There are multiple ways to manually add and configure a directory number (DN) using Cisco Unified Communications Manager Administration.
From the Directory Number Configuration window using .
From the Phone Configuration window using when you select either Line  - Add a new DN or Line  - Add a new DN link in the Association Information area.
From the Phone Configuration window using after you add the phone under call routing.
From the CTI Route Point Configuration window when you configure a CTI route point using .
This procedure assumes that you are configuring a DN for a new phone using the Phone Configuration window that appeared after you added the new phone to the Unified Communications Manager node.
Only the settings
that apply to your phone model display using this method.
configure phone features at the same time that you add the new DN for the
phone. To see all available DN settings, you must access the
Directory Number Configuration window from call
routing in the user interface.