: Une interface openhardware pour brancher des téléphones analogiques à un Asterisk via USB.

Génération de DTMF avec un arduino

Telephone-related ASCII Schematics V1.01
   Telephone in use light
   Detecting a telephone RING
   (manual) Phone In-Use Light
   Phone to audio interface (SSI202 input)
   Phone Off-Hook Indicator
   'phone rang' indicator light
   Phone Line to Audio
   Phone in-use
   Telephone Line Monitor (Plans)
   Use old phones as an intercom
   Phone-In-Use indicator
   Telephone Power?
   Hold function for Telephone
   Digital/Standard Phone Line Tester

telegraphie militaire

An old rotary phone can be used for a number of purposes in your Arduino projects - use it as a novel input device, or use the Arduino to interface a rotary phone to your computer.

L'histoire des téléphones en France