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18
KX-HT82480/82470/82460 Series
4.2.2.5.
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).
4.2.2.6.
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 fil-
ter to eliminate false detection.
The off-hook detection scheme provides two unique thresholds to allow hysteresis, and also includes a programmable debounce fil-
ter to eliminate false detection.
4.2.2.7.
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.
R714A
R713A
R710B
R709B
R708B
R707B
D702B
D700A
D701A
CL703B
+15V
FG
DG
DG
DG
DG
CL701B
R700A
R703A
C700A
DG
DG
DG
CL700B
CL704B
DG
CL702B
C705B
R704B
*C708B
*C736B
DG
C709B
C710B
*C706B
D703B
D704B
L700B
*C737B
DG
DG
DG
C734A
C735A
D705A
D706A
L701B
C704B
*C707B
*C738B
*C739B
25
25
26
26
27
27
28
28
29
29
30
30
31
31
32
32
33
33
23
23
24
24
34
34
21
21
22
22
Q700B
1
3
24
C703B
Q701B
R701A
R702A
C701A
C702A
R705B
R706B
A
0V
TIP
TIP
RING
-26V
-26V
R714A
R713A
R710B
R709B
R708B
R707B
D702B
D700A
D701A
CL703B
+15V
FG
DG
DG
DG
DG
CL701B
R700A
R703A
C700A
DG
DG
DG
CL700B
CL704B
DG
CL702B
C705B
R704B
*C708B
*C736B
DG
C709B
C710B
*C706B
D703B
D704B
L700B
*C737B
DG
DG
DG
C734A
C735A
D705A
D706A
L701B
C704B
*C707B
*C738B
*C739B
25
25
26
26
27
27
28
28
29
29
30
30
31
31
32
32
33
33
23
23
24
24
34
34
21
21
22
22
Q700B
1
3
24
C703B
Q701B
R701A
R702A
C701A
C702A
R705B
R706B
A
RING
On-hook
Off-hook
TIP
RING
R714A
R713A
R710B
R709B
R708B
R707B
D702B
D700A
D701A
CL703B
+15V
FG
DG
DG
DG
DG
CL701B
R700A
R703A
C700A
DG
DG
DG
CL700B
CL704B
DG
CL702B
C705B
R704B
*C708B
*C736B
DG
C709B
C710B
*C706B
D703B
D704B
L700B
*C737B
DG
DG
DG
C734A
C735A
D705A
D706A
L701B
C704B
*C707B
*C738B
*C739B
25
25
26
26
27
27
28
28
29
29
30
30
31
31
32
32
33
33
23
23
24
24
34
34
21
21
22
22
Q700B
1
3
24
C703B
Q701B
R701A
R702A
C701A
C702A
R705B
R706B
A
RING
On-hook
Off-hook
TIP
RING
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