If conference is failing due to a codec mismatch in the logs then there are two possible reasons:
1) Transcoder or hardware conference bridge is either not present in the MRGL or not getting allocated due to all sessions being already used or due to incorrect postion in the MRGL ( example having a software resource at the top and hardware resources in an MRG at the bottom )
2) The calls may be invoking a g729-g729 scenario, in that case the transcoder won't work.
So, you need to verify the region settings on the call manager between the phones --- transcoder / hardware cfb --- trunk / gateway as well as on the dialpeers ( if involved )
Check the Media resource manager messages in the traces after the conference softkey is pressed the second time to complete the conference, it will provide information on whether the transcoder / cfb resource was available or not for the call.
The CFB hardware is at top of MRG followed by Software CFB.
I usually create MRGL"S ie: hardware CFB foloowed by software CFB then create MRG. I have found thru the yeas that by creating list for all the resources , if I have any issue I can just remove list from group without affecting anything else.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
endpoints and other SIP related issues. Even though these traces are in
clear text, these texts can be gibberish unless you understand fully
what they mean. This document attempts to br...
Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
questions and it will render the proper jabber-config.xml file for you
to copy/paste. There is built in logic to verif...
CUCM Database Replication is an area in which Cisco customers and
partners have asked for more in-depth training in being able to properly
assess a replication problem and potentially resolve an issue without
involving TAC. This document discusses the bas...