Phone Stuff

• How To Build Your Own Analog Phone Network
• How Telephones Work
• Wie funktioniert die Schaltungstechnik eines alten Telefons mit einer Wählscheibe für die Impulswahl?

Interfacine with a phone or phone line

• The E2210 Telephone Line Interface has the schematic in its datasheet
  • good reference to figure out how to connect stuff to a phone
• How do I connect my raspberry pi to a landline phone to process calls? - Good description of the important bits of phone line magic