RAD Data comm ASM-20 operation manual Approximate Range, Baud 19 AWG 22 AWG 24 AWG 26 AWG Rate

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ASM-20Installation and Operation ManualChapter 1. Introduction

Table 1-1 Approximate Range

Baud

19 AWG

22 AWG

24 AWG

26 AWG

Rate

(0.8 mm)

(0.6 mm)

(0.5 mm)

(0.4 mm)

kbps

km

miles

km

miles

km

miles

km

miles

 

 

 

 

 

 

 

 

 

256

3.75

2.3

2.85

1.75

2.25

1.4

1.9

1.2

 

 

 

 

 

 

 

 

 

192

6.0

3.7

4.5

2.8

3.5

2.2

2.7

1.7

 

 

 

 

 

 

 

 

 

144

10.6

6.6

6.75

4.2

4.5

2.8

3.4

2.1

 

 

 

 

 

 

 

 

 

128

12.4

7.7

7.3

4.5

5.0

3.1

3.6

2.2

 

 

 

 

 

 

 

 

 

115.2*

12.8

7.8

7.65

4.75

5.25

3.3

3.8

2.5

 

 

 

 

 

 

 

 

 

112

12.8

8.0

8.0

5.0

5.5

3.4

4.0

2.5

 

 

 

 

 

 

 

 

 

96

13.0

8.1

8.3

5.15

6.0

3.7

4.15

2.6

 

 

 

 

 

 

 

 

 

72

15.0

9.3

9.4

5.8

6.25

3.9

4.3

2.65

 

 

 

 

 

 

 

 

 

64

17.6

11.0

11.0

6.8

7.5

4.6

5.3

3.3

 

 

 

 

 

 

 

 

 

57.6*

18.8

11.7

11.75

7.3

8.0

5.0

5.6

3.5

 

 

 

 

 

 

 

 

 

56

18.8

11.7

11.75

7.3

8.0

5.0

5.6

3.5

 

 

 

 

 

 

 

 

 

48

19.4

12.0

12.2

7.6

8.25

5.2

5.8

3.6

 

 

 

 

 

 

 

 

 

38.4*

20

12.5

12.5

7.8

8.5

5.3

6.0

3.7

 

 

 

 

 

 

 

 

 

32

20.5

12.75

12.85

8.0

8.75

5.4

6.2

3.85

 

 

 

 

 

 

 

 

 

28.8*

20.5

12.75

12.85

8.0

8.75

5.4

6.2

3.85

 

 

 

 

 

 

 

 

 

19.2**

23.0

14.0

14.0

8.7

9.75

6.0

7.0

4.3

 

 

 

 

 

 

 

 

 

*Async baud rate

**Sync / Async baud rate

Technical Specifications

1-9

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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 Overview Chapter IntroductionApplications DTE interface Following DTE interface options are availablePhysical Description Front PanelCDD conditional diphase modulation technique Functional DescriptionAsync to Sync Converter Unloaded twisted pair 19 to 26 AWG Technical SpecificationsRange See Table Level 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 Introduction Chapter Installation and SetupSite Preparation and Prerequisites Mechanical Installation Package ContentsElectrical 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 InstructionsPower Off Activation of Tests Operational Jumper Switch ChangesProcedure 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-45Installation and Operation Ethernet Bridge SpecificationsGeneral 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 ModuleModem B INT/RCV ModeOdem a Odem B Page Appendix C IR-X.21B Interface Module Figure C-1 Typical ASM-20 X.21 ApplicationInterface module $87,21 25&21,18 Table C-1 IR-X.21B DB-15 RS-422 Connector Pin AssignmentPin Function 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 Appendix E Connection to RS-422 Signal Function RS-449 RS-422/423 EIA PinsPin Circuit 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