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Wiring Requirements for the Audio Telephone Circuit
PRELIMINARY: Model SK-FFT Manual — P/N 54711:B2 12/18/2020
Figure 5.6 Telephone Jack Only Audio Circuit Wired in Class B
Figure 5.7 Telephone Jack Only Audio Circuit Wired in Class A
Caution!
For System Supervision-
For Terminals 2 and 3,
do not use looped wire under the
terminals. Break wire run to provide
supervision of communications.
4.7K W, 1/2 watt ELR
(Install on the last device
for Class B telephone
circuit only).
Audio Phone Circuit Installation
27
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