Use the CAC window to specify call admission control (CAC) limits for a specified zone. The Extended Emergency Limit feature allows an additional configurable number of emergency calls in case the call limit quota and emergency over subscription factor quota are exhausted.
Note
Zone names must be unique across all address contexts.
Note
Emergency calls are allowed even if the Call Limit is configured to 0 (zero).
To View and Edit Zone CAC Settings
On the SBC main screen, go to Configuration > System Provisioning > Category: Base Provisioning > Zone > CAC. The CAC window is displayed. Use the drop-down lists to select the desired Address Context and Zone.
The Edit CAC Window opens.
Figure 1: CAC Window
Use the following table to edit the parameters and then click Save.
Table 1: CAC Parameters
Parameter | Description |
|---|---|
Call Limit | The total number of calls allowed on this zone. |
Bandwidth Limit | Specifies the maximum amount of BANDWIDTH (MaxBW) allowed per second. |
Call Limit | Specifies the call limit utilization threshold value. |
| Bandwidth Limit Threshold | Specifies the bandwidth limit utilization threshold value. |
| Bandwidth Video Threshold | Enter a threshold value (as a percentage of video bandwidth) to limit video streams to a specific bandwidth to prevent video calls consuming call bandwidth otherwise needed for audio calls. Default value is "0" which indicates no video threshold value. |
| Emergency Oversubscription | The oversubscription of resources (as a percentage) that is allowed for emergency calls. |
| Extended Emergency IP Limit | Additional number of emergency calls (expressed as a numeric value) allowed if call limit and emergency oversubscription quota are exhausted. The value ranges from 0 to 40000 and the default value is 0. |
Registration Limit | The number of concurrent registrations allowed on this zone. The default is unlimited. |
| Hpc Oversubscription | This parameter specifies the amount of resource over-subscription (as a percentage) allowed for HPC calls. When the baseline call limit and bandwidth limit are reached, normal calls are not admitted, but additional HPC calls are allowed up to the configured percentage value. (default = 10) |
| Subscription Limit | The number of concurrent subscriptions allowed on this zone. The default is unlimited. |
Additional zone CAC settings appear on windows below this window.
- Egress—Specifies the egress-specific call admission control configuration. Refer to CAC Provisioning - Zone - CAC - Egress
- Ingress—Specifies the ingress-specific call admission control configuration. Refer to CAC Provisioning - Zone - CAC - Ingress
Overview
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