Tag: CIPT

Calling Search Spaces (CSS) is the second component defining a class of service, and I like to make an analogy by comparing them to your desk drawer. Remember back when you put all your phone books in your desk drawer or on a shelf. A CSS is nothing more than a collection of partitions, or phone books. So if you have the Dallas partition in your desk drawer, then you could call Dallas numbers, and if you have the Chicago partition in your CSS, you could call Chicago numbers as well. But if you don’t have the Dallas partition in your CSS, then you can’t call the Dallas numbers. It is that simple. A Calling Search Space is just a collect of partitions.

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Class of Service within Unified Communication Manager (UCM) is a way of controlling which phone numbers a particular device can call. For example, do you want the phone in the lobby to be able to call a long-distance number? Normally, we would not want this to be possible, and restricting the phone numbers a particular device can reach is used extensively within most corporations. Cisco Class of Service is achieved by implementing two components that allow great flexibility in this area. These two basic components are called Partitions and Calling Search Spaces.

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