A virtual PBX is a internet-based telephony system that offers businesses a modern and flexible alternative to traditional physical phone systems. Through this technology, all telephone communications are handled centrally via the internet rather than conventional phone lines. http://www.serena-garitta.it/ver.php?a%5B%5D=%3Ca+href%3Dhttps%3A%2F%2FRoams.es%2Fcompanias-telefonicas%2Fmovistar%2Fempresas%2Fcentralita-virtual%2F%3Ecentralita+virtual+gratuita%3C%copyright%3E