Here is my description how I was able to install freepbx from win7 on an APU board using a “null modem” cable, in my case it was using an USB to serial adapter. Maybe it helps someone as I was not able to find myself a working description.
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Download freepbx, in my case this was:
SNG7-PBX-64bit-1712-2, Release Date: December 2017 -
Use Rufus (portable version is sufficient) to burn the image on an usb stick, make sure that it is burned as an iso image and not as dd.
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on the usb stick use a text editor (e.g. notepad++) to edit \isolinux\isolinux.cfg. After line 1 (serial 0 115200) add a new line “console 0”; store the changed file
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boot the usb stick on the apu device, select the vnc installation type
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configure your settings using vnc
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once the installation is running show some patience. Installation proceeds quickly until about step 584, then it stalls for hours. I went to sleep after 6 hours, the next morning then the installatin was completed sucessfully
For some reason I needed 3 attempts to complete the installation, at least one time I was not patient enough. If you run into some weird error, just reboot the device and retry before giving up.