Fax, or thonphap (English: fax, fax, facsimile) is a telecommunications technology used for the data transfer, one a copy of the document through a device on the network, telephone, facsimile machine or telecopier, called on industries to certain remote copy sent to one person. The advantages are faster than the mail, but the disadvantage is that the documents may contain low quality and format that may not be directly placed or distorted. Current fax popularity go down because of the popular e-mail document delivery feature instead, which would not be such a disadvantage.
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