IPvision has designed a proprietary back-end technology to secure the IP voice packet from unauthorized access named as “24 Bypass”. It is a virtual private network technologies that offer a method for delivering secure voice.
As VoIP transmits digitized voice as a stream of data, the VoIP VPN solution accomplishes voice encryption quite simply, applying standard data encryption mechanisms inherently available in the collection of protocols used to implement a VPN.
The VoIP gateway first converts the analog voice signal to digital form, encapsulates the digitized voice within IP packets, then encrypts the digitized voice using IPsec, and finally routes the encrypted voice packets securely through a VPN tunnel. At the remote site, another VoIP router decodes the voice and converts the digital voice to an
analog signal for delivery to the phone.