# Review the Remote Directory Numbers Forms in the Cluster

After you distribute the portable directory numbers to the cluster elements, the Remote Directory Numbers (RDN) form at each element lists the directory numbers of the remote devices and the directory numbers of resilient local devices. If you have enabled resilient devices, the Remote Directory Numbers form lists the CEID indexes of the secondary controllers that each resilient device is assigned to.

NOTE: The Remote Directory Numbers form is read-only.

Figure 1 shows how the RDN forms would appear for the example given in Add Cluster Elements. Proceed to Program the Network for Route Optimization.

Figure 1: RDN Forms (Example)