Network Professional Services has developed some new exciting solutions featuring the ability to carry Voice Over IP (VOIP) across customer VPN's. Unlike traditional tie lines, which can cost thousands of dollars per year, special voice converters on your PABX and normal telephone handset converts the voice signals into traffic that can be transmitted over your VPN. A VoIP VPN combines Voice Over IP and virtual private network technologies to offer a method for delivering secure voice. Because 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-router first converts the analog voice signal to digital form, encapsulates the digitized voice within IP packets, then encrypts the digitized voice using IPSEC or OpenVPN, 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. Free Software Implementation VoIP VPN solution may be accomplished with free open systems software. Hardware and consultancy services are available from NPS on request.
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