37
KX-FP365CX / KX-FM388CX
6.6.
Modem Section
6.6.1.
Function
The unit uses a 1 chip modem (IC5) that serves as an interface between the control section for FAX transmission and reception
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 (IC5) has hardware which sends and detects all of the necessary signals for FAX communication.
It can be controlled by writing commands from the CPU (IC1: inside ASIC) to the register in the modem (IC5).
This modem (IC5) also sends DTMF signals, 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-FM388CX
Страница 12: ...12 KX FP365CX KX FM388CX 6 Technical Descriptions 6 1 Connection Diagram ...
Страница 14: ...14 KX FP365CX KX FM388CX 6 2 1 General Block Diagram ...
Страница 16: ...16 KX FP365CX KX FM388CX 6 3 2 Memory Map ...
Страница 25: ...25 KX FP365CX KX FM388CX 6 4 2 Block Diagram ...
Страница 27: ...27 KX FP365CX KX FM388CX ...
Страница 42: ...42 KX FP365CX KX FM388CX b Redundancy Compression Process Coding Mode This unit uses one dimensional MH format ...
Страница 78: ...78 KX FP365CX KX FM388CX Countermeasure ...
Страница 79: ...79 KX FP365CX KX FM388CX REFERENCE Test Mode P 63 ...
Страница 80: ...80 KX FP365CX KX FM388CX REFERENCE Test Mode P 63 ...
Страница 81: ...81 KX FP365CX KX FM388CX REFERENCE Test Mode P 63 ...
Страница 82: ...82 KX FP365CX KX FM388CX REFERENCE Test Mode P 63 ...
Страница 83: ...83 KX FP365CX KX FM388CX ...
Страница 84: ...84 KX FP365CX KX FM388CX ...
Страница 85: ...85 KX FP365CX KX FM388CX REFERENCE Test Mode P 63 ...
Страница 89: ...89 KX FP365CX KX FM388CX ...
Страница 114: ...114 KX FP365CX KX FM388CX ...
Страница 121: ...121 KX FP365CX KX FM388CX I O and Pin No Diagram ...
Страница 123: ...123 KX FP365CX KX FM388CX Other NG example while the power is ON and the LCD displays the following ...
Страница 124: ...124 KX FP365CX KX FM388CX 12 5 5 2 NG Example ...
Страница 128: ...128 KX FP365CX KX FM388CX Note Check to the SP Phone Rx Tx signal routes Refer to Check Sheet for Signal Route P 125 ...
Страница 130: ...130 KX FP365CX KX FM388CX 12 5 8 2 Troubleshooting Flow Chart ...
Страница 136: ...136 KX FP365CX KX FM388CX 12 5 12 Thermal Head Section Note Refer to Thermal Head P 26 ...
Страница 139: ...139 KX FP365CX KX FM388CX 13 Service Fixture Tools ...
Страница 141: ...141 KX FP365CX KX FM388CX 14 1 Upper Cabinet Section 14 1 1 How to Remove the Image Sensor CIS ...
Страница 142: ...142 KX FP365CX KX FM388CX 14 1 2 How to Remove the Thermal Head ...
Страница 143: ...143 KX FP365CX KX FM388CX 14 2 Back Cover Section 14 2 1 How to Remove the Back Cover and Platen Roller ...
Страница 144: ...144 KX FP365CX KX FM388CX 14 2 2 How to Remove the Pickup Roller ...
Страница 145: ...145 KX FP365CX KX FM388CX 14 2 3 How to Remove the Paper Exit Roller and Cassette Lever ...
Страница 146: ...146 KX FP365CX KX FM388CX 14 3 Lower Cabinet Section 14 3 1 How to Remove the Bottom Frame ...
Страница 147: ...147 KX FP365CX KX FM388CX 14 3 2 How to Remove the Digital Analog Interface and Sensor Boards ...
Страница 148: ...149 KX FP365CX KX FM388CX 14 3 4 How to Remove the Gear Block and Separation Roller ...
Страница 149: ...148 KX FP365CX KX FM388CX 14 3 3 How to Remove the Power Supply Board and AC cord ...
Страница 150: ...150 KX FP365CX KX FM388CX 14 3 5 How to Remove the Component parts of Gear Block ...
Страница 151: ...151 KX FP365CX KX FM388CX 14 4 Operation Cover Section 14 4 1 How to Remove the Operation Cover ...
Страница 152: ...152 KX FP365CX KX FM388CX 14 4 2 How to Remove the Operation Board LCD MIC Board and Document Exit Roller ...
Страница 153: ...153 KX FP365CX KX FM388CX 14 4 3 How to Remove the Separation Rubber ...
Страница 154: ...154 KX FP365CX KX FM388CX 14 5 Installation Position of the Lead Wires ...
Страница 155: ...155 KX FP365CX KX FM388CX ...
Страница 168: ...168 KX FP365CX KX FM388CX 16 1 4 Power Supply Board 16 1 5 Interface Board ...
Страница 170: ...170 KX FP365CX KX FM388CX 16 3 Test Chart 16 3 1 ITU T No 1 Test chart ...
Страница 171: ...171 KX FP365CX KX FM388CX 16 3 2 ITU T No 2 Test Chart ...
Страница 172: ...172 KX FP365CX KX FM388CX 16 3 3 Test Chart ...
Страница 173: ...173 KX FP365CX KX FM388CX Memo ...
Страница 194: ...194 KX FP365CX KX FM388CX 20 1 2 Operation Cover Section ...
Страница 195: ...195 KX FP365CX KX FM388CX 20 1 3 Back Cover Section ...
Страница 196: ...196 KX FP365CX KX FM388CX ...
Страница 197: ...197 KX FP365CX KX FM388CX 20 1 4 Upper Cabinet Section ...
Страница 198: ...198 KX FP365CX KX FM388CX 20 1 5 Lower Cabinet Section ...
Страница 199: ...199 KX FP365CX KX FM388CX 20 1 6 Gear Block Section 20 1 7 Screws ...
Страница 200: ...200 KX FP365CX KX FM388CX 20 1 8 Accessories and Packing Materials ...