A collaboration engineer configures Global Dial Plan Replication for multiple Cisco UCM clusters. The local cluster acts as the hub cluster and the remaining clusters act as spoke clusters. Which…

Location Conveyance on intercluster SIP trunks is primarily used for transmitting location information for E911 services or Call Admission Control, not for global dial plan replication itself.

Intra-Cluster Communication Signaling (ICCS) manages communication within a single CUCM cluster between its nodes, which is distinct from inter-cluster dial plan synchronization.

Mobility Cross Cluster is a feature that extends Mobile Connect (Single Number Reach) or Extension Mobility functionality across multiple CUCM clusters, which is separate from the core dial plan replication function.

The Intercluster Lookup Service (ILS) is the essential service in Cisco Unified Communications Manager (CUCM) that enables Global Dial Plan Replication (GDPR). To configure GDPR in a hub-and-spoke topology, the ILS service must be activated and properly configured on the local (hub) cluster to facilitate the exchange and synchronization of dial plan elements, such as directory URIs and call routing patterns, with the remote spoke clusters.