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9
KX-NS5173X/KX-NS5173SX/KX-NS5174X/KX-NS5174SX
5.2.5.
Power Supply to Tip/Ring
Voltage and current generated by the SLIC is supplied to the phones.
Preset voltage is -26V (On-hook).
Current is set as 26mA (Off-hook).
Preset voltage is -26V (On-hook).
Current is set as 26mA (Off-hook).
5.2.6.
Hook Detection
The SLIC/CODEC provides a programmable off-hook detection mechanism.
The off-hook detection scheme provides two unique thresholds to allow hysteresis, and also includes a programmable
debounce filter to eliminate false detection.
debounce filter to eliminate false detection.
5.2.7.
Ring Trip Feature
During ringing, the ring current is permanently sensed by the SLIC.
When the handset of a ringing telephone is picked up, the current is compared against the programmed ring trip threshold.
If it is above the programmed ring trip threshold, the ringing signal automatically stop and move to the off-hook status.
When the handset of a ringing telephone is picked up, the current is compared against the programmed ring trip threshold.
If it is above the programmed ring trip threshold, the ringing signal automatically stop and move to the off-hook status.
LDHW[0
LUH
DG
C207A
0.01u
250
R210A 15
R212A
R208A 1kF
DG
Q200A
TP2
R211A
1.65MF
D200A
C200A
0.01u 250
IC200A
GPIO2A/SRINGC
GPIO1A/STIPC
6
7
STIPACA
8
STIPDCA
9
CAPPA
10
CAPMA
11
SVBATA
18
DTX
19
DRX
20
SDCHA
21
SDCLA
22
DCDRVA
23
DCFFA
24
DCFFB
25
DCDRVB
26
SDCLB
12
SVDC
13
*RST
14
INTB/DTXENB
16
SDITHRU
17
PCLK
27
15
FSYNC
EPAD2
C204A
0.22u
250
+3.3V
C210B 0.1u
R201A 51
DG
FG
DG
C213A
0.1u
10
L200A 100u
D203A
1
L201A 100u
R206A 1kF
DG
C210A 0.1u
DG
C203A
15u
63
R209A 681kF
R203A 0.62F
R213A 0
R205A 0
C205A
0.1u
250
R200A 51
TP1
C206A
0.22u
250
D202A
1
2
2
C208A
0.01u
250
+40V
R202A 68k
R216A
523kF
C201A
0.022u
R204A
0.62F
C202A
0.022u
+40V
R207A 681kF
C212A
0.1u
A
0V
TIP
RING
-26V
LDHW[0
LUH
DG
C207A
0.01u
250
R210A 15
R212A
R208A 1kF
DG
Q200A
TP2
R211A
1.65MF
D200A
C200A
0.01u 250
IC200A
GPIO2A/SRINGC
GPIO1A/STIPC
6
7
STIPACA
8
STIPDCA
9
CAPPA
10
CAPMA
11
SVBATA
18
DTX
19
DRX
20
SDCHA
21
SDCLA
22
DCDRVA
23
DCFFA
24
DCFFB
25
DCDRVB
26
SDCLB
12
SVDC
13
*RST
14
INTB/DTXENB
16
SDITHRU
17
PCLK
27
15
FSYNC
EPAD2
C204A
0.22u
250
+3.3V
C210B 0.1u
R201A 51
DG
FG
DG
C213A
0.1u
10
L200A 100u
D203A
1
L201A 100u
R206A 1kF
DG
C210A 0.1u
DG
C203A
15u
63
R209A 681kF
R203A 0.62F
R213A 0
R205A 0
C205A
0.1u
250
R200A 51
TP1
C206A
0.22u
250
D202A
1
2
2
C208A
0.01u
250
+40V
R202A 68k
R216A
523kF
C201A
0.022u
R204A
0.62F
C202A
0.022u
+40V
R207A 681kF
C212A
0.1u
A
On-hook Off-hook
TIP
RING
RING
LDHW[0
LUH
DG
C207A
0.01u
250
R210A 15
R212A
R208A 1kF
DG
Q200A
TP2
R211A
1.65MF
D200A
C200A
0.01u 250
IC200A
GPIO2A/SRINGC
GPIO1A/STIPC
6
7
STIPACA
8
STIPDCA
9
CAPPA
10
CAPMA
11
SVBATA
18
DTX
19
DRX
20
SDCHA
21
SDCLA
22
DCDRVA
23
DCFFA
24
DCFFB
25
DCDRVB
26
SDCLB
12
SVDC
13
*RST
14
INTB/DTXENB
16
SDITHRU
17
PCLK
27
S C
15
FSYNC
EPAD2
C204A
0.22u
250
+3.3V
C210B 0.1u
R201A 51
DG
FG
DG
C213A
0.1u
10
L200A 100u
D203A
1
L201A 100u
R206A 1kF
DG
C210A 0.1u
DG
C203A
15u
63
R209A 681kF
R203A 0.62F
R213A 0
R205A 0
C205A
0.1u
250
R200A 51
TP1
C206A
0.22u
250
D202A
1
2
2
C208A
0.01u
250
+40V
R202A 68k
R216A
523kF
C201A
0.022u
R204A
0.62F
C202A
0.022u
+40V
R207A 681kF
C212A
0.1u
A
On-hook Off-hook
TIP
RING
RING
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