RingCentral Virtual PBX - http://www.ringcentral.com/virtual-pbx/index.html?bmid=seo <br /> <br />This video explains the four things entrepreneurs can learn from the virtual pbx evolution. <br /> <br />The integration of the Internet to the traditional Private Branch Exchange (http://www.ringcentral.com/virtual-pbx/index.html) let to what is now known as the virtual Private Branch Exchange.
