Raspberry Pi 5 Fax HAT Design

I need to create a hat for raspberry pi 5 that have two functions. 1 has an analog FXS port t provide direct connection to a fax machine. The second is i converts ths fax call inbound or outbound to the raspberry pi 5 for processing audio and decoding. this will be for inbound and outbound.

Thought for 55 sec

flux

Your goal is a Raspberry Pi 5 HAT with an analog FXS fax port plus bidirectional fax audio handoff to the Pi for software processing.

I’ve prepared the plan: telephony interface, isolation/power/protection, Pi audio/control path, and schematic/layout validation.
Because this template isn’t editable from your account, use this copy to build it: Clone project. Then click Start on the plan bar.

Pick telephony architecture

Define Pi interface

Add line protection

Files

Schematic

Layout

3D View

RPi1

+5V

+3V3

Raspberry Pi 5 Hat with PCIe Template