Introduction Technical Specifications | RAD Data comm ASM-20

Chapter 1. Introduction	ASM-20Installation and Operation Manual

1-10 Technical Specifications

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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 Warnings Regulatory Information Supplementary Information Safety INT or EXT and the other modem RCV LBT Installing and Operating ASM-20Adjust the jumpers. See , Installation and Setup Quick-Start Guide Preface Conventions Contents Troubleshooting and Diagnostics List of Figures List of Tables Applications Chapter IntroductionOverview Following DTE interface options are available DTE interface Front Panel Physical Description Functional Description CDD conditional diphase modulation technique Async to Sync Converter Range See Table Level Technical SpecificationsUnloaded twisted pair 19 to 26 AWG Timing Elements Digital Interface Diagnostics Weight 290 gm / 10.1 oz PowerRed Bit errors Err Yellow Power Supply 115 or 230 V 10% 47 to 63 Hz 5W Baud 19 AWG 22 AWG 24 AWG 26 AWG Rate Approximate Range Introduction 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 Switches X.21, one of the modems should be set to RCV clock PCB Layout Diagram Jumper Function Possible Factory Switch Identity Settings ASM-20 Strap Selection Settings Start Bit Data Bits Parity Stop Bit No. of Bits Power Connection Installation and Setup Electrical Installation ASM-20 Controls and IndicatorsChapter Operation General Name Type Function Control and Indicator Functions Operating Instructions Power On Procedure Procedure Activation of Tests Operational Jumper Switch ChangesPower Off ASM-20 ASM-20-2 Chapter Troubleshooting DiagnosticsFrequently Asked Questions Differences in Versions Bit Error Rate Tester Bert Loop Tests Procedure Bert Using Loops Local Test Analog Loopback Modem Self Test Remote Digital Loopback Communication Link Tests Remote ASM-20 in Digital Loopback Local Digital Loopback ASM-MN-214 Card Cage Chapter Card Cage Version ASM-MN-214 Rear Panel ASM-20/R Card Version AC Supply 100, 115 or 230 VAC DC Supply -48 VDC Power Supply ASM-MN-214 Front Panel Power Supply with Redundancy Installation Card Cage Version Installation Description Appendix a Ethernet Interface Signal Pin DB-25 RJ-45 IR-ETH Connector Options General Ethernet Bridge SpecificationsInstallation and Operation Option Other devices do not Description Location Color Name Table A-3 IR-ETH Bridge LED Indicators Appendix A. Ethernet Interface Installation and Operation General Description Appendix B IR-G.703 Codirectional Interface 64 kbps Figure B-2 Location of JP1 on the IR-G.703 Interface Module EXT Mode Odem a Odem B INT/RCV ModeModem B Page Figure C-1 Typical ASM-20 X.21 Application Appendix C IR-X.21B Interface Module Pin 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 Module Figure C-4 EXT Mode Timing Block Pin Circuit Function Appendix D DTE Interface Connectors RTS 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 Unit Figure F-1 Installation of a Single Unit Installation of Two Units Appendix F. Unit Case Assembly Figure F-3 Installation of Two Units