How to Configure Directory Number Routing
------------------------------------------

Use this procedure to define Directory Number Routing. Directory Number
Routing is a translation pattern that is put into the PreISR and ISR
partitions to route intrasite and intersite calls to extensions (directory
numbers). This is similar to the way site location codes (SLCs) are used
as short codes for Type 1, 2, and 3 customer dial plans.

Typically, Directory Number Routing is used for Type 4 (flat dial plans)
so that from a customer and site perspective, you can see which patterns
are directory numbers because there are no SLCs available.

Procedure
.........

1. Log in as provider, reseller, customer, or site administrator.

   Warning:
   
   When adding Directory Number Routing, ensure that you select a valid site
   under your customer in the hierarchy node breadcrumb at the top of the view.
   If you attempt to add Directory Number Routing at any other node in the
   hierarchy, you will receive an error indicating that you must be at a site.
   
   
2. Choose **Dial Plan Management > Site > Directory Number Routing**.
3. Click **Add** to add Directory Number Routing.
4. Enter a prefix in the **Directory Number Routing Prefix** field using up
   to 30 characters.
   Example: Enter 234
5. Enter a DN mask length in the **Directory Number Mask Length** field.
   Example: Enter 4. For this example, the Directory Number Routing would
   be 234XXXX, where XXXX is the mask.
6. Click **Save** to add the Directory Number Routing that you defined.
   The new Directory Number Routing appears in the table and it can be
   edited or deleted as required.