Overlapping Site DN Ranges
When DN ranges overlap between sites, numbers can be prefixed with a site code using translation patterns. i.e., lets say Site A uses 1XXX and Site B also uses 1XXX. To allow both sites to be members of the same CUCM cluster, the following steps can be taken:
- Create 2 x new partitions for each set of numbers; i.e. Site A and Site B
- Place the DNs for each site into its own local partition
- Assign the appropriate CSS to either the line or the phone. Ensure that the Partition for Site B does not exist in the CSS for Site A, and vice-versa
- Create a translation pattern in each Partition to allow inter-site calling
The translation pattern must have the following characteristics:
- [Site-Code].[Range] i.e. 91.XXXX
- Set with a CSS of the target site (i.e. for the translation pattern to dial Site A, the CSS of the translation pattern must contain the DNs of Site A)
- Configure predot digit discard
Now when SIte A users prefix the DN with the site code for Site B, DNs at Site B will ring. The converse is true from Site B to Site A.
Prepare partitions
Create calling search spaces
Create translation patterns for site codes