22 IFP-FFT Manual — P/N 54708:B3 10/28/2021
Audio Phone Circuit Installation Wiring Requirements for the Audio Telephone Circuit
5.2.2 Single Phone Jack Audio Circuit in Class A Configuration
For wiring specifications, refer to Section 5.2. Figure 5.3 below illustrates the single phone jack audio circuit and the SLC wired in Class A
configuration.
ADDRESS
LOOP
ONES
TENS
1 3
2 2
3 1
TB2
TB1
1 3
2 2
3 1
TB2
TB1
1 3
2 2
3 1
TB2
TB1
SLC O UT
+
–
+
–
+
+
PHONE
–
SLC
IN PHONE
IN
–
OUT
ADDRESS
LOOP
ONES
TENS
ADDRESS
LOOP
ONES
TENS
Contact EOL Connected
(See Figure 5.2 for EOL reference.)
Do not loop wire under the terminals.
Break wire run to provide proper
supervision of communications.
+ audio in
- audio in
+ audio out
- audio out
+ SLC out
- SLC out
IFP-MINIMON
IFP-MINIMON
IFP-MINIMON
IFP-FFT
FFT-FPJ
FFT-FPJ
FFT-FPJ
+SLC in
-SLC in
Figure 5.3 Single Phone Jack Audio Circuit Wired in Class A Configuration
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