I have a problem to setup Inter-Cluster communication, I have three sites with different clusters of callmanagers (2 ccm each one). I have configured two trunk from my clusters to others, but just one of them work fine. I use the same configuration. when i try to call numbers in the cluster witch did not work, i get in my phone a silence and after a busy tone.
Could you please help me to troubleshoot the problem?
How to confirm if the problem is of routing or not ? I can ping all callmanagers.
Thanks in advance,