Troubleshooting and Repair
71
Tr
oub
le
sho
oting
Loop Start Line/Trunk
The Loop Start Line/Trunk serves the standard domestic applications
and small businesses that have key systems and PBX applications.
Figure 13: Loop Start Line/Trunk
Table 6: Loop Start Line/Trunk Summary
Signal
Loop Start Line PBX
Outgoing
Loop Start Line PBX
Incoming
Seize
Tip-Ring leads activated
(shorted); Loop Current flows
in line
90Vac is applied to Ring
lead in 2 sec on, 4 sec
off cadence
Seize
Acknowledgment
Loop Current and/or dial tone
generated
-
Digits
Loop Current toggled (Rotary)
or DTMF
-
Stop Dial
-
-
(Sheet 1 of 2)
Содержание SX-200 EL
Страница 1: ...TECHNICIAN S HANDBOOK LIGHTWARE 19 RELEASE 3 0 ...
Страница 11: ...Chapter 1 Introduction ...
Страница 12: ......
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 ...