Comfort Noise relaying in any Asterisk version?


So I’ve read around and it says everywhere that Asterisk doesn’t fully support CN RTP packets. I know that there is some limited support te generate them using the rtpkeepalive option, but that won’t help with my use case. I’ve checked the source code and there clearly is code present that will interpret and generate RTP packets with CN payload type, at least as far back as version 1.8. That code just doesn’t seem to get called.

I don’t even need Asterisk to generate CN; I just need it to relay them to bridged channels when it receives them.
My question: is there a way, via configuration or by compiling in a code change that I could easily make Asterisk relay RTP packets with CN payload?