How to disable Comfort Noise?

[Ravhi Rizaldi]

Hello,

My asterisk got a log like this below :

"NOTICE [22152] [C-0000000c]: res_rtp_asterisk.c:5769 process_cn_rfc3389: Comfort noise support incomplete in Asterisk (RFC 3389). Please turn off on client if possible."

I'm trying to search on google but that feature is not in Asterisk itself. but on the client side, on other softphone there is an option to disable that feature. So how I disabled it on JSSIP? Could I modify the header from JSSIP?