RAD Data comm ASM-20 operation manual Appendix E. Connection to RS-422

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Appendix E. Connection to RS-422	ASM-20Installation and Operation Manual

Table E-1 Interface List for Connecting ASM-20 (EIA 530) to RS-422 (V.36) DTE (Cont.)

Signal Function	RS-449 (RS-422/423)			EIA 530

		37 Pins	DB-25 Female Standalone
				and Frame
	Pin	Circuit	Pin	Circuit

Receive Clock	8	RT (A)	17	DD (A)
	26	RT (B)	9	DD (B)

Local Analog Loopback	10	LL	18	LL

Remote Loopback	14	RL	21	RL

Test Indicator	18	TM	25	TM

E-2 General

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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 Overview Chapter IntroductionApplications Following DTE interface options are available DTE interfaceFront Panel Physical DescriptionFunctional Description CDD conditional diphase modulation techniqueAsync to Sync Converter Unloaded twisted pair 19 to 26 AWG Technical SpecificationsRange See Table Level 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 Introduction Chapter Installation and SetupSite Preparation and Prerequisites Mechanical Installation Package ContentsElectrical 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 ProcedurePower Off Activation of Tests Operational Jumper Switch ChangesProcedure 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 OptionsInstallation and Operation Ethernet Bridge SpecificationsGeneral 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 ModeModem B INT/RCV ModeOdem a Odem B Page Figure C-1 Typical ASM-20 X.21 Application Appendix C IR-X.21B Interface ModuleInterface module $87,21 25&21,18 Table C-1 IR-X.21B DB-15 RS-422 Connector Pin AssignmentPin Function 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 Appendix E Connection to RS-422 Signal Function RS-449 RS-422/423 EIA PinsPin Circuit 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