Hardware Installation
Page 3-6
BUS Termination
Three resistors (100 ohm, 150 ohm and 200 ohm) are
supplied with the system bus terminal socket. They are
located in a plastic bag inside the socket.
These resistors are used to terminate the system bus in
accordance with the wiring rules detailed in the following
pages.
Note:
150 ohm resistor is provided but is no longer
required for bus termination.
Resistor
Colour Code
100 ohm
Brown
Black
Black
Black
Red
150 ohm
Brown
Green
Black
Black
Red
200 ohm
Red
Black
Black
Black
Red
Cable
All cabling lengths referred to this in manual are based on 0.5 mm
diameter cable.
The length of any cabling can be estimated by measuring the resistance
of the cable when shorted at one end (ensure any equipment has been
disconnected from the cable.
The standard cable resistance for 0.5 mm cable is 97.8 ohms / 1000 m
Cable pair
length (metres)
Resistance
(ohms)
Cable pair
length (metres)
Resistance
(ohms)
10
2.0
90
17.6
20
3.9
100
19.6
30
5.9
110
21.5
40
7.8
120
23.5
50
9.8
130
25.4
60
11.7
140
27.4
70
13.7
150
29.3
80
15.6
160
31.3
BU S
Содержание Commander i
Страница 11: ...Chapter One Introduction to the Commander i System ...
Страница 19: ...Chapter Two System Description ...
Страница 23: ...Chapter Three Hardware Installation ...
Страница 24: ......
Страница 57: ...Chapter Four Programming ...
Страница 83: ......
Страница 84: ...Chapter Five Commander Customer Training ...
Страница 89: ...Chapter Six Maintenance and Troubleshooting ...
Страница 93: ......
Страница 94: ...Appendix A Installation Summary ...
Страница 102: ...Appendix B Factory Default Values ...
Страница 106: ...Installation Summary Commander i Product Service Manual Issue 2 Page A 5 Appendix C Commander i Serial Item Numbers ...
Страница 109: ...Appendix D Commander i System User Guide ...
Страница 110: ...Telstra Commander i System User Guide Serial Item 749 025 Issue 2 ...
Страница 113: ...1 Getting To Know Your Commander i ...
Страница 117: ...2 Answering Calls ...
Страница 120: ...3 Making Calls ...
Страница 123: ...4 Call Handling ...
Страница 127: ...5 Other Facilities ...
Страница 131: ...6 Programming ...
Страница 142: ...Appendix F Commander i AFU User Guide ...
Страница 143: ...Telstra Commander i Analogue Facilities Unit User Guide Serial Item 749 35 Issue 2 ...
Страница 145: ...1 Introduction ...
Страница 148: ...2 How To Use The AFU ...
Страница 152: ...3 AFU Quick Reference Card ...
Страница 154: ...Installation Summary Commander i Product Service Manual Issue 2 Page A 9 Appendix G Technical Bulletins ...