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Use this window to configure egress-specific call admission control (CAC) configuration for a specified SIP trunk group.

From the SBC main screen, go to Configuration > System Provisioning > Category: Trunk Provisioning > Trunk Group > SIP Trunk Group > CAC > Egress. The Egress window is displayed.

Use the drop-down boxes to select the desired Address Context, Zone and SIP Trunk Group. The Edit Egress window is displayed.

SIP Trunk Group - CAC Egress Edit Window

 

Note: An example dialog box is shown here. Refer to the table below for model-specific allowed values.


Note

SIP subscription CAC limits are not applied to SUBSCRIBE requests from registered users in access deployments.

Use the following table to configure and then click Save.

CAC - Egress Parameters


Parameter

Description

Call Rate Max

Specifies the value of maximum allowed burst in calls/second (above the allowed sustained rate) for egress call attempts.

SBC 5xx0 / 5400 / SWe - Range: 1-450, or unlimited. (The default value is unlimited.)

SBC 7000 - Range: 1-1,350, or unlimited. (The default value is unlimited.)

Note: You can set both “callBurstMax” and “CallRateMax” as unlimited; however, if you assign a value to one parameter, the other must also be assigned a value.

Call Burst Max

Specifies the value of maximum allowed burst (above the allowed sustained rate) for egress call attempts in calls/second. 

SBC 5xx0 / 5400 /SWe - Range: 1-900, or unlimited. (The default value is unlimited.)

SBC 7000 - Range: 1-2,700, or unlimited. (The default value is unlimited.)

Note: You can set both “callBurstMax” and “CallRateMax” as unlimited; however, if you assign a value to one parameter, the other must also be assigned a value.

Register Rate Max

Specifies the maximum sustained egress rate (registrations per second) of initial SIP registrations allowed. (range: 1-1000, or unlimited.

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range is 1-3000, or unlimited).


Note: You can set both “registerBurstMax” and “registerRateMax” as unlimited; however, if you assign a value to one parameter, the other must also be assigned a value.

Register Burst Max

Specifies the maximum allowed burst (above the allowed sustained rate) for egress initial SIP registrations. (range: 1-1000, or unlimited.

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range is 1-3000, or unlimited).

Call Limit

Specifies the total number of concurrent calls (either ingress or egress) allowed on egress. The value ranges from 0 to 2147483647 or unlimited (default).

Emergency Oversubscription

Specifies the oversubscription of resources (as a percentage) that is allowed for emergency calls. The value ranges from 0 to 1000 and the default value is 10.

Extended Emergency IP Limit

The resource oversubscription (expressed as numeric value) allowed for emergency calls. The value ranges from 0 to 40000 with a default value of 0.

Subscribe Rate Max

Specifies the maximum sustained egress rate (subscribes per second) of initial SIP subscribe request. (range: 1-1000, or unlimited.
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range is 1-3000, or unlimited).
Subscribe Burst Max
Specifies the maximum allowed burst (above the allowed sustained rate) for egress initial SIP subscribe request. (range: 1-1000, or unlimited.
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range is 1-3000, or unlimited) .

Other Req Rate Max

Specifies the maximum sustained egress rate (requests per second) of other out-of-dialog SIP requests. (range: 1-1000, or unlimited.

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range is 1-3000, or unlimited).

Other Req Burst Max

Specifies the maximum allowed burst (above the allowed sustained rate) for any other egress out-of-dialog SIP request. (range: 1-1000, or unlimited.

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range is 1-3000, or unlimited).

Hpc OversubscriptionSpecifies the over-subscription of the resources (in a percentage) that is allowed for HPC calls. When the baseline call limit and bandwidth limits are reached, normal calls are not admitted, but additional HPC calls are allowed up to the configured value percentage. The value ranges from 0 to 100 % and the default value is 10 %.

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