RAD Data comm ASM-20 specification

Appendix B. IR-G.703 Codirectional Interface (64 kbps)	ASM-20Installation and Operation Manual

B-4 INT/RCV Mode

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RAD Data comm ASM-20 operation manual

Contents

RAD data communications Headquarters US East US West ASM-20Page Warranty Ports Safety Status Safety Warnings Regulatory Information Supplementary Information Safety Adjust the jumpers. See , Installation and Setup Installing and Operating ASM-20Quick-Start Guide INT or EXT and the other modem RCV LBT Preface Conventions Contents Troubleshooting and Diagnostics List of Figures List of Tables Chapter Introduction OverviewApplications Following DTE interface options are available DTE interface Front Panel Physical Description Functional Description CDD conditional diphase modulation technique Async to Sync Converter Technical Specifications Unloaded twisted pair 19 to 26 AWGRange See Table Level Timing Elements Digital Interface Diagnostics Red Bit errors Err Yellow PowerPower Supply 115 or 230 V 10% 47 to 63 Hz 5W Weight 290 gm / 10.1 oz Baud 19 AWG 22 AWG 24 AWG 26 AWG Rate Approximate Range Introduction Technical Specifications Chapter Installation and Setup IntroductionSite Preparation and Prerequisites Package Contents Mechanical InstallationElectrical 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 Chapter Operation Controls and IndicatorsGeneral ASM-20 Name Type Function Control and Indicator Functions Operating Instructions Power On Procedure Activation of Tests Operational Jumper Switch Changes Power OffProcedure Frequently Asked Questions Chapter Troubleshooting DiagnosticsDifferences in Versions ASM-20 ASM-20-2 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 Ethernet Bridge Specifications Installation and OperationGeneral 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 INT/RCV Mode Modem BOdem a Odem B Page Figure C-1 Typical ASM-20 X.21 Application Appendix C IR-X.21B Interface Module Table C-1 IR-X.21B DB-15 RS-422 Connector Pin Assignment Interface module $87,21 25&21,18Pin Function 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 Signal Function RS-449 RS-422/423 EIA Pins Appendix E Connection to RS-422Pin Circuit Appendix E. Connection to RS-422 Installation of the Unit Case into a 19 Rack Appendix F Unit Case AssemblyInstallation of a Single Unit Unit Case Figure F-1 Installation of a Single Unit Installation of Two Units Appendix F. Unit Case Assembly Figure F-3 Installation of Two Units