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RAD Data comm ASM-20 operation manual Introduction Technical Specifications

Models: ASM-20

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Chapter 1. Introduction	ASM-20Installation and Operation Manual

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RAD Data comm ASM-20 operation manual Introduction Technical Specifications

Contents

RAD data communications Headquarters US East US West ASM-20Page Warranty Ports Safety Status Safety WarningsRegulatory Information Supplementary Information SafetyINT or EXT and the other modem RCV LBT Installing and Operating ASM-20Adjust the jumpers. See , Installation and Setup Quick-Start GuidePreface Conventions Contents Troubleshooting and Diagnostics List of Figures List of Tables Applications Chapter IntroductionOverview Following DTE interface options are available DTE interfaceFront Panel Physical DescriptionFunctional Description CDD conditional diphase modulation techniqueAsync to Sync Converter Range See Table Level Technical SpecificationsUnloaded twisted pair 19 to 26 AWG Timing Elements Digital Interface DiagnosticsWeight 290 gm / 10.1 oz PowerRed Bit errors Err Yellow Power Supply 115 or 230 V 10% 47 to 63 Hz 5WBaud 19 AWG 22 AWG 24 AWG 26 AWG Rate Approximate RangeIntroduction Technical Specifications Site Preparation and Prerequisites Chapter Installation and SetupIntroduction Electrical Installation Package ContentsMechanical Installation ASM-20 X.21 Rear Panel Strap Selection Setting Internal Jumpers SwitchesX.21, one of the modems should be set to RCV clock PCB Layout DiagramJumper Function Possible Factory Switch Identity Settings ASM-20 Strap Selection SettingsStart Bit Data Bits Parity Stop Bit No. of Bits Power Connection Installation and Setup Electrical Installation ASM-20 Controls and IndicatorsChapter Operation GeneralName Type Function Control and Indicator FunctionsOperating Instructions Power On ProcedureProcedure Activation of Tests Operational Jumper Switch ChangesPower Off ASM-20 ASM-20-2 Chapter Troubleshooting DiagnosticsFrequently Asked Questions Differences in VersionsBit Error Rate Tester Bert Loop Tests ProcedureBert Using Loops Local Test Analog Loopback Modem Self TestRemote Digital Loopback Communication Link TestsRemote ASM-20 in Digital Loopback Local Digital LoopbackASM-MN-214 Card Cage Chapter Card Cage VersionASM-MN-214 Rear Panel ASM-20/R Card VersionAC Supply 100, 115 or 230 VAC DC Supply -48 VDC Power SupplyASM-MN-214 Front Panel Power Supply with RedundancyInstallation Card Cage Version Installation Description Appendix a Ethernet InterfaceSignal Pin DB-25 RJ-45 IR-ETH Connector OptionsGeneral Ethernet Bridge SpecificationsInstallation and Operation Option Other devices do notDescription Location Color Name Table A-3 IR-ETH Bridge LED IndicatorsAppendix A. Ethernet Interface Installation and Operation General Description Appendix B IR-G.703 Codirectional Interface 64 kbpsFigure B-2 Location of JP1 on the IR-G.703 Interface Module EXT ModeOdem a Odem B INT/RCV ModeModem B Page Figure C-1 Typical ASM-20 X.21 Application Appendix C IR-X.21B Interface ModulePin Function Table C-1 IR-X.21B DB-15 RS-422 Connector Pin AssignmentInterface module $87,21 25&21,18 Position IR-X.21B Interface ModuleFigure C-4 EXT Mode Timing Block Pin Circuit Function Appendix D DTE Interface ConnectorsRTS Signal General 13/4/99 Pin Circuit Signal Function RS-449 RS-422/423 EIA PinsAppendix E Connection to RS-422 Appendix E. Connection to RS-422 Unit Case Appendix F Unit Case AssemblyInstallation of the Unit Case into a 19 Rack Installation of a Single UnitFigure F-1 Installation of a Single Unit Installation of Two UnitsAppendix F. Unit Case Assembly Figure F-3 Installation of Two Units