RAD Data comm ASM-20 operation manual

Contents ASM-20 RAD data communications Headquarters US East US WestPage Warranty Safety Warnings Ports Safety StatusRegulatory Information Safety Supplementary InformationQuick-Start Guide Installing and Operating ASM-20Adjust the jumpers. See , Installation and Setup INT or EXT and the other modem RCV LBTPreface Conventions Contents Troubleshooting and Diagnostics List of Figures List of Tables Applications Chapter IntroductionOverview DTE interface Following DTE interface options are availablePhysical Description Front PanelCDD conditional diphase modulation technique Functional DescriptionAsync to Sync Converter Range See Table Level Technical SpecificationsUnloaded twisted pair 19 to 26 AWG Digital Interface Diagnostics Timing ElementsPower Supply 115 or 230 V 10% 47 to 63 Hz 5W PowerRed Bit errors Err Yellow Weight 290 gm / 10.1 ozApproximate Range Baud 19 AWG 22 AWG 24 AWG 26 AWG RateIntroduction Technical Specifications Site Preparation and Prerequisites Chapter Installation and SetupIntroduction Electrical Installation Package ContentsMechanical Installation Strap Selection Setting Internal Jumpers Switches ASM-20 X.21 Rear PanelPCB Layout Diagram X.21, one of the modems should be set to RCV clockASM-20 Strap Selection Settings Jumper Function Possible Factory Switch Identity SettingsStart Bit Data Bits Parity Stop Bit No. of Bits Power Connection Installation and Setup Electrical Installation General Controls and IndicatorsChapter Operation ASM-20Control and Indicator Functions Name Type FunctionPower On Procedure Operating InstructionsProcedure Activation of Tests Operational Jumper Switch ChangesPower Off Differences in Versions Chapter Troubleshooting DiagnosticsFrequently Asked Questions ASM-20 ASM-20-2Loop Tests Procedure Bit Error Rate Tester BertBert Using Loops Modem Self Test Local Test Analog LoopbackCommunication Link Tests Remote Digital LoopbackLocal Digital Loopback Remote ASM-20 in Digital LoopbackChapter Card Cage Version ASM-MN-214 Card CageASM-20/R Card Version ASM-MN-214 Rear PanelPower Supply AC Supply 100, 115 or 230 VAC DC Supply -48 VDCPower Supply with Redundancy ASM-MN-214 Front PanelInstallation Card Cage Version Installation Appendix a Ethernet Interface DescriptionIR-ETH Connector Options Signal Pin DB-25 RJ-45General Ethernet Bridge SpecificationsInstallation and Operation Other devices do not OptionTable A-3 IR-ETH Bridge LED Indicators Description Location Color NameAppendix A. Ethernet Interface Installation and Operation Appendix B IR-G.703 Codirectional Interface 64 kbps General DescriptionEXT Mode Figure B-2 Location of JP1 on the IR-G.703 Interface ModuleOdem a Odem B INT/RCV ModeModem B Page Appendix C IR-X.21B Interface Module Figure C-1 Typical ASM-20 X.21 ApplicationPin Function Table C-1 IR-X.21B DB-15 RS-422 Connector Pin AssignmentInterface module $87,21 25&21,18 IR-X.21B Interface Module PositionFigure C-4 EXT Mode Timing Block Appendix D DTE Interface Connectors Pin Circuit FunctionRTS 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 Installation of a Single Unit Appendix F Unit Case AssemblyInstallation of the Unit Case into a 19 Rack Unit CaseInstallation of Two Units Figure F-1 Installation of a Single UnitAppendix F. Unit Case Assembly Figure F-3 Installation of Two Units