The system permits Echo allows manual obfuscation of calls using a DTMF key sequence at entered by the user 's into their handset. When When the system detects a user enters pressing a specified specific sequence of digits, the obfuscation begins, and any audio will be immediately and irreversibly overwritten with the tone specified in the /audio/obfuscation/tones/ section of the settings.xml file. To stop obfuscation, the stop key sequence must be entered, whereupon the audio will be written normally to the call's stream.
The The start and stop key sequences can be defined in the settings.xml file located in {app}\ProgramData\Tri-Line\Echo, using the dtmfStart and dtmfStop elements. The following settings.xml snippet is an example of a configuration to enable manual call obfuscation when a user enters **
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