I'm currently building an application to show alarm information on a screen for our local fire department. Because of legal reasons, I am not allowed to use software to receive the fax (although there will be a Fritzbox which seems to be magically excluded from this limitation :) ) using a software solution. After being received the fax gets processed using OCR and parsed. A cloud solution is not an option. I know that my Fritzbox can receive a fax and send it as an email, but as far as I know, it cannot send it as an email while still forwarding it to the original fax device.
Seems like I need a fax device which can both print the received fax and save it to some digital storage like a network drive or email (to a local mail server) at the same time. Saving to a USB drive is not enough for obvious reasons. I'm open for other solutions. If there is a different device (like a router) that allows this, let me know.