Adjusting the Dial Plan for an NPA Split

Use this procedure to make adjustments to your dial plan in the case of a Numbering Plan Area (NPA) split.

This procedure describes how to add a new zone with new prefixes to an existing gatekeeper. It also describes how to add new gateways.

Prerequisite: The baseline dial plan is defined and you are in the Design View.

Procedure

  1. Locate the affected zone.

  2. Create a new zone in the same region.

  3. Add gateways to the new zone by one of the following methods:

    1. Move a subset of gateways from the old zone to the new zone.

    2. Use new gateways if they are available.

  4. Set up the following for the new zone:

    1. Assign a zone prefix.

    2. Assign a gatekeeper group. (The gatekeeper group should be the same as in the original zone.)

    3. Create a route scope.

    4. Create egress routes.

    5. Create ingress routes.

  5. Commit your changes to the baseline dial plan. The dial plan is distributed to all gateways, to the new zone, and to all gatekeepers in the gatekeeper group that are assigned to the new zone's address resolution authority (ARA).