I would like to use my Cisco 8861 phone to open my door. The phone is connected to a third party sip provider but I can add more IP lines to it. I do have a door with a automatic release. My idea is to use my Cisco IP phone in order to open the door (via a relais, f.e. behind a raspberry pi).
Idea was to setup an asterisk server (on the raspberry pi). Then I would like to add this server to my phone and somehow configure a certain button on the phone, which will interact with asterisk. This button could just send something to the server (e.g. a certain number etc), and then I would like asterisk to call a script, which triggers then my relais.
Question is: How to start with asterisk, any idea? Any additional info oder hint in which direction I should look?