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ASM-20

Installation and Operation Manual Appendix F. Unit Case Assembly

11/4/99 12:26 Installation of the Unit Case into a 19" Rack F-3

Short

Bracket

Left-Hand

Unit

Right-Hand

Unit

Rail

Short

Bracket

Rail

Figure F-2 Rack Adapter Components for Installation of Two Units

To install two units:

1. Fasten one long side rail to each unit (right side to one unit, left side to

the other unit) using the four screws and flatwashers supplied. The side

rails must be attached in opposing fashion, the narrow flange of the first

rail opposite the wide flange of the second rail.

2. Attach one short bracket opposite the side rail on each unit using the

four screws and flatwashers supplied.

3. Slide the side rail of one unit into the side rail of the other unit,

fastening the two units together (See Figure F-3).

1 2 ... 65 66 67 68 69 70 71

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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