How do I connect an Arduino to a landline telephone wall outlet?
I'm thinking of home automation, something like:
- I call my house, and after a few rings the Arduino picks up the phone
- The Arduino somehow (modem? synthetic voice?) tells me the house temperature and whether I've left my garage door up and all the lights turned on.
- I somehow (modem? whistling Morse code?) tell the Arduino to lower the garage door, turn off all the lights, and adjust the temperature setpoint down a few degrees.
Is it true that connecting stuff to a landline (i.e., technology developed in the 1870s) is less complicated than connecting stuff to some sort of cell-phone network or cable TV Internet access?
(This is a different question than " I'm looking for a low-parts-count Arduino <-> phone & POTS line interface " , right?)