RAD Data comm ASM-20 Specifiche Pagina 58
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6/4/99 13:18 General Description C-1
Appendix C
IR-X.21B Interface Module
C.1 General
This appendix:
•
Provides a general description of the IR-X.21B interface module
•
Describes the IR-X.21B connectors and pin assignments
•
Describes the IR-X.21B interface module
•
Describes the EXT mode for the IR-X.21B
•
Describes the INT/RCV mode for the IR-X.21B.
C.2 General Description
The IR-X.21B is an interface module for RAD modems, converting X.21
signals to TTL levels. The converted data is sent over the modem link, using
the modem modulation technique, and is converted back at the other end
into X.21 signals, or into any other digital interface signal.
Figure C-1 shows a typical application of the ASM-20 standalone modem
with the IR-X.21B interface module.
X.21
Network
ASM Remote Location
DTE
Line
X.21
RAD
RAD
Figure C-1 Typical ASM-20 X.21 Application
- Warranty 3
- Safety Warnings 4
- Telecommunication Safety 4
- Regulatory Information 5
- Declaration of Conformity 6
- Quick-Start Guide 7
- Foreword 8
- Conventions 9
- Contents 10
- List of Figures 12
- List of Tables 13
- Chapter 1 14
- Introduction 14
- Features 15
- 1.2 Physical Description 16
- 1.3 Functional Description 17
- Chapter 1. Introduction 19
- Digital Interface 20
- Diagnostics 20
- Timing Elements 20
- Indicators 21
- Electrical 21
- Physical 21
- Environment 21
- Table 1-1 Approximate Range 22
- Chapter 2 24
- Installation and Setup 24
- 2.3 Package Contents 25
- 2.4 Mechanical Installation 25
- 2.5 Electrical Installation 25
- Strap Selection 26
- Setting Internal 26
- Jumpers and 26
- Switches 26
- Only for standalone option 27
- ASM-20 28
- Power Connection 30
- Chapter 3 32
- Operation 32
- Figure 4-5 33
- Figure 4-3 33
- Figure 4-4 33
- 3.3 Operating Instructions 34
- Chapter 3. Operation 35
- Chapter 4 36
- Troubleshooting 36
- 4.3 Loop Tests Procedure 37
- 4.5 Modem Self Test 39
- Remote Digital 40
- Loopback 40
- Local Digital 41
- Chapter 5 42
- Card Cage Version 42
- 5.3 ASM-20/R Card Version 43
- 5.4 Power Supply 44
- Power Supply 45
- 5.5 Installation 46
- Chapter 5. Card Cage Version 47
- Appendix A 48
- Ethernet Interface 48
- Line Connector 49
- LAN Installation 51
- Switch Settings 51
- LED Indicators 51
- Appendix B 54
- IR-G.703 Codirectional 54
- Interface (64 kbps) 54
- B.3 EXT Mode 55
- B.4 INT/RCV Mode 56
- B-4 INT/RCV Mode 6/4/99 13:17 57
- Appendix C 58
- IR-X.21B Interface Module 58
- C.3 IR-X.21B Connectors 59
- C.5 EXT Mode 60
- C.6 INT/RCV Mode 61
- Appendix D 62
- DTE Interface Connectors 62
- Appendix E 66
- Connection to RS-422 66
- E-2 General 6/4/99 13:20 67
- Appendix F 68
- Unit Case Assembly 68
- Fastening 69
- Long Bracket 69
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