Original Link: http://www.twilio.com/blog/2013/03/build-a-twilio-hard-phone-with-sip-from-twilio-raspberry-pi-asterisk-freepbx-and-the-obihai-obi100.html?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+twilio%2FOBEN+%28Twilio+Company+Blog+-+Discover+Our+Web+Services+API+for+Making+and+Receiving+Phone+Calls%29

If you have worked with Twilio before, you have surely heard that sweet, sweet ring of your phone many times. But today, we are entering uncharted territory – you are going to learn how to make a phone ring without it even being connected to a traditional phone network! All you need are some simple pieces of hardware and that old landline phone that got shoved into the back of your closet years ago.

Interesting article on using the new SIP protocol from Twilio and a raspberry pi…