The majority of us have seen this on tv.
An example internet program that utilizes APIdaze audio/videoconference connection accessible from the web utilizing WebRTC and also the PSTN (utilizing a straightforward HTTP/RELAXATION with cURL). WebRTC Phone Monitor Application. Observe incoming calls inserted from the internet software into a http://www.novellara.net/2017/05/top-things-you-can-certainly-do-in-fifteen-minutes/ DID without needing Glass or XMPP. Below, the Station API can be used as the signaling route, and also the incoming contact that was presented could be solved straight from the browser using WebRTC.