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[Signals for status recognition according to input signals]
Signal Name
H:The handset is in the on-hook state.
RHS
L: The handset is in the off-hook state.
CI
Incoming call (CI) detection signal
[Other signals]
Signal Name
TEL IN
Receiving signal from line or modem
SPOUT
Speaker output signal
Transmission (DTMF) analog signal output
TXOUT
from modem
Reception (DTMF, others) analog signal input
RXIN
into modem
TELOUT
Voice input to MODEM from handset.
(Example: SENDING/RECEIVING)
LINE
H
L
CML
CI DETECTOR
PC1
Q101
RX
TEL MUTE
(H:MUTE)
TX
HANDSET
MIC MUTE
(H:MUTE)
Q102
: FAX SENDING/RECEIVING
Function
Function
TEL/LIU PWB
CONTROL PWB
IC102-B
TXOUT
RXIN
IC102-A
IC101-A
TEL IN
IC101-B
SPEAKER
IC5
IC7
SP MUTE
(H:MUTE)
+24VL
DG
NO
Signal Name (CNLIUA)
1
RHS-
2
3
+24VL
4
MICMUTE
5
TELIN
6
TELMUTE
7
RXIN
8
TXOUT
9
MODEM BLOCK
(20438 I/A)
SIGTX
SPKRP
SIGRX
MICP
SELECT
LINEIN
LINE IN ENABLE
Q105
Q104
SPOUT
LINE
OUT
BZOUT1
DTMFMUTE
RCVOL
SP MUTE
TEL MUTE
CI
CML
MIC MUTE
VOL-A
VOL-B
VOL-C
Fig. 6
5 – 12
UX-A450DE/IT/H
NX-A550DE/IT/FO-A650IT
NO
Signal Name (CNLIUA)
10
DG
11
12
13
14
15
16
17
RLYCONT(N.C.)
CML
RTLOOP
0,1
0,0
1,0
1,1
MIC ENABLE
SP OUT ENABLE
MIC
/LINE
LPF
0,20,25,30dB
LINE OUT ENABLE
LINESEL
1,1
0,0
1,0
MUTE,0,-6,-12dB
IC3 SCE214V
FAX CONTROLLER
PIN
FILM
CI-
HS- (N.C.)
TELOUT
DPON
DPMUTE
0,6dB
SIN
DAC
DAC
ADC
0,+4dB
SOUT
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