What does this message mean

i get this message when i extablish a call would u plz tell me what this message suppose 2 mean

rpt.c:330 process_rfc3389 :comfort noise support incomplete in Asterisk .Please turn off on client if possible

This message is caused by the way your sip phone is configured. Look for a setting about transmitting silence. My guess is that your sip phone isn’t transmitting silence. To work best with Asterisk you should set your sip phone to transmit silence. I know I get this message sometimes with X-Lite because by default it doesn’t transmit silence.

I’m not 100% sure, but I think rfc3389 is a way to indicate silence without having to actually transmit audio. Someone else can possibly comment on this.