![]() this isn't for the faint of heart, but possible, if the data is that important to you. There are two versions of APT Decoder available. īetween these resources and some C programming, you should be able to extract the faxes. APTDecoder is free software from Patrik Tast of Vstervik in Finland, which allows you to capture NOAA. There was a Linux port at some time, but I couldn't find any valid links. It only works on Irix, so you'll need to port it. The late Tony Fischer wrote a software fax demodulator for V.34. What you will need to do is demodulate the content to retrieve the binary fax session and to filter out and extract the image/g3fax or image/g4fax data. However, luckily, the fax image data transmission itself is uninterrupted, so it is possible to filter out the unnecessary data. Thus, you cannot simply play this audio back into a fax machine and expect it to work. Note that the fax transmission is not so-much a transmission, as a 2-way communication. Most faxes from the past decade are CCITT Group 3 or 4, containing image/g3fax or image/g4fax data which is encapsulated, or rather modulated, in one of V.27, V.29, V.17, V.34, or V.34bis. ![]()
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