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KX-FP207FX-S/FP218FX-S
6.6.
Modem Section
6.6.1.
Function
The unit uses a 1 chip modem (IC505) that serves as an interface between the control section for FAX transmission and recep-
tion and the telephone line. During a transmitting operation, the digital image signals are modulated and sent to the telephone
line.
During a receiving operation, the analogue image signals which are received via the telephone line are demodulated and con-
verted into digital image signals. The communication format and procedures for FAX communication are standardized by ITU-T.
This 1 chip modem (IC505) has hardware which sends and detects all of the necessary signals for FAX communication.
It can be controlled by writing commands from the CPU (IC501: inside ASIC) to the register in the modem (IC505).
This modem (IC505) also sends DTMF signals, generates a call tone (from the speaker), and detects a busy tone and dial
tones.
Overview of Facsimile Communication Procedures (ITU-T Recommendation):
1. ON CCITT (International Telegraph and Telephone Consultative Committee)
The No. XIV Group of ITU-T, one of the four permanent organizations of the International Telecommunications Union (ITU),
investigates and make recommendations on international standards for facsimiles.
2. Definition of Each Group
• Group I (G1)
Official A-4 size documents without using formats which reduce the band width of a signal are sent over telephone lines.Deter-
mined in 1968.
Transmission for about 6 minutes at a scanning line density of 3.85 lines/mm.
• Group II (G2)
Using reduction technology in the modulation/demodulation format, an A-4 size document is sent at an official scanning line den-
sity of 3.85 lines/mm for about 3 minutes.
Methods to suppress redundancy are not used.
Determined in 1976.
• Group III (G3)
Method of suppressing redundancy in the image signal prior to modulation is used. An A-4 size document is sent within about
one minute.
Determined in 1980.
• Group IV (G4)
Transmission is via the data network. A method is provided for suppressing redundancy in signals prior to transmission, and
error-free reception of transmission is possible.
The scope of these facsimile applications is not limited simply to transmission of written statements. Through symbiotic linkages
with other communication methods, it can be expected to expand to include integrated services.
Содержание KX-FP207
Страница 10: ...10 KX FP207FX S FP218FX S 6 Technical Descriptions 6 1 Connection Diagram ...
Страница 12: ...12 KX FP207FX S FP218FX S 6 2 1 General Block Diagram ...
Страница 14: ...14 KX FP207FX S FP218FX S 6 3 2 Memory Map ...
Страница 23: ...23 KX FP207FX S FP218FX S 6 4 2 Block Diagram ...
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Страница 44: ...44 KX FP207FX S FP218FX S 2 Signal path Refer to Check Sheet for Signal Route P 123 ...
Страница 67: ...67 KX FP207FX S FP218FX S 11 2 The Example of the Printed List 11 2 1 User Mode 11 2 1 1 KX FP207FX S ...
Страница 68: ...68 KX FP207FX S FP218FX S 11 2 1 2 KX FP218FX S Note The above values are the default values ...
Страница 76: ...76 KX FP207FX S FP218FX S Countermeasure ...
Страница 77: ...77 KX FP207FX S FP218FX S REFERENCE Test Mode P 58 ...
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Страница 119: ...119 KX FP207FX S FP218FX S I O and Pin No Diagram ...
Страница 121: ...121 KX FP207FX S FP218FX S Other NG example while the power is ON and the LCD displays the following ...
Страница 122: ...122 KX FP207FX S FP218FX S 12 5 5 2 NG Example ...
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Страница 127: ...127 KX FP207FX S FP218FX S Note Check to the SP Phone Rx Tx signal routes Refer to Check Sheet for Signal Route P 123 ...
Страница 129: ...129 KX FP207FX S FP218FX S 12 5 8 2 Troubleshooting Flow Chart ...
Страница 135: ...135 KX FP207FX S FP218FX S 12 5 12 Thermal Head Section Note Refer to Thermal Head P 24 ...
Страница 136: ...136 KX FP207FX S FP218FX S 13 Service Fixture Tools ...
Страница 140: ...140 KX FP207FX S FP218FX S 14 3 Disassembly Procedure 14 3 1 How to Remove the Image Sensor CIS ...
Страница 141: ...141 KX FP207FX S FP218FX S 14 3 2 How to Remove the Thermal Head ...
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Страница 143: ...143 KX FP207FX S FP218FX S 14 3 3 How to Remove the Bottom Frame ...
Страница 144: ...144 KX FP207FX S FP218FX S 14 3 4 How to Remove the P C Boards and Speaker ...
Страница 145: ...145 KX FP207FX S FP218FX S 14 3 5 How to Remove the Power Supply Board and AC cord ...
Страница 146: ...146 KX FP207FX S FP218FX S 14 3 6 How to Remove the Gear Block and Separation Roller ...
Страница 147: ...147 KX FP207FX S FP218FX S 14 3 7 How to Remove the Gears Motors and Arms of the Gear Block ...
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Страница 149: ...149 KX FP207FX S FP218FX S 14 3 8 How to Remove the Handset Cradle and Hook Switch Board ...
Страница 150: ...150 KX FP207FX S FP218FX S 14 3 9 How to Remove the Back Cover ...
Страница 151: ...151 KX FP207FX S FP218FX S 14 3 10 How to Remove the Platen Roller and Lock Lever ...
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Страница 153: ...153 KX FP207FX S FP218FX S 14 3 11 How to Remove the Pickup Roller ...
Страница 154: ...154 KX FP207FX S FP218FX S 14 3 12 How to Remove the Operation Panel ...
Страница 155: ...155 KX FP207FX S FP218FX S 14 3 13 How to Remove the Operation Board and LCD 14 3 13 1 KX FP207FX ...
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Страница 157: ...157 KX FP207FX S FP218FX S 14 3 14 How to Remove the Separation Holder and Exit Roller ...
Страница 158: ...158 KX FP207FX S FP218FX S 14 3 15 Installation Position of the Lead Wires 14 3 15 1 Lower Section ...
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Страница 161: ...161 KX FP207FX S FP218FX S 14 3 15 2 Operation Panel Section KX FP207 ...
Страница 162: ...162 KX FP207FX S FP218FX S 14 3 15 3 Operation Panel and Mic Board Section KX FP218 ...
Страница 177: ...177 KX FP207FX S FP218FX S 16 1 4 Power Supply Board 16 1 5 Interface Board ...
Страница 180: ...180 KX FP207FX S FP218FX S 16 3 Test Chart 16 3 1 ITU T No 1 Test chart ...
Страница 181: ...181 KX FP207FX S FP218FX S 16 3 2 ITU T No 2 Test Chart ...
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Страница 201: ...201 KX FP207FX S FP218FX S MEMO ...
Страница 212: ...212 KX FP207FX S FP218FX S 20 1 2 Operation Panel Section ...
Страница 213: ...213 KX FP207FX S FP218FX S 20 1 3 Upper Cabinet Section ...
Страница 214: ...214 KX FP207FX S FP218FX S 20 1 4 Back Cover Section ...
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Страница 216: ...216 KX FP207FX S FP218FX S 20 1 5 Lower Cabinet Section ...
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Страница 219: ...219 KX FP207FX S FP218FX S 20 1 7 Screws ...
Страница 220: ...220 KX FP207FX S FP218FX S 20 1 8 Accessories and Packing Materials ...
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