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Use the CAC window to specify call admission control (CAC)

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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.

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Zone name is unique names must be unique across all Address Contexts.

address contexts.


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Emergency calls are allowed even if the Call Limit is configured to 0 (Zero).

The CAC is broadly classified into the following:

  • Egress—Specifies the egress-specific call admission control configuration.
  • Ingress—Specifies the ingress-specific call admission control configuration.

zero).

To View and Edit Zone CAC Settings

On the SBC main screen, go to Configuration > System Provisioning > Category: Base Provisioning > Zone > Cac CAC. The CAC window is displayed.  Use the drop-down lists to select the desired Address Context and Zone.

The Edit Cac Window is displayed:CAC Window opens.

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1CAC Edit Window

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The following fields are displayed:Use the following table to edit the parameters and then click Save.

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1CAC 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
Threshold

Specifies the call limit utilization threshold value.
Bandwidth Limit ThresholdSpecifies 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 OversubscriptionThe oversubscription of resources (as a percentage) that is allowed for emergency calls.
Extended Emergency
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IP LimitAdditional 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

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. The default is unlimited.

Hpc OversubscriptionThis 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 LimitThe number of concurrent subscriptions allowed on this zone. The default is unlimited.


Additional zone CAC settings appear on windows below this window.

 

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