24
Dial Pulse Generator
The circuit consists of the CML relay, PLS relay and their peripheral circuits. This circuit generates dial
pulses. The CPU on the SC PC Board controls all dial pulse generation sequences. It turns relay CML
and PLS ON and OFF through the DZZSP58025 (IC80). The status of the relays during dialing is shown
below. When the absence of the terminating message is confirmed by the Off-Hook detector, the CPU
turns CML relay ON to develop loop status (DC loop). After a few seconds, the CPU turns the PLS relay
On and Off to generate dial pulses, making and breaking the loop.
DTMF Tone Generator
The circuit is incorporated in the MODEM on the SC PC Board. The DTMF tone is conveyed to the tele-
phone line using the same route as the facsimile signal. The DTMF tone selection is controlled by the
CPU. The relay status during dialing is shown below.
CML Relay
PLS Relay
Line release
Line status
make
break
Speech
condition
First
digit
Second
digit
Prepause
Inter-digit
pause
make
break
make
break
Speech
condition
Speech
condition
Dial Pulse
PLS Relay
CML Relay
Line release
Line status
make
break
Speech
condition
First
digit
Second
digit
Prepause
Inter-digit
pause
make
break
make
break
Speech
condition
Speech
condition
DTMF signal
DTMF Tone
Содержание DP-3000
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Страница 148: ...148 2 27 EP PC Board Drawing Name EP PC Board 1 8 Model DP 2000 2500 3000...
Страница 149: ...149 Drawing Name EP PC Board 2 8 Model DP 2000 2500 3000...
Страница 150: ...150 Drawing Name EP PC Board 3 8 Model DP 2000 2500 3000...
Страница 151: ...151 Drawing Name EP PC Board 4 8 Model DP 2000 2500 3000...
Страница 152: ...152 Drawing Name EP PC Board 5 8 Model DP 2000 2500 3000...
Страница 153: ...153 Drawing Name EP PC Board 6 8 Model DP 2000 2500 3000...
Страница 154: ...154 Drawing Name EP PC Board 7 8 Model DP 2000 2500 3000...
Страница 155: ...155 Drawing Name EP PC Board 8 8 Model DP 2000 2500 3000...
Страница 156: ...156 2 28 G3B PC Board Drawing Name G3B PC Board 1 10 Model DP 2000 2500 3000...
Страница 157: ...157 Drawing Name G3B PC Board 2 10 Model DP 2000 2500 3000...
Страница 158: ...158 Drawing Name G3B PC Board 3 10 Model DP 2000 2500 3000...
Страница 159: ...159 Drawing Name G3B PC Board 4 10 Model DP 2000 2500 3000...
Страница 160: ...160 Drawing Name G3B PC Board 5 10 Model DP 2000 2500 3000...
Страница 161: ...161 Drawing Name G3B PC Board 6 10 Model DP 2000 2500 3000...
Страница 163: ...163 Drawing Name G3B PC Board 8 10 Model DP 2000 2500 3000...
Страница 164: ...164 Drawing Name G3B PC Board 9 10 Model DP 2000 2500 3000 LCU LCE PCB LCU LCE PCB...
Страница 165: ...165 Drawing Name G3B PC Board 10 10 Model DP 2000 2500 3000 To SC PCB...
Страница 166: ...166 2 29 FRM PC Board Drawing Name FRM PC Board 1 1 Model DP 2000 2500 3000...
Страница 177: ...177 2 31 LANC PC Board Drawing Name LANC PC Board 1 1 Model DP 2000 2500 3000...
Страница 178: ...178 2 32 LCU PC Board Drawing Name LCU PC Board 1 1 Model DP 2000 2500 3000 SC PCB SRU PCB TEL LINE...
Страница 179: ...179 2 33 LCE PC Board Drawing Name LCE PC Board 1 1 Model DP 2000 2500 3000 To FXB PCB SRU PCB TEL...
Страница 180: ...180 2 34 SRU PC Board SRU PC Board 1 1 DZEP000027 Drawing Name Model DP 2000 2500 3000 HANDSET LCU LCE PCB...
Страница 183: ...183 2 36 HCE PC Board Drawing Name HCE PC Board 1 1 Model DP 2000 2500 3000 To LVPS To OPTION LVPS To HTC PCB...
Страница 185: ...185 2 38 MAIN LVPS PC Board 100V MAIN LVPS PC Board 100V Drawing Name Model DP 2000 2500 3000...
Страница 186: ...186 2 39 MAIN LVPS PC Board 200V MAIN LVPS PC Board 200V Drawing Name Model DP 2000 2500 3000...
Страница 187: ...187 2 40 OPTION LVPS PC Board 100V OPTION LVPS PC Board 100V Drawing Name Model DP 2000 2500 3000...
Страница 188: ...188 2 41 OPTION LVPS PC Board 200V OPTION LVPS PC Board 200V Drawing Name Model DP 2000 2500 3000...
Страница 190: ...190 2 43 Finisher Controller Circuit Diagram Finisher Controller PC Board 1 11 Drawing Name Model DP 2000 2500 3000...
Страница 191: ...191 Drawing Name Finisher Controller PC Board 2 11 Model DP 2000 2500 3000...
Страница 192: ...192 Drawing Name Finisher Controller PC Board 3 11 Model DP 2000 2500 3000...
Страница 193: ...193 Drawing Name Finisher Controller PC Board 4 11 Model DP 2000 2500 3000...
Страница 194: ...194 Drawing Name Finisher Controller PC Board 5 11 Model DP 2000 2500 3000...
Страница 195: ...195 Drawing Name Finisher Controller PC Board 6 11 Model DP 2000 2500 3000...
Страница 196: ...196 Drawing Name Finisher Controller PC Board 7 11 Model DP 2000 2500 3000...
Страница 197: ...197 Drawing Name Finisher Controller PC Board 8 11 Model DP 2000 2500 3000...
Страница 198: ...198 Drawing Name Finisher Controller PC Board 9 11 Model DP 2000 2500 3000...
Страница 199: ...199 Drawing Name Finisher Controller PC Board 10 11 Model DP 2000 2500 3000...
Страница 200: ...200 Drawing Name Finisher Controller PC Board 11 11 Model DP 2000 2500 3000...
Страница 342: ...DZZSM00171 0...