First blog of the year, officially not allowed anymore but best wishes for all of you!
After going through some event logs on Frontend servers i came across this warning:
_The Mediation Server service has received a call that does not support comfort noise. This event is throttled after 5 calls from a single Trunk peer._ _The Mediation Server service has received a call that does not support comfort noise from the Trunk, SBC01.domain.com;trunk=SBC01.domain.com_ _Cause: The Trunk does not support comfort noise._ _Resolution:_ _Please ensure the comfort noise option on the Trunk has been enabled._
For the ones who are not familiar with the term, Comfort noise (or sometimes called comfort tone) is synthetic background noise used in communications to fill the artificial silence in a transmission resulting from voice activity detection or from the audio clarity of modern digital lines. If want to read more about Comfort Noise i suggest you to the following pages Wikipedia, and RFC3389.
I’m running a Audiocodes Mediant 1000 for this customer, so let’s fix this warning.
Login to your Audiocodes Mediant and go to Setup, Signaling&Media, Media, RTP/RTCP Settings Make sure you have enabled:
- RFC 3389 CN Payload Type
- Comfort Noise Generation Negotiation
Then go to Setup, Signaling&Media, Coders & Profiles, Coder Groups
Enable the Silence Suspression for all of your configured coders.
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