Add a Directory Number Routing
-------------------------------------

This procedure adds a directory number routing. 

.. note::
   
   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.

**To add a directory number routing**: 

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

   Warning:
   
   When adding directory number routing, you must select a valid site under your 
   customer in the hierarchy node breadcrumb at the top of the view.
   Attempting to add a directory number routing at any other node in the
   hierarchy, a system errors indicates that you must be at a site.
   
   
2. Go to (default menu) **Dial Plan Management > Site > Directory Number Routing**.
3. Click **Add**. 
4. In the **Directory Number Routing Prefix**, enter a prefix, using up to 30 characters (for example, 
   *234*)
5. In the **Directory Number Mask Length** field, enter a DN mask length. For example, if you enter 
   *4*, the Directory Number Routing would be 234XXXX, where XXXX is the mask.
6. Click **Save**. The Directory Number Routing is added. 
   
   The new Directory Number Routing appears in the table and it can be edited or deleted as required.