RAD Data comm ASM-20 operation manual Following DTE interface options are available

Page 15

Chapter 1. Introduction

ASM-20Installation and Operation Manual

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R A D

A S M -2 0

EXT CLK

R A D

G .7 03

D IG ITA L

S E R V IC E N E T W O R K

R A D

ASM -20

RCV CLK

DTE

R A D

ASM -20

EXT CLK

ASM -20

RCV CLK

Term inal

Figure 1-2 G.703 Modem Link Application

R A D

ASM -20

R A D

 

 

 

G .703 or

ASM -20

X .21/RS -530/V.24

 

 

 

or V.35 or ETH

DTE

 

Figure 1-3 Tail-end for Digital Network Application

Features

ASM-20 features V.54 diagnostic capabilities for performing local analog

 

loopback and local and remote digital loopback. The operator at either end

 

of the line may test both modems and the line when in digital loopback

 

mode. The loopback is controlled by either front panel push buttons or via

 

the DTE interface.

Options

The following DTE interface options are available:

V.24/RS-232(up to 64 kbps)

V.35

X.21

RS-530

V.36

G.703 (64 kbps co-directional)

Built-in Ethernet bridge.

1-2 Overview

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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 Chapter Introduction OverviewApplications Following DTE interface options are available DTE interfaceFront Panel Physical DescriptionFunctional Description CDD conditional diphase modulation techniqueAsync to Sync Converter Technical Specifications Unloaded twisted pair 19 to 26 AWGRange 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 Chapter Installation and Setup IntroductionSite Preparation and Prerequisites Package Contents Mechanical InstallationElectrical 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 ProcedureActivation of Tests Operational Jumper Switch Changes Power OffProcedure 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 OptionsEthernet Bridge Specifications Installation and OperationGeneral 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 ModeINT/RCV Mode Modem BOdem a Odem B Page Figure C-1 Typical ASM-20 X.21 Application Appendix C IR-X.21B Interface ModuleTable 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 ModuleFigure C-4 EXT Mode Timing Block Pin Circuit Function Appendix D DTE Interface ConnectorsRTS 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 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