DTMF obfuscation

The system permits a manual obfuscation of a call using a DTMF key sequence at the user's handset. When a user enters a specified sequence of digits, the obfuscation begins, and any audio will be immediately and irreversibly overwritten with the tone specified in the

Referencemacro
Label /audio/obfuscation/tones/

section of the

Keywordmacro
Label settings.xml

file. To stop obfuscation, the 

Referencemacro
Label stop

sequence must be entered, whereupon the audio will be written normally to the call's stream.

 

 The

Referencemacro
Label start

and 

Referencemacro
Label stop

 key sequences can be defined in the 

Keywordmacro
Label settings.xml

file located in 

Referencemacro
Label {app}\ProgramData\Tri-Line\Echo

, using the

Keywordmacro
Label dtmfStart

and

Keywordmacro
Label dtmfStop

attributes. The following SETTINGS.XML following 

Keywordmacro
Label settings.xml

snippet is an example of a configuration to enable manual call obfuscation when a user enters

Keywordmacro
Label **

...

The 

Keywordmacro
Label dtmfTimeout

attribute was provided to prevent a situation where extra digits have been erroneously entered, and therefore making it impossible to enter the correct sequence. After the specified DTMF timeout has passed, all the digits previously entered will be cleared. This also ensures that obfuscation does not occur during normal negotiation of DTMF telephone selection menus (inbound or outbound). To set a DTMF entry timeout, specify the value (in milliseconds) using the

Keywordmacro
Label dtmfTimeout

element.

...