Panasonic KX-TDA0174, Service Manual, Page: 33 / 76

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