Panasonic KX-TDA0174 Service Manual page 31

CODEC EXTENTION
PORT
EXT0
CODECIC201
EXT1
EXT2
EXT3
PIN No. SIGNAL
NAME
SO1_1
SO1_0 BELL0
SB1_2
SB1_1 DIAG_RLY0
SB1_0
SI1_1 HOOK0
SI1_0 DT_EST0
SO2_1
SO2_0 BELL1
SB2_2
SB2_1
SB2_0
SI2_1 HOOK1
SI2_0 DT_EST1
SO3_1
SO3_0 BELL2
SB3_2
SB3_1
SB3_0
SI3_1 HOOK2
SI3_0 DT_EST2
SO4_1
SO4_0 BELL3
SB4_2
SB4_1
SB4_0
SI4_1 HOOK3
SI4_0 DT_EST3
31
I/O ACT DESCRIPTIONS
O
O H Ringer output
O
O H Self diagnosis
switching
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
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
+5Vu pull up
L (Fixed)
+5V pull up
+5V pull up
L (Fixed)
+5V pull up
+5V pull up