Cisco Unified Communications Manager 8：Expert Administration Cookbook
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Configuring media resource group lists

As the name may imply, media resource group lists are an ordered list of media resource groups which themselves are a listing of media resources. Media resource group lists define the order (and therefore, priority) of media resources to be used by a device.

Getting ready

This recipe assumes all necessary media resource groups have been created as detailed in the previous recipe.

How to do it...

To configure media resource group lists, perform the following:

  1. Navigate to the configuration page for media resource group lists (Media Resources | Media Resource Group List).
  2. Click on Add New to add a new media resource group list.
  3. Specify a meaningful Name.
  4. From the Available Media Resource Groups list, select the appropriate media resource groups.

    Note

    Order is important here. Hardware resources in general should be before software resources.

    How to do it...
  5. Click on Save.

How it works...

Media resource group lists specify, in order, a group of devices available for various media related tasks such as transcoding and conferencing. These lists must be applied to a device to be used.

How we decide to group media resources is an important consideration. We generally do not mix hardware with software media resources, such as software media termination points and conference bridges. The reason is entirely related to performance and the potential impact on call processing.

Software-based media resources have a considerable processing impact, whereas hardware-based resources are specifically designed to perform media-related tasks, such as transcoding and conferencing, and can do so efficiently. For this reason, software resources should only be used as a last resort when hardware isn't available.

There's more...

In order for a device to utilize media resources, it must be assigned a media resource group list.

Applying media resource group lists to devices

Now that we have created the necessary media resource group lists, we will apply them to our devices so that they may take advantage of the media resources.

To apply media resources to an end point, such as a phone, perform the following:

  1. Navigate to the end points configuration page (Device | Phone).
  2. Locate the end point to which the media resource group list will be applied.
  3. Specify the Media Resource Group List under the Device Information section:
    Applying media resource group lists to devices
  4. Click on Save.
  5. Next, click on Apply Config.
  6. On the pop up window, click on OK.
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