In a network managed by IBM
® Bandwidth Manager, you can customize bandwidth usage by creating call rate policies. When a call is established, a call rate policy determines whether any changes must be made, such as reducing audio media to a lighter weight codec, reducing video bandwidth by reducing resolution or frame rate, removing video media, or denying the call completely. A call rate policy can be associated with a site, a group of sites, or a group of users. In addition, call rate policies associated with specific users can use the directory identifier or the media IP address (endpoint address).
Call rates are defined for normal circumstances and for times when audio and video traffic on the network is heavy.
- Normal call rate: A call rate policy for a given call specifies the normal call rate for video or audio-only calls.
- Peak utilization call rate: Administrators can specify an alternate call rate when the call consumes bandwidth from a site or link that has or will exceed its configured peak utilization value.
You can define hundreds of different call rate policies, specifying policies for different classes of users, calls between different locations, and for periods of both normal use and peak utilization. You can also precisely control the order by which policies are searched and selected for the case where there are multiple potential matching policies. Examples of typical call rate policies are provided in Call rate policy examples sta852ifr1
Applying call rates to endpoints
You can apply call rate policies to different classes of endpoints:
- Conference rooms might be configured to request calls at 1 Mbps (resulting in HD video).
- Desktop systems might be configured to use a maximum of 512 kbps.
MCUs (devices that connect users with audio and video conferencing) are incorporated as endpoints that are contained within a specific class of user. MCU users are then incorporated into profile definitions like any other class of users. Therefore, multi-party calls are treated like point-to-point calls between a user and the MCU.
Applying call rates to groups
Using groups is a convenient way to apply different call rate parameters to different classes of users. For example, the following call rate policies could be easily configured if users were organized into three groups, VIP users, standard users, and support staff:
- VIP users could be authorized to place calls at 768kb/s calls (resulting in a high-resolution experience).
- Standard users could be limited to 384kb/s calls using CIF (Common Interchange Format), which specifies a speed of 30 frames per second.
- Support staff could be prohibited from using video altogether through bandwidth policies that specify audio-only calls.
You can apply policies to existing Sametime
groups or you can use the Sametime
Bandwidth Manager to create groups. Groups or classes can be defined by matching a variety of attributes associated with users. Users in groups are selected from the user directory configured for the Bandwidth Manager.
Parent topic: Sametime Bandwidth Manager
Sites and links
Configuring call rate policies sta852ifr1
Configuring groups for Sametime Bandwidth Manager sta852ifr1