PBX In A Flash 5 (PIAF5) is a Debian 8 based operating system that turns your Vultr VPS into full fledged PBX. It possesses the following features, and more. * 8 simultaneous calls ( free license version from [3cx.com](https://www.3cx.com/) ). * Call forwarding (busy/no answer). * Call routing using direct inward dialing. * Call transfers. * Centralized phone book. * Desktop and mobile clients. * Direct calls to multiple devices at once. * Multiple codec support (G711, G722, GSM, ILBC......