Loop Start Line/Trunk; Figure 13: Loop Start Line/Trunk; Table 6: Loop Start Line/Trunk Summary - Mitel SX-200 EL Technician's Handbook

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
Seize
Seize
Acknowledgment
Digits
Stop Dial
Loop Start Line PBX
Outgoing
Tip-Ring leads activated
(shorted); Loop Current flows
in line
Loop Current and/or dial tone
generated
Loop Current toggled (Rotary)
or DTMF
-
Troubleshooting and Repair
Loop Start Line PBX
Incoming
90Vac is applied to Ring
lead in 2 sec on, 4 sec
off cadence
-
-
-
(Sheet 1 of 2)
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