Fax Detection through RFC2833

does Asterisk supports fax detection through faxdetect option if CNG signal is coming in RFC 2833 RTP Event? I have WorkCentre 3220 trying to send FAX to may Asterisk 11.16.0 (faxdetect = yes). The CNG tone is coming to Asterisk through RFC 2833 RTP Event, and Asterisk seems to ignore it, event when i sent DTMF mode to RFC. When CNG comes in RTP stream everything works fine.

The res_rtp_asterisk module does not support this.

thank You very much.

Best Regards