Youï¿½re seeing live calls as OnSIP customers pick up the phone. When an OnSIP customer makes a call, a pin drops. When an OnSIP customer receives a call, a pin drops.
This works because OnSIP is - at its core - a communications platform built on software. We created a live UDP stream of OnSIP customer call data with IP addresses of each end point (phone). We used IP2Location to get the lat/long for each IP address, and then plotted these points via the Google Map API.