I have a customer that has (3)CCM Clusters in different countries, and number of CME Sites.
The best practice would be to link (3) CCM Clusters via (3) H323Gakekeepers at each site to take advantage of 4 digit dialing and simplified dial Plan.
As far as I know that CME can't be integrated via ICT Trunk or H323 GK. It can only be configured as a separate phone system, and will have to use PSTN to call other sites. Am I right?
If I am incorrect, then what would be the best option configuring sites with the CME to take advantage of simplified dial plan and 4 digit dialing.