It is a call which is made over internet protocol (VoIP). For example,
one can call using Google Voice to other recipient located miles away. Such
call can also be international.
Network router transformed, from the device used only for connection between different networks, into a device capable of performing many additional functions. More and more customers of Cisco deploy routers with integrated network services – complex network routers, which transmit voice, video and data, ensure the Internet connection and provide Wi-Fi and other add-ons.