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11
KX-TDA6381X/KX-TDA6381SX
4.2.2.
Description of Functions and Circuits
4.2.2.1.
Dial Pulse Signal Transmission
Transmits 10pps/20pps dial pulse by a open/close action between Tip and Ring with Photo MOS relay.
The make width, break width and inter digital width for 10pps/20pps can be set respectively.
When making, 37pin (DIAL [0]) of IC6 becomes Low level, and RL3 turns ON. When breaking, 37pin (DIAL [0]) of IC6 becomes
High level, and RL3 turns OFF.
The make width, break width and inter digital width for 10pps/20pps can be set respectively.
When making, 37pin (DIAL [0]) of IC6 becomes Low level, and RL3 turns ON. When breaking, 37pin (DIAL [0]) of IC6 becomes
High level, and RL3 turns OFF.
It provides the SHUNT control function for the stabilization of line power depending on the destination. Turning ON PC5 when
transmitting pulse reduces the impedance at making, and stabilizes the line power.
transmitting pulse reduces the impedance at making, and stabilizes the line power.
4.2.2.2.
Circuit For Line Acquisition
Making CODEC (e.g. pin-37 of IC6, DIAL [0]) Low level, the photo MOS relay (RL3) turns ON and the line is acquired.
It is used in common as Dial Pulse transmitting circuit.
It is used in common as Dial Pulse transmitting circuit.
DC Loop Path:
• Ring
• Ring
L1D1D2J7D3RL3Q4(C-E)D4D3L1TH1Tip
• Tip
TH1L1D3D4Q4(C-E)RL3D3J7D2D1L1Ring
R[0]
T[0]
AG
+5V
DG
DG
DG
DG
DG
+5V
+5V
+5V
+5V
+5V
SFG
R
20A
PC5A
1
2
3
4
R
17A
D2A
R3
A
T1A
2
1
3
4
C1
A
C2
A
C4
A
C8A
D1A
D4
A
R21A
R
11A
R
14A
R15A
R16A
R1
8
A
R
19A
R1
A
R22A
R2
A
R4A
1.2K
R5
A
R6
A
J1A
RL
2
A
4
3
2
1
J4A
PC1A
1
23
4
PC2A
1
2
3
4
PC
4
A
1
2
3
4
L1A
1
2
3
4
C3
A
CN3 2
CN3 3
J7
A
C6
A
C7A
Q5A
E
C
B
ZN
R
2
A
CN2
1
26
D3A
1
2
3
4
TH1A
ZN
R
1
A
RL3A
4
3
2
1
D5
A
SA
1
A
12
3
Q4A
E
C
B
A
Ring
Tip
CODEC
IC6
R[0]
T[0]
AG
+5V
DG
DG
DG
DG
DG
+5V
+5V
+5V
+5V
+5V
SFG
R
20A
PC5A
1
2
3
4
R
17A
D2A
R3
A
T1A
2
1
3
4
C1
A
C2
A
C4
A
C8A
D1A
D4
A
R21A
R
11A
R
14A
R15A
R16A
R
18A
R
19A
R1
A
R22A
R2
A
R4A
R5
A
R6
A
J1A
RL
2
A
4
3
2
1
J4A
PC1A
1
23
4
PC2A
1
2
3
4
PC
4
A
1
2
3
4
L1A
1
2
3
4
C3
A
CN3 2
CN3 3
J7
A
C6
A
C7A
Q5A
E
C
B
ZN
R
2
A
CN2
1
26
D3A
1
2
3
4
TH1A
ZN
R
1
A
RL3A
4
3
2
1
D5
A
SA
1
A
12
3
Q4A
E
C
B
A
Ring
Tip
CODEC
IC6
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