Home phone system

Just an idea i was kicking around...is it possible to make a home phone system with an arduino and the old style corded phones...not really to get calls in for a POTS line...but to be an intercom where you can dial an extension and ring a particular phone...the reason why i was thinking about this is because i HATE with a passion yelling thur walls...and i figure it would be cool to just use phones to communicate

It might not need an arduino.

Perhaps some microphones, speakers, amplifiers and some switches...

darcy:
It might not need an arduino.

Perhaps some microphones, speakers, amplifiers and some switches...

Depends on how many rooms are to be connected. More than about 4 rooms and the switching and wiring gets mighty complicated.
Sub DECT phones in each room with one master in, say, the living room might be a better answer.