LOCATION

Understanding LOCATIONS 

For calls between devices on the same local network, available bandwidth is considered to be unrestricted, and receiving calls, controls do not apply in these cases. Nevertheless, the demands of space travel for the WAN link, which has limited bandwidth available. As more active calls are placed over a WAN connection, the sound quality of each call can begin to degrade. To avoid this degradation in sound quality, you can use the space to reduce the amount of available bandwidth and thus reduce the number of active calls on the link. 

Cisco CallManager uses a hub and spoke topologies in the field. The main, or hub, is the primary Cisco CallManager network management. Using Cisco CallManager Administration, you can specify the place and talked to designate devices at these locations. You can also specify how to allocate the bandwidth for calls between a location and said hub. 

For example, suppose that the places in Figure 16-1 are as follows: 

Location of the band on the hub (kbit / s) 

Concentrator 
Unlimited 

Austin 
100 

Dallas 
200 



For calculation purposes, assume that calls using G.711 compression consumes 80 Kbps of traffic and calls using G.723 or G.729 compression consumes 24 Kbps. Cisco CallManager continues to take new challenges in connection yet available bandwidth for that link drops below zero. Thus, the reference in the Austin location may support two G.711 calls at 80 kbit / s each, five G.723 or G.729 calls at 24 kbit / s each, or one call to G.711 and G.723, one (or G.729) call. Any additional calls that attempt to exceed the speed will not be accepted, and the calling party gets to change the tone. 
Places and Regions 

In Cisco CallManager, a place of work in connection with the regions to determine the characteristics of a communication network. Regions to determine the type of compression (G.711, G.723 and G.729), used here as well as places to determine the amount of bandwidth available for communication. You must designate each device on the network in both regions (with the help of a device pool), and location. As shown in Figure 16-2, the regions and the regions may overlap and intersect in various ways, depending on how you define them. For more information, see "Location" section.

LOCATION