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Version 5.64 - released Jul/26/2019. Release notes. - $100 US

- TLS, WSS, CLI, Public/private keys and certificate management

- live speech and automatic digit injection (perfect to test IVR)

Version 3.54 - released on Feb/27/2017. Release notes. - $40US

- UDP, TCP

Version 2.40 - released on July/02/2013.

Unsupported version and It is no longer possible to buy a license for it.