I want to connect raspberry to fax machine , because I want cypher message before transmit via landline phone . how can do it , how can interface between rasp and fax machine ?

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    Baffled - a fax is a picture so how would you decode it at the other end? Scanning and then convert the resultant image to data or get them to type it in? A fax modem will let you control it directly but I think under Linux these are postscript devices.
    – user115418
    Commented Sep 14, 2020 at 23:53

1 Answer 1


You could use a ATA box that convert the fax (Analog telephony) to SIP (aka VoIP, Voice Over IP). From there on, is another topic.

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    can you more explanation? can you send me schema explain what you say? Commented Sep 16, 2020 at 7:27
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    An ATA box has one connector for the FAX and one connector for LAN. And that make the ATA box accessible from the network via TCP/IP. Commented Sep 16, 2020 at 7:44
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    Have you read the link to the "ATA box" in the answer? Commented Sep 16, 2020 at 7:45
  • can tell me ATA name(Type) for used in my project? Commented Sep 21, 2020 at 9:00
  • Search for "ata voip" on ebay, just make sure they are SIP compatible Commented Sep 21, 2020 at 12:15

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