A dial plan in Lync Server 2010 is associated with users and contains a set of normalization rules. Normalization rules are used to convert dial strings entered by users into a format routable by Lync. Dial plans can differ based on region or site depending on how users are used to dialing digits. Additional dial plans are usually created to accommodate different dialing habits based on sites or users. To create a new dial plan, use the following steps:
1. Open the Lync Server 2010 Control Panel.
2. Click Voice Routing.
3. Click Dial Plan.
4. A dial plan can be scoped to apply at the site level, to a specific pool, or even just to a specific set of users. Click New, and then select Site dial plan, Pool dial plan, or User dial plan