Phone Line Sim Schematic (and some issues)

Here's the schematic of the various phone line related modules I've been working with on the breadboard including the KS0835F SLIC, MT8870 DTMF Decoder, ESP8266, PCF8574 GPIO expander, and misc analog and digital glue circuitry.

Project on github: https://github.com/GadgetReboot/misc_file_bin/tree/master/2022_11/Telephone_Central_Office_wip/DesignPrototype
DTMF Decoder project: https://github.com/GadgetReboot/DTMF_Decoder
KS0835F phone line module: https://github.com/GadgetReboot/KS0835F_Phone_SLIC

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