Check these items in Cisco CallManager and the IOS? configuration:
Double check the Region and Device Pool configuration in Cisco CallManager, where CODEC is defined. Newer Cisco IP phones (79xx) support G.711 and G.729, while the 12SP+ and VIP30 support G.711 and G.723.
If G.729 is needed between the gateway and Cisco IP phone, make sure the Media Termination Point Required box is not checked on the Gateway Configuration page. Otherwise, the gateway connection always uses G.711.
Make sure the proper CODEC is defined under voip dial-peer on the H.323 gateway. The default is G.729r8.
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...