Firmware Dependency Reference

This topic outlines the key enhancements introduced to Call Flow Designer (CFD) feature and the corresponding minimum PBX firmware version required to use them.

Release Date Description Required PBX Firmware
October 13, 2025
  • Component: For Prompt, Menu, User Input, Record, Dial by Number, and Transfer components, when Text-to-Speech (TTS) is configured as the prompt, these components support converting dynamic text into speech.

    You can enter static text along with placeholders that reference variables to dynamically compose the text. The system will convert it into speech and play to callers.

  • Variable: Added TTS-related variables.
    • $Prompt{index}.ttsResult
    • $Menu{index}.ttsResult
    • $UserInput{index}.ttsResult
    • $Record{index}.ttsResult
    • $DialByNumber{index}.ttsResult
    • $Transfer{index}.ttsResult
84.20.0.128 or later
August 5, 2025
  • Transfer component: Added support for Custom destination.
  • Expression: Added JSON-related functions.
    • JSON_GET_STRING
    • JSON_GET_INTEGER
    • JSON_GET_OBJECT
84.20.0.21 or later
July 7, 2025 Initial release. 84.19.0.110 or later