[cisco-voip] Intercluster-trunk calls not working in one direction

[Ruben Montes (Europe)]

Hello,
 
I have one central site CCM cluster that connects with two branch offices (1 and 2), each one with each own CCM cluster (pub+sub).
We have configured intercluster trunks between all of them.
 
We are having a problem stablishing calls in one direction between the central site and one of the branch offices. From the central site point of view, configuration is the same for both branch offices (device pool, partition, CSS, etc...). 
One intercluster trunk is working fine in both directions (with branch office 2), but in the other one, calls are only working in one direction (from branch office to central site). From the other direction calls are not being established.
 
I have tried to change the CCM preference in the trunk configuratioin in both endpoints with always the same result: calls only working from Branch Office 1 to Central Site.
 
I'm really stuck with this, any help would be greatly appreciated...
 
Thanks in advance,
 
Ruben
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