A virtual PBX is a internet-based telephony solution that provides businesses a contemporary and flexible alternative to conventional physical phone exchanges. Through this platform, all telephone communications are centrally managed via the internet instead of conventional phone lines. http://www.technitronic.com/info.php?a%5B%5D=%3Ca+href%3Dhttps%3A%2F%2FWww.Masip.es%2Fproductos-servicios%2Fcentralita-virtual-telefonica%2F%3Ecentralita+virtual+gratuita%3C%copyright%3E