Cisco Unified Communications Manager Administration Guide, Release 9.0(1)
Region setup
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Region setup

Region setup

This chapter provides information to add, update, or delete regions, and synchronize configuration changes with affected devices.

For additional information, see topics related to regions in the Cisco Unified Communications Manager System Guide, as well as topics related to Call Admission Control in the Cisco Unified Communications Manager System Guide.

Audio Codec Preference list

In Cisco Unified Communications Manager (Unified CM) Administration, use the System > Region Information > Audio Codec Preference menu path to configure the order of audio codec preference, both for calls within a region and for between regions.

Unified CM has two default Audio Codec Preference lists, one for lossy regions and another for low-loss regions. These are the Factory Default lossy, and the Factory Default low loss. Start with a default Audio Codec Preference list to create a custom list.

With the Audio Codec Preference feature, you can:

  • Change the relative priorities of audio codecs.
  • Save the custom Audio Codec Preference list with a unique name.
  • Assign custom codec preference lists for use within a region or between regions.
  • Create multiple custom codec preference list.

Create new Audio Codec Preference list

Procedure
    Step 1   Click Add New from the Find and List Audio Codec Preference lists page.

    The Audio Codec Preference List Configuration page is displayed.

    Step 2   Choose an Audio Codec Preference list from the dropdown list.
    Step 3   Click Copy.
    Step 4   In the Audio Codec Preference List Information section, enter a Name and Description.
    Step 5   Place the codecs in the preferred order by using the up and down arrows.
    Step 6   Click Save.

    Edit Audio Codec Preference list

    Procedure
      Step 1   In the Audio Codec Preference lists section, click the list to be edited.

      The Audio Codec Preference List Configuration page is displayed.

      Step 2   Reorder the audio codecs using the up and down arrows.
      Step 3   Click Save.

      Delete Audio Codec Preference list


      Note


      You cannot delete the Factory Default lossy or low loss audio codec preference lists.


      Procedure
        Step 1   Select the list to be deleted from the Audio Codec Preference lists section.
        Step 2   Click Delete Selected. A message box appears "You are about to permanently delete one or more Audio Codec Preference Lists. This action cannot be undone. Continue?"
        Step 3   Click OK.

        About region setup

        In Cisco Unified Communications Manager Administration, use the System > Region menu path to configure regions.

        You use regions to limit the bandwidth that is used for audio and video calls within a region and between existing regions by specifying the transport-independent maximum bit rates for audio and for video calls. You can specify the maximum bit rates for audio and video calls within a region and between existing regions.

        • The maximum audio bit rate determines the codecs that are allowed for calls by filtering out codecs with bit rates that exceed the specified limit.
        • The maximum video call bit rate comprises the sum of the audio and video bit rates, but does not include transport overhead.

        Cisco Unified Communications Manager supports up to 2000 regions. The following limitations and restrictions apply:

        • Configure as many regions as possible to Use System Default for the audio bit rate and video call bit rate fields.
        • This enhancement requires an MCS 7845H1 or higher server.
        • See the "Regions" subtopic under the "Administration Considerations" topic of the "IP Video Telephony" chapter of the Cisco Unified Communications Solution Reference Network Design (SRND) for the current release, which provides recommendations as to how the video bandwidth should be set for regions and locations, so the video portion of video calls will succeed, and the video calls will not get rejected nor set up as audio-only calls.

        Regions setup tips

        For every region, an association exists with that region in other regions; therefore, the addition of regions occurs in a matrixlike fashion. For example, if you add regions A, B, and C, a matrix with region A, region B, and region C as both columns and rows results, as shown in the following matrix:

         

        Region A

        Region B

        Region C

        Region A

        Region B

        Region C

        If you assign 20 regions, the database adds 400 entries (20 x 20). Some performance limitations exist when large numbers of regions are assigned.


        Note


        Cisco Unified Communications Manager allows you to add up to 2000 regions.



        Note


        Cisco recommends that you reset devices after changing a region name.


        Set up regions

        Follow these additional steps when configuring regions.

        Procedure
          Step 1   To configure the settings to use within a particular region, click the name of this region to highlight it in the Regions window pane; then, configure the settings, as described in Table 1.
          Step 2   To configure the default codecs to use between this region and other regions, click another region name (other than this region) to highlight it in the Regions window pane. Then, configure the settings, as described in Table 1.
          Tip   

          For enhanced scalability and to conserve resources, Cisco recommends that you properly set the default values in the Clusterwide Parameters (System - Location and Region) section of the Cisco Unified Communications Manager Administration Service Parameters Configuration window for the audio codec, video call bandwidth, and link loss type values and then choose the Use System Default entries in the Cisco Unified Communications Manager Administration Region Configuration window for these fields.

          Step 3   To save the new region in the database, click Save.
          Tip   

          The Find and List Regions window displays an Rows per page drop-down list box that allows you to list 25, 50, 100, 150, 200, or 250 configured regions. If you choose to display 100 or more regions, Cisco Unified Communications Manager may experience performance degradation.


          What to Do Next

          After you configure a region, you can use it to configure device pools. Devices acquire a region setting from the device pool to which they are assigned.

          Region deletion


          Note


          You cannot delete a region that any device pools are using.


          To find out which device pools use the region, choose Dependency Records from the Related Links drop-down list box on the Region Configuration window and click Go.

          If the dependency records feature is not enabled for the system, the dependency records summary window displays a message that shows the action that you can take to enable the dependency records; the message also displays information about high CPU consumption that is related to the dependency records feature.

          If you attempt to delete a region that is in use, Cisco Unified Communications Manager displays a message. Before deleting a region that is currently in use, you must perform either or both of the following tasks:

          • Update the device pools to use a different region.
          • Delete the device pools that use the region that you want to delete.

          Tip


          The Find and List Regions window displays an Items per page drop-down list box that allows you to list 25, 50, 100, 150, 200, or 250 configured regions. If you choose to display 100 or more regions, Cisco Unified Communications Manager may experience performance degradation.


          Audio and video call bit rate settings

          The following table summarizes the audio bit rate and video call bit rate settings that can be specified for regions.

          Table 1 Region settings

          Field

          Description

          Region Information

          Name

          Enter a unique name for this region. This name can comprise up to 30 characters. Valid characters include letters, numbers, dashes, dots (periods), blanks, and underscores.

          Note   

          Cisco recommends that you reset devices after changing a region name.

          Region Relationships

          Region

          The entries in this column display all regions for which non-default relationships have been configured.

          Note   

          If the relationships between the region that you are configuring and this region specify only default values, this region does not display in this column.

          Max Audio Bit Rate

          The entries in this column specify the maximum audio bit rate between the region that you are configuring and the region that displays in the corresponding row.

          Max Video Call Bit Rate (Includes Audio)

          The entries in this column specify the maximum video bit rate (including audio) between the region that you are configuring and the region that displays in the corresponding row.

          Link Loss Type

          The entries in this column specify the link loss type relationship between the region that you are configuring and the region that displays in the corresponding row.

          Modify Relationship to Other Regions

          Regions

          The entries in this window pane specify all existing regions, including the Default region, the region that you are configuring, and all other regions.

          Choose a region in this pane prior to configuring the relationships between the region that you are configuring and the chosen region.

          Max Audio Bit Rate

          For each region that is specified in the Regions window pane, choose the value from the drop-down list box in this column to set the maximum bit rate to use for audio between this region and the specified region. This setting applies to both audio and video calls and serves as an upper limit for the audio bit rate, which means that audio codecs with higher bit rates than the one that you specify are not used for these calls.

          For example, if you choose 64 kbps (G.722, G.711), G.722 or G.711 may get negotiated for the calls because both codecs use 64 kb/s. G.722 has better audio quality than G.711, so it is preferred for a call.

          • Cisco recommends that you update the intraregion and interregion maximum audio bit rate service parameters. In addition, Cisco recommends that Use System Default option be chosen for this field. Configuring and using the service parameter values facilitates the modification of the Max Audio Bit Rate for many region pairs at one time.
          • Because of bandwidth constraints at most remote-site deployments, use 8 kb/s (G.729) as the recommended setting between a new region and existing regions.
          • If you choose Keep Current Setting, you keep the value that is specified in the Regions Relationships pane for the region pair that you are creating.
          • If you choose Use System Default, the value for the Intraregion or Interregion Max Audio Bit Rate service parameter gets used, depending on the region that is selected. This service parameter supports the Cisco CallManager service.

          Max Video Call Bit Rate (Includes Audio)

          For each region that is specified in the Regions window pane, click one radio button in this column as specified:

          • Keep Current Setting—Click this button to use the current setting for the video call bandwidth.
          • Use System Default—Click this button to use the default value. The default value normally specifies 384 kb/s, unless the default value has been set to a different value in the Service Parameters Configuration window.None—Click this radio button if no video call bit rate is allotted between this region and the specified region. If you choose this option, the system does not allow video calls.
          • kbps—Click this button to set the maximum video call bit rate between the region that you are configuring and the specified region. Enter the bit rate that is available for each video call between these two regions; remember that the audio bit rate is included. Valid values range from 1 to 32256.

          Link Loss Type

          For each region that is specified in the Regions window pane, choose the corresponding value from the drop-down list box in this column to set the link loss type describing the network conditions between this region and the specified region. The link loss type determines the relative preferences for certain audio codecs, optimizing the audio quality based on whether or not the network conditions are lossy. Certain audio codecs are more robust when faced with packet loss, jitter, and delay.

          Choose from the following values:

          • Keep Current Setting—Choose this value to keep the link loss type between the region that you are configuring and the region that you specified in the Regions window pane.
          • Use System Default—Choose this value to use the system default value for link loss type between the region that you are configuring and the region that you specified in the Regions window pane. (System default is set in the Service Parameters Configuration window.)
          • Low Loss—Choose this value to specify a low-loss link loss type between the region that you are configuring and the region that you specified in the Regions window pane.
          • Lossy—Choose this value to specify a lossy link loss type between the region that you are configuring and the region that you specified in the Regions window pane.
          Related Information

          Synchronize region settings with devices

          To synchronize devices with a Region that has undergone configuration changes, perform the following procedure, which applies any outstanding configuration settings in the least-intrusive manner possible. (For example, a reset/restart may not be required on some affected devices.)

          Procedure
            Step 1   Choose System > Region.

            The Find and List Regions window displays.

            Step 2   Choose the search criteria to use.
            Step 3   Click Find.

            The window displays a list of Regions that match the search criteria.

            Step 4   Click the Region to which you want to synchronize applicable devices.

            The Find and List Regions window displays.

            Step 5   Make any additional configuration changes.
            Step 6   Click Save.
            Step 7   Click Apply Config.

            The Apply Configuration Information dialog displays.

            Step 8   Click OK.

            Related Information