I tried most of the combinations of below settings, but the result the same: when the RTP stops to be received from Cisco Gateway, also it is stopped towards iPhone.

Maybe I am missing the right combinations of parameters?

<action application="set" data="bridge_generate_comfort_noise=true"/>

<!--

<action application="set" data="rtp_disable_vad_in=true"/>

<action application="set" data="rtp_disable_vad_out=true"/>

-->

<action application="set" data="record_waste_resources=true"/>

<action application="set" data="rtp_enable_vad_in=false"/>

<action application="set" data="rtp_enable_vad_out=false"/>

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