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.
Introduction
When shopping for the perfect PBX system, you are most likely considering IP PBX over bulky and expensive antique methods. However, the pricing schemes are both confusing and concerning, as you are unsure what you are looking at when trying to price different services out. Luckily enough, the biggest business telephone systems vendors use plans to determine prices, and these plans can be easily compared to competitors.