
[Signals for status recognition according to input signals]
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| H: The handset is in the | |
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| L: The handset is in the | |||||
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| CI | Incoming call (CI) detection signal | |||
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| H: The handset or external telephone is in the | |
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| HS | ||||
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| L: The handset or external telephone is in the | ||||
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[Other signals] |
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Signal Name | Function | |||||
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TEL IN | Receiving signal from line or modem | |||||
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TEL OUT | Transfer signal to line | |||||
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SPOUT | Speaker output signal | |||||
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TXOUT | Transmission (DTMF) analog signal output | |||||
from modem | ||||||
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| RXIN | Reception (DTMF, others) analog signal input | ||||
| into modem | |||||
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NO | Signal Name (CNLIU) | NO | Signal Name (CNLIU) |
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1 | TELOUT | 7 | RXIN |
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2 | TELIN | 8 | TXOUT |
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3 | TELMUTE | 9 | CML |
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4 | CI | 10 | +24VA |
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5 | HS | 11 | +5V |
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6 | RHS | 12 | DG |
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(Example: TEL speaking)
TEL/LIU PWB |
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| CONTROL PWB |
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HS
CML
TXCONT
TEL LINE |
| H | TXOUT |
| SIGTX |
HS DETECTOR | L |
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| 1 |
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| MODEM | |
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EXT |
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| 0 | 4053 | (R96V24) |
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| 1 |
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| CI DETECTOR | 0 |
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| RXIN | 0 | SIGRX |
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| 1 |
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| 1 | 0 |
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HANDSET |
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| 1 |
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| 0 |
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| TELIN |
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| TELOUT |
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| VOL A |
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| VOL B |
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| VOL C |
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| BZCONT |
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HOOK SW |
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| SP AMP |
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| 0 |
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| 1 |
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| TXCONT |
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| 4051 |
| RXCONT |
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| SPEAKER |
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| MONITOR |
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| BZCONT |
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| FC200 |
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| RCVOL |
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| SP MUTE |
| TEL MUTE |
| TEL MUTE | |||
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| CI |
| CI | |||
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| RHS |
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CML
HS
TX/RX SIGNAL
+5V
OGM/ICM/MEMO/PLAYBACK SIGNAL | +24 |
OGM/MEMO/RECORD SIGNAL | DG |
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Fig. 6
5 – 10