We are using CCM 4.2(3) and we are having problems making calls over inter-cluster trunk with an other CCM 3.3 version. Route pattern is configured and ICT settings looks fine. Device Pool and Region configuration also looks good. When I dial the number, after all the digits are dialed I get the message "Your call cannot be completed as dialed"
Calling party cluster has three call managers and called party cluster has two call managers. The inter cluster trunk has all of the IP addresses listed in its ICT configuration.
Kindly let me know if there are any known interoperability issues with these versions or any configuration issues