In Cisco Unified Communications Manager Administration, use the Call Routing > Class of Control > Calling Search Space menu path to configure calling search spaces (CSS).
A calling search space comprises an ordered list of route partitions that are typically assigned to devices. Calling search spaces determine the partitions that calling devices search when they are attempting to complete a call. For more detailed information on calling search spaces and partitions, see the Cisco Unified Communications Manager System Guide.
Calling search space deletions
You cannot delete calling search spaces that devices, lines (DNs), translation patterns, or other items are using. To find out which devices, lines, translation patterns, or other items are using the calling search space, choose the Dependency Records from the Related Links drop-down list box in the Calling Search Space Configuration window and click Go. If the dependency records are not enabled for the system, the dependency records summary window displays a message. If you try to delete a calling search space that is in use, Cisco Unified Communications Manager displays a message. Before deleting a calling search space that is currently in use, you must perform either or both of the following tasks:
Assign a different calling search space to any devices, lines, or translation patterns that are using the calling search space that you want to delete.
Delete the devices, lines, or translation patterns that are using the calling search space that you want to delete.
Before initiating this deletion, check carefully to ensure that you are deleting the correct calling search space. You cannot retrieve deleted calling search spaces. If you accidentally delete a calling search space, you must rebuild it.
The following table describes the calling search space settings.
Table 1 Calling search space settings
Calling Search Space Information
Enter a name in the Calling Search Space Name field. The name can comprise up to 50 alphanumeric characters and can contain any combination of spaces, periods (.), hyphens (-), and underscore characters (_). Ensure each calling search space name is unique to the system.
Use concise and descriptive names for your calling search spaces. The CompanynameLocationCalltype format usually provides a sufficient level of detail and is short enough to enable you to quickly and easily identify a calling search space. For example, CiscoDallasMetroCS identifies a calling search space for toll-free, inter-local access and transport area (LATA) calls from the Cisco office in Dallas.
Enter a description in the Description field. The description can include up to 50 characters in any language, but it cannot include double-quotes ("), percentage sign (%), ampersand (&), back-slash (\), or angle brackets (<>).
Route Partitions for this Calling Search Space
Choose a partition in the Available Partitions list box and add it to the Selected Partitions list box by clicking the arrow button between the two list boxes.
To add a range of partitions at once, click the first partition in the range; then, hold down the Shift key while clicking the last partition in the range. Click the arrow button between the two list boxes to add the range of partitions.
To add multiple partitions that are not contiguous, hold down the Control (Ctrl) key while clicking multiple partitions. Click the arrow button between the two list boxes to add the chosen partitions.
The length of the partition names limits the maximum number of partitions that can be added to a calling search space. The calling search space partition limitations table provides examples of the maximum number of partitions that can be added to a calling search space if partition names are of fixed length.
To change the priority of a partition, choose a partition name in the Selected Partitions list box. Move the partition up or down in the list by clicking the arrows on the right side of the list box.
The following table provides examples of the maximum number of partitions that can be added to a calling search space if partition names are of fixed length. See topics related to partition name limitations in the Cisco Unified Communications Manager System Guide for details about how this maximum number is calculated.
Table 2 Calling search space partition limitations