Before we upgraded to CM6, we had sites that are only allowed to take SIP transcoded calls as G729/a. This was working perfectly fine on our
CM5.2.1 system. After the upgrade, we performed test calls to all sites and noticed CM6 was rejecting showing the following message:
SIP>SIP/2.0 488 Not Acceptable Here (No Matching Codec or Encryption Algo)
Translations hadn’t changed when going from CM5.2.1 to CM6.2. I tried everything I could to try to get CM6 to accept the calls, but I was running
out of time on my change window. I had to remove transcoding completely, from our SBC, and send the call untranscoded as G711 to CM6. I had to make
changes on the IP-Codec and IP-NR below in order to accept G711.
Here is a breakdown of the call flow. These are an SBC to SIP Trunk configuration (IE. Direct SIP Trunk).
1. Call routes from SBC to Avaya SIP Trunk via Signaling Group 35 and Trunk Group 35. IP NR 55 is used for SIP Signaling and was using
IP-Codec 2 to only accept G729a. Media is on IP-NR 101, which was also using IP-Codec 2
2. Inbound DNIS/VDN 7036803 processed on vector 396 and adjunct route request is performed
3. Call is sent to VDN 7036802 on vector 370
4. Call is queued to skill 394 and sent to the next available agent.
5. Test Station 7033095; test agent login 7039999