MOH and Transfers not working through Inter-cluster Trunk between version 9.1 to 6.1.4

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Aug 26th, 2013
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Hi All,

we recently upgraded a customer CUCM system from 6.1.2 to 9.1... it was a stepped upgrade, so in a lab environment we installed the customer version (6.1.2) and restored his data on my lab, then we stepped up to 6.1.4, then upgraded to 9.1..  then we took a backup of the cucm 9 version, installed ( for the customer and did a restore.. this worked perfect.

however, they had an intercluster trunk to another 6.1.4 CUCM.

so basically what exists now is two separate systems (9.1 and 6.1.4) , with a inter cluster trunk between them.  the trunk is up, i can call both ways through it, but MOH and tranfer isnt working... MTP on both sides are checked..

Im not sure if this is a compatibilty issue between the two versions or if im missing something... can someone assit if possible..


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