About Location Setup
In Cisco Unified Communications Manager Administration, use the menu path to configure locations.
Use locations to implement call admission control in a centralized call-processing system. Call admission control enables you to regulate audio quality and video availability by limiting the amount of bandwidth that is available for audio and video calls over links between the locations. For more information, see topics related to call admission control in the Cisco Unified Communications Manager System Guide.
If you do not use call admission control to limit the audio and video bandwidth on an IP WAN link, an unlimited number of calls can be active on that link at the same time. This situation can cause the audio quality of each audio call and the video quality of each video call to degrade as the link becomes oversubscribed.
Do not confuse locations with geolocations. Locations, which you configure by using the Cisco Unified Communications Manager devices for features such as logical partitioning.menu option, allow you to define entities that a centralized call-processing system uses to provide call admission control (CAC). Geolocations, which you configure by using the menu option, allow you to specify geographic locations that you use to associate
In a centralized call-processing system, a single Cisco Unified Communications Manager cluster provides call processing for all locations on the IP telephony network. The Cisco Unified Communications Manager cluster usually resides at the main (or central) location, along with other devices such as phones and gateways. The remote locations contain additional devices, but no Cisco Unified Communications Manager. IP WAN links connect the remote locations to the main location.
Cisco Unified Communications Manager supports up to 2000 locations. The following limitations and restrictions apply:
- Configure as many locations as possible to Use System Default for the RSVP policy.
This enhancement requires a virtual machine OVA with a capacity of 7500 users or larger.
- 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.
Enhanced Location Call Admission Control
The Enhanced Location Call Admission Control (CAC) feature improves the Location CAC mechanism to support more complex networks, including multi-tier, and multi-hop topologies. This feature supports Location CAC within a cluster and among multiple clusters, performing end to end bandwidth deduction. This enhancement to the CAC feature creates a much more flexible and dynamic system for the management of bandwidth.
The Enhanced Location CAC feature is provided by the Location Bandwidth Manager (LBM) service. The LBM service can be configured to run on every node or selected nodes of a Unified Communication Manager (Unified CM) server. For more information, see the chapter Enhanced Location Call Admission Control in the Cisco Unified Communications Manager Features and Services Guide.