Comfort noise support

Asterisk Asterisk Support
1

Hello

I am using idefisk 1.31 (linux) and connecting to asterisk 1.2 (thru IAX2).
Quality is usually not bad, but i always receive:
Mar 30 10:09:22 NOTICE[26324]: rtp.c:331 process_rfc3389: Comfort noise support incomplete in Asterisk (RFC 3389). Please turn off on client if possible. Client IP: 217.11.128.50

What is “Comfort noise suport” ? Is it supported in asterisk 1.4 ?
How does it affect quality ?

Thanx
Michal

2

it’s also called “silence suppression” … people think they are cut off if it goes completely silent, a bit of noise gives the impression of being connected to something.

AFAIK, it’s not available in 1.4, but i could be wrong. i also don’t think there’s an option in idefisk to turn it off !