# Program IP Network and XNET Trunks

If the network has IP trunks or XNET trunks, complete the required trunk programming at each element (see IP Networking Programming).

When programming the ICP/PBX Networking form at each element:

- assign the local element a PBX Number. This PBX Number must match the CEID index that you assigned to the element in the Cluster Elements form.

- assign a PBX Number to each remote element. The PBX Number that you enter for a remote element must match the CEID index that you assigned to it in its Cluster Elements form.

Proceed to Configure the Telephone Directory Forms.

Figure 1: ICP/PBX Networking

Figure 2: Cluster Elements