A general question to see if anyone has tried to interface Caller-ID to Node-RED ???
My ISP/Telephone provider here in the UK has just rolled-out free caller-ID, so I thought I'd investigate if the information can be captured and processed with Node-RED.
I think you have to need some additional hw to get the info from your land line.
I'm using myself a Fritzbox7490 as internet router, this router has also the possibility to connect land line and phones to it.
With the node-red-contrib-fritz it's then possible to get the caller id in node red and even much more interesting info can get retrieved from the fritzbox.
If you decide to make/buy the hardware, first check with you provider what kind of caller id they have, dtmf,fsk etc.