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About

Places the calling channel in delayed audio loopback mode.It simply returns all audio sent, including voice, DTMF, etc after the specified delay [ms].
It is generally useful for checking if RTP audio path works both ways. Normal echo app can fail when tested on speaker phone.

Example

From the Dialplan

<action application="delay_echo" data="1000"/>

This example repeats back any audio it receives after a 1 second (1000 millisecond) delay.

See Also