Jump to content

Codec issues with OCS pbxnsip and SIP trunks


Recommended Posts

Hi we are testing pbxnsip with OCS and Exchange. I believe I heard OCS will only use the 711 codec. I have OCS pointing to pbxnsip as the gateway. Then pbxnsip points to the SIP trunks .


The issue is being able to use G729 codec on the trunk from pbxnsip to the carrier.


Our trunk carrier can give preference to 729 over 711. We want to save bandwidth so we want whenever possible to use 729.


So I set the trunks from pbxnsip to the carrier to prefer 729 then 711.


If I make a call from a phone connected to pbxnsip all audio quality seems fine. The carrier says it is using 729.


If I make a call from Communicator out the inbound audio is fine but the person I call says it sounds very bad. The carrier says it is using 711.


Since I am codec impaired I really need to know how to specify the codec to use on the trunks so the OCS communicators sound as good as the voip phones.


What are the correct settings to use?





Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...