Fax or FACSIMILE is a transmission device diagram line map from prototype to a destination. By linking fax connected phone you have. Send in the transcription. Can send documents to the destination receiver all telephone services to all over the country and abroad. The news will reach the destination correctly as close to the original fast. The convenient and economical strongly.History, as of FAX, has developed a lasting from sending facsimile (PHOTO TELEGRAPH) which has been sending pictures international for long distance line Fifty years. In the past, no communication satellite or cable underwater, as in The present international communication. We have to communicate with the system of shortwave radio (HIGH FREQUENCY) when sending facsimile transmitter facsimile.To each other with a radio telecommunication system. We sometimes called radio facsimile (RADIO PHOTO), which was not popular much use for spending too much time together with the problem of Radio system, which depends on the weather conditions at the time. The reception is not clear because of the interference of radio waves, and high cost. Have only to send pictures news newspapers.About 20 years ago has developed to send a facsimile to send but the picture document. To make suitable to send the business document using the transmission time, cost less and various applications are easier, called "DOCUMENT FACSIMILE".In the domestic industry needed to send pictures, drawing, and they must use the fax. And the development of fax gradually. Finally a organization name "CONSULATIVE COMMITTEE INTERNATIONAL TELEPHONE. AND TELEGRAPH "(C.C.I.T.T.) in standard of fax up a group (GROUP), such as the I.C. (INTERGRATED. CIRCUIT) SENIOR OPTICAL etc., as well as the development of Chemical Technology Which is very important to save a copy of fax and receiver points. Starting at the cost of using the fax was down by the system of thermal contact (THERMAL SENSITIVE PAPER) used บันทึ.
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