We developed a software-hardware complex for making encrypted Internet calls to and from PSTN (Public Switched Telephony Network). We used the following PC based hardware: PhoneJack and LineJack produced by QuickNet (USA) www.quicknet.net This system is especially attractive for small/medium businesses as it requires minimal investments in hardware, most of which is standard inexpensive PC hardware. Nevertheless, the deployment of the standard ITU H323 protocol stack enables scalability needed to satisfy the demands of larger businesses.

http://www.quicknet.net

We used the following software:

С++ for Windows and Linux
OpenH323 (www.openh323.org)
OpenSSL (www.openssl.org)

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