Panasonic KX-TDA0174 Service Manual page 33

CODEC EXTENTION
PORT
EXT8
CODECIC250
EXT9
EXT10
EXT11
PIN No. SIGNAL
NAME
SO1_1
SO1_0 BELL8
SB1_2
SB1_1
SB1_0
SI1_1 HOOK8
SI1_0 DT_EST8
SO2_1
SO2_0 BELL9
SB2_2
SB2_1
SB2_0
SI2_1 HOOK9
SI2_0 DT_EST9
SO3_1
SO3_0 BELL10
SB3_2
SB3_1
SB3_0
SI3_1 HOOK10
SI3_0 DT_EST10
SO4_1
SO4_0 BELL11
SB4_2
SB4_1
SB4_0
SI4_1 HOOK11
SI4_0 DT_EST11
33
I/O ACT DESCRIPTIONS
O
O H Ringer output
O
O H
O
I L Off-hook detection
I H DTMF detection
O
O H Ringer output
O
I H
O
I L Off-hook detection
I H DTMF detection
O
O H Ringer output
O
O H
O
I L Off-hook detection
I H DTMF detection
O
O H Ringer output
O
O H
O
I L Off-hook detection
I H DTMF detection
NOTES
L (Fixed)
+5V pull up
+5V pull up
L (Fixed)
+5V pull up
+5V pull up
L (Fixed)
+5V pull up
+5V pull up
L (Fixed)
+5V pull up
+5V pull up