.06.25.75.34.33.22.01.00.0<10^-7::::<10^-7<10^-6<10^-5<10^-4<10^-3<10^-2N/AN/A>-83.5-86.5-91.0-94.7-96.1-96.7-97.2-97.8-98.8-99.8100.7-101.8<-104.5NOTE These calculations are relative and not absolute.The RSQ number, when obtained from TEST RSQ, or GET STATUS, isapproximately the same as the voltage at the RSSI test point ranges from 0.0 to10.0.VSWRThe VSWR value can be viewed by issuing the GET STATUS command, and bylooking at the VSWR line on the response screen, as shown below:VSWR: 1.9If VSWR is uncalibrated, the following line will appear:VSWR: N/ANOTE If the unit is uncalibrated, it should be shipped back to Cylink.Alternatively, the VSWR can be displayed continuously by issuing the TESTVSWR command. The user will be prompted to respond Yes or No, as follows:
AirLink Pro 64S Installer’s GuideOperations and MaintenanceRev. C - 1/97 4-7Are you sure? Type Y for yes, N for no >(Press Y to proceed.)The user will then be prompted with brief instructions, as follows:Press <RETURN> to begin display. Press Q to quit. Press any key to quitafterwards.(Press <RETURN> to proceed. Afterwards, press any key to stop the test.)Example display:VSWR 1.9 . #. . . . . . . . .VSWR 1.9 . #. . . . . . . . .VSWR 1.9 . #. . . . . . . . .The dots represent a scale from 1 to 10, as shown below, when lined up with theexamples.1 2 3 4 5 6 7 8 9 10The maximum value that can be displayed graphically is 10.0; if theVSWR value is greater than 10, the display will plot 10, but display theactual numerical value at the left side of the screen, as follows:VSWR 20.0 . . . . . . . . . #If the VSWR value is greater than 99, the display will indicate "greater than99", as follows:VSWR>99.0 . . . . . . . . . #Acquiring Alarm InformationAs alarm events occur, they are signaled through LEDs on the AirLink Pro 64Sand are entered in the event queue. For a complete list of events causing analarm state, see Appendix A.While LEDs and indicators provide an observable indication of alarmconditions and other behavior, the information available through the terminalconnected to the system is easier to access and interpret.
AirLink Pro 64S Installer’s GuideOperations and MaintenanceRev. C - 1/974-8The Event QueueWhen an alarm condition is detected, a message is entered into the AirLink Pro64S event queue. The event queue lists the most current 256 events. An alarmevent is defined as the declaration of an alarm condition or the clearing of analarm condition. The event queue logs the date, time and cause of each alarmevent as it occurs.Events Causing an Alarm StateVarious detectable error and failure conditions are defined for AirLink Pro 64S.These are grouped into two categories:1. Error events that get declared anytime a specific failure condition occurs,such as loss of radio sync.2. Performance events which get declared when some parameter falls below auser-specified threshold, such as RSSI.All events are classified into one of three levels to facilitate filtering orscreening:STATUS error or performance condition restored, test started orstoppedMINOR generally a performance event, or link/unit degradationMAJOR generally an error event, or link lossThe following events put the AirLink Pro 64S into an alarm state and insert analarm entry in the event queue (also refer to Table 2-1, Chapter 2):Receive level below the thresholdTransmit level below the thresholdError count exceeds the thresholdSynthesizer loss of lockRadio sync lossTransmit burst sync lossEvent messages can be viewed on the terminal immediately as theyoccur, and/or upon request to see a log.AIRLINK PRO> Get alarm logSite Name: Sunnyvale 210 SEP 1996 11:50:42 4006: Radio Sync Loss10 SEP 1996 11:40:38 4009: RSQ Below Threshold Thresh:6.0Actual:4.010 SEP 1996 11:30:46 4006: Radio Sync Loss
AirLink Pro 64S Installer’s GuideOperations and MaintenanceRev. C - 1/97 4-910 SEP 1996 11:20:22 800B: 24 HR ES Threshold ExceededThresh: 500 Actual:50110 SEP 1996 11:10:42 8009: 1 HR ES Threshold ExceededThresh: 450 Actual:45110 SEP 1996 11:00:14 4009: RSQ Below Threshold Thresh:6.0Actual:4.009 SEP 1996 18:19:42 4006: Radio Sync Loss09 SEP 1996 18:09:00 4009: RSQ Below Threshold Thresh:6.0Actual:4.0OKViewing the Event QueueTo view the event queue on the terminal as it occurs, type the followingcommand at the AirLink Pro 64S prompt:AIRLINK PRO 64S> Set alarm reporting immediateto view the event queue only when you query for it, use the operand request.To filter the level at which alarms get reported, type the following commandat the prompt:AIRLINK PRO 64S> Set alarm level (Major, Minor, or Status)Regardless of the setting of the Set Alarm level parameter, the Major and theMinor alarm LEDs are always updated.When the event queue contains alarm messages, the most recent message isdisplayed at the top of the list, with the most recent time and date.When there are more messages than will fit on one screen, you can page throughthe messages by pressing <Return> to go forward one screen, or <B><Return> togo back one screen. Press <Q> to exit (quit) the event queue display.To view the event queue of the remote unit (in a point-to-point configuration),use the command:AIRLINK PRO 64S> remote get alarmsResetting the Event QueueTo reset the event queue for the local unit, type the following command:AIRLINK PRO > reset alarms
AirLink Pro 64S Installer’s GuideOperations and MaintenanceRev. C - 1/974-10The system prompts you to confirm the event queue reset request:AIRLINK PRO 64S> reset alarmsReset alarms: Are you sure? (Y/N)When you enter a y (yes) to confirm the request, the system clears the eventqueue. If you enter an n (no) or just press <Return>, the system ignores the eventqueue reset request. If you query the event queue at this point, you should seeonly one event, Alarm Queue Reset.You can reset alarms for the remote unit (only for a point-to-point link), byissuing the command: AIRLINK PRO 64S> remote reset alarmsAcquiring Performance InformationEach AirLink Pro 64S system maintains an internal database of status andperformance information that it uses, in part, to derive the events that arestored in the event queue. The performance information categories include:❚Errored Second (ES) counts (1-hour and 24-hour)❚Unavailable Second (UAS) counts (1-hour and 24-hour)❚Receive Signal Quality (RSQ)Viewing Performance InformationTo view the performance information for the local unit, type the followingcommand at the AirLink Pro 64S prompt:AIRLINK PRO 64S> Get performanceThe system displays a list of performance information similar to the following:AIRLINK PRO 64S> Get performanceSite Name:QRSS BER: N/A1 HR ES: 11 HR UAS: 124 HR ES: 224 HR UAS: 3RSQ: 9.9Date/Time: 12 Sept 1996 13:21:30
AirLink Pro 64S Installer’s GuideOperations and MaintenanceRev. C - 1/97 4-11The significance of these information categories is explained in the followingsections.QRSS TestReplaces the transmitted data payload with a standard QRSS test pattern.The unit's own QRSS detector/counter attempts to lock onto an incoming QRSSpattern in the incoming payload; once lock is acquired, individual errors arecounted and an overall BER is computed.A typical test scenario is a bi-directional test with two units in a point-to-pointconfiguration (master and slave). Point-to-multipoint is not supported. Eachunit sends and receives the pattern, and records errors appearing in the incomingpattern.To invoke the test, typeAIRLINK PRO>BOTH TEST QRSSThe unit will prompt you to ask if you are sure, as follows. Invoking the testwill disrupt the payload link.Are you sure? Type Y for yes, N for no. >(Press Y to proceed.)To view the test results (received bit error rate, BER) at the local unit, typeAIRLINK PRO>GET PERFORMANCEThe BER will be displayed as a line in the performance screen, for instance:QRSS BER: < 10E-7To view the BER at the remote unit, typeAIRLINK PRO> REMOTE GET PERFORMANCETo reset the error count and BER to zero, at the local, remote, or both unitsrespectively, typeAIRLINK PRO>RESET PERFORMANCEorAIRLINK PRO>REMOTE RESET PERFORMANCEor
AirLink Pro 64S Installer’s GuideOperations and MaintenanceRev. C - 1/974-12AIRLINK PRO>BOTH RESET PERFORMANCEWhen the QRSS mode is first entered, the receiver portion will initially entera hunt mode; attempting to view the data during this phase will result in thedisplay of the message "Unavailable".Units at each end of a link can both send QRSS and measure the link statisticsin each direction independently. Also, one of the units can be placed in QRSSmode, and the other can be placed in remote loopback. See next section onRemote Loop Test.NOTE Remember, both cannot be used in a multipoint network unless RTS is controlled (by thehost). See Figure 4-6.Errored Seconds (ES)An errored second is defined as any one-second interval during which there is aCRC-16 error (Cyclic Redundancy Check error-checking system). Erroredseconds can be asynchronous; they do not have to be correlated with real time.An Errored Seconds (ES) total is maintained in a data base for the previous onehour and the previous 24 hours.The one-hour and 24-hour errored second counters are both updated each time anerrored second occurs. The one-hour counter is cleared to zero one hour after thefirst errored second is logged. The 24-hour counter is cleared to zero 24 hoursafter the first errored second is logged.Unavailable Seconds (UAS)An unavailable second is the number of seconds in which the radio signal islost. In all other aspects the same as Errored Seconds (above).RSQReceive Signal Quality (RSQ) is a figure of merit that is normalized on a scaleof 1 to 10, and is a function of the receive signal-to-noise ratio and signal-to-interference ratio. Specifically, it represents the data quality of the link. Astrong signal that is severely corrupted with interference results in a normalreceive signal indication and a low RSQ number.Resetting Performance CountersTo reset the 1-hour and 24-hour ES and UAS counters, type the followingcommand at the AirLink Pro 64S prompt:
AirLink Pro 64S Installer’s GuideOperations and MaintenanceRev. C - 1/97 4-13AIRLINK PRO 64S> reset performanceThe system prompts you to confirm the reset request:AIRLINK PRO 64S> reset performanceReset performance: Are you sure? When you enter a y (yes) to confirm the request, the system clears the ES andUAS counters. If you enter an N (no) or just press <Return>, the system ignoresthe reset request. If you query performance at this point, you should see that the1-hour and 24-hour ES and UAS counters have been reset.Diagnostic ToolsThe AirLink Pro 64S provides two loopback tests as diagnostic tools:❚Local Loop test❚Remote Loop testThe loopback tests are initiated by commands entered through the terminaluser interface.NOTE Only one test can be active at a time. If you attempt to start up a second test while a testis running, the system terminates the first test and activates the second test.NOTE You can initiate a loopback test for the local unit or the remote unit, but only one loopbacktest can be active at a time.Figure 4-1 shows a generalized view of the loopback test types. Each of theloopback tests and the conditions that apply during the test are described inthe following sections.
AirLink Pro 64S Installer’s GuideOperations and MaintenanceRev. C - 1/974-14Figure 4-1AirLink Pro 64S Loopback TestsLocal Loop TestA local loopback loops the data signal back toward the DTE at the linetransceiver. When a local loopback is in progress, a stream of ones istransmitted toward the RF module in place of the data payload. This test doesnot exercise any hardware on the digital module except the line drivers.
AirLink Pro 64S Installer’s GuideOperations and MaintenanceRev. C - 1/97 4-15Figure 4-2AirLink Pro 64S in Test Loopback LocalTo initiate a local loopback at the local unit (see Figure 4-2), type thefollowing command at the prompt:AIRLINK PRO 64S> test loopback localThe system prompts you to confirm the loop test:AIRLINK PRO 64S> test loopback localAre you sure? Type Y for Yes and N for NoWhen you enter a Y (yes) to confirm the request, the system starts the loop test.OKAIRLINK PRO 64S>To set the far end unit to a local loopback test (see Figure 4-3), type thefollowing command:AIRLINK PRO 64S> remote test loopback localThe system prompts you to confirm the loop test:Sending command downline. Please wait…Are you sure? Type Y for Yes and N for No
AirLink Pro 64S Installer’s GuideOperations and MaintenanceRev. C - 1/974-16When you enter a Y (yes) to confirm the request, the system starts the loop test.OKAIRLINK PRO 64S>To terminate a loopback test:AIRLINK PRO> Reset TestFigure 4-3AirLink Pro 64S in Remote Test Loopback LocalRemote Loop TestA remote loopback loops the signal at the far end back towards the near end.When a remote loop is in progress, a stream of ones is transmitted toward theDTE in place of the data payload, and the receive clock is used to clock thetransmit data. This test is an end-to-end test of the link and exercises all thehardware on the digital and RF modules of both sides of the link. In a point-tomultipoint set up, the DTE interface signal “RTS” must be asserted at both endsof the link for this test to operate properly. In a point-to-point link the RTS isignored in the far end.To initiate a remote loopback at the far end unit from the near end unit (seeFigure 4-4), type the following command at the prompt:AIRLINK PRO 64S> test loopback remote
AirLink Pro 64S Installer’s GuideOperations and MaintenanceRev. C - 1/97 4-17The system prompts you to confirm the loop test:AIRLINK PRO 64S> test loopback remoteAre you sure? Type Y for Yes and N for NoWhen you enter a Y (yes) to confirm the request, the system starts the loop test.OKAIRLINK PRO 64S>Figure 4-4AirLink Pro 64S in Test Loopback RemoteTo start a remote loopback test at the near end unit (see Figure 4-5) type thefollowing command at the prompt:AIRLINK PRO 64S> Remote test loopback remoteTo terminate a loopback test:AIRLINK PRO> Reset TestIf you enter an N (no) or just press <Return>, the system ignores the loop testrequest.If you query the status information while the test is running, you can verify thatthe test is running:
AirLink Pro 64S Installer’s GuideOperations and MaintenanceRev. C - 1/974-18AIRLINK PRO 64S> Get statusSite Name:Test in Progress: Remote LoopDTE Status: RS-232Radio Sync Loss: NOBurst Sync Loss: NORSSI: N/ARSQ: 10.0VSWR: N/ADate/time: 15 Sept 1996 12:02:63Figure 4-5AirLink Pro 64S in Remote Test Loopback RemoteLoopback Tests for Multipoint NetworksIt is possible to execute loopback tests for point-to-multipoint applications,however there are some interface requirements for the external systems. Sincemultiple slaves may communicate with a single master, it is necessary, as it isduring normal operation, to ensure that only one slave is transmitting at aparticular time. In both cases, this is achieved by the selective assertion ofRequest-to-Send (RTS) on the DTE interface. As shown in Figure 4-6, one of thethree remote slaves is performing a loopback test due to the assertion of RTS bythe terminal. The other two slaves receive a negated RTS signal, and are nottransmitting.
AirLink Pro 64S Installer’s GuideOperations and MaintenanceRev. C - 1/97 4-19The assertion and negation of RTS must be handled by the user’s equipmentthrough the normal data communication channel. If the Host wishes to run aloopback test at the second remote slave, it must command the first slave tonegate RTS and then command the second slave to assert RTS. When changingloopback nodes, it is necessary to exit loopback mode, since the commandsthrough the normal data channel won’t get through while in this mode (astream of one’s is transmitted instead).A typical command sequence follows:To initiate a loopback test for Link #1 (where Host sends commands to slave #1to assert RTS, other slaves to negate RTS):AIRLINK PRO> test loopback remote(The first link is now in Loopback mode)To initiate a loopback test for link #2:AIRLINK PRO> reset test(Host sends commands to slave #1 to negate RTS and slave #2 to assert RTS)AIRLINK PRO> test loopback remote(Second link is now in loopback mode)To terminate a loopback test:AIRLINK PRO> reset test
AirLink Pro 64S Installer’s GuideOperations and MaintenanceRev. C - 1/974-20Figure 4-6Asserted RTS in Multipoint ConfigurationMaintenance of Standby BatteryAll parameters are saved in a non-volatile memory which is normally poweredfrom the main power source. During power outages, a battery keeps thememory. This battery is molded into the memory chip and cannot be replaced.The battery will keep the memory for over 10 years of power outage, or shelflife if the AirLink is a spare unit.To verify the battery is good, simply set a parameter, like Time or Date, andpower down the AirLink. If the Date/Time is correct on power up, the batteryis good. If the battery ever fails, return the AirLink Pro 64S to the factory.
Rev. B - 2/97 A-1AAPPENDIX PPENDIX AAMessagesMessagesThis chapter describes messages generated by AirLink Pro 64S.Inside this chapter:General Information ............................................................ A-2Major Alarm Messages ....................................................... A-3Minor Alarm Messages ....................................................... A-3Status Messages ................................................................ A-4
AirLink Pro 64S Installer’s GuideMessagesRev. B - 2/97A-2General InformationAirLink Pro 64S messages are accessible through a terminal device connected toone of the Network Management ports on the AirLink Pro 64S. All messages arecoded with a four-digit alphanumeric code so that higher-level networkmanagement software can detect the message. These messages are grouped intothe following categories:❚Major Alarm messages❚Minor Alarm messages❚Status messagesMessages are grouped according to severity level. Major alarm messages are themost severe as these are service-affecting failures. The Status messages are theleast severe. When you enter GET ALARMS LOG command, the systemdisplays a list of alarm and event information similar to the following:47: 4000 10 Aug 96 18:20:37 1 HR ES Threshold46: 4004 10 Aug 96 18:40:17 24-HR ES Threshold Exceeded45: C001 10 Aug 96 18:40:19 RSSI Below Threshold : : :24: 8001 11 Aug 96 03:15:52 DLC Timeout on Final Retry (01)The following information describes the message format:The first entry is the number in the list, followed by the message code, datestamp, time stamp and the message text. The most recent message is displayedat the top of the list, with the most recent time and date.When there are more messages than will fit on one screen, you can page throughthe messages by pressing <Return> to go forward one screen, or <b> to go backone screen. Press <Q> to exit (quit) the event queue display.
AirLink Pro 64S Installer’s GuideMessagesRev. B - 2/97 A-3Major Alarm MessagesTable A-1Major Alarm MessagesCode Message0003 DTE Interface Voltage Error4006 Radio Sync Loss4007 System Reset4013 No Burst Sync Source4014 +/- 12V Supply Out of RangeMinor Alarm MessagesThese messages are generally conditions that can be resolved by an operator inthe field.Table A-2Minor Alarm MessagesCode Message4009 RSQ Below Threshold Threshold: xxx* Actual: xxx400A RSSI Below Threshold Threshold: xxx Actual: xxx400B VSWR Above Threshold Threshold: xxx Actual: xxx4011 Primary Burst Sync Source Loss4012 Backup Burst Sync Source Loss8009 1-HR ES Threshold Exceeded Threshold: xx Actual: xx800A 1-HR UAS Threshold Exceeded Threshold: xx Actual: xx800B 24-HR ES Threshold Exceeded Threshold: xx Actual: xx800C 24-HR UAS Threshold Exceeded Threshold: xx Actual: xx8012 CFG dB test failed8013 MFG dB test failed* where xx is a value. This value can be set for the threshold.
AirLink Pro 64S Installer’s GuideMessagesRev. B - 2/97A-4Status MessagesTable A-3Status MessagesCode Message4008 Powered Up8001 QRSS Test Started8002 Local Loop Test Started8003 Remote Loop Test Started800D Modem Busy800E No Answer800F No Modem8010 No DialtoneC000 Event Queue ResetC001 RSSI Recovered Threshold: xx Actual:xxC005 Radio Sync RecoveredC006 All Tests ClearedC007 Reset to DefaultsC00F RSQ Recovered Threshold: xx Actual:xxC010 VSWR Recovered Threshold: xx Actual:xxC011 Primary Burst SyncSource RecoveredC012 Backup Burst syncSource RecoveredC013 Burst Sync Recovered
Rev. B - 2/97 B-1AAPPENDIX PPENDIX BBSpecificationsSpecificationsThis appendix is the reference for the specifications of the AirLink Pro64S system.Inside this chapter:General Specifications........................................................B-2Interface Specifications.....................................................B-3Signal to Pin Assignments..................................................B-8
AirLink Pro 64S Installer’s GuideSpecificationsRev. B - 2/97B-2General SpecificationsTable B-1Operating and Environmental SpecificationsParameter SpecificationsOperating Temperature: 0 to 50° C (32° to 122° F)Storage Temperature: -40 to 66° C (ambient)Operating Humidity 10 to 95% RH non-condensingStorage Humidity 10 to 95% RH non-condensingElectrostatic Discharge(ESD) IEC 801-2 using limits prescribed by 50082-1ElectromagneticCompatibility (EMC) IEC 801-3, Radiated RF ImmunityIEC 801-4, Electronic Fast Transient ImmunityShock Transportation/Handling Shock:Drop Test per NSTA Project 2AOperation Shock:Bellcore TR-TSY-000487, Section 5.1.4.9,Subsection IIA, (Drop Tests for Unpacked HousingWeighing 50 lb. or less).Vibration Operational Vibration:Bellcore TR-TSY-000487, Section 5.1.4.11(Vibration Test- Low Level).Transportation Vibration:ASTM D 4728 Random Vibration TestingTruck/Air Spectrum (IG, 5-200 Hz) according to thegeneral requirements of ASTM D 4728.
AirLink Pro 64S Installer’s GuideSpecificationsRev. B - 2/97 B-3Table B-2Mechanical Specifications (Refer to Figure 1-1)Parameter SpecificationsDimensions Width 8.3 inches 211 mmHeight 2.6 inches 66 mmDepth 10 inches 254 mmWeight 5 pounds 2.3kgTable B-3Power SpecificationsParameter SpecificationExternal AC Power Supply:AC InputAC Power CableDC OutputDimensionsWeight100-250 VAC @ 50/60 Hz, 0.3-0.7AAccording to model ordered+5, ± 12 VDC, cable terminated with 5-pin male DINConnectorHeight 2.00 inches (50.8 mm)Width 3.40 inches (86.4 mm)Length 5.87 inches (149.1 mm)1.3 pounds (.6 kg)Maximum Power Consumption:(power supply plus AirLink) AC Power Supply - 23 WattsDC Power Supply - 21 WattsInterface SpecificationsThis section contains specifications for the two major interfaces of the AirLinkPro 64 S:❚DTE interface❚Radio interface
AirLink Pro 64S Installer’s GuideSpecificationsRev. B - 2/97B-4DTE SpecificationsTable B-4DTE SpecificationsParameter SpecificationProtocol TransparentSynchronous Mode DTE Clock: (TT, Input to AirLink)Frequency: Nominal rate ± 70 ppmMax. Jitter: 10 UIpp @ 300 Hz, and 0.2 UIpp @ 10 kHzDCE Clock: (ST or RT, Output from AirLink)Smooth, 50% duty cycleFrequency: Nominal rate ± 50 ppmData Rate 64, 56, 19.2, 9.6, 4.8Asynchronous Mode 8-, 9-, 10-, and 11-bit character size.Complies with ITU - T V.14 specification except thatthe baud rate of the RD lead is +1.5 % over thenominal rate at all times. Data rate 19.2, 9.6, and4.8By means of oversampling for rates up to 16 kbps.Error CorrectionThe error correction scheme used in the AirLink modem is a majority votingalgorithm that applies only to the subrate data in synchronous andasynchronous modes. The redundancy ratio number is 3 and provides 2-3 dB ofcoding gain. Error correction takes place when the unit is set for one of thefollowing standard data rates: 4.8, 9.6, and 19.2 kbps. Error correction for theserates is active for both synchronous and asynchronous operation modes. If theunit is set for asynchronous mode, it first converts the data to synchronous andthen repeats it three times for the error correction algorithm. In synchronousmode, the error correction process is the same, but there is no async-to-syncconversion.The error correction can also be utilized when sending asynchronous data of anynon-standard rate of up to (and including) 4.8 kbps. This is achieved by settingthe unit for 19.2 kbps synchronous mode, which then allows it to oversamplethe asynchronous data. This is in compliance with ITU-T V.14.
AirLink Pro 64S Installer’s GuideSpecificationsRev. B - 2/97 B-5Radio InterfaceTable B-5General SpecificationsParameter SpecificationFrequency Range 2.400 - 2.4835 GHz (S-Band)Radio Technology Spread Spectrum using Direct SequencePN Sequence Length 32 bitsModulation Technique Minimum Shift Keying (MSK)Channel Bandwidth 4.0 MHzSync Word Length 32 bitsProcessing Gain 12 dBSystem Gain (not including antenna gain) 120 dBRadio Protocol Timed Division Duplexing (TDD)Burst Period 8.5 millisecondsBoot-up Time 15 secondsLithium Battery 10 year storage life in the absence of power tothe AirLink unit.MTBF* (Mean Time Between Failure) AirLink alone Power Supply (AC/DC) CombinationActual experience of AirLink Classic S-Bandfield returns is MTBF of 28 years.20 years12 years7.5 years*Calculated using the Bellcore technical reference TR-NWT-000332, Issue 4, September1992, assuming ambient temperature is 25 degrees Celsius.
AirLink Pro 64S Installer’s GuideSpecificationsRev. B - 2/97B-6Table B-6TransmitterParameter SpecificationsNumber of Channels 15 or 20 software selectableFrequency source SynthesizedBandwidth 4.0 MHzNominal Output Impedance 50 OhmsCarrier Frequency Stability +/- 10 ppmOutput PowerTolerance 28 dBm (650 mW) max with 28 dB of dynamic range+/- 1 dB over all RF channels+/- 1 dB from 0 to 500 CTable B-7AChannel Plan 1Channel Center Frequency (MHz)12407.067 MHz2 2412.266 MHz3 2417.465 MHz4 2422.664 MHz5 2427.863 MHz6 2433.062 MHz7 2438.261 MHz8 2443.459 MHz9 2448.658 MHz10 2453.857 MHz11 2459.056 MHz12 2464.255 MHz13 2469.454 MHz14 2474.653 MHz15 2479.851 MHz
AirLink Pro 64S Installer’s GuideSpecificationsRev. B - 2/97 B-7Table B-7BChannel Plan 2Channel Center Frequency (MHz)12404.468 MHz2 2408.367 MHz3 2412.266 MHz4 2416.165 MHz5 2420.065 MHz6 2423.964 MHz7 2427.863 MHz8 2431.762 MHz9 2435.661 MHz10 2439.560 MHz11 2443.459 MHz12 2447.359 MHz13 2451.258 MHz14 2455.157 MHz15 2459.056 MHz16 2462.955 MHz17 2466.854 MHz18 2470.753 MHz19 2474.653 MHz20 2478.552 MHzTable B-8ReceiverParameter SpecificationsAcquisition Time less than 8.5 millisecondsNoise Figure 5 dB maximumNominal Input Impedance 50 OhmsReceiver Sensitivity(@ BER 1 x 10-6)-98 dBm minimum for all factors (-92 dBm typical)± 1 over channels± 1 over temperatureReceive Overload Threshold > -10 dBmUnfaded BER < 10-10
AirLink Pro 64S Installer’s GuideSpecificationsRev. B - 2/97B-8AirLink Data Interface Standards BibliographyCylink AirLink Modems conform to the electrical and mechanical interfacespecifications contained in the data and telecommunication standards listed inthe following table.Table B-9Data Interface StandardsStandardNumber Title OrganizationEIA/TIA-232-E Interface Between Data Terminal Equipment and DataCircuit-Terminating Equipment Employing Serial BinaryData Interchange (ANSI/EIA/TIA-232-E-91) (July, 1991)Electronic IndustriesAssociationV.11 Recommendation V.11 (03/93) - Electricalcharacteristics for balanced double-current interchangecircuits operating at data signaling rates up to 10 Mbit/s.InternationalTelecommunications UnionV.35 Recommendation V.35 (1976) - Data Transmission at 48Kilobauds per second using 60-108 kHz Group BandCircuits.InternationalTelecommunications UnionEIA/TIA-530-A High Speed 25-Position Interface for Data TerminalEquipment and Data Circuit-Terminating Equipment,Including Alternative 26-Position Connector(ANSI/EIA-530-A-92) (June, 1992)Electronic IndustriesAssociationSignal-to-Pin AssignmentsThis section presents the pin assignments and functions for connectors andcaptive-wire terminal block on the AirLink Pro 64S:❏Network Management❏AC Power Connector❏Antenna Connector❏Burst Sync Connector❏DTE ConnectorsNOTE Occasionally, industry names and terms change. For example, the EIA RS-xxx standardsare now referred to as the EIA/TIA-xxx standards, a change that reflects their acceptanceas standards by the Electronic Industries Association (EIA) and TelecommunicationsIndustry Association (TIA).Network ManagementConnector Location: RS-232C/RS-485. AirLink Pro 64S Rear panelConnector Type: (Two) DB 9 Female Connectors
AirLink Pro 64S Installer’s GuideSpecificationsRev. B - 2/97 B-9Figure B-1DB 9 Female Network Management ConnectorNOTE The Network Management ports are “wired” as DTE (Data Terminal Equipment). Thisallows for a standard “straight through” cable connection for any modem (modems arewired as DCE Data Communications Equipment). Since the terminal and NetworkManagement ports are “wired” as DTE, the user must supply a “null modem” cable whenconnecting the twoTable B-10Terminal ConnectionPin Circuit Description Usage1100 Received Line Signal Detect to AirLink Pro2 104 Received Data to AirLink Pro3 103 Transmitted Data from AirLink Pro4 108/2 DTE ready from AirLink Pro5 102 Signal Common circuit ground6 107 DCE ready to AirLink Pro7 105 RTS from AirLink Pro8 106 CTS to AirLink Pro9 125 Ring Indicator not usedAC Power ConnectorConnector Location: AirLink Pro 64S Rear PanelConnector Type: 5-pin DIN female
AirLink Pro 64S Installer’s GuideSpecificationsRev. B - 2/97B-10NOTE Power cords are available for the United Kingdom, Australia, and Europe through a CylinkDistributor or Cylink.Antenna ConnectorConnector Location: AirLink Pro 64S Rear PanelConnector Type: N-type femaleBurst Sync ConnectorConnector Location: AirLink Pro 64S Rear PanelConnector Type: 6-position captive-wire terminal (2) identical 2-wire balanced networks, implemented with 4-wire cable of 2twisted pairs;RS-485 (balanced, differential, tri-stateable) drivers/receivers;loads: 6424 AWG twisted pair cables, Category 3 or better data cableDTE ConnectorsConnector Location: AirLink Pro 64S Rear PanelConnector Type: DB25 (female) for RS-232 interfaceDB25 (female) for V.35 and EIA-530 interfaceFigure B-2DB 25 Female DTE Connector
AirLink Pro 64S Installer’s GuideSpecificationsRev. B - 2/97 B-11Table B-11RS-232 Pin AssignmentsPin Circuit Description Usage1Shield Ground Signal Quality Ground2 103 Send Data to AirLink Pro3 104 Receive Data from AirLink Pro4 105 RTS to AirLink Pro5 106 CTS from AirLink Pro6 107 Data Set Ready active with power on7 Signal Ground8 109 Data Carrier Detect from AirLink Pro15 114 Send Timing Clock from AirLink Pro17 115 Receive Timing Clock from AirLink Pro20 108 Data Terminal Ready Ignored24 113 Terminal Timing Clock to AirLink Pro25 Test Pin Signal Quality Voltage
AirLink Pro 64S Installer’s GuideSpecificationsRev. B - 2/97B-12Table B-12EIA-530 and V.35 Pin AssignmentsPin Signal Circuit Description Usage1Shield Ground2 BA 103 Send Data (TD) to AirLink Pro3 BB 104 Receive Data (RD) from AirLink Pro4 CA 105 RTS to AirLink Pro5 CB 106 CTS from AirLink Pro6 107 Data Set Ready active with power on7 SG 102 Signal Ground8 CF 109 Data Carrier Detect from AirLink Pro9 /DD Receive Timing Inverse from AirLink Pro10 /CF 122 RLSD Inverse from AirLink Pro11 /DA Terminal Timing Inverse to AirLink Pro12 /DS Send Timing Inverse from AirLink Pro13 /CB 121 CTS Inverse from AirLink Pro14 /BA 118 Send Data Inverse to AirLink Pro15 DS 114 Send Timing (ST) from AirLink Pro16 /BB 119 Receive Data Inverse from AirLink Pro17 DD 115 Receive Timing (RT) from AirLink Pro19 /CA 120 RTS Inverse to AirLink Pro20 108 Data Terminal Ready enable Interface22 Data Set Ready Inverse Active with power on24 DA 113 Terminal Timing to AirLink Pro
AirLink Pro 64S Installer’s GuideSpecificationsRev. B - 2/97 B-13Crossover Data Cable SpecificationsTable B-13EIA 530 25-Pin Male ConnectorsConnector #1 Connector #2Pin Pin Description Pin Pin Description1Shield Ground 1 Shield Ground2Send Data <BA> TD 3 Receive Data <BB> RD14 Send Data </BA> TD 16 Receive Data </BB> RD3Receive Data <BB> RD 2 Send Data <BA> TD16 Receive Data </BB> RD 14 Send Data </BA> TD7 Signal Ground 7 Signal Ground4Request To Send <CA> RTS 8 RSLD <CF> DCD19 Request To Send </CA> RTS 10 RSLD </CF> DCD8RSLD <CF> DCD 4 Request To Send <CA> RTS10 RSLD </CF> DCD 19 Request To Send </CA> RTS24 Terminal Timing <DA> TT 17 Receive Timing <DD> RT11 Terminal Timing </DA> TT 9 Receive Timing </DD> RT17 Receive Timing <DD> RT 24 Terminal Timing <DA> TT9Receive Timing </DD> RT 11 Terminal Timing </DA> TTTable B-14RS-232 25-Pin Male ConnectorsConnector #1 Connector #2Pin Pin Description Pin Pin Description1Shield 1 Shield2 Send Data TD 3 Receive Data RD3 Receive Data RD 2 Send Data TD4Request To Send RTS 8 Data Carrier Detect DCD7Signal Ground 7 Signal Ground8 Data Carrier Detect DCD 4 Request To Send RTS17 Receive Timing RT 24 Transmit Timing TT24 Transmit Timing TT 17 Receive Timing RT25 Do not connect 25 Do not connect
AirLink Pro 64S Installer’s GuideSpecificationsRev. B - 2/97B-14System DelayThe maximum System Delay is defined as the maximum time between thearrival of a data bit at the transmitter’s DTE port and when it departs thereceiver’s DTE port. The system delay is consistent for all RTS/CTS delaysettings.Table B-15Point-to-Point (Slave to Master) Maximum System Delay in MillisecondsAsynchronous Synchronous64K 6.9 ms56K 6.9 ms19.2K 7.6 ms 6.9 ms9.6K 8.4 ms 6.9 ms4.8K 9.8 ms 6.9 msCode of Federal RegulationsTelecommunication47 Parts 0 to 19Revised copy as of October 1994❚Part 15; Subpart B, Unintentional Radiators’❚Part 15; Sub part C, Intentional RadiatorsFor spread spectrum radios, direct sequence system consult 15.247, Section 2
Rev. B - 2/97 C-1AAPPENDIX PPENDIX CCWorksheetsWorksheetsThis appendix contains two sets of worksheets to help the user toconfigure the AirLink Pro 64S.
AirLink Pro 64S Configuration WorksheetPair ID/Name— Master: Slave: Serial Number— Master: Slave: Pair Location— Master: Slave: Antenna Type: Cable Length: PARAMETER VALUES MASTER SLAVEAdministrative ParametersSite Name ≤ 60 alphanumeric chars (Blank)Site Name, Master:Site Name, Slave:PasswordDate/Time dd/mm/yy hh:mm:ssLink ParametersApplication 1. Slave unit in a point-to-point link2. Master unit in a point-to-point link3. Master unit at a repeater site4. Reference master unit at a hub5. Backup master unit at a hub6. Subordinate master unit at a hub7. Master unit in a multipoint link8. Slave unit in multipoint linkPN Code 1 to 8 (default: 1)RF Channel 1 to 20 (default: 1)RF Plan Channel Plan 1 (1-15)Channel Plan 2 ((1-20) (default: 20)RF Channel Plan 2 (MSK 64 - 20 channels) (default: 20 chan)Comm Mode Synchronous (default: Synch )Asynchronous 8-bit, 9-bit, 10-bit, and 11-bitData Rate 64 or 56 synchronous19.2, 9.6, and 4.8 asynchronous orsynchronous(default: 64 kbps )Burst Timing External, Free Run, and Receive (default: FreeRun)HUB Sync Single or Dual (default: Single )Tx Clock Source External or Internal (default: Internal )RTS Source Internal or External (default: External )RTS Delay 0, 17, 34, and 127.5 (0 msec)DTE Mode Disabled, RS-232, EIA-530, and V.35 (default:RS-232)DTE Protect Enabled, disabled (default: Disabled )RF Power 0 dBm .. 28 dBm (default: 0 dBm)
Alarm Control ParametersAlarm Reporting Request or Immediate (default Request )Alarm Level Status, Minor, or Major (Default Status )Alarm Holdoff 0 - 600 (seconds)Burst Mode, Output, and TimingThreshold RSSI -95 to -50 (dBm)Threshold RSQ 1 to 10 (dBm)Threshold 1 Hour ES 1 to 99Threshold 1 HourUAS 1 to 99Threshold 24 HourES 1 to 999Threshold 24 HRUAS 1 to 999
Configuration Notes
AirLink Pro 64S Installer’s GuideWorksheetsRev. B - 2/97C-2
Rev. B - 2/97 D-1AAPPENDIX PPENDIX DDCommandsCommandsThis appendix contains a list of the available command keywords andoperands that can be used to set or request configuration parametervalues, or to request configuration parameter values, or to requestconfiguration or status information.
AirLink Pro 64S Installer’s GuideCommandsRev. B - 2/97D-2Command Keyword ListCommand keywords and operands can be used to set or request configurationparameter 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 requiredbetween keywords but the type (i.e. space or tab) and the number are notchecked. Keywords in parentheses are optional; such words need not be typedfor the command to execute.BOTHCALLDISCONNECTEXPERTHELP(LOCAL)LOGINLOGOUTREMOTESET ALARM HOLDOFFALARM LEVELALARM REPORTINGAPPLICATIONBSYNC ABSYNC BBURST MODEBURST OUTPUTBURST TIMING (SOURCE)COMMCONNECTIONDATADATEDIAL HOLDOFFLEVELPULSERETRYTONEDTEHUB_SYNCMODEM PHONEMODEM MODE
AirLink Pro 64S Installer’s GuideCommandsRev. B - 2/97 D-3RATEPASSWORDPNRANGEREPEATRF PLANRF POWERRF SLEEPRTS THRESHOLDRTS DELAYRTS SOURCESITETIMETT CLOCK (DETECT)TX CLOCK (SOURCE)TX VCXOPHONE 1 2 REPEAT COUNT RINGCOUNTGET ALARM LOGAPPLICATIONCOMMCONFIGURATIONCONNECTIONDATADATEDIALDIGITALDTEHUB_SYNCLIMITSMODEMPERFORMANCEPHONEPNREPEATREVISIONRFRINGCOUNTRS232RSQRSSIRTSSTE
AirLink Pro 64S Installer’s GuideCommandsRev. B - 2/97D-4STATUSTESTTHRESHOLDTIMETOPTXVSWRRESET ALARMSDEFAULTPERFORMANCEQRSSSYSTEMTESTTEST LOOPBACK LOCALREMOTEQRSSRSSIRSQVSWR
Rev. B - 2/97 E-1AAPPENDIX PPENDIX EEGlossaryGlossaryThis glossary provides definitions of some of the more importantspecialized terms and acronyms associated with the operation of theAirLink Pro 64S.
AirLink Pro 64S Installer’s GuideGlossaryRev. B - 2/97E-2Antenna A transmitting or receiving device for radiated waves. Theantenna acts as a form of matching transformer for waves along aline and waves in space so that the maximum transfer of energycan be achieved.Antenna Gain Antenna gain is a measure of the efficiency of an antennacompared with the efficiency of a standard reference antenna.The efficiency is measured in terms of the power radiated orreceived in a given direction as compared with the standardunder the same conditions.Asynchronous DataTransmission The transmission of data in which each character is a self-contained unit with its own start and stop bits and intervalsbetween characters may be uneven.Bit Error Rate (BER) The measure of the frequency of errors in a digital transmission.Burst Timing A form of timing in which the receiving device is synchronized tothe transmitting device by receiving bursts of data.Cable Loss The amount of signal attenuation (loss) for a particular type ofcable of a given length.Channel A specified frequency slot within the specified frequency bandused for transmission.CRC (Cyclic RedundancyCheck) A check performed on data to see if an error has occurred intransmitting, reading or writing of the data.DCE Data Circuit Equipment—a communications device thatestablishes, maintains, and terminates a session on a network.DTE Data Terminating Equipment—a communications device that isthe source or destination of signals on a network.Fade Margin The measure of how much signal attenuation the system canendure without dropping below the minimum desired BER level.Free Space Path Loss The loss of power of a radiated signal as it travels through space.Full Duplex Transmission in two directions simultaneously.Half Duplex A circuit designed for data transmission in both directions, but notat the same time.
AirLink Pro 64S Installer’s GuideGlossaryRev. B - 2/97 E-3Handshake Signal The series of signals between a computer and another peripheraldevice (for example, a modem) that establishes the parametersrequired for passing data.Hub Configuration A system configuration in which several masterAirLinks/terminals are co-located. Usually, one acts as thesynchronizing modem to the others at the site.LED A light-emitting diode is a device that emits a visible light onthe front of the AirLink modem.Line-of-Sight An unobstructed view from the transmit antenna to the receiveantenna.Master Modem The master modem is the modem which controls the slavemodem. The master modem always transmits the initial burst towhich the slave modem must respond. The master modem is theonly modem capable of initiating any activity on its own.Modem An acronym for MOdulator - DEModulator. A device used toconvert digital signals into a form suitable for long distancetransmission, and to reconvert received signals.Omnidirectional Antenna An antenna with a radiation pattern that is the same in allhorizontal directions.Over Sampling The process of sampling a signal at a higher than the minimumacceptable rate to ensure greater accuracy.Overlapping Channels A situation in which the operating channel frequency bandwidthof one transmitting device shares part of the frequencybandwidth of another transmitting device.Path Loss The total amount of radio signal attenuation (loss) between thetransmitting antenna and the receiving antenna; the sum ofattenuation caused by obstacles located in the path and the freespace path loss.Point-to-PointConfiguration A system configuration in which only one master modemcommunicates with its one slave modem between the two sites.Point-to-MultipointConfiguration A system configuration in which one master modem communicateswith one or more slave modem.Polling A controller checks stations (or terminal nodes) at intervals,according to a predefined list, to see if each respective stationhas anything to send. If a station (or terminal node) has data, itsends the data, and then the controller moves to the next station.
AirLink Pro 64S Installer’s GuideGlossaryRev. B - 2/97E-4PN Sequence An operation in which a random stream of data bits is generatedwithin limited parameters. The stream (sequence) is typicallyused for encoding data for communication.Preamble A short portion of the beginning of a burst that allows thereceiver time to synchronize.Receiver Sensitivity The measure of the ability of a receiver to differentiate betweenthe selected signal and background noise for a specificperformance.RF Radio Frequency. Electromagnetic waves propagated withoutguide (wire or cable) in free space.Repeater A site where the data received by an AirLink slave isretransmitted to a second site by an AirLink master in order toachieve greater communication range.Send Timing A timing mode where the transmit timing is provided internallyby the modem.Slave Modem The slave modem is the modem which is under control of themaster modem. The slave modem always transmits a burst inreaction to a received burst from the master modem. The slavemodem is incapable of initiating any activity of its own.Synchronous DataTransmission The transmission of data in which both stations aresynchronized. Timing codes are sent from the transmitting stationto the receiving station to establish the synchronization. Thedata is then transmitted in continuous streams.System Gain The overall signal gain from input to output of a device or severaldevices connected as a system.Terminal Timing A timing mode where the transmit timing is provided to themodem via an externally wired path. Generally, this path is aloop through the DTE.Transmitter Output Power The amount of transmitted signal strength measured at theantenna post of the modem.VSWR ( Voltage StandingWave Ratio) The ratio of the maximum effective voltage to the minimumeffective voltage measured along the length of mis-matchedradio frequency transmission line. This value indicates the statusof the antenna.
AirLink Pro 64S Installer’s GuideIndexRev. B - 2/97 Index-11IndexIndex
AirLink Pro 64S Installer’s GuideIndexIndex- Rev. B - 2/972—A—AC Power Connector, B-9Acquiring Alarm Information, 4-7Acquiring Performance Information, 4-10Acquiring Status Information, 4-2Activity Lost on Bus A Only, 2-23Activity Lost on Bus B Only, 2-23Alarms, 3-28Holdoff, 3-27, 3-39Holdoff Time, 3-34Level, 3-27Reporting, 3-26Aligning the Antenna, 2-8antenna, 1-5, 2-2, 2-4, 2-6, 2-7, 2-8, 2-31alignment, 2-8Connector, B-10Application, 3-10command, 3-10parameter, 3-10with Clock Modes, 3-19ASCII terminal, 2-9ASCII Terminal Interface, 1-5, 3-2Asynchronous Mode, B-4audience, x—B—battery, 1-5Backup Burst Synchronization, 2-22Batch File Handling, 2-16Burst Synchronization, 2-4, 2-17Compatibility, 2-25Connector, B-10backup scheme, 2-20Fail-Safe Feature, 2-20Loss, 4-3Signal Description, 2-18—C—Channel Plan B-2, B-7checking operation, 2-28Clock Mode Emulation, 3-21Code of Federal Regulations, B-14Comm Mode, 3-17Command and Operand Description Syntax,3-4Command Keyword List, 3-4Command line Interface, 3-2Syntax, 3-3Compatibility, 1-6ConfiguringModem, 3-31RF Link, 3-24Connection, 3-42Connecting the Modem, 3-31configuration change, 2-30Connecting Power, 2-9Connection and Configuration, 3-30conventions used in this guide, xiCustomer Support, xiii—D—Data Interface Standards, B-8Data Rate, 3-17Data rate parameters, 3-36Date and Time, 3-8date command, 3-8DC voltmeter, 2-31DCD, 2-4DCE/TT, 3-21DCE/ST, 3-21Defaults, 3-29Default Parameters, 3-39Diagnostic Tools, 4-13DTE Status, 4-3DialFormat, 3-40Holdoff, 3-40Holdoff Time, 3-34Level, 3-40Retry, 3-40Dialout Function, 3-33
AirLink Pro 64S Installer’s GuideIndexRev. B - 2/97 Index-33DTE Connectors, B-10DTE Line Connection, 2-8DTE interface standard, 3-15DTE Mode, 3-15DTE ports, 3-16DTE Protection, 3-16DTE Specifications, B-4DTE/TT, 3-22DTR (Data Terminal Ready), 3-16—E—Editing Capability, 3-3EIA 530 25-Pin Male Connectors, B-13EIA-530 and V.35 Pin Assignments, B-12Error Correction, B-4Error Codes, 2-29Error Code Queue, 2-29Errored Seconds (ES), 4-12ESEvent Queue, 4-8Events Causing an Alarm State, 4-8Events, 3-33external power supply, 2-9—F—front panel, 2-3Indicators, 2-4full-duplex point-to-point link, 3-22Functions, 3-33—G—General Default Configuration:, 3-29General Specifications, B-2, B-5—F—Features and Capabilities, 1-3full-duplex, 1-3—H—help, 3-2, 3-6Hub Application, 3-12hub installation, 2-29HUB/ST, 3-22HUB_SYNC, 3-27—I—independent clocks, 3-23in a Hub, 3-24Identifying Physical Features, 2-3Initial Unit Configuration, 2-29installation, 2-8Installing Burst Sync Wiring, 2-20Interface Specifications, B-3—K—Keyboard Usage, xii—L—Lightning Protection, 2-6Local Loop Test, 4-14local loopback, 4-13Logging into the System, 3-5Logout, 3-6Login, 3-33Loopback Tests for Multipoint Networks, 4-18—M—Major Alarm, 2-4, 2-21majority voting algorithm, B-4Mechanical Specifications, B-3Maintenance of Standby Battery, 4-20master modem, 1-4Minor Alarm, 2-4Modem (Enabling) Mode, 3-41Modem Rate, 3-41Modem Setup Procedures, 3-31—N—near-end inter-channel interference, 2-20Network Management, 2-9, B-8ports, 1-5, 2-9, 2-11N-type jack connector, 2-8non-volatile memory, 1-5
AirLink Pro 64S Installer’s GuideIndexIndex- Rev. B - 2/974Notes, Cautions, and Warnings, xiii-O-operand time, 3-8Operation, 3-34Operations Local and Remote, 3-6Operating and Environmental Specifications,B-2—P—Password, 3-9command, 3-9performance information, 4-10statistics, 4-12Phone Numbers 1 and 2, 3-41Physical and Environmental Characteristics,2-5PN, 3-25Point-to-Multipoint Link, 3-11Point-to-Multipoint Application, 1-4Point-to-Point Link, 3-10polling, 1-4poll-select communication protocol, 1-4Port Duplication, 3-33Port Parameters, 3-36Power, 2-4Requirements, 2-6Specifications, B-3power-on self-test, 2-28Power-Up Messages, 3-5Protocol Modems, 3-37Pseudo-random noise, 3-25Power-up LED Sequence, 2-28Prerequisite Knowledge, xProgrammed Configuration Parameters, 1-5primary burst synchronization bus, 2-21primary hub, 2-21Procomm, 2-16Protocol, B-4-Q-QRSS Test, 4-11query alarms command, 4-9query performance command, 4-10query status command, 4- 2—R—Radio Interface, B-5radio interface specifications, B-6Receiver, B-7RS-232 25-Pin Male Connectors, B-13Radio Synchronization Loss, 4-3Range, 3-25RD, 2-4Reader Response, xivrear panel, 2-4rear-panel connectors, 2-5Receive Signal Quality (RSQ), 4-12Reference Master, 3-24Remote Loop Test, 4-16Remote Modem Connection, 2-15Repeat Alarm Count, 3-34Repeat Count, 3-39Repeat Dialing and Prioritization, 3-34Repeater, 3-13Variations, 3-15reset alarms command, 4-9reset UWER command, 4-12Resetting Performance Counters, 4-12Resetting the Event Queue, 4-9reset alarms, 4-9reset UWER, 4-12Responses, 3-37and Alerts, 3-38RF RF Plan, 3-26RF Power, 3-26RF setup parametersRSQ, 4-5, 4-12RSSI, 4-3
AirLink Pro 64S Installer’s GuideIndexRev. B - 2/97 Index-55RTS, 2-4—S—Serial Communication Port, 2-13set up instructions, 2-6Signal-to-Pin Assignments, B-8Site Preparation, 2-5spread-spectrum, 1-2modulation, 1-2stub mast, 2-7subrate data, B-4synchronizer, 1-4Synchronous Mode, B-4System Delay, B-14system grounding, 2-8system start-up, 2-28—T—TD, 2-4Telecommunication, B-14TerminalConnection, 2-9, B-9Preferences, 2-11user interface, 1-6setup parameters, 2-10Setup Requirements, 2-10Setup Requirements with Windows™,2-11Test in Progress, 4-5timing code, 1-3, 1-4Time Division Duplex, 1-3Burst Structure, 2-18transmission bursts, 1-3, 1-4Transmitter, B-6Typical Antenna Mounts, 2-7Typographic Conventions, xiiTypography, xi—U—UASperformance statistics, 4-12Unavailable Seconds, 4-12Unpacking, 2-2User-Directed Connections, 3-36User Interface Additions, 3-38-V-ViewingPerformance Information, 4-10Status Information, 4-2Event Queue, 4-9VSWR, 4-6—W—Windows Terminal Emulator, 2-17

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