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9
KX-NS5180X/KX-NS5180SX
5.2.5.
Bell Signal Detection
During on-hook period, transmitting the bell signal to the AC loop in the CR series circuits detects the current by Photo Coupler, and
it determines the presence of a bell signal.
CPU board software performs the operation for recognition and determination of a pattern of bell signals.
it determines the presence of a bell signal.
CPU board software performs the operation for recognition and determination of a pattern of bell signals.
Bell loop path:
1. Ring
L100 R103 PC100 C104 R108 L100 Tip
2. Tip
L100 R108 C104 PC101 R103 L100 Ring
5.2.6.
End-Call Signal Detection
End call is detected by the photo coupler at part of making DC loop. PC100 (PC101) 4-pin is High level during a call.
On the other hand, at end-call, PC100(PC101) 4-pin changes from High to Low level.
PC100(PC101) 4-pin (BELLDET/REVDET) is connected to DSP (IC101), and CPU will monitor this signal via DSP (IC101) and
detects end call.
On the other hand, at end-call, PC100(PC101) 4-pin changes from High to Low level.
PC100(PC101) 4-pin (BELLDET/REVDET) is connected to DSP (IC101), and CPU will monitor this signal via DSP (IC101) and
detects end call.
BELL DET
REVDET
BELLDET (To DSP(IC101))
REVDET (To DSP(IC101))
+
-
-
-
+
-
+
-
REVDET[0]
VIN[0]
VOUT[0]
SHNT[0]
SHNT[0]
DP[0]
PC103A
1
2
3
4
R126A
SA100A
1
2
3
AL2
R103A
C110A
R112A
R115A
RL100A
NC
1
2
2
3
4
R102A
DG
DG
C104A
PC101A
1
2
3
4
C111A
R118A
DG
C109A
ZNR100A
+3.3V
+3.3V
R101A
+3.3V
RL101A
1
3
4
DG
DG
C112A
R106A
D104A
1
3
4
2
R117A
R125A
C113A
D109A
1
3
2
DG
SFG
R116A
D101A
+3.3V
PC100A
1
2
4
3
FG
VH1
VH1
C103A
R109A
D103A
VH1
R110A
+15V
+3.3V
TH100A
C105A
D110A
SFG
C102A
R121A
T100A
3
1
4
5
6
5
6
+3.3V
R108A
R171A
+3.3V
L100A
1
4
2
3
C138A
C139A
J100A
R122A
R124A
IC100A
4
VEE
8
VCC
Q100A
R113A
IC100A
3
2
1
IC100A
5
6
7
C107A C145A
C106A
R119A
R120A
R123A
R127A
R132A
R133A
C108A
C121A
C120A
A
BELLDET (To DSP(IC101))
REVDET (To DSP(IC101))
+
-
-
-
+
-
+
-
REVDET[0]
VIN[0]
VOUT[0]
SHNT[0]
SHNT[0]
DP[0]
PC103A
1
2
3
4
R126A
SA100A
1
2
3
AL2
R103A
C110A
R112A
R115A
RL100A
NC
1
2
2
3
4
R102A
DG
DG
C104A
PC101A
1
2
3
4
C111A
R118A
DG
C109A
ZNR100A
+3.3V
+3.3V
R101A
+3.3V
RL101A
1
3
4
DG
DG
C112A
R106A
D104A
1
3
4
2
R117A
R125A
C113A
D109A
1
3
2
DG
SFG
R116A
D101A
+3.3V
PC100A
1
2
4
3
FG
VH1
VH1
C103A
R109A
D103A
VH1
R110A
+15V
+3.3V
TH100A
C105A
D110A
SFG
C102A
R121A
T100A
3
1
4
5
6
5
6
+3.3V
R108A
R171A
+3.3V
L100A
1
4
2
3
C138A
C139A
J100A
R122A
R124A
IC100A
4
VEE
8
VCC
Q100A
R113A
IC100A
3
2
1
IC100A
5
6
7
C107A C145A
C106A
R119A
R120A
R123A
R127A
R132A
R133A
C108A
C121A
C120A
A
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