Technician’s Handbook
84
Table 10: A-B Signalling States (Tie/E&M)
PBX Port
Type
CSU
Type
PBX port
condition to
channel
Transmit Receive CSU condition to
analog facility
A
B
A
B
Tie Trunk
(loop start)
DPO Tx loop open
0
0
x
x
x
loop closure
1
1
x
x
x
DPO Rx x
x
x
0
x
normal battery
x
x
x
1
x
reverse battery
DID or Tie
Trunk
(loop start)
DPT Tx
normal battery
0
0
x
x
x
reverse battery 1
1
x
x
x
DPT Rx x
x
x
0
x
loop open
x
x
x
1
x
loop closure
TIE Trunk
4wire/2
wire E&M
E&M Tx M-lead
grounded or
open
0
0
x
x
x
M-lead battery
1
1
x
x
x
E&M Rx x
x
x
0
x
E-lead open
x
x
x
1
x
E-lead grounded
or open
Содержание SX-200 EL
Страница 1: ...TECHNICIAN S HANDBOOK LIGHTWARE 19 RELEASE 3 0 ...
Страница 11: ...Chapter 1 Introduction ...
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Страница 32: ...Technician s Handbook 22 ...
Страница 33: ...Chapter 2 Routine Maintenance ...
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Страница 55: ...Chapter 3 Troubleshooting and Repair ...
Страница 56: ...Technician s Handbook 46 ...
Страница 88: ...Technician s Handbook 78 Figure 16 E M Trunk Type I 2 wire ...
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Страница 111: ...Chapter 4 Programming ...
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Страница 169: ...Chapter 5 Installation ...
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Страница 175: ...Installation 165 Installation SX 200 ML FD Cabinet Card Assignment Figure 24 SX 200 ML FD Cabinet Card Assignment ...
Страница 176: ...Technician s Handbook 166 SX 200 LIGHT Cabinet Card Assignment Figure 25 SX 200 LIGHT Cabinet Card Assignment ...
Страница 239: ...Chapter 6 Maintenance Commands ...
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Страница 261: ...Notes ...
Страница 262: ...Technician s Handbook Notes ...