Troubleshooting and Repair
73
Tr
oub
le
sho
oting
Ground Start Trunk
The Ground Start Trunk serves most PBX-CO connections in an analog
environment.
Figure 14: Ground Start Trunk
Table 7: Ground Start Trunk Summary
Signal
Ground Start Trunk PBX
Outgoing
Ground Start Trunk
PBX Incoming
Seize
Ring lead goes active. PBX
grounds the ring lead
Tip lead goes active; 90
Vac is applied to Ring
lead in 2 sec on, 4 sec off
cadence
Seize
Acknowledgment
Tip lead goes active; Audible
Dial Tone generated; ground
returned on tip
Tip-Ring leads activated
(shorted); Loop Current
flows in line
Digits
Loop Current toggled (Rotary)
or DTMF
-
(Sheet 1 of 2)
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 ...
Страница 34: ......
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 ...
Страница 110: ...Technician s Handbook 100 ...
Страница 111: ...Chapter 4 Programming ...
Страница 112: ......
Страница 168: ...Technician s Handbook 158 ...
Страница 169: ...Chapter 5 Installation ...
Страница 170: ......
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 ...
Страница 240: ......
Страница 258: ...Technician s Handbook 248 ...
Страница 261: ...Notes ...
Страница 262: ...Technician s Handbook Notes ...