SIP Protocoll

Hello, 

I have developped a doorbell application on the base of ethersex. It is actually running on the Webserver hardware of Ulrich Radig. It is a work not fully completed, but a work in progress. At the moment the microcontroller is able to start a SIP-Call triggered with an external input. If the call is not accepted, it stops after a given time. 

The next step would be the other direction. While getting a call, a relais should be switched. 

Regards, 
Johann