.. _class-of-service:

Class of Service (Subscriber)
--------------------------------

.. _24.1|EKB-18722:

Overview 
..........

Customer administrators and higher level administrators can create and maintain
a Class of Service (CoS) that applies to subscribers. 

A CoS specifies the CUCM and Calling Search Spaces (CSS) for a subscriber's line, thereby
indicating whether local, national, and international numbers can be called.

An administrator can create a CoS at a customer level hierarchy.
A CUCM is specified. A drop-down list of those available at the customer
level is shown. 

Optional device and line CSSs can also be added - either selected from those
existing on the CUCM, or else added. Macros 
can also be used when adding new CSSs, for example, ``CSS-Gold-{{macro.SITENAME}}``.

When a CoS is modified, the CUCM can't be modified. To refer to another CUCM, 
either clone an existing CoS, else, delete it and re-add it.


.. _add-a-class-of-service:

Add a Class of Service (Subscriber)
....................................


1. Log in as a Customer administrator or higher. 
2. Choose the relevant customer hierarchy.
3. Go to (default menus) **Subscriber Management > Class of Service**.
4. Click **Add**. 
5. From the **CUCM** drop-down, choose the relevant CUCM.
6. Fill out a name for the CoS.  
7. From the **Device CSS** and **Line CSS** drop-downs, choose the relevant CSS types to be associated to this CoS.

   .. note:: 

      The value can also be a macro that evaluates to a valid CSS type that already exists on the selected CUCM. Blank values are also allowed.

8. Save your changes. 

   You can view transaction progress and details in the Transaction Logs (when adding, updating, or deleting 
   a subscriber's CoS). 


.. rubric:: Related Topics   
 
* 
  .. raw:: latex

     Transaction Logging and Audit in the Core Feature Guide

  .. raw:: html
  
     <a href="concepts-transaction-logging-audit.html">Transaction Logging and Audit</a>

* 
  .. raw:: latex

     Class of Service (Site) in the Core Feature Guide

  .. raw:: html
  
     <a href="configure_class_of_service.html">Class of Service (Site)</a>