ESP32 Ma Bell Gateway
Contents:
Introduction
Telephone Service Standards
The Bell System Blueprint
Solution Design
ESP32 Microcontroller
Circuit Design
Power Supply Design
Voice and Tone Audio
Ringer Signaling
Off-Hook Detection
DTMF Signaling (Detection and Generation)
Pulse Dialing Detection
Firmware Design
Enclosure Design
Implementation
User Guide
ESP32 Ma Bell Gateway
Solution Design
Circuit Design
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Circuit Design
This section details the circuit design for the Ma Bell Gateway.
Contents:
Power Supply Design
Voice and Tone Audio
Ringer Signaling
Off-Hook Detection
DTMF Signaling (Detection and Generation)
Pulse Dialing Detection